The newest 100% bolt on Greddy Hybrid turbocharger!
10-22-2009, 11:22 PM
#527
10-22-2009, 11:47 PM
#529
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
10-22-2009, 11:48 PM
#530
Hmm. Some might be up to a 1/2 point off, but most are dead on if you don't have a CAT.
Its hard to get outside air to reenter an exhaust that is pumping out at several hundred CFM.
Would you buy a ruler if the salesman told you that it is always exactly 1/8" off?
Its hard to get outside air to reenter an exhaust that is pumping out at several hundred CFM.
Would you buy a ruler if the salesman told you that it is always exactly 1/8" off?
10-22-2009, 11:48 PM
#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
10-22-2009, 11:59 PM
#533
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
10-23-2009, 12:02 AM
#534
So the debate was which dynojet had an accurate O2 reading...
10-23-2009, 12:57 AM
#535
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?
10-23-2009, 10:59 AM
#541
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.
10-23-2009, 01:17 PM
#542
Whilst I understand what you are saying , the simple fact is that the BNR at 6 psi is going to make somewhere around 265whp (depending on tune etc)- I doubt very much that these guys will be happy with that .
Last edited by Brettus; 10-23-2009 at 01:22 PM.
10-23-2009, 05:00 PM
#543
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.
10-24-2009, 11:15 AM
#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
10-25-2009, 01:25 PM
#545
/\ 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 .
10-25-2009, 02:35 PM
#546
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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
go and finish the turbo that i sent you. 
that will be your face when you do....