Renesis Rotrex SC, busted apex.
08-21-2009, 04:16 AM
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Renesis Rotrex SC, busted apex.
I just busted my one apex, in the rear rotor.
I have a tuning company to help with the setup of the Rotrex supercharger. Well?
I have a MT lt10s Stand-alone ECU. running on stock Renisis. Coils, injectors aso.
I had it running for a month with just the new ecu, to test.
Now i fitted the SC, and started out slowly. good warmup. When i gave throtle it died of at appr 5000 rpms, pict it up with less throtle.
I gave less fuel, fired it up and it came on better, i got a litle boost 0,3 bar. and lots of tork. and then bang, a loud bang and the engine went ded.
Found the upper intake manifold (pleniumchamber) busted a o-ring like gasket. i fix it, and tryed again, now ignition. Like flooded, plugs wet, no compression.
Finally i found out to use my phone to take a picture in tru the plugs hole. BS.... One apex was totaly gone, the to others was covered by rotor mat.
I just now cheked the Rotrex page, and found that the C38/61, witch the tuners gave me, makes a powerfull, 2.0 bar at 8000 rpms, 3.0 bar at 9000 rpms.
I got at least 7000 rpms before it happend. I was standing next to the engine when it bloow, no sounds of detonation or timing knocks. I have a datalog for one ealy run. I have a standard setup to the rx8 engine on the ecu.
AFR was 10,2 -10,4. all coolers was below middel, 70-80 degress.
I have no intercooler yet.
I have extra
My guess to why is:
Blow the o-ring in Intake???? what happens exessive air (false air)
Superheated air from Supercharger.
Exessive boost, to big a charger.
Bad timing, detonation. Dont think so....
I can attach some pictures, with apex, and the data log.
next time i log on.
Pleace give some ideers to why this could happend.
I will dis-assembly the engine now and renovate the stuff, but i dont want to do the same misstake twice.
Rgds Lars DK
PS i have the engine in a prototype jetboat. see www.jetboat.dk
I have a tuning company to help with the setup of the Rotrex supercharger. Well?
I have a MT lt10s Stand-alone ECU. running on stock Renisis. Coils, injectors aso.
I had it running for a month with just the new ecu, to test.
Now i fitted the SC, and started out slowly. good warmup. When i gave throtle it died of at appr 5000 rpms, pict it up with less throtle.
I gave less fuel, fired it up and it came on better, i got a litle boost 0,3 bar. and lots of tork. and then bang, a loud bang and the engine went ded.
Found the upper intake manifold (pleniumchamber) busted a o-ring like gasket. i fix it, and tryed again, now ignition. Like flooded, plugs wet, no compression.
Finally i found out to use my phone to take a picture in tru the plugs hole. BS.... One apex was totaly gone, the to others was covered by rotor mat.
I just now cheked the Rotrex page, and found that the C38/61, witch the tuners gave me, makes a powerfull, 2.0 bar at 8000 rpms, 3.0 bar at 9000 rpms.
I got at least 7000 rpms before it happend. I was standing next to the engine when it bloow, no sounds of detonation or timing knocks. I have a datalog for one ealy run. I have a standard setup to the rx8 engine on the ecu.
AFR was 10,2 -10,4. all coolers was below middel, 70-80 degress.
I have no intercooler yet.
I have extra
My guess to why is:
Blow the o-ring in Intake???? what happens exessive air (false air)
Superheated air from Supercharger.
Exessive boost, to big a charger.
Bad timing, detonation. Dont think so....
I can attach some pictures, with apex, and the data log.
next time i log on.
Pleace give some ideers to why this could happend.
I will dis-assembly the engine now and renovate the stuff, but i dont want to do the same misstake twice.
Rgds Lars DK
PS i have the engine in a prototype jetboat. see www.jetboat.dk
08-21-2009, 08:10 AM
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I think (and this is a rough translation from jibberish to english...) that he only got .3 bars total out of the system. So just under 6 pounds of boost.
And then it sounds like he blew one of his apex seals out of the rotor, and I am guessing it disentigrated and covered the rotor and housing in pieces of itself.
I dont know much about FI on the renesis, or on rotaries in general, but I am willing to bet that the experts will need more background info on the motor before they can diagnose and start to help you.
And then it sounds like he blew one of his apex seals out of the rotor, and I am guessing it disentigrated and covered the rotor and housing in pieces of itself.
I dont know much about FI on the renesis, or on rotaries in general, but I am willing to bet that the experts will need more background info on the motor before they can diagnose and start to help you.
08-21-2009, 08:53 AM
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.3 bar is perfectly safe without an intercooler. We've been running a car at the track all summer on a little more than .3 bar non-intercooled and the engine is still running strong.
An initial thought was you had a damaged engine before installing the SC and that could have been the issue, though you didn't list your timing so it's hard to say. But at ~4 psi I can't even think of how advanced and how close the split could be to blow out a seal that fast.
Did you do a compression test before installing the SC?
An initial thought was you had a damaged engine before installing the SC and that could have been the issue, though you didn't list your timing so it's hard to say. But at ~4 psi I can't even think of how advanced and how close the split could be to blow out a seal that fast.
Did you do a compression test before installing the SC?
08-21-2009, 08:56 AM
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I'll forgive the bad engine since he's in Denmark.
There just isn't enough detail. What kind of fuel setup? Stock injectors? No intercooling is pretty scary as there doesn't seem to be water or alcohol injection to compensate. .3 bar of boost is a little less than four and a half psi. However that can be dangerous if not tuned properly. There is only mention of afr's which is really not a useful thing to know when it comes down to it. The more important thing to know is timing and I'm not sure that was played with.
What it appears to have happened was that he was still getting everything together on the supercharger kit. The unit was installed but not completely tuned. The fuel system wasn't upgraded and an intercooler wasn't even installed. He made the mistake of thinking that taking it easy was safe. This engine will ping in n/a form with low octane gas. With any boost at all and no retuning it's definitely going to detonate.
The sad thing is that excessively rich afr's are nothing more than a bandaid. Many people think that they are cooling their intake charge with fuel yet fuel is a terrible coolant. When you plug in the numbers, he was probably only getting about a 10*F or so temperature drop from that afr as opposed to running at stoich. Yes gasoline is that terrible at removing heat! A small amount of water would have done wonders though. What is happening is that excessively rich afrs are harder and harder to ignite and actually burns slower. That shows up in 2 ways. One is that we can seemingly advance timing more. That's not a good thing though. The other is that detonation is held off a bit. It's not because of lower temps though. It's because we are making the fuel burn slower and wasting a bunch in the process.
I think he probably felt that these rich afrs would be safe when the reality is that they aren't. Even at low boost with no timing adjustments on a high compression engine, it doesn't take much to hurt it. What's the solution? Get it tuned! Get the fuel system designed to handle it. Know what boost levels you are setup for! Then slowly tune it. You can't just take it easy. You can only do it properly or do it again.
There just isn't enough detail. What kind of fuel setup? Stock injectors? No intercooling is pretty scary as there doesn't seem to be water or alcohol injection to compensate. .3 bar of boost is a little less than four and a half psi. However that can be dangerous if not tuned properly. There is only mention of afr's which is really not a useful thing to know when it comes down to it. The more important thing to know is timing and I'm not sure that was played with.
What it appears to have happened was that he was still getting everything together on the supercharger kit. The unit was installed but not completely tuned. The fuel system wasn't upgraded and an intercooler wasn't even installed. He made the mistake of thinking that taking it easy was safe. This engine will ping in n/a form with low octane gas. With any boost at all and no retuning it's definitely going to detonate.
The sad thing is that excessively rich afr's are nothing more than a bandaid. Many people think that they are cooling their intake charge with fuel yet fuel is a terrible coolant. When you plug in the numbers, he was probably only getting about a 10*F or so temperature drop from that afr as opposed to running at stoich. Yes gasoline is that terrible at removing heat! A small amount of water would have done wonders though. What is happening is that excessively rich afrs are harder and harder to ignite and actually burns slower. That shows up in 2 ways. One is that we can seemingly advance timing more. That's not a good thing though. The other is that detonation is held off a bit. It's not because of lower temps though. It's because we are making the fuel burn slower and wasting a bunch in the process.
I think he probably felt that these rich afrs would be safe when the reality is that they aren't. Even at low boost with no timing adjustments on a high compression engine, it doesn't take much to hurt it. What's the solution? Get it tuned! Get the fuel system designed to handle it. Know what boost levels you are setup for! Then slowly tune it. You can't just take it easy. You can only do it properly or do it again.
08-21-2009, 04:26 PM
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Hi and thanks for all the replys.
First, this is a project, if i had people like you near, i would work with them.
My info is that i can run the renesis stock mazda, up too 21 psi of boost.
More boost, bigger injectors, aso.
My ecu has a preprogrammed map for renesis 13b, up to 29 psi. I run on 99 octane
Here is some numbers from my data log:
1950 rpm. Load -14 Hg T.P.S. 41% Timing 23´ Output 6,62 sT
2500 rpm. Load -13Hg Tps 42% timing 30´ 6,62 sT
3000 rpm. Load -15Hg tps 44% timing 30´6,43 sT
4000 rpm. Load -12Hg tps 49% timing 30´6,67 sT
5000 rpm. Load -05Hg tps 52% timing 27´7,48 sT
5250 rpm. Load -00Hg tps 58% timing 27`4,86 sT
5440 rpm. Load +02psi tps 59% timing 27´6,52 sT
Then something not right.
4380 rpm. Load +02psi tps 61% timing 27´11,10 sT
3440 rpm. Load +00Hg tps 59% timing 27´10,14 sT
then it fired again
4380 rpm. Load +00Hg tps 59% timing 27´5,68 sT
This is from a early run, too ritch on fuel.
I have a seperat WB o2 sensor, the ecu has for now only NB.
from this run i trimed just a litle on the fuel, 04% less fuel.
My plan was not to run high boost, at all. the pro tuner told me that he didnt expect more than o,3bar in boost, at 8500 rpm. (later i found info that stated a 2,5 bar 36psi !!!! at 8500)
That Day!
I was chekking for the tubing and plenium chamber, to hold the boost. I had i running for 15 min at 3000, testing cooling. then i gave some throtle at like 60% it did like last, then it fired up again and took the boost, 1 sec. then bang, the intake o-ring poped out, the engine died out (and later found smacked apex) everything happend very fast, i think, i rev to about 7000 rpm, before it happend. maby more?
what is perfekt afr 12,5? I think, tuner sayed 10,2
can you see enything from the numbers i displayed.
what is the senario if the supercharger made a 36 psi boost?
rgds. the student of roteryes
Lars
First, this is a project, if i had people like you near, i would work with them.
My info is that i can run the renesis stock mazda, up too 21 psi of boost.
More boost, bigger injectors, aso.
My ecu has a preprogrammed map for renesis 13b, up to 29 psi. I run on 99 octane
Here is some numbers from my data log:
1950 rpm. Load -14 Hg T.P.S. 41% Timing 23´ Output 6,62 sT
2500 rpm. Load -13Hg Tps 42% timing 30´ 6,62 sT
3000 rpm. Load -15Hg tps 44% timing 30´6,43 sT
4000 rpm. Load -12Hg tps 49% timing 30´6,67 sT
5000 rpm. Load -05Hg tps 52% timing 27´7,48 sT
5250 rpm. Load -00Hg tps 58% timing 27`4,86 sT
5440 rpm. Load +02psi tps 59% timing 27´6,52 sT
Then something not right.
4380 rpm. Load +02psi tps 61% timing 27´11,10 sT
3440 rpm. Load +00Hg tps 59% timing 27´10,14 sT
then it fired again
4380 rpm. Load +00Hg tps 59% timing 27´5,68 sT
This is from a early run, too ritch on fuel.
I have a seperat WB o2 sensor, the ecu has for now only NB.
from this run i trimed just a litle on the fuel, 04% less fuel.
My plan was not to run high boost, at all. the pro tuner told me that he didnt expect more than o,3bar in boost, at 8500 rpm. (later i found info that stated a 2,5 bar 36psi !!!! at 8500)
That Day!
I was chekking for the tubing and plenium chamber, to hold the boost. I had i running for 15 min at 3000, testing cooling. then i gave some throtle at like 60% it did like last, then it fired up again and took the boost, 1 sec. then bang, the intake o-ring poped out, the engine died out (and later found smacked apex) everything happend very fast, i think, i rev to about 7000 rpm, before it happend. maby more?
what is perfekt afr 12,5? I think, tuner sayed 10,2
can you see enything from the numbers i displayed.
what is the senario if the supercharger made a 36 psi boost?
rgds. the student of roteryes
Lars
Last edited by jetboat; 08-21-2009 at 04:33 PM.
08-21-2009, 05:12 PM
#7
I'm using a c30-61 smaller than yours and it ran very happily at 6-8psi.
blowing an apex seal is purely tuning. something happened that your system didn't respond to.
if the install is in a rx-8 I would suggest flash tuning with hymee's protuner.
blowing an apex seal is purely tuning. something happened that your system didn't respond to.
if the install is in a rx-8 I would suggest flash tuning with hymee's protuner.
08-21-2009, 06:26 PM
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Just curious as to why you stated that, seems like he could use that protuner regaurdless, unless he is running a custom flashed ecu.
08-21-2009, 09:43 PM
#10
if it is just the motor in another vehicle why would you fit the std ecu and not run a motech, haltech, microtech or other more easily tuned ecu.
08-21-2009, 09:58 PM
#11
Registered
Perfect A/F ratio is 14 to one, and it is a grenade motor.
Survivable A/F ratio is around 10.5 to 11, do not go to 12.
If the S/C made 36 PSI?
36 PSI is insane.
You need MUCH bigger injectors than stock for 36 PSI.
You MUST have a (very) good inter cooler for 36 PSI and also a methanol injection system to cool that charge.
08-21-2009, 10:06 PM
#13
Rotary Crawfish
Ya'll understand this engine is in a 21 ft jetboat. Look on the first post for the link to his boat site.
A noble try but in the end I think way too little power.
I believe that they are claiming the engine will produce 450 hp.
A noble try but in the end I think way too little power.
I believe that they are claiming the engine will produce 450 hp.
08-22-2009, 04:33 AM
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Hi tanks again.
It is a Stand alone ECU from Microtech (LT10s), with a base map of the rx8.
It was not on purpose to run the engine with high boost. Only 4 - 7 psi, was my ideer.
My own teori, to what happend:
1. to rich mix, made it impossible to ignite fuel under pressure. *** in the datalog.
2. with just a litle less fuel to the mix, reving up the engine, it came over the point and ignited anyway, reving up the engine to 8-8500 rpm. producing a boost of 29-36 psi. (600-700 hp teoritical)
3. faulty for high boost, no intercooler, no internal water/ethernol cooling. the pressure pushed out the o-ring in the intake, making exessive air into the combustion. heating up.
4. false air from the blowed o-ring into the mix, made the igition wrong and made a detonation.
This is just a teori, but my "tuner" compressor suplyer, did suply me with a to big compressor.
And with some false info, telling me that it wouldent make more than 4 psi, at 8500 rpm.
Also he sayed that the air temp in the intake, is not importent. Wrong also, i think its like that the power of the combustion rises 1% per 10c, lower intake air. But i dident fit it for that day.
Then the ECU made a wrong calculation, from the intake temp, saying 36c, when it was more like 80c.
I will try to get back on my suplyer, and get him to be somewhat responsible.
How is the timing looking like, in the early post?
rgds lars
It is a Stand alone ECU from Microtech (LT10s), with a base map of the rx8.
It was not on purpose to run the engine with high boost. Only 4 - 7 psi, was my ideer.
My own teori, to what happend:
1. to rich mix, made it impossible to ignite fuel under pressure. *** in the datalog.
2. with just a litle less fuel to the mix, reving up the engine, it came over the point and ignited anyway, reving up the engine to 8-8500 rpm. producing a boost of 29-36 psi. (600-700 hp teoritical)
3. faulty for high boost, no intercooler, no internal water/ethernol cooling. the pressure pushed out the o-ring in the intake, making exessive air into the combustion. heating up.
4. false air from the blowed o-ring into the mix, made the igition wrong and made a detonation.
This is just a teori, but my "tuner" compressor suplyer, did suply me with a to big compressor.
And with some false info, telling me that it wouldent make more than 4 psi, at 8500 rpm.
Also he sayed that the air temp in the intake, is not importent. Wrong also, i think its like that the power of the combustion rises 1% per 10c, lower intake air. But i dident fit it for that day.
Then the ECU made a wrong calculation, from the intake temp, saying 36c, when it was more like 80c.
I will try to get back on my suplyer, and get him to be somewhat responsible.
How is the timing looking like, in the early post?
rgds lars
08-22-2009, 06:58 PM
#17
Hi tanks again....
4. false air from the blowed o-ring into the mix, made the igition wrong and made a detonation.
This is just a teori, but my "tuner" compressor suplyer, did suply me with a to big compressor.
And with some false info, telling me that it wouldent make more than 4 psi, at 8500 rpm. ...
rgds lars
4. false air from the blowed o-ring into the mix, made the igition wrong and made a detonation.
This is just a teori, but my "tuner" compressor suplyer, did suply me with a to big compressor.
And with some false info, telling me that it wouldent make more than 4 psi, at 8500 rpm. ...
rgds lars
the blower isn't necessarily too big and boost is controlled by the pulley sizes used. yes it might be able to supply 30psi but it wont deliver this boost unless a small pulley size is used. what size pulley are you running on the SC and crank/eccentric shaft?
08-23-2009, 01:36 AM
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I dont think the blown intake manifold made more pressure, just bad air. Confusing the maf sensor, making the mix of fuel and air wrong.
My pulley, the one on the SC is 75mm. the eccentric 140mm. For the Rotrex C38/61. i cant find eny info on the gearing, and how it affect the pressure.
My wishes for this setup was to pull an appr 300 hp. and 8500 rpm.
cooling is 300kw, watercooled.
Intercooler is to be a boostercooler (watercooled intercooler)
My exhaust is a 2 x 76mm Direct flow.
I didnt make a compress test before i fitted the compress but it was running fine, started very easy.
rgds Lars
My pulley, the one on the SC is 75mm. the eccentric 140mm. For the Rotrex C38/61. i cant find eny info on the gearing, and how it affect the pressure.
My wishes for this setup was to pull an appr 300 hp. and 8500 rpm.
cooling is 300kw, watercooled.
Intercooler is to be a boostercooler (watercooled intercooler)
My exhaust is a 2 x 76mm Direct flow.
I didnt make a compress test before i fitted the compress but it was running fine, started very easy.
rgds Lars
08-23-2009, 02:14 AM
#19
I dont think the blown intake manifold made more pressure, just bad air. Confusing the maf sensor, making the mix of fuel and air wrong.
My pulley, the one on the SC is 75mm. the eccentric 140mm. For the Rotrex C38/61. i cant find eny info on the gearing, and how it affect the pressure.
My wishes for this setup was to pull an appr 300 hp. and 8500 rpm.
cooling is 300kw, watercooled.
Intercooler is to be a boostercooler (watercooled intercooler)
My exhaust is a 2 x 76mm Direct flow.
I didnt make a compress test before i fitted the compress but it was running fine, started very easy.
rgds Lars
My pulley, the one on the SC is 75mm. the eccentric 140mm. For the Rotrex C38/61. i cant find eny info on the gearing, and how it affect the pressure.
My wishes for this setup was to pull an appr 300 hp. and 8500 rpm.
cooling is 300kw, watercooled.
Intercooler is to be a boostercooler (watercooled intercooler)
My exhaust is a 2 x 76mm Direct flow.
I didnt make a compress test before i fitted the compress but it was running fine, started very easy.
rgds Lars
08-23-2009, 09:01 AM
#21
If the apexi was lifting / not sealing / breaking (insert "failure" here) it is quite possible (actually happens) that the combusting mixture flashes past the said failed apexi leading to an intake backfire which would then cause a large spike in intake manifold pressure as described. Bye-bye o-ring and then it is all pear shaped from there. Just more sacrifice of parts to the speed gods 
Cheers,
Hymee.
Cheers,
Hymee.
08-23-2009, 09:12 AM
#22
Registered
If the apexi was lifting / not sealing / breaking (insert "failure" here) it is quite possible (actually happens) that the combusting mixture flashes past the said failed apexi leading to an intake backfire which would then cause a large spike in intake manifold pressure as described. Bye-bye o-ring and then it is all pear shaped from there. Just more sacrifice of parts to the speed gods
Cheers,
Hymee.
Cheers,
Hymee.
/30PSI cannot live anyway.
08-23-2009, 09:20 AM
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THANKS BRO.
Thats what i needed, some info that i can go back to the SC suplyer with.
I was pretty sceptic on the setup, with the large SC.
They also suplyed me with, the rim whel, so they would know what to look for.
do you have eny specs for me, on that gearing. enything i can come back with, telling him the results.
I use a dynamic belt tightner (do no word in english)
I think it poped the o-ring becourse of over pressure, its not designed for 30 psi, for sure.
Thank you Rotarenvy.
and Uall.
Rgds Lars
Thats what i needed, some info that i can go back to the SC suplyer with.
I was pretty sceptic on the setup, with the large SC.
They also suplyed me with, the rim whel, so they would know what to look for.
do you have eny specs for me, on that gearing. enything i can come back with, telling him the results.
I use a dynamic belt tightner (do no word in english)
I think it poped the o-ring becourse of over pressure, its not designed for 30 psi, for sure.
Thank you Rotarenvy.
and Uall.
Rgds Lars
Last edited by jetboat; 08-23-2009 at 09:28 AM. Reason: more info
08-23-2009, 02:30 PM
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Renesis SC drive belt ratio
I found some info on the stuff.
My ratio:
eccentric weel: 140mm
SC weel: 75mm
Ratio= 1.866
1000 rpm = 1.866 on compressor weel.
C38/61 Rotrex supercharger Ratio 1.75 (gear internal 1:10)
7000 rpm = 2,15 bar. 31 psi
8000 rpm = 2,45 bar 35 psi
9000 rpm = 3.00 bar 43 psi (maximum)
http://www.rotrex.com/pdfs/Rotrex_Te...Range_V4.0.pdf
My ratio: 1.866
7000 rpm = 2,4 bar 34 psi
8000 rpm = 3.0 bar 35 psi(maximum?) Teoreticaly 800 hp
9000 rpm = 3,65 bar 53 psi
Im not 100% on the numbers, but that gives some idea.
I saw on a early run, that the SC made a boost at 4 psi at 5000 rpm.
can all this be right?
My weel on the SC 75mm, is the 2. smallest for this type, goes up 110mm.
Get brainy with tuning
get ready to disambly
Cheers Lars
Enyone knows of a Renesis for sale, just the block. I would like to have 2. engine for Racing, swapping, alike. fitting super apex from street Racing NZ. Stuff.
My ratio:
eccentric weel: 140mm
SC weel: 75mm
Ratio= 1.866
1000 rpm = 1.866 on compressor weel.
C38/61 Rotrex supercharger Ratio 1.75 (gear internal 1:10)
7000 rpm = 2,15 bar. 31 psi
8000 rpm = 2,45 bar 35 psi
9000 rpm = 3.00 bar 43 psi (maximum)
http://www.rotrex.com/pdfs/Rotrex_Te...Range_V4.0.pdf
My ratio: 1.866
7000 rpm = 2,4 bar 34 psi
8000 rpm = 3.0 bar 35 psi(maximum?) Teoreticaly 800 hp
9000 rpm = 3,65 bar 53 psi
Im not 100% on the numbers, but that gives some idea.
I saw on a early run, that the SC made a boost at 4 psi at 5000 rpm.
can all this be right?
My weel on the SC 75mm, is the 2. smallest for this type, goes up 110mm.
Get brainy with tuning
get ready to disambly
Cheers Lars
Enyone knows of a Renesis for sale, just the block. I would like to have 2. engine for Racing, swapping, alike. fitting super apex from street Racing NZ. Stuff.
08-23-2009, 02:34 PM
#25
I found some info on the stuff.
My ratio:
eccentric weel: 140mm
SC weel: 75mm
Ratio= 1.866
1000 rpm = 1.866 on compressor weel.
C38/61 Rotrex supercharger Ratio 1.75 (gear internal 1:10)
7000 rpm = 2,15 bar. 31 psi
8000 rpm = 2,45 bar 35 psi
9000 rpm = 3.00 bar 43 psi (maximum)
http://www.rotrex.com/pdfs/Rotrex_Te...Range_V4.0.pdf
My ratio: 1.866
7000 rpm = 2,4 bar 34 psi
8000 rpm = 3.0 bar 35 psi(maximum?) Teoreticaly 800 hp
9000 rpm = 3,65 bar 53 psi
Im not 100% on the numbers, but that gives some idea.
I saw on a early run, that the SC made a boost at 4 psi at 5000 rpm.
can all this be right?
My weel on the SC 75mm, is the 2. smallest for this type, goes up 110mm.
Get brainy with tuning
get ready to disambly
Cheers Lars
Enyone knows of a Renesis for sale, just the block. I would like to have 2. engine for Racing, swapping, alike. fitting super apex from street Racing NZ. Stuff.
My ratio:
eccentric weel: 140mm
SC weel: 75mm
Ratio= 1.866
1000 rpm = 1.866 on compressor weel.
C38/61 Rotrex supercharger Ratio 1.75 (gear internal 1:10)
7000 rpm = 2,15 bar. 31 psi
8000 rpm = 2,45 bar 35 psi
9000 rpm = 3.00 bar 43 psi (maximum)
http://www.rotrex.com/pdfs/Rotrex_Te...Range_V4.0.pdf
My ratio: 1.866
7000 rpm = 2,4 bar 34 psi
8000 rpm = 3.0 bar 35 psi(maximum?) Teoreticaly 800 hp
9000 rpm = 3,65 bar 53 psi
Im not 100% on the numbers, but that gives some idea.
I saw on a early run, that the SC made a boost at 4 psi at 5000 rpm.
can all this be right?
My weel on the SC 75mm, is the 2. smallest for this type, goes up 110mm.
Get brainy with tuning
get ready to disambly
Cheers Lars
Enyone knows of a Renesis for sale, just the block. I would like to have 2. engine for Racing, swapping, alike. fitting super apex from street Racing NZ. Stuff.
What is this about apex seals fron NZ ?