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Boost creep issues
i have my 93 r1 i have a free flow exhaust no cat 3 inch down pipe mid pipe and a 21/2 tail pipe with a hks style muffler factory air box somebody has drilled stock porting. issue 1 2nd gear boost creep 14 psi all other gears its fine can i drill the restrictar pill everybody talks about to controll it i was gunna put a restrictor in the exhaust if i can drill the pill i like that idea better issue 2 how do people up the boost with stock twins i wannna go to 14 psi if i went with 14 psi could i run a piggy back system or would i need a remapped or stand alone ecu im getting a supra fuel pump and working on a intercooler setup please excuse my grammer
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Your boost creep is a cause for engine failure. 14 psi is too much for the factory ecu. To get the boost under control, you'll need to either add a cat (which does not kill much power) or port the wastegate.
After you get the boost under control, I'd get a power fc and have the car tuned for 12 psi. That is a happy medium between power and reliability with the stock turbos and injectors. Vince |
you can get a couple of manual boost controllers and lower the boost rather then using the pill at all
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If you are having "boost creep", than doing anything with the pills (whether drilling or using a manual boost controller) will have limiting effects. It's possible to bring the boost down below the point at which you are creeping.. i.e. in most cases, people have boost creep when trying to maintain a certain level... Someone may have creep when trying to have a target boost of 12 PSI, but they don't have creep if they have their boost limited to 10 PSI.
It's very car dependent. You can control boost spikes with drilling the boost pills or a boost controller (manual or electronic). Other ways to help with boost creep is to add a little restriction in the exhaust line, something like using restriction plates. These are basically metal gaskets that have a slightly smaller opening than 3". Typically, you just need to narrow the opening just a little to bring your boost back under control. |
How do you know the wastegate can flow enough to stop overboosting?
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Originally Posted by Mahjik
(Post 11686000)
If you are having "boost creep", than doing anything with the pills (whether drilling or using a manual boost controller) will have limiting effects. It's possible to bring the boost down below the point at which you are creeping.. i.e. in most cases, people have boost creep when trying to maintain a certain level... Someone may have creep when trying to have a target boost of 12 PSI, but they don't have creep if they have their boost limited to 10 PSI.
It's very car dependent. You can control boost spikes with drilling the boost pills or a boost controller (manual or electronic). Other ways to help with boost creep is to add a little restriction in the exhaust line, something like using restriction plates. These are basically metal gaskets that have a slightly smaller opening than 3". Typically, you just need to narrow the opening just a little to bring your boost back under control. |
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