Free boost modification

[EvilZL1]

Originally Posted by Emvici

I am making 15 lbs of boost with only a 2.55 upper pulley, after doing the boost bypass adjustment!.

Sounds good, can you tell a difference


Sent from Wayne's Manor

[polarisiq93]

after i adjusted mine to how it is in the pic above on the factory boost gauge which I know isn't crazy accurate it is almost at 15 at wot in 2nd gear, it used to be between 7 and 15 before

[winterboy8]

I must not understand the purpose of the set screw. I thought the process was to ensure the arm physically touched the set screw, then go another 1/4 to 1/2 rotation so as to "crack" the butterfly slightly open. If the arm is not even touching the set screw, wouldn't the butterfly be fully closed? I'm missing something here for sure. Damn, now I have to read most of this lengthy thread again. haha

[Whos_Drivin]

Originally Posted by winterboy8

I must not understand the purpose of the set screw. I thought the process was to ensure the arm physically touched the set screw, then go another 1/4 to 1/2 rotation so as to "crack" the butterfly slightly open. If the arm is not even touching the set screw, wouldn't the butterfly be fully closed? I'm missing something here for sure. Damn, now I have to read most of this lengthy thread again. haha

My understanding is the set screw is meant to keep it slightly open. In cold weather the opening may contract enough to where it can get stuck. But that's just what I remember reading...not sure if that's the real reason.

[Emvici]

Originally Posted by EvilZL1

Sounds good, can you tell a difference


Sent from Wayne's Manor

There is a very noticeable difference from 40 mph - 90 mph, as before
the adjustment, I only had around 12lbs of boost.

[winterboy8]

Originally Posted by Whos_Drivin

My understanding is the set screw is meant to keep it slightly open. In cold weather the opening may contract enough to where it can get stuck. But that's just what I remember reading...not sure if that's the real reason.

So all of these pictures of people showing their setup, as delivered from the factory, with the set screw not even touching, should be getting maximum boost as the butterfly should be completely closed. If that's the case, then the original post #1 is moot. If it is touching, then I do the "fix" and risk my butterfly getting stuck closed, but supposedly this is only supposed to happen to folks living where it's cold, even though metal expands when it gets hot. Wow, this doesn't add up, UNLESS, these are dissimilar metals and we have a race condition and now we have 2 metals expanding and contracting at different rates and amounts. Perhaps that's the issue and it is most commonly seen at colder temps. hum, might have to try anyway as I'm in warm Florida.

[Emvici]

winterboy, yes you want the butterfly closed all the way. when the butterfly is cracked open, then boost leaks out. It is ok for the stop screw to be touching the plate, as long as it is not pushing the butterfly open.

[JANNETTYRACING]

Originally Posted by polarisiq93

My car was only making 9 lbs of boost with the 2.55 pulley, I watched the video and then checked my bypass valve and turns out it was tilted forward with the set screw pushing the plate back. I tilted it back a bit and the set screw isn't touching now I haven't been able to drive it yet but hoping for a little whine that I haven't heard yet since I've had the car

This should be sitting against the stop screw or you are leaving the butterfly partially open.

Ted.

[polarisiq93]

Originally Posted by JANNETTYRACING

This should be sitting against the stop screw or you are leaving the butterfly partially open.

Ted.

okay thanks ted so just touching but not pushing the plate

[tnspd]

If I have a tune now would adjusting this require me to get my tune adjusted. I know my tuner told me if I do anything else I will need bigger injectors. My injector duty cycle is a 100%.

[rjs2010SS]

Originally Posted by tnspd

If I have a tune now would adjusting this require me to get my tune adjusted. I know my tuner told me if I do anything else I will need bigger injectors. My injector duty cycle is a 100%.

This is a good question as I had mine replace under warranty. It would be nice to know if any adjustments to the tune would need to be made. Can someone please give some sort of incite on this as I am going to get my car this afternoon and would like to bring it up when I get there.

[jayno20]

Don't want to sound like an idiot, but I got the tool from Lingenfelter and I don't really know how to use it.

Is there any videos or walkthroughs on exactly how to use this thing to make sure it is adjusted properly?

[winterboy8]

Originally Posted by jayno20

Don't want to sound like an idiot, but I got the tool from Lingenfelter and I don't really know how to use it.

Is there any videos or walkthroughs on exactly how to use this thing to make sure it is adjusted properly?

I feel a little uneducated on this too, so you're not alone. I ordered one as well and here are the links I found on here on how to adjust it. For some reason I can't see the pics/instructions, so not sure if everything is here on how to adjust and use the tool.

http://www.camaro5.com/forums/showth...=398573&page=5

http://www.camaro5.com/forums/showpo...&postcount=406

Hope these help. I'm gonna try this weekend myself, I'll post anything I find.

[jayno20]

Originally Posted by winterboy8

I feel a little uneducated on this too, so you're not alone. I ordered one as well and here are the links I found on here on how to adjust it. For some reason I can't see the pics/instructions, so not sure if everything is here on how to adjust and use the tool.

http://www.camaro5.com/forums/showth...=398573&page=5

http://www.camaro5.com/forums/showpo...&postcount=406

Hope these help. I'm gonna try this weekend myself, I'll post anything I find.

hmm. Those pictures help a little bit... I can send them to you if you still can't see them. I might try this later this week.