BNR stage 1s poor performance...whats wrong?
Rotary Enthusiast
Joined: Mar 2001
Posts: 1,392
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From: Mechanicsburg, PA USA
My stage 2s work flawlessly in sequential form - KDR was able to pull 370 rwhp at 15 psi and I'm still running a cat and am only using NGK 9s around. Check with Bryan, he has great customer service and will fix something if it's on his part. When I had another set of Stage 2s before running non-seq, I thought they were laggy and Bryan offered to take them back and make them spool faster - make sure it's not venting out somewhere.
Senior Member
Joined: Mar 2002
Posts: 255
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From: Jersey Shore
it may be possible that your stock blow off valve is leaking...?mine was when i had the stock one on and when i put the HKS on i felt a huge difference but i was seeing more then 7Ibs so it is just an idea...
Senior Member
Joined: Jul 2002
Posts: 653
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From: TX
https://www.rx7club.com/forum/showth...hreadid=170687
Originally posted by SPOautos
I doubt it man, he inspects the hell out of those things and they are tight as a bull frogs *** when they leave the shop. I cant imagine it would have total failure the minute you crank it up. For that to happen and they NEVER made boost that means the shaft or something would have to been snaped with no boost. I dont even see how that is possible.
What computer are you running???
STEPHEN
I doubt it man, he inspects the hell out of those things and they are tight as a bull frogs *** when they leave the shop. I cant imagine it would have total failure the minute you crank it up. For that to happen and they NEVER made boost that means the shaft or something would have to been snaped with no boost. I dont even see how that is possible.
What computer are you running???
STEPHEN
Senior Member
Joined: Apr 2001
Posts: 334
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From: Boston, MA, USA
777 - as others have said - have the shop check the line on the turbo assebly itself that goes from the wastegate actuator to the turbo housing. On the stock turbo this line has a "pill" in it, with a small precision hole (oriface). This is an integral part of the stock boost control system. With a non-learning boost control - what you will get with your ECU - and no pill - you will get a nice solid 7 lbs on the second trubos.
If the Precontol actuator line is also missing the pill - you will get a nice solid 7 lbs across the board.
From what you have said - it isn't 100% clear that this is your problem - you could have other control problems, but it is easy to check for.
7 lbs is always suspect - because that is the tension in the wastegate spring. Unless the boost control system is putting in extra pressure through the WG actuator to hold the WG shut.
If the Precontol actuator line is also missing the pill - you will get a nice solid 7 lbs across the board.
From what you have said - it isn't 100% clear that this is your problem - you could have other control problems, but it is easy to check for.
7 lbs is always suspect - because that is the tension in the wastegate spring. Unless the boost control system is putting in extra pressure through the WG actuator to hold the WG shut.
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