vmb

I HAVE A 90 TURBO II .....IVE GOT A STREET PORTE ENG ,RACING BEAT FULL EXHAUST (3INCH DOWNPIPE AND MUFFLERS ),KN INTAKE FILTER ......AT THIS TIME IM HITTING CRAZY BOOST FROM 10 PSI TO 15 PSI AND SPIKING ALL OVER THE PLACE !
YEP YOU KNOW WHAT MY QUESTION IS GOING TO BE!!!!!

IF I BUY A BOOST CONTROLLER CAN I MAKE IT STOP AT 10 PSI ?
WILL IT MAKE MY BOOST CURVE CONTROLLABLE ?
REMEMBER I GOT THE 90 TURBO WASTEGATE AND IT CANNOT BE PORTED LIKE THE 87 !
SOMEONE TOLD ME TO REMOVE THE DOWNPIPE AND RESTRICT IT !
I RATHER NOT DO THAT I FIND A WAY TO CONTROL BOOST
I DONT WANNA GET A EXPENSIVE CONTROLLER AS I REALLY DONT RACE MY CAR OFTEN .....ACTUALLY IVE ONLY RACED TWICE IN A SPAN OF 9 MONTHS .
IF ANYONE CAN HELP WITH THE QUESTION I WOULD APPRECIATE IT!

RETed

TURN OFF THE GODAMN CAPS LOCK WHEN YOU POST!

NO!&nbsp Boost controller can only RAISE BOOST, not lower it.

If I were you, better get yourself an upgrade fuel pump or you're going to blow your engine like...TONIGHT.&nbsp I'm surprised it hasn't died yet.




-Ted

baix2

problbay i am wrong

but my boost controller DID lower my boost,
i have removed cat, DP and catback, boost was around 12psi
and now it's at 8 psi pretty constant
had been running this setup for almost a year

vmb

damn your touchy reted!

let me ask this the .....how can you maintain 10 psi with the mods that i have?....i see lots of people in here with the same mods as me and no blown engines ! and yes the fuel pump has been rewired !

will a boost controller differ the boost curve ?

vmb

what kind of boost controller manual or electronic?

NathanRX7

You could get a pop off valve but I can't imagine that would be much fun.

Erik

[QUOTE]Originally posted by vmb
I HAVE A 90 TURBO II .....
IF I BUY A BOOST CONTROLLER CAN I MAKE IT STOP AT 10 PSI ?
WILL IT MAKE MY BOOST CURVE CONTROLLABLE ?
REMEMBER I GOT THE 90 TURBO WASTEGATE AND IT CANNOT BE PORTED LIKE THE 87 !
: [/QUOTE

so you're saying you can't port the wastegate on the 89-91's? mine was ported by the previous owner so i'm guessing that cut down the boost a bit...how else could i run intake, downpipe, midpipe, and catback and never hit fuel cut

Ryde _Or_Die

[QUOTE]Originally posted by Erik

Quote:

Originally posted by vmb
I HAVE A 90 TURBO II .....
IF I BUY A BOOST CONTROLLER CAN I MAKE IT STOP AT 10 PSI ?
WILL IT MAKE MY BOOST CURVE CONTROLLABLE ?
REMEMBER I GOT THE 90 TURBO WASTEGATE AND IT CANNOT BE PORTED LIKE THE 87 !
: [/QUOTE

so you're saying you can't port the wastegate on the 89-91's? mine was ported by the previous owner so i'm guessing that cut down the boost a bit...how else could i run intake, downpipe, midpipe, and catback and never hit fuel cut

Don't you have a FCD?

kim307

iTrader: (1)

there's a guy on this forum who ports and rebuilds stock turbos. he charges $100 for porting your turbo and $500 for putting a T04 compressor on it with stock turbine. I forgot who and his website address, but you should definitely ask around. Wastegate porting is definitely a possibility and would keep your boost down.

but I say get a fuel upgrade anyways. you could find a F-con on the partstrader for like $200-$300. Get a S-AFC with the F-CON so that F-CON changes the fuel curve according to the boost and you have S-AFC to do fine tuning yourself.

Jay Kim

Erik

[QUOTE]Originally posted by Ryde _Or_Die



Don't you have a FCD? [/QUOTE


i do now...but before i put it in i never hit fuel cut once.

vmb

i do have a fcd ,i just didnt wanto list all the stuff i have ........lets not get side tracked . my question was will the boost controller HOLD psi to a certain point ......i guess it only increases and will not hold or lower psi

vmb

the 89 + turbo wastegates have a flapper and you really dont accomplish anything by messing with them .......thats why i didnt even bother to mess with it when i rebuilt my turbo!

Felix Wankel

So even with a manual one bleeding off like hell, I'll still need to port my wastegate? My first TII wasn't modded as much as this one is going to be (I have a lot of parts coming in next week ).

vmb

hey reted ....do you still have the write up on porting the 90 turbo waste gate ?

RETed

Sorry man, I'm a bit under the weather and was typing at work (WORK SUX!!!)...

Give me a couple more days to put back my website up...&nbsp I really didn't have a write-up on porting the later 1989-1991 Kouki turbo wastegate.&nbsp I do have one for the early 1986-1988 Zenki turbos.

With the big exhaust, porting the 1986-1988 Zenki turbo will give you 12-13psi of boost.&nbsp If you want lower, you'll need to restrict the intake or the exhaust - no other way around it.&nbsp I knew a guy who put in a 2" restrictor plate in their 3" Racing Beat exhaust and got it to go down to 10psi.

Seriously, you really need an upgrade fuel pump to give you more fuel.




-Ted

rx7-rage

u can get a 10psi max manual boost controller. i have this, and my boost wont go over 10. before i got it, i was hitting 12psi not good with the stock intercooler and no fuel upgrades. it is possible, just get that manual boost controller. i don't know who makes it. "the man" don marvel of marvel speed put it on my car as a little extra.

vmb

i already have the walbro fuel pump...........i just didnt list all the crap ive installed on my car!.............i dont wont to mess with putting a plate on the exhaust........i remember on your site it didnt give much info on how to port the 89+ wastegate ........well i guess im back to square one .....ill try to come up with something!

VetteKiller

quote:
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Originally posted by RETed
...NO! Boost controller can only RAISE BOOST, not lower it...
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really? that sucks, glad I didn't spend money one on of those

vmb

it sucks when you dont get a straight answer or better yet when you hear what you didnt want to hear :o