The newest 100% bolt on Greddy Hybrid turbocharger!
12-01-2009, 06:03 PM
#602
My friend is having a hard time remembering the data I need from him so I'm not sure exactly what he and Steve Kan did to fix the actuator problem. I however just picked up his dyno sheet and I'm going to scan it after work. Higher middle 300rwhp on a mustang dyno if I remembered correctly.
12-01-2009, 07:08 PM
#604
The problem is that many Dynojet operators "correct" their numbers to something a bit more palatable to their customers.
We have one of just about every species of dyno here in Phoenix (Dynojet, Dynapack, Bosch, Mustang, etc.) and the operators are very sensitive to claims of one being more favorable to another.
Therefore, all of them will produce numbers that are within 1% - 2% of each other for the same car under the same conditions.
12-02-2009, 09:49 AM
#607
Turbocharger Guru
Thread Starter
Don't take dyno numbers to heart. They are tuning tools and if your car has a nice tune in it, the engine will be happy for a long time. That is what you want. It is great to be able to say you make 300/400 ect, but dyno numbers can be smoothed, corrected for different conditions. It will make adjustments to the graph.
I tuned my 1st gen RX7 about 2 months ago. Made 56 pulls to 8500 RPM! lol The wide band wasn't working on the dyno and we were having problems datalogging AFR's. The very last pull it went from 22 psi down to 20. The boost had been rock solid the whole day too. We ended up cracking a seal. With a cracked seal and 20 psi the car made 468 RWHP :D. At 20 psi, we made about 20 pulls and they were all in the 472-475 range. So 80/30/30 compression on the rear rotor didn't pull the power down too much. Kinda funny I ran it at the track the following weekend and qualified number 2 at the import faceoff with a hurt engine haha. It went an 11.21 at 127 mph on ET streets driving like a granny lol. Regular drag radials the trap would be around 130.
I tuned my 1st gen RX7 about 2 months ago. Made 56 pulls to 8500 RPM! lol The wide band wasn't working on the dyno and we were having problems datalogging AFR's. The very last pull it went from 22 psi down to 20. The boost had been rock solid the whole day too. We ended up cracking a seal. With a cracked seal and 20 psi the car made 468 RWHP :D. At 20 psi, we made about 20 pulls and they were all in the 472-475 range. So 80/30/30 compression on the rear rotor didn't pull the power down too much. Kinda funny I ran it at the track the following weekend and qualified number 2 at the import faceoff with a hurt engine haha. It went an 11.21 at 127 mph on ET streets driving like a granny lol. Regular drag radials the trap would be around 130.
12-17-2009, 03:44 PM
#608
My friend is having a hard time remembering the data I need from him so I'm not sure exactly what he and Steve Kan did to fix the actuator problem. I however just picked up his dyno sheet and I'm going to scan it after work. Higher middle 300rwhp on a mustang dyno if I remembered correctly.
That scanner of yours .............................. pretty slow huh ?
12-23-2009, 11:04 AM
#609
RX7store.net
Not really true.
The problem is that many Dynojet operators "correct" their numbers to something a bit more palatable to their customers.
We have one of just about every species of dyno here in Phoenix (Dynojet, Dynapack, Bosch, Mustang, etc.) and the operators are very sensitive to claims of one being more favorable to another.
Therefore, all of them will produce numbers that are within 1% - 2% of each other for the same car under the same conditions.
The problem is that many Dynojet operators "correct" their numbers to something a bit more palatable to their customers.
We have one of just about every species of dyno here in Phoenix (Dynojet, Dynapack, Bosch, Mustang, etc.) and the operators are very sensitive to claims of one being more favorable to another.
Therefore, all of them will produce numbers that are within 1% - 2% of each other for the same car under the same conditions.
There is no way to fudge the numbers on a dynojet unless you are going from STD to SAE numbers.
01-01-2010, 04:18 PM
#610
informative thread
did the DIY boost control thread ever get made Kain?
did the DIY boost control thread ever get made Kain?
01-30-2010, 07:02 PM
#612
Been talking with a guy from Sydney who has the BNR upgrade .
he did the (watered down) wastegate mod I suggested and gets 10psi@ 6000 tapering to 7.5-8psi at 8000
Hoping he will post a dyno on here shortly
he did the (watered down) wastegate mod I suggested and gets 10psi@ 6000 tapering to 7.5-8psi at 8000
Hoping he will post a dyno on here shortly
Last edited by Brettus; 01-30-2010 at 07:11 PM.
01-31-2010, 01:05 PM
#616
What is even funnier is that we keep recommending this as an upgrade for the Greddy kit yet no-one has produced a decent dyno for it yet after a whole year despite numerous people having fitted it and tried ..........
Last edited by Brettus; 01-31-2010 at 01:07 PM.
01-31-2010, 01:28 PM
#617
J Cab nearly killed himself trying to appease the RX8 dyno crowd; and always had some kind of mechanical issue.....**** happens.
01-31-2010, 01:52 PM
#619
Here is my first ever dyno sheet with the BNR turbo, the tune was horrible. It was done by an individual that just messed up Kane's tune completely. Not to mention the AFR's were a big issue with what were the proper readings (mine or the dynojet reading) So this is to prove a point since I feel I am being called a liar about this whole actuator BS. I will dyno here soon enough when I get my couplers in.
Seems to have held boost pretty damn well on just the stock Greddy actuator. All the way to redline just like I said!
Seems to have held boost pretty damn well on just the stock Greddy actuator. All the way to redline just like I said!
X/Y = A/B | 284gs / 255 whp = 369gs / ????
01-31-2010, 02:02 PM
#621
Yeah it really irks me how much stock people put in Dyno's they really only matter if you are doing a before and after on the same day... I have tuned a GTO that went from dyno A to dyno B and lost 50 WHP, then we re-tuned and he got 70 more... but he was still bummed that his numbers weren't that far over 400.... so which dyno was wrong / which one was right? And by how much etc?
All I can say for a fact is that due to XYZ changes to that tune he made 70 more horsepower.... that's it - and you know what, that should be enough. Every other single power pull dyno is just an estimate anyway.
All I can say for a fact is that due to XYZ changes to that tune he made 70 more horsepower.... that's it - and you know what, that should be enough. Every other single power pull dyno is just an estimate anyway.
01-31-2010, 02:08 PM
#622
But the reason we do that is that it is really the only 1/2 pie decent way of measuring power between different cars in different places .
We know it is not perfect but it is accepted worldwide as a comparison tool .
Comparing g/s logs is way less credible than a dyno
We know it is not perfect but it is accepted worldwide as a comparison tool .
Comparing g/s logs is way less credible than a dyno
Last edited by Brettus; 01-31-2010 at 02:10 PM.
02-01-2010, 10:31 AM
#623
Turbocharger Guru
Thread Starter
I have built many 60-1 turbochargers for rotary engines. Most of them being full Garretts, but they all make really good power on cars that are set up properly.
The water cooled center is the only route to go with the greddy turbo. All of them (non water cooled center housings) I see, have coaked up bearings. That is because of the heat soak cooking the oil in the turbo. That carbon deposite the coaking makes will start to seize the journal bearing in the rear and then after that the piston ring will start to leak causing smoking.
Bryan@BNR
205 640 1193
02-01-2010, 12:45 PM
#624
/\ totally agree with you on the experience thing - it's almost like it's a must to be doing your own mechanical work and problem solving (and be good at it) on these things to get a decent result .
My oil cool Greddy has lasted 24000kms so far - it was built using 360 degree thrust brgs . I think that is helping a lot .
My oil cool Greddy has lasted 24000kms so far - it was built using 360 degree thrust brgs . I think that is helping a lot .