The newest 100% bolt on Greddy Hybrid turbocharger!
#527
#529
Pull My Finger
iTrader: (7)
im pretty curious about this too..im not able to get more than 5 psi out of mine on just the wastegate with no boost controller...but then again im not sure how accurate my electronic prosport boost gauge is **my wastegate actuator arm is closed all the way too..if i cant resolve mine i think i might get a pressure test done by a professional just to give me piece of mind i have no leak
#531
im pretty curious about this too..im not able to get more than 5 psi out of mine on just the wastegate with no boost controller...but then again im not sure how accurate my electronic prosport boost gauge is **my wastegate actuator arm is closed all the way too..if i cant resolve mine i think i might get a pressure test done by a professional just to give me piece of mind i have no leak
#533
Pull My Finger
iTrader: (7)
imo it feels very similar to my non upgraded greddy turbo kit before with spikes to 10 psi and falling off at 8 on my same prosport gauge ***minus the power loss in the upper rpm like the non upgraded greddy*** with the bnr turbo it feels like it makes good power above 8k no prob
#534
1st RX8 BNR Turbo Owner..
iTrader: (1)
So the debate was which dynojet had an accurate O2 reading...
#541
1st RX8 BNR Turbo Owner..
iTrader: (1)
8's? How did you measure that?
Very few wide bands (short of the Horriba) can measure below 9:1.
The factory WBO2S only goes down to 11:1 (10.7:1 on some models).
BTW - you guys that are only seeing 6 PSI on the upgraded turbo have forgotten about flow again, haven't you?
Very few wide bands (short of the Horriba) can measure below 9:1.
The factory WBO2S only goes down to 11:1 (10.7:1 on some models).
BTW - you guys that are only seeing 6 PSI on the upgraded turbo have forgotten about flow again, haven't you?
We figured this out based on the fact that the DJ only was able to read 10.2 I believe. So with as much fuel that we had to remove to make it read in the 11's like we wanted to Kane said it was somewhere in the 8's. I cant remember what percent exactly it was. But it sure was running rich as hell.
Yes, time and time again I always see you pointing out the FLOW talk. I understand it. Thats why people cant make the assumption on HP solely X PSI vs X PSI on two different turbos. Because the flow characteristics are going to be different. Some turbos flow better than others...point taken.
Last edited by J.Cab; 10-23-2009 at 12:29 PM.
#543
Illudium Q-36 Space Moderator
iTrader: (1)
MM,
We figured this out based on the fact that the DJ only was able to read 10.2 I believe. So with as much fuel that we had to remove to make it read in the 11's like we wanted to Kane said it was somewhere in the 8's. I cant remember what percent exactly it was. But it sure was running rich as hell.
Yes, time and time again I always see you pointing out the FLOW talk. I understand it. Thats why people cant make the assumption on HP solely X PSI vs X PSI on two different turbos. Because the flow characteristics are going to be different. Some turbos flow better than others...point taken.
We figured this out based on the fact that the DJ only was able to read 10.2 I believe. So with as much fuel that we had to remove to make it read in the 11's like we wanted to Kane said it was somewhere in the 8's. I cant remember what percent exactly it was. But it sure was running rich as hell.
Yes, time and time again I always see you pointing out the FLOW talk. I understand it. Thats why people cant make the assumption on HP solely X PSI vs X PSI on two different turbos. Because the flow characteristics are going to be different. Some turbos flow better than others...point taken.
I had mine flow tested later on - they were "730" - but in actuality - they were 800cc.
#544
Turbocharger Guru
Thread Starter
The stock wastegate is a 7 psi spring. After pressure drop through the intercooler and a little back pressure on the wastegate valve it gets 4-5 psi to the engine. After that you need a boost controller. If you want to see what the stock wastegate does, remove the boost source going to the wastegate. Keep an eye on the boost b/c it will climb very fast. If your car isn't tuned you don't need to try it. If your boost stays at 4-5 psi, either you have a boost leak or the wastegate is too weak to make more boost. If the boost climbs, then you just need a boost controller. Keep in mind that the more boost you run the more powerband you are going to have.
Bryan@BNR
Bryan@BNR
#545
Boosted Kiwi
iTrader: (2)
/\ Boost controller will only be of any use up to about 6500rpm - after that the increase in backpressure will overwhelm the wastegate and boost will drop away rapidly .
An rpm adjustable boost controller helps but does not completely solve the issue if you are pushing for max. HP .
An rpm adjustable boost controller helps but does not completely solve the issue if you are pushing for max. HP .
#546
Boost Virgin Gonnabe
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The stock wastegate is a 7 psi spring. After pressure drop through the intercooler and a little back pressure on the wastegate valve it gets 4-5 psi to the engine. After that you need a boost controller. If you want to see what the stock wastegate does, remove the boost source going to the wastegate. Keep an eye on the boost b/c it will climb very fast. If your car isn't tuned you don't need to try it. If your boost stays at 4-5 psi, either you have a boost leak or the wastegate is too weak to make more boost. If the boost climbs, then you just need a boost controller. Keep in mind that the more boost you run the more powerband you are going to have.
Bryan@BNR
Bryan@BNR