Pettit Super Charger Owners
#7001
Registered
iTrader: (3)
i have never seen over 10psi? most of the time i have a straight 9--from 3K up( I dont full throttle until AT LEAST 3K)
Does that mean I have belt slippage? Would I not hear it and wouldnt the engine be erratic?
Maybe my gauge? Mechanical boost/vacum with hook up at the lim.
I am moving good air per maf.
Phil how is your idler pulley done?
????
OD
Does that mean I have belt slippage? Would I not hear it and wouldnt the engine be erratic?
Maybe my gauge? Mechanical boost/vacum with hook up at the lim.
I am moving good air per maf.
Phil how is your idler pulley done?
????
OD
#7002
i have never seen over 10psi? most of the time i have a straight 9--from 3K up( I dont full throttle until AT LEAST 3K)
Does that mean I have belt slippage? Would I not hear it and wouldnt the engine be erratic?
Maybe my gauge? Mechanical boost/vacum with hook up at the lim.
I am moving good air per maf.
Phil how is your idler pulley done?
????
OD
Does that mean I have belt slippage? Would I not hear it and wouldnt the engine be erratic?
Maybe my gauge? Mechanical boost/vacum with hook up at the lim.
I am moving good air per maf.
Phil how is your idler pulley done?
????
OD
Last edited by Phil's 8; 04-02-2010 at 12:46 PM.
#7003
Banned
iTrader: (3)
Yeah, your belt started slipping almost immediately (around 4500 RPM, IIRC), but was screeching like a banshee by 6200 RPM.
You could see on the dyno plot that the boost was surging/oscillating with increasing amplitude as the RPMs went up.
By the time you hit 6000, your manifold pressure was swinging back and forth between 6 PSI and 28 PSI!
However, your airflow was fairly consistent with your actual torque curve.
You could see on the dyno plot that the boost was surging/oscillating with increasing amplitude as the RPMs went up.
By the time you hit 6000, your manifold pressure was swinging back and forth between 6 PSI and 28 PSI!
However, your airflow was fairly consistent with your actual torque curve.
#7004
Registered
Yeah, your belt started slipping almost immediately (around 4500 RPM, IIRC), but was screeching like a banshee by 6200 RPM.
You could see on the dyno plot that the boost was surging/oscillating with increasing amplitude as the RPMs went up.
By the time you hit 6000, your manifold pressure was swinging back and forth between 6 PSI and 28 PSI!
However, your airflow was fairly consistent with your actual torque curve.
You could see on the dyno plot that the boost was surging/oscillating with increasing amplitude as the RPMs went up.
By the time you hit 6000, your manifold pressure was swinging back and forth between 6 PSI and 28 PSI!
However, your airflow was fairly consistent with your actual torque curve.
6000 RPM on a 6 port with the large pulley is right at 13 to 14 PSI, I suppose the lower volume of the 4 port runners could account for the increase to 28 PSI.
Neither the 6 rib belt, nor the blower pressure design is intended for 28 PSI, but still awesome boost from the Lysholm.
Update:
The spacer block between the S/C and the S/C pulley may have been installed backwards, if the top blower pulley was ever removed; it is only designed for one orientation to the blower pulley.
The small aluminium spacer should be checked for weird wear, or chatter marks, also torque the S/C pulley bolt down if the pulley slips on the S/C input shaft.
Last edited by Rote8; 04-02-2010 at 03:38 PM.
#7006
Registered
iTrader: (3)
ha ha--need more than 6 then
MM/Phil ---Dang! A/f's where also affected during the boost fluctuation?
Good tune must have saved him or at least helped.
Who is getting 12-14 psi boost with this system? Like I said I have never seen over 10 and 99% of the time I am at 9.
Root for me --I am headed toward Roebling Road raceway to drive 8 sessions tomorrow with Seat Time. Its my favorite track. Its a Good Friday
MM/Phil ---Dang! A/f's where also affected during the boost fluctuation?
Good tune must have saved him or at least helped.
Who is getting 12-14 psi boost with this system? Like I said I have never seen over 10 and 99% of the time I am at 9.
Root for me --I am headed toward Roebling Road raceway to drive 8 sessions tomorrow with Seat Time. Its my favorite track. Its a Good Friday
#7007
Londons Yellow Peril
ha, just did an airfield autoX day again. I love my car soooo much. It rained and was slippy, and I was power sliding out of corners half way up the straights to the next one! I even did a bit of involuntary rally cross (whoops!) but thankfully didnt get stuck int he mud.....
One cone was great and i was turning into it well before I even got there and doing hero drift all the way around (about 220 degrees or so!) Sweeeeeeet!
The charger gives so much throttle controllability its fantastic....
One cone was great and i was turning into it well before I even got there and doing hero drift all the way around (about 220 degrees or so!) Sweeeeeeet!
The charger gives so much throttle controllability its fantastic....
#7009
Londons Yellow Peril
jeez was the emoticon appropriate or necassary??
I wasn't trying for times at all...
I was having fun... if that makes me a w@nkler then perhaps you should check your priorities?
I wasn't trying for times at all...
I was having fun... if that makes me a w@nkler then perhaps you should check your priorities?
#7011
Registered
iTrader: (3)
If you like drifting like that --you should try modifing the motor mounts --it does give you more on an "instant/solid" throttle response!
Just did a track day at Roebling Road this past Saturday. Used a tank and 1/2 of gas!
My 09 pump is still kicking *** (this track is the one that is notorious for starvation) and i was able to run until 3 dashs from empty.
Modified S 2000's are fast and smooth I can tell you that, but watch their tails--they will kick out at times. These one's did not brake as good as the 8's.
Temps were great and car ran very well---no issues. I only went above 7K rpm's but twice and those times i went to 7.5---top speed attained was 135 (i could have went a little faster--didnt want to--oem safety gear and I had some really good track times. Guess i was driving 8/10? Certain sections 9/10. Testing stuff.
I will return 1st part of May!
Hope a vid soon.
OD
Just did a track day at Roebling Road this past Saturday. Used a tank and 1/2 of gas!
My 09 pump is still kicking *** (this track is the one that is notorious for starvation) and i was able to run until 3 dashs from empty.
Modified S 2000's are fast and smooth I can tell you that, but watch their tails--they will kick out at times. These one's did not brake as good as the 8's.
Temps were great and car ran very well---no issues. I only went above 7K rpm's but twice and those times i went to 7.5---top speed attained was 135 (i could have went a little faster--didnt want to--oem safety gear and I had some really good track times. Guess i was driving 8/10? Certain sections 9/10. Testing stuff.
I will return 1st part of May!
Hope a vid soon.
OD
#7012
Londons Yellow Peril
MM....but it wasn't a competitive event, it was a UK RX8 club event where everyone had fun.
When I did the same course "seriously" on an open day for all cars, I came second, behind a full sprint prepared Elise who knew the course and had track slicks etc. I beat a few 911s, a TVR Tuscan, and a bunch of other stuff.
Happy now, or still randomly offensive?
PS OD sounds like fun at Roebling
When I did the same course "seriously" on an open day for all cars, I came second, behind a full sprint prepared Elise who knew the course and had track slicks etc. I beat a few 911s, a TVR Tuscan, and a bunch of other stuff.
Happy now, or still randomly offensive?
PS OD sounds like fun at Roebling
#7013
DEVILMAN
iTrader: (1)
MM....but it wasn't a competitive event, it was a UK RX8 club event where everyone had fun.
When I did the same course "seriously" on an open day for all cars, I came second, behind a full sprint prepared Elise who knew the course and had track slicks etc. I beat a few 911s, a TVR Tuscan, and a bunch of other stuff.
Happy now, or still randomly offensive?
PS OD sounds like fun at Roebling
When I did the same course "seriously" on an open day for all cars, I came second, behind a full sprint prepared Elise who knew the course and had track slicks etc. I beat a few 911s, a TVR Tuscan, and a bunch of other stuff.
Happy now, or still randomly offensive?
PS OD sounds like fun at Roebling
Have any videos of your autocross laps?
#7015
A not-so-wierd question
Has anyone had their coolant temp sensor go **** up, and if so, what problems did you notice.
If you've never had this problem, what would you expect to see in a car that has a bad coolant temp sensor in terms of starting and fuel mixture.
If you've never had this problem, what would you expect to see in a car that has a bad coolant temp sensor in terms of starting and fuel mixture.
#7017
Zoom-Freakin'-Zoom
iTrader: (5)
If you like drifting like that --you should try modifing the motor mounts --it does give you more on an "instant/solid" throttle response!
Just did a track day at Roebling Road this past Saturday. Used a tank and 1/2 of gas!
My 09 pump is still kicking *** (this track is the one that is notorious for starvation) and i was able to run until 3 dashs from empty.
Modified S 2000's are fast and smooth I can tell you that, but watch their tails--they will kick out at times. These one's did not brake as good as the 8's.
Temps were great and car ran very well---no issues. I only went above 7K rpm's but twice and those times i went to 7.5---top speed attained was 135 (i could have went a little faster--didnt want to--oem safety gear and I had some really good track times. Guess i was driving 8/10? Certain sections 9/10. Testing stuff.
I will return 1st part of May!
Hope a vid soon.
OD
Just did a track day at Roebling Road this past Saturday. Used a tank and 1/2 of gas!
My 09 pump is still kicking *** (this track is the one that is notorious for starvation) and i was able to run until 3 dashs from empty.
Modified S 2000's are fast and smooth I can tell you that, but watch their tails--they will kick out at times. These one's did not brake as good as the 8's.
Temps were great and car ran very well---no issues. I only went above 7K rpm's but twice and those times i went to 7.5---top speed attained was 135 (i could have went a little faster--didnt want to--oem safety gear and I had some really good track times. Guess i was driving 8/10? Certain sections 9/10. Testing stuff.
I will return 1st part of May!
Hope a vid soon.
OD
sounds like you were 7/10s on the straight! and i bet real real fast everywere else, just saying.
wait, i have to figure out the 09 tranny + you sc.. dude.. i hope you have a beers or two in may. got lots of questions for you..
beers
#7019
Originally Posted by dannobre
It will run in open loop...really rich
Or go into limp mode and not really run at all
Should start fairly normal..it's open loop anyway...but it could flood easier..and likely not run well after a few minutes of idle
Or go into limp mode and not really run at all
Should start fairly normal..it's open loop anyway...but it could flood easier..and likely not run well after a few minutes of idle
#7021
#7023
Before I pull it down the street I'm going to replace the coolant temp sensor; it may have been crapped out all along. Any other ideas at this point are more than welcome.
#7025
Registered
iTrader: (3)
heres a little vid from RR--i was playing around. the S2 was tracked prepped and the driver was good.
if i stay in 5th down the straight longer then that is a sign that i was pushing a little harder. I was experimenting with lines and gears a lot.
sorry the mic is the pits at speed
the long left handed turn is a 105-110 mph turn--my favorite off all turns!
http://www.vholdr.com/node/80364
OD
if i stay in 5th down the straight longer then that is a sign that i was pushing a little harder. I was experimenting with lines and gears a lot.
sorry the mic is the pits at speed
the long left handed turn is a 105-110 mph turn--my favorite off all turns!
http://www.vholdr.com/node/80364
OD