begi and boost creep
so on the weekend, i installed the begi downpipe for my greddy kit.
now, i get some scary boost creep. it'll hit 6psi, then creep up from there to about 8 or 10psi. i've only got the 1.6l injectors, so this can spell disaster. anyone else get this? ideas? |
yeh...it will be fun for a while but if you want to keep her safe you need tuning and more fuel.
trust me! just invest a little in some tuning and it will pay off in the long run! |
that's a feature, not a problem. get yourself some injectors and/or a hp fuel pump and enjoy.
I have never heard of a boost creep problem with the greddy. It's always a boost droop. Perhaps some porting on the turbo's turbine out would get it flowing better. Where does your WG actuator reference boost signal? |
the wastegate has a vacuum line to the turbo housing.
do you recommend just the injectors? or will i need a fuel pump to go with the injectors? and if so, which fuel pump? i was thinking about getting the 7MGENA supra injectors to be safe. but i'm no expert. |
I would *think* the Begi would make the boost drop, not creep, since the WG gasses aren't nearly as choked as the "Stock" downpipe..
My Begi just arrived yesterday.. Are you sure you did nothing else to the car that might have caused this? |
yeah you'd probably be good with the 300cc injectors only. i'm thinking by the time your boost creeps, the ecu is at 90% duty cycle. be safe, get a wideband.
check to make sure that your actuator rod can move feely and the flapper door actually opens fully. like i said, I've never heard of creep on a greddy, only droop, and usually bad droop due to their shitty wg actuator. |
haha, I was going to say the problem is!??!
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you get boost creep because the WG is too small to pass that much gas. it's more apparent on low-boost setups because less exhaust is going through the turbo and more is diverted through the WG.
if you dont want to change the fuel system, port the wastegate. |
i just checked the wastegate to see if it moves, but i cant get the wastegate flap to open manually. this may be my problem.
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Originally Posted by reckless_abandon
(Post 136043)
i just checked the wastegate to see if it moves, but i cant get the wastegate flap to open manually. this may be my problem.
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that makes sense.
i havent tried to move it while disassembled. |
Originally Posted by kotomile
(Post 135962)
I would *think* the Begi would make the boost drop, not creep, since the WG gasses aren't nearly as choked as the "Stock" downpipe..
My Begi just arrived yesterday.. Are you sure you did nothing else to the car that might have caused this? The only cure for boost creep is to port the wastegate.... well that or just turn up the boost...but yea |
I've heard of the same problem on FDs when you get a downpipe or pull out the cat. Their solution is like y8s said, porting the wastegate.
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Originally Posted by reckless_abandon
(Post 136244)
that makes sense.
i havent tried to move it while disassembled. |
what is involved in porting the wastegate? and should i get a professional to do it?
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I would say if you have to ask, let a pro do it.
I have always wanted to do this: http://www.gpopshop.com/portpolish.html (minus the exterior polish that is) I'd bet the gains are as worthwhile as they claim. |
Is it just take off turbine housing, radius the corners, polish?
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Another question: I have the stock 1.6 injectors on mine now, but with a 190HP. Vortech FMU is untouched, so 12:1 disc. If I bolt on my Begi DP and get boost creep to, say, 8 psi, will I run lean?
And another: If I bite the bullet and get the AEM EBC.. will it help to control the creep? |
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