North American Turbocoupe Organization



88 Turbo Coupe stock boost?
shodown220 Offline
Junior Member
#1
I can't find a definite answer to this anywhere through searching. I got my 88 turbo coupe running today, doesn't seem to be boosting much. About 9 psi is all I'm seeing. Car is a 5-speed, i thought they were suppose to be more about 14 or 15? Thanks for any input!
88 TC
Reply

Blue Oval Bird Offline
Member
#2
9 PSI is all you get on the regular switch setting. On the Premium setting you get 15 PSI in 1st and 2nd and then again after 4000 RPM in 3-5.

Check the fuel switch setting, it's probably on regular.
1988 Turbo Coupe: 5-speed, 75k original one owner garage kept miles.

MODS: K&N filter on the VAM, Gillis Boost Valve @ 16 PSI, Walbro 255 lph pump, Kirban AFPR, Full STINGER 3" turbo back exhaust with Magnaflow muffler, Motorsports 140 MPH Speedometer.
Reply

Jeff K Offline
Administrator
#3
Later 88 had 15psi in all gears over 4K RPM. Just a minor LA3 programming change.

If switch is in Premium and still 9 max, the BCS (which most of us get rid of and use aftermarket boost control) is likely not functioning.
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
Reply

shodown220 Offline
Junior Member
#4
Quote:Originally posted by Jeff K:
Later 88 had 15psi in all gears over 4K RPM. Just a minor LA3 programming change.

If switch is in Premium and still 9 max, the BCS (which most of us get rid of and use aftermarket boost control) is likely not functioning.
9 PSI in premium setting also. It also spark knocks a little in premium setting too, but not in regular. Previous owner told me he only runs premium fuel. Is the BCS a cheap or easy fix? I'm not going to go aftermarket boost control, just want factory settings.
88 TC
Reply

Pete D Offline
Administrator
#5
The stock BCS is cheap plastic which get brittle/cracks. They are obsolete so used is all you are going top find. It the round thing with 2 vac lines and an electrical connector on the passenger side inner fender
Pete Dunham


Reply

shodown220 Offline
Junior Member
#6
Quote:Originally posted by Pete D:
The stock BCS is cheap plastic which get brittle/cracks. They are obsolete so used is all you are going top find. It the round thing with 2 vac lines and an electrical connector on the passenger side inner fender
Well that sucks about the used thing. No idea where to find one at then.... any way to tell if its bad or bypass it or something?
88 TC
Reply

UglyBird85 Offline
Senior Member
#7
Just bypass it, get an aftermarket boost controller for $40(if that) and set it to factory boost level.

And when you get the itch, (which you will), turn it up a lil higher.
---Justin

87 Burgundy TC 5spd. K&N Cone filter-Walboro 255HP-.60/.63 Garret T3-Gillis @ 18psi.
SHELF: NPR FMIC-Ford Racing 42# injectors-Tripminder-
Reply

shodown220 Offline
Junior Member
#8
Quote:Originally posted by UglyBird85:
Just bypass it, get an aftermarket boost controller for $40(if that) and set it to factory boost level.

And when you get the itch, (which you will), turn it up a lil higher.
I'm guessing there is no way to bypass it without an aftermarket boost controller, even for stock boost level? I would rather not go this route, but if thats my only option then where do you suggest getting one at?
88 TC
Reply

UglyBird85 Offline
Senior Member
#9
www.boostvalve.com

You wont be sorry.
---Justin

87 Burgundy TC 5spd. K&N Cone filter-Walboro 255HP-.60/.63 Garret T3-Gillis @ 18psi.
SHELF: NPR FMIC-Ford Racing 42# injectors-Tripminder-
Reply

Blue Oval Bird Offline
Member
#10
Quote:I'm guessing there is no way to bypass it without an aftermarket boost controller, even for stock boost level? I would rather not go this route, but if thats my only option then where do you suggest getting one at?
You can't get rid of the stock Boost Control Solenoid without replacing it with another boost controller, be it manual or other.

If you want stock level boost, you HAVE to use a boost controller.

Removing or bypassing the BCS will give you uncontrolled boost levels that will destroy your turbo and hopefully not your engine.

Go with the Gillis valve. It builds boost faster than the BCS allowing faster spoolup of the turbo. You won't be disapointed.
1988 Turbo Coupe: 5-speed, 75k original one owner garage kept miles.

MODS: K&N filter on the VAM, Gillis Boost Valve @ 16 PSI, Walbro 255 lph pump, Kirban AFPR, Full STINGER 3" turbo back exhaust with Magnaflow muffler, Motorsports 140 MPH Speedometer.
Reply





Users browsing this thread:
1 Guest(s)



Theme © iAndrew 2018 - Software MyBB