North American Turbocoupe Organization



BOOST IN 1ST GEAR?
347BIRD Offline
Member
#1
how much boost should we be creating in 1st gear , manual trans? 15 right?
1988 Blk T-Bird, 5-spd, Raven int, 3G Alt, K&N conical, Boost controller, ported E6, ported and polished IHI @ 16 psi, 03 Cobra wheels, 255/40/17, 275/40/17, SN95 BBK lowering springs, SN95 Koni struts and shocks, Maximum Motorsports C/C plates, SN95 BMR tubular A-arms, Aluminum driveshaft, LED's, 255 LPH 
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Jeff K Offline
Administrator
#2
With the stock BCS system, 14 psi in 1st and 2nd, 10 psi in 3 thru 5. Get a GIllis valve manual boost controller. You can set the boost to any value you like and it wont drop to 10 psi in higher gears. Makes the car MUCH more fun!!!! The stock electronics can handle 16 or so psi. If doing this you may want to upgrade the stock (and likely old) fuel pump.
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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347BIRD Offline
Member
#3
The car has an adj boost controller on it and makes about 17psi in every other gear but 1st. that's what has me cornfused, ha
1988 Blk T-Bird, 5-spd, Raven int, 3G Alt, K&N conical, Boost controller, ported E6, ported and polished IHI @ 16 psi, 03 Cobra wheels, 255/40/17, 275/40/17, SN95 BBK lowering springs, SN95 Koni struts and shocks, Maximum Motorsports C/C plates, SN95 BMR tubular A-arms, Aluminum driveshaft, LED's, 255 LPH 
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Jeff K Offline
Administrator
#4
Boost is a function of exhaust flow, which, in turn, is a function of engine load. Even with large throttle openings, load is relatively low in 1st gear, making the turbo spool slower. A good free flowing exhaust system with a straight thru muffler will significantly imrpove spool up time.
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

347BIRD Offline
Member
#5
That makes perfect sense. I have stock dual exhaust that im planning on replacing . I have the down pipe from stinger in the trunk.Just waiting to buy the rest of the exhaust system. theyre kinda pricey
1988 Blk T-Bird, 5-spd, Raven int, 3G Alt, K&N conical, Boost controller, ported E6, ported and polished IHI @ 16 psi, 03 Cobra wheels, 255/40/17, 275/40/17, SN95 BBK lowering springs, SN95 Koni struts and shocks, Maximum Motorsports C/C plates, SN95 BMR tubular A-arms, Aluminum driveshaft, LED's, 255 LPH 
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