kernel

i already have everything in the sig. i am thinking of getting the slp cold air intake and then gut the MAF. does this sound like the best thing to do next?or should i save up for something bigger.

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1986 WS6 pontiac trans am
5.0 305 TPI V8
700R4 tranny w/transgo shift kit. borg warner wires,accel cap and rotr,delco plugs, K&N,KYB shocks,dynomax high flow cat,3"intermediate pipe,40 series flowmaster w/ 2 3" tailpipes.

"ponys can run but birds can fly"

[This message has been edited by kernel (edited August 11, 2001).]

james_fearn

how about suspension mods...

LCA=$105
Panhard=$100
SFC= <$200
STB=$180
Steering Brace=$45

James



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1985 Z-28, 350 TPI, T-Tops, edelbrock 6085 heads, ZZ4 cam, accel base/runners & 24 lb/hr inj., ported plenum, everything gasket matched, crane AFPR, SLP 1 5/8 headers, single 3" flowmaster catback, 3" Catco cat, modified tranny, 165 ECM & ARAP code, MSD 6AL/wires, edelbrock STB, Spohn SFC, GW "wonderbar"

smokin87iroc

i have to say headers. if you don't have to worry about being emmisions legal than you can get some for less than 200 bucks. if you want to stay emmisions legal then you will spend a little more than 200 bucks but its worth it. it'll wake up that 305 see what they did for me.
Andrew

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Andrew Peery
1987 IROC, 305 TPI, T5
Hooker Competition Ceramic Coated Headers, Flowmaster, Ported Plenum
All smog equipment gone and no cat
before headers
192hp and 265tq
15.20 @ 92.5 mph 2.4 60ft
After Headers
14.480 @ 95.01mph 2.194 60ft

90Iroc-Zee

You don't even really need the AIR. When I get headers for my next performance car I'm not getting them. Make sure you take your cats out tho then, because they will clog up because of the heat. It just keeps the headers cool, get the jet hot coated to retain most of the heat and you should be cool.

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1990 G92 5spd LB9 - 3.42 80,000 miles

Accel Ignition/Wires (8.8mm), Advanced Timing, TB Bypass, Ported and Gasket Matched Plenum, Synthetic Motor Oil, 160 Thermo, TPIS Airfoil, K&N Air Filters, Centerforce I Pressure Plate and Clutch, Edelbrock TES Headers, Dual Cats, Edelbrock RPM Series Catback, Homemade Ram Air, Bosch +4 Platinum Plugs

14.4 @ 94mph w/2.0622 60ft (w/o headers and catback)

14.426 @ 96.19mph w/2.167 60ft(w/headers and catback)

Also newly modded w/o track times:

Holley AFPR, Underdrive Pulleys, KYB Shocks and Struts, Crane Ignition

IROC5.7TPI

Don't gut the MAF. Its not worth it and will show no improvement.

I did mine before learning a few things about it. Most importantly...your stock TB won't flow as much as the ported MAF, so why bother? Also, it screws up the BLM at idle.



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Mike L.

The Weapon of Choice:
1987 IROC Z 5.7 TPI A4 3.27 Borg-Warner four wheel disc
Mods: 2300-2500 Stall Converter, Shift Kit(GM parts), TPI Specialties Stage 3 PROM, Modified Airbox w/ K&N's, homemade cold air, Relocated MAT sensor, Gutted MAF, 160* thermostat, MSD 6A, Accel 8mm Wires, bypassed TB coolant, Flowmaster 3 chamber single 3" in/out muffler, 3" MAC mandrel intermediate, custom dual !cat Y-pipe. airfoil, ported plenum. !smog, few others I forgot...???

**BOYCOTT LAPEER DRAGWAY**

The Man

I would do all the free mods first if you haven't done them yet(port plenum,coolant bypass,play around with the timing(6-10 degrees),170-180 therm,manual switch to turm fans on). I would buy a AFPR(tune with), and a set of Hooker shorts headers.They have 1 5/8 primaries, and 3" collectors. without the AIR tubes and Y-pipe you can find them from $75-120 used. If you bought them new it is around $140. I think there are some on EBAY right now for $75.Get a local muffler shop to make your Y-pipe(2.5"). Should cost less than $100(mine did). Try to find a Air Foil(used).

If you saved alittle, you can get a 2600stall Lock up converter for $300 at SLP. that would wake your car up(off the line)or if you have 2.73's, then you could get 3.42 or 3.73's for it.

If you want suspension mods(to hook), then I would get SPOHN LCA Brackets ($65)and LCA's(or box and bush you stock ones.its cheaper $40-55)

TAKE YOUR TIME AND YOU CAN FIND GOOD DEALS ON THIS BOARD.THEY ARE OUT THERE!

[This message has been edited by The Man (edited August 12, 2001).]

88IROCs

because a MAF with screens and fins will only flow around 550 cfm vs a stock 48mm TB which will flow around 700 cfm. Removing the screens will boost the MAF to around 650 cfm, and removing the fins will bring it to around 750 cfm. Removing the fins is a questionable mod though, as they are needed to cool-off the MAF electronics.

Kyle F

The main Problem with the Performance of the 86 TPIs was the damn cam in them. I would get a cam because without it your never goping to be fast. It has no lift or duration to really speak of. So if you cam dont allow the engine to breathe all the intake and exhaust mods in the world wont help!

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89 Trans Am Turbo 3.8L All stock 43,000 miles #1053 of 1555

Past Thirdgen:
86 Trans Am w/ built 355TPI with SLP goodies and too much other stuff to List. One sweet *** car, wish I would have had a good enough Job to pay insurance on three cars so I could keep it, but for a 89 Turbo Trans Am w/ Low miles, I think I made the right choice!

Iroc n roll

I'd forget about the SLP CAI kit. You have to relocate your battery to get it to fit. Also you could build a better one your self with some ducting for under $20 worth of parts. It sure beats $200, the rest of which could go to other mods that the rest of the guys suggested. The first mod I suggest for any Uni-body with plans for power is SFC's. I have seen way to many friends with tweaked frames, stress fractures, and popped T-tops. Also, listen to Kyle F. The 86 had the downgraded cam. If you want to go anywhere powerwise, plan on replacing it. Sorry for the novel, just my two cents.

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"Though I cruise through the valley of Rice I shall fear no turbo, for torque art with me."
--Cullan Hooley
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1985 IROC-Z w/T-tops, 305 out and 350 L98 TPI engine in, Hooker Super Comp Headers, 3" Hooker Super Comp Cat-Back, 3" CatCo Cat, Rebuilt TH700R4 with Shift kit, 2,800RPM Torque Converter, 3.73 Richmond gears, Auburn differential, Accell SuperCoil, Accell 8mm racing wires, BBK AFPR, Homemade Ram-Air (thanks to Andris Skulte), MAF screens removed, Dropped A/C, Dropped A.I.R, TB coolant bypass, Hurst Dual-Gate Shifter, SLP Air Foil, K&N filters, Holley performance fuel pump, Spohn Subframe Connectors, Re-located Spohn Lower Control arms, and more to come.

irocbsa

Yeah, the 86s had some PROM problems too.
bsa