Dan87IROC-Z

The times are corrected for elevation. My last trip to the track, I had the chip, headers, cat-back, free mods, tires, K&Ns, no ignition parts. Up at Bandimere Speedway in Colorado (6200 ft I think) I was running consistant 15.6s at 89.9 MPH.

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission with 2.77:1 Rear End

Current Mods: Edelbrock TES 1 5/8" Headers, Hooker 3" Aerochamber Cat-Back System, Performance Resource Chip with 160* Thermostat, Accel Ignition Coil, Cap, Rotor, 8.8mm Wires, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET : 14.32 @ 97.7mph
(corrected for elevation)

Soon to come: LT4 HOT Cam, Air Flow Research 190cc Heads, 2800 RPM Stall Converter and SLP 3.70 Rear End Gears.

AlkyIROC

Get some better tires for the strip. Z rated tires are not designed for drag racing.

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Stephen's racing page

87 IROC-Z Pro ET Bracket Race Car
383 stroker (carbed) with double hump cast iron heads and pump gas
454 Big Block buildup now in progress for the 2001 racing season

Best results before the 383 blew up
Best ET on a time slip: 11.857 altitude corrected to 11.163
Best MPH on a time slip: 117.87 altitude corrected to 126.10
Best 60 foot: 1.662

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car
91 454SS daily driver
95 Homebuilt Harley

ponyeater

my 88 305 tpi ran a 9.53 in the 1/8 on bald tires stock engine and only mods were a flowmaster muffler. since then i have installed a chip , new z rated dunlops, no cat,complete tranny rebuild with performance clutches and shift kit,went from 2.73 gears to 3.73 gears and a msd ignition 6a box. i should be in the 8.9 to 9.2 ball park . thats flyin for a 305

IROCZTWENTYGR8

iTrader: (1)

Better gears would do good for your car.

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Looking For:

87 IROC-Z 350 TPI
84 TRANS AM 305 H.O.

IROCZTWENTYGR8

iTrader: (1)

Double Post

[This message has been edited by IROCZTWENTYGR8 (edited December 11, 2000).]

IROCZTWENTYGR8

iTrader: (1)

Double Post

[This message has been edited by IROCZTWENTYGR8 (edited December 11, 2000).]

Dan87IROC-Z

I've looked into new gears, but they are freaking EXPENSIVE!!!! And my Z-rated tires hook up great, I have no traction problems.

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission with 2.77:1 Rear End

Current Mods: Edelbrock TES 1 5/8" Headers, Hooker 3" Aerochamber Cat-Back System, Performance Resource Chip with 160* Thermostat, Accel Ignition Coil, Cap, Rotor, 8.8mm Wires, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET : 14.32 @ 97.7mph
(corrected for elevation)

Soon to come: LT4 HOT Cam, Air Flow Research 190cc Heads, 2800 RPM Stall Converter and SLP 3.70 Rear End Gears.

dudelovett

For the gears, why not just head out to a scrap yard and look for an 83 to 86 Camaro/Firebird? Some of those came with 3.73's.

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1991 Firebird Formula, 305, TPI, Auto...stock till I get some money!!!
Former owner of an 88 2.8 Firebird....RIP

[This message has been edited by dudelovett (edited December 12, 2000).]

new87

Stock times in Sig, I got a hold of a complete 3.23 for $125, try a post in the classifieds.

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87 Z28 305 TPI, Auto, 2.73, Gutted air boxes, K & N fillters, Dyno Max 3" cat back, Accel 8.8 mm spirals, Accel cap and rotor, Accel coil, rapid fires, and 160 Stat.
Best 15.414 @ 87.47, 3.23 on the way!

IROCZZ3

Dan..those times aren't too bad for that elevation. I know what it's like to race at high altitudes. When I lived in Albuquerque (5000+ ft) stock LT1s were running mid to low 15s at a slightly higher mph than you.

You're corrected times sound accurate also. When I raced in El Paso (4000 ft) and San Diego (sea level) the difference was 8 tenths and 8 mph in the quarter with no other changes to the car.

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1989 IROC-Z, ZZ3 shortblock with some bolt-ons.
13.20 @ 108.69, 2.2 60'

Dan87IROC-Z

Thanks a lot guys, I'll check for a uses rear end.

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission with 2.77:1 Rear End

Current Mods: Edelbrock TES 1 5/8" Headers, Hooker 3" Aerochamber Cat-Back System, Performance Resource Chip with 160* Thermostat, Accel Ignition Coil, Cap, Rotor, 8.8mm Wires, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET : 14.32 @ 97.7mph
(corrected for elevation)

Soon to come: LT4 HOT Cam, Air Flow Research 190cc Heads, 2800 RPM Stall Converter and SLP 3.70 Rear End Gears.

Dan87IROC-Z

Anyone else have anything to say?

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission with 2.77:1 Rear End

Current Mods: Edelbrock TES 1 5/8" Headers, Hooker 3" Aerochamber Cat-Back System, Performance Resource Chip with 160* Thermostat, Accel Ignition Coil, Cap, Rotor, 8.8mm Wires, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET : 14.32 @ 97.7mph
(corrected for elevation)

Soon to come: LT4 HOT Cam, Air Flow Research 190cc Heads, 2800 RPM Stall Converter and SLP 3.70 Rear End Gears.

IROCKZE

Have you ditched any weight? A really nice mod is to use the aluminum front bumper impact bar off certain 4cyl and 84 Z-28 cars. There is a salvage yard in Greeley (Anderson's) that had several last time I was up there. I have not installed mine yet due to the amount of work but hope to have it on by Spring. BTW, my car ran a best of 16.2 (uncorrected) at Bandimere's last test & tune session in October. Traction was a real problem.

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85 IROC,5.0 TPI,T-Tops,fully loaded,black with red Lear-Siegler "Camaro" interior,Decal Delete,91 Bose stereo,Stage 2 Fastchip,AFPR,TB Airfoil,K&Ns,March pulleys,Alum. Driveshaft,92 police version 700r4

"The Devil drives a Camaro"

Basett Racing

Your street tires won't hook when you get 3.73's, so I would start thinking about either some drag radials or maybe just a set of slicks to bolt on at the track. That is a pretty descent timeslip ( the corrected time)for an engine w/ the minor mods you have. Some cars just run better stock than others, I had an 88 IROC w/ a TPI 305, that didn't run near as as fast as the 89 RS w/ a TBI 305 that I have now, so I think you got one of the faster stock cars. I guess that on mass produced, production engines, every now and then, some of them have truly optimum clearances. I can't tell you how many times I've pulled out stock engines for a rebuild, and found only .001" to .0015" main and rod clearances, or .004" to .006" end play, or rod side to side clearance so tight that each adjacent rod had turned blue due to the heat of a tight clearance. Very rarely does a stock engine have ALL the clearances correct, but some do, and those run better than the rest.

[This message has been edited by Basett Racing (edited December 19, 2000).]