Exactly what is the diffrence?



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GTA -89:Free flow muffler,dual 3" HF cats, Edelbrock headers, Vette heads, 1.52 RR 7/16, ZZ-9 cam, Big Mouth, AS&M LTB, ported plenum, 52 TB, MSD 6AL, TPIS level V prom, Mod .MAF, Superior shift-kit and some minor mods. and more to come!
http://www.itv.se/tacs/members_cars/m279/m279.html (Swedish Trans Am Club)

 

moving to tbi board, hopefully someone there can help.

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-=ICON MOTORSPORTS=-

 

why was this moved to the tbi board? isnt this pertaining to tpi throttle bodies?

 

No idea why it was moved to a TBI board...damn newbies.

Anyway, the only difference between 85-92 throttle bodies is (as far as I know) the linkage. GM changed the design of the tv cable, throttle cable, or something like that. I do know that later ones work on all motors...but earlier ones only work on earlier systems.

good luck,


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87 IROC-Z, 5.7, auto, 3.27, leather, !cat, Holley fpr, K&N'S, SLP 1-3/4" Jet-Hot coated headers, SLP .218/.224
.495/.502 cam, Comp 1.5 roller tip rockers, $uperPITAram, Edelbrock lower intake, Holley 52mm tb, Dynomax\
Flowmaster catback Coming Soon (?)- Fasttrack/Accell DFI

1989 Pontiac 20th Anniversary Turbo Trans Am - 160,000 miles, K&N filter

SOLD ->91 Z28, 5.7, 3.23, Ported Plenum, Accel runners & lower intake, Accel distributor module, !dual cats, POS Edelbrock catback, K&N'S, ram air, tb airfoil, !tb coolant

 

moving to the tpi board

 

Hahaha....

 

The main difference is the different style throttle cables for the 85-88 and the 89-92. The 89-92 T.B. uses a rotating cam design, similar to how a COMPOUND BOW is designed. The 85-88 T.B. uses a cable that attaches similar to how a carburator cable is attached. The 89-92 T.B. can be installed on an 85-88 plenum, but I don't remember if the obverse will work the same. BTW, the two different throttle cables are interchangeable between those years also. HTHs

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88 Monte SS 355 TPI/LT-4 HOT CAM/AFR Hydra-rev/ T-56 6-Speed

 

I accidentaly got installed an 88-92 TB on my 86 and I just had to rig a linkage with a screw to use the older style cable. I think I will be going to use the newer style cable sometime

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86 Trans Am 355 TPI Rebuilt 700R4 with Corvette servo, modified valve body, and a B&M Torque Converter (2000 rpm stall w/ lock up), 87 350 block bored .30 with new crank, bearings, rings, and magnafluxed rods. Reworked 305 heads with 3-angle valve job. Added in the rebuild was an SLP TPI cam, BBK 58mm Throttle Body,SVO 24# injectors,MSD 6A, Hypertech Power Coil, 1.5 Crane roller tipped rocker arms, SLP Intake Runners and Port matching in upper intake including fully ported plenum, TPIS adjustable fuel pressure regulator @ 46psi, Hooker shorty style headers w/ Thermotech heat wrapping, Custom 3” exhaust with Flowmaster muffler and chrome quad tips, Hypertech Thermomaster Computer chip, K&N open element cone filter on modified MAF per TPIS specs, MSD Wires, removal of A/C hardware and a 1LE firewall cover installed. Also there has been a PST front suspension kit with Hotchkis strut tower brace
http://geocities.com/SunsetStrip/Garage/9548/kyle.html

Kills:
95 Talon TSI, 96 Probe GT, 91 T/A L98, 89 RS, 86 Mustang GT, 88 Mustang LX 5.0, 92 Thunderbird V8. couple or ricers that I think were Civics or Preludes not sure what year, 95 Celica GT-S, 94 Chevy 1/4 ton 350, one of those NASCAR F150's

 

IAC passages are different too? Been awhile since I had my '89's off, but I'm almost sure that's the case.