North American Turbocoupe Organization



Ford Gauges
Sean Story Offline
Senior Member
#1
i was driving my 88 tc and noticed the boost gauge was at 11 or so psi. i filled it up with premium and flipped the switch, i then was building 10 psi. something wrong with the turbo or is just a dumb ford gauge. ??????
S.STORY \ 88 TURBO (project 2.3) \ Laurel, Delaware 19956.
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tc86 Offline
Junior Member
#2
the stock boost gauge isn't that acurate
1986 soon to have fmic,3" exhaust,25 lbs of boost,la3 conversion,adjustable fuel pressure regulator,gillis
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Jeff K Offline
Administrator
#3
Do you have the stock BCS system yet? If so, the solenoid may not be working correctly or the orifices in the compressor T are plugged.
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
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Sean Story Offline
Senior Member
#4
can you elaborate a little more. does the switch make a noticeable difference when driving. what is a BCS system? what is a "orifices in the compressor T are plugged"??????. thanks for the help and input.
S.STORY \ 88 TURBO (project 2.3) \ Laurel, Delaware 19956.
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Pete D Offline
Administrator
#5
BCS = boost control system
premium fuel switch
orfice

Insert some of these terms here and much will be revealed;
http://natomessageboard.com/cgi-bin/ulti...9;t=000165
Pete Dunham


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thumper Offline
Posting Freak
#6
With the switch in premium, the boost is upped to about 15 psi (IIRC) and the timing adjusted by about 4*. I think the normal mode of the switch is 10 lbs of boost and regular timing.

I would say it is most likely that your gauge is off. I'd get a good boost gauge to test, and then install it. Or just get a reliable gauge and install it, period.
A.K.A. Corey Bennett

1988 TC: white, all options, 5-speed swap, K&N cone filter, "Ranger" roller camshaft, .60/.63 T3, NXS (Gillis-style) Boost Valve, Bosch BOV w/ check valve, Stinger 3" with axle dump (18" glass pack), 95A 3G

Some pictures: http://s639.photobucket.com/albums/uu111/cbennett4041/
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Jeff K Offline
Administrator
#7
There should be a pretty big difference in performance between the reg and prem settings due to the 5 more psi boost allowed in the prem position (roughly 35 more HP in the prem position). Be aware that the stock BCS system only allows max boost (about 15 psi) over 4500 RPM in all gears (later build 88), and only in 1st and 2nd gears over 4500 RPM in 87 and very early build 88.

The best thing you can do for your car is dump the entire stock BCS system and get a Gillis type pressure relief valve to control max boost.
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
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Sean Story Offline
Senior Member
#8
ok thanks guys.
S.STORY \ 88 TURBO (project 2.3) \ Laurel, Delaware 19956.
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xcrunnerbd Offline
Posting Freak
#9
I'm guessing you still have the stock BCS.. Look under the hood on the front of the passenger side fenderwell. There should be a black cylinder with some hoses and wires coming off it. That is the BCS.

These are cheapies not known for longevity. What Jeff K said - dump it.
Project 13 sec. / 30mpg in '88 TC 5Speed : [email protected] / 32+ mpg

On The Car: KN cone, 2-stage [email protected] 15psi wired to fuel switch, Kirban AFPR @ 39psi, Walbro 255 HP FP, 130A 3G Alt., Full 3" Stinger Exhaust incl. cat. no muffler,

Shelf: .48 T3, ported E6, BPV
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