89IROCZZ4

Mine shifts at 5300 by itself, and all I hear about is how the tpi falls off the face of the earth at 4400 rpm. Does this mean mine has been ported or something? To my knowledge, the tpi setup under my hood I have is totally stock (ie no porting whatsoever).

IROCKER

Mine shifts about the same at WOT...give or take a couple RPM's. I only notice the weakness of the TPI system when doing the 1/4 mile, when it's in 3rd gear and hits the mid to upper 4000 RPM range. Then I can definately tell a difference in how hard the car pulls. First and second gears are no the same, at least not on my car.



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1987 Camaro IROC-Z
350 TPI (L98), HyperTech Airfoil, K&N Filters and modified airboxes, AC Delco RapidFires, Taylor SpiroPro 8mm wires, Energy Suspension polyurethane bushings for front and rear LCAs and sway bars, KYB struts and shocks, BFG g-Force Z-rated tires, MAC STB, MAC SFCs, JET low temp stat, CarSound Hi-flow Cat, 3" Mandrel-bent pipes, Flowmaster muffler, Corvette Servo, TransGo Shift Kit, Corvette 2000 Stall, TruCool LPD tranny cooler, T-tops.

2001 Sunfire GT
2.4L, 5-speed, K&N cone filter, interior detailing, 200W Monsoon Sound System (8 speakers), Silver Metallic exterior with grey interior.

Web: http://www.angelfire.com/on3/whitelightening

Ed Maher

Mine winds to an INDICATED 5-5200 on both shifts. Actual shift RPM is 2-300 lower due to tach error and tach latency (verified on diacom)
Shift RPM is PURELY a function of governor in the tranny, it doesn't mean your car has mod 1 on it. Yes over the years, more than a few people have found better ETs by swapping out to a governor that let them shift earlier keeping it in the powerband.

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Ed Maher - Moderator @ The TPI & Carb Boards
92 Z28 Convertible - Quasar blue / Tan top
305 TPI A4 2.73 - 14.7 @ 93.6
Stock except ported plenum and dual cats
-=ICON Motorsports=-

- Definitely prototypes, high powered mutants of some kind. Too weird to live, too cool to die

breathment

mine for some reason seems to pull right on up to 5000-5300 (where it shifts) i got i ported over the weekend and it seems to pull even harder then before. maybe i just think its making power when its not, i do know that today it shifted at like 3700 at half throttle, when i wanted it to shift harder, and when it shifted into 2nd it was like my car hit a thousand foam pillows, but i never changed the throttle position, then i let it climb and it started pulling hard again. stupid tranny.

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- David
88' GTA 5.7L TPI MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT, Flowmaster 80 Series

http://www.geocities.com/david_angel_16

Bird_of_Prey

mine shifts by it's self at 5200 in first 4800 in second.. and well.. third's at over 130 mph.. so usully i'm not at WOT by then.
but that's dash tach and i KNOW that it's off..
and i can make my engine go up to 6000 when i shift manually.. dosn't mean i make more power tho..


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87 formula
LB9, Automatic
K&N
3" mandrel bent exhaust,
v-force muffler
Hypertech preformance

IROCZ4BD3

iTrader: (4)

Mine makes power and shifts outta first at 6500,2nd at 5200 and I'm still in third going thru the traps.
BD3

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86 IROC mods:retro-fitted to a Comp Cams 210-215 499/499 112 roller cam,T.E.S.,Hooker Aerochamber catback
T.P.I.S. airfoil,Dan Burk ported intake system,,March
pulleys,Accel 8.8wires,ign.mod,Crane PS-91 coil,Crane HI-6S ign.box
RAM AIR induction,gutted MAF,
B&M shift kit,3.73 rear gears,Accel afpr,Hypertech stage 2 chip,Random Tech.cat.,Lakewood lower control arms,Lakewood adj.panhard rod,mac subframe connectors,PST polygraphite bushings 14.281 @ 95.45 2.004 60' on street tires
"The more I learn about women,the more
time & money I spend on my IROC"