question about FMIC Options

[toyotacrazy]

I just installed a FMIC and 2" piping with a turbo xs bypass valve. It is recirculated. Now Im hearing a loud whistle, sounds like the turbo spooling up. It only happens when boosting while in the petal. Is this normal? I just want to make sure nothing is wrong. Also my boost seems low. I was boosting 7-9 with the top mount intercooler. now Im boosting 6-6.5. Maybe I need to drive it to let the ecm relearn??????? Thanks for any input..
-toyotacrazy

This post has been edited by toyotacrazy: Jan 22, 2007 - 2:31 PM

[lagos]

you have a leak in your setup

[toyotacrazy]

so it shouldnt whistle or make a loud spooling sound???

[playr158]

the less boost is probably due to a pressure drop in the system...typical of a not so high quality setup

i wouldn't so much think a leak would "whistle"

but search "boost leak finder" and use that setup and find out if you have a leak

This post has been edited by playr158: Jan 22, 2007 - 6:39 PM

[lagos]

if your hearing something funny...and your getting less boost then you did with the top mount, then chances are the sound you hear is your leak. sometimes its a loose coupler or sometimes you need to adjust your bov.

at the very least, you should be able to hit 10psi.

[toyotacrazy]

well, Im hitting about 2 psi less at most. It is a cheaper intercooler. Maybe its restricted in the intercooler. I am pretty sure the whistle is the turbo spooling up. I did notice that when Im approaching 0 psi when its pulling out of vacuum it whistles. Or the bov is allowing blowby because the spring is too weak. Ill try swapping it with a stiffer spring since I know someone with one handy.
Is there any way you can trick the wastegate on the 3sgte? I know on the single turbo supra by putting a stack of washers between the wastegate and the turbo you could increase boost. I think the setup of the 3sgte is different.

[playr158]

just unplug your wastegate hose, it should boost through the roof


no but honestly you'd have to have a really really really poor BOV to leak at 0psi

This post has been edited by playr158: Jan 23, 2007 - 9:01 AM

[toyotacrazy]

Before I put the fmic on I pinched off the wastegate hose. The boost hit 14 psi then went into fuel cut. Im just looking for a free of cost way to increase my boost. I may just end up getting a manual boost controller.

[playr158]

i wouldn't install an MBC until you confirm your problem.

"Get the cure, not the bandaid"

[toyotacrazy]

I still have a stock gt exhaust. With the dp convertor and gt convertor....source of problem??????

[playr158]

yea you need to get rid of that your exhaust system can't flow enough gas to allow boost to build

its like blowing into a paper towel tube...you can blow lots very fast
then try to blow into a McDonalds straw, all that air backs up and takes forever

This post has been edited by playr158: Jan 23, 2007 - 2:49 PM

[lagos]

I still have a stock gt exhaust. With the dp convertor and gt convertor....source of problem??????

no. your problem is that you have a boost leak. make a tester and find the source of your leaks. its either because of your bov, an intercooler coupler or a vac line. its as simple as that.

then, if you want to run more boost, get a cheap mbc. dont try to ghetto rig something, or you'll regret it later

i had a very restrivtive exhaust on my car too at one point. it still boosted to the stock 10psi, just fine.

[toyotacrazy]

I did fix what I think was a boost leak. I retorqued all my IC piping connectors and they had loosened up quite a bit. After that It ran much better and the whistle sound is pretty much gone. I was boosting a little higher around 7. I removed all the bolts from the wastegate and installed 4 washers between the wastegate and the turbo housing. WOW! Now I hit 10 psi every time. What a HUGE difference! Thanks for all the advice...
-toyotacrazy