86IROCTHD

hey guys what are yall running in the 1/4 mile and what do yall have done, and what gears. i have a 305 with the 2030 compucam in it and i am hittin a 15.2 with 2.73 gears and i just got a stage 4 chip. and the chip helped out alot over the stock one. so i am thinkin about a 14.9 or 14.8 but what gears should i get. i just bought a borg warner posi rear end and i nee gears so what should i get? please help

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it doesnt matter if u win by an inch or a mile winning is winning

RW91B4C

Stick or auto?
auto - 3.42
stick - 3.73
For mods look in my sig

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91 B4C 305 TPI - SOON TO BE 383
TREMEC 5-SP, STOCK 1-BOLT REAREAND w/342 GEARS, K&N, AIRFOIL
EDELBROCK HEADERS, DUAL CAT TO HOMEMADE Y-PIPE & 3.5" SINGLE PIPE W/ FLOWMASTER, CRANK PULLEY, MSD, FUEL PRESS REG, COWL HOOD, WELD WHEELS
14.1@ 98MPH
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OTHER RIDE
67 CAMARO - STREET CAR, BIG BLOCK, PUMP GAS
350TH w/ATI 10", 12-BOLT w/373 GEARS
10.92@125.2 1.55 60FT. ON MOTOR - ET-STREETs w/MUFFLERS

smokin87iroc

well i'm runnin consistant 14.7 @ 95 with 2.4 60ft but have ran a 14.48 @ 95 with a 2.19 60 ft with the mods in my sig. i put a new clutch in and now i just spin through 1st and into 2nd. i'm on 3.08 gears. i was thinking about 3.73's but they really are too steep for a stock cammed 305. i'm not sure about your cam but i can say that 3.42 gears would make you happy. if you are makin good hp up to 5000 or more rpm you might consider 3.73 but remember you will have a harder time sticking a launch.
Andrew
p.s. all my times have been run on z-rated street tires.

smokin87iroc

forgot sig

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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

Drkhrse89

iTrader: (1)

Isnt the BW rear a 9 bolt. If so have fun finding gears. My friend has a BW 9 bolt and went to swap the gears and he said everything was discontinued or really freaking expensive. You would be better off building up a ten bolt or finding a 4th gen rear and swapping that in there. I am not sure what I am running in the 1/4 since I have only run 1/8 mile. And I ran that in 9.9@75mph sorry dont remember what 60' or anything like that. My mods are high flo cat, mandrel bent 2 3/4" exhaust to magna flo muffler, pulleys, typical tune up (8.8 wires etc) lowered but I doubt that would help at all. I have 3.08 and a 5 speed 305 TPI.

86IROCTHD

cool thanks for all the help i thin i am gonna get 3.42's. and i am runnin 9.8's in the 1/8 with the 2.73's, but with the new chip i think i am about 14.7 or so. but sad to say after tonight i am not racing on the streets anymore. me and my friend raced and were chaced by cops..... and well i got away and he didnt $1500 worth of tickets plus alot of harassment. so i dont know but gonna get the 3.42's they run 325 from randy's ring and pinion. they are found in tha back of any chevy h/p mag.

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305, TPI,compucam 2030 cam, air foil, 8.8 wires, accel super coil, dynomax headers, custom y-pipe, cut out, 80 series flowmaster, 2.73's and an open diff(3.42-3.73 on the way). and a stage 4 chip :0). hittin a sad 15.2 before the chip.

Mista

I just happen to get lucky.......The former owner had tranny replaced in 1991 by GM and it happen to get a vette convertor with 2100-2200 stall.

See my sig.....I did buy a 3.27 BW rear to swap in. Also have to get rid of the 15 year old factory exhaust. 107K miles and the exhaust is still factory VAN NUYS spec.

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86 T/A 5.0 A4 & 2.77 gear
15.62 @ 86 mph
93 Civic 1.6L
13.5 @ 100 mph

86IROCTHD

cool well i went to the races and my car i think is runnin bout a 14.7 so i am happy, but i am gonna get the 3.42's to help save gas :P but thanks for all the help

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305, TPI,compucam 2030 cam, air foil, 8.8 wires, accel super coil, dynomax headers, custom y-pipe, cut out, 80 series flowmaster, 2.73's and an open diff(3.42-3.73 on the way). and a stage 4 chip :0). hittin a sad 15.2 before the chip.

JohnnyIroc

iTrader: (3)

all of my times are in my sig. and it is very easy to get a 305 into the low 14's with the right gearing and everything. good luck

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88 IROC-Z 350 TPI 5 speed
Performance Resource Chip, Flowmaster American Thunder cat back exhaust, B&M Ripper shifter, MSD coil, TB bypass, TPIS MAT relocation kit , AC Delco 160* t-stat, Richmond 3.73 gears, March Power & Amp pullies, Home made Ram Air, Steve Spohn SFC's, LCA's, and LCA relocation brackets , Panhard bar, TPIS AFPR, Ported plenum by Daniel Burk, Mac Test pipe
Best et: 14.232(all times with 305)
Best mph: 97.76
Best 60': 2.063
http://hometown.aol.com/famioso15/johnnyiroc.html

MILT

Best time around 13.9x, although it was someone else that put it there...

MILT

Rob P

iTrader: (1)

1992 Z28 convt, 305TPI 5spd, 3:08 posi rear, 235 Eagle GA tires. Aluminum drive shaft, TB bypass, ported intake, plenum and runners.
14.21@ 96mph.
Maryland Intl Raceway, sealevel, great weather.

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Rob P
89RSconvtZZ4TPI Edelbrock Intake
SLP Dual Cold Air Intake 1 5/8" Headers Semi-Siamesed Runners, IROC
suspension, alum shaft. Numerous mods.
92Z28convt5spd (stock)
71Impala convt 402BB
BETTER DRIVING THRU SUPERIOR HORSEPOWER!

bjankuski

My times and mods are in my sig.

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1988 Formula 5L/5sp 3.45 gears, SLP cold air kit, MAS gutted, TPIS air foil, TPIS AFPR, MAC headers, Mac under drive pulleys, MAC cat back, Relocated MAT.
Best ET street tires 13.85
Best 60 FT street tires 1.930
Best MPH street tires 99.29

CamuMan

hey rob p, where did you get the aluminum drive shaft and how much did it set you back?

[This message has been edited by CamuMan (edited August 20, 2001).]

85transamtpi

My Bone stock 85 LB9 with the bw 3.27 rear runs 15.0 @ 91.5. Ill bet I could get a high 14 run, but my trans was failing at the track...since been rebuilt. I would guess with a cam and chip low 14's wouldnt be strange with MY gear.
hope this helps.
doug

mypontiac

Would you think that adding a supercharger might help out?? Or would this be worth the added cash?

Seems like a good choice for the 305 for the ease of installation and hp addition.

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Sean

1977 S/E TA
1980 Conv. Turbo TA
1989 TTA
1991 Conv. TA

86IROCTHD

yes it would BUT i havent seen anyone make a supercharger set up for the 86 cause it does have mass air.

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305, TPI,compucam 2030 cam, air foil, 8.8 wires, accel super coil, dynomax headers, custom y-pipe, cut out, 80 series flowmaster, 2.73's and an open diff(3.42-3.73 on the way). and a stage 4 chip :0). hittin a sad 15.2 before the chip.

redhottlb9

<~~~ 14.895@92.56MPH w/ a 2.212 60'
car running at 220*,A/C on,cooling fans both on,spinning through first 20' and i hit 4th gear before the traps.....
plus intake was hot as hell,i had just driven
3 1/2 hours in bumper to bumper traffic on a 95* day.....engine has 113k miles on it,as does the tranny....
check my homepage for specs/mods

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The "House" has spoken...
check out my my 88 WS6 Trans Am

We are the seeds of legends,our true origins are unknown...WE SIMPLY ARE...

Beast5spdGTA

my new best is 15.11 @ 93.65 mph,(bad driving, good mph at least i think so)
Car 1989 305 T5 GTA
Mods:
AL driveshaft, highflow cat, edelbrock headers(gained 3+ mph),ported plenum, flowmaster muffler/stock int. pipe(2.5"),coolant by-pass, air filter in place of stock canister. 3.42 gears '96 rearend.

What rpms do you guys shift at I've started going through the traps in 4th, used to do 3rd at 90+mph. I've tried shifting at 5400-5500 and also at 5000-4900 with similar results.

Casey'91Z28

In the sig. with 2.73 gears.

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1991 Z28 305 auto, homemade CAI, air foil, power pulleys, ported plenum, hypertech chip, hooker cat back, kyb shocks, PF brake pads, STB, SLP headers, 3" catco cat, spohn lca's, 4th gen 5 star wheels, 14.687@ 96.449 mph

new87

In the sig with 2.73's with a 2.01 60'.

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87 Z28 305 TPI, Auto, LT-1 cam (@.50 418/430, 194/199, LSA 111), roller timing set, 2.73, Gutted air boxes, K & N fillters, Dyno Max 3" cat back, 8.8 mm spirals, air foil, BFG Drag radials,170* Stat and TB bypass.
Old Best 15.414 @ 87.47.
new best 15.006 @ 89.55.
w/ drag radails 14.6 @ 93
“Fallen But Not Forgotten”

Jono

15.201 @ 91.64mph /w 2.38 60 ft

ZPI28

I have 1/8th mile times in sig. best 60ft is 2.12 at 74.04mph. with 2.73 gears.9.47 ran again this past Sunday at GeorgeRays Wildcat Dragstrip in Paragould,AR.

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91 Z28 305 TPI
single 3"flowmaster
ported plenum,siemesed runners,
gutted airbox,
160 robertshaw thermo
273 gears,auto
9.47 1/8th mile
on goodyear eagles

stevenmh

14.62 @ 93.4 w/ 2.23 60'

SLP cold air w/ K&N
TPIS MAF
TPIS 52mm TB w/ airfoil
Random Tech 2-1/2" cats
SLP 2OTL exhaust
Accel 300+ Coil
MSD wires/dist cap/rotor
Hypertech Streetrunner chip
Hypertech 160 t-stat and fan switch
TPIS adj fuel pressure regulator
March underdrive pulley
10 deg BTDC base timing
Firehawk SZ50 EP

Engine/tranny internally stock, never rebuilt w/ 127,000 miles.


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1989 Formula WS6 M5
2001 Trans Am WS6 A4

More info at website:
http://www.fbody.com/members/stevenmh

Dyno Don

iTrader: (7)

14.94 @ 92.00 mph stock TBI heads and ex. manifolds, Custom chip, 3:45 9-bolt Heater hose bypass, stock intake and runners and TB.
Cam:TRW 198/210 .450-.460 114 LSA
Ex.: Stock '85 IROC (3" cat)
178rwhp/290rwtq before cam change, I will try to get it dynoed again to see the diff.
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Chronologically challenged. But still kicking!
'92 CAMARO RS
305 TBI 5/spd (now TPI)
B4C Alt.
14.94-92.00 mph
'69 camaro-BB/Lenco,1050 dominators, /Pump Gas/no drugs 8.97-150+/3200lbs.
SoCal Thirdgen F-Bodies

[This message has been edited by Dyno Don (edited October 11, 2001).]

nice3rdgenz

when my car was a 305 it ran 15.1 with exhaust, pullies, and a fuel pressure regulator

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91z28 350tpi auto runs 14.3

okfoz

Ran a really disapointing 15.566 right after my TPI conversion. Since then Started buting my own chips and I can REALLY tell the difference. I am guessing around low low 15's I am hoping for high 14's.

Granted my reaction was 1.248 & my 60' was 2.237, so I imagine I could really benefit from some practice.

John

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G O D BLESS AMERICA
87 Formula Yellow/Black

5.1 TPI Automatic
Baer 12" brakes 4 wheels, KYB AGX Adjustable Shocks & struts, Custom Leather interior, WAAAY TOO MANY MODS TO LIST

87 Formula TPI (5 Speed) Yellow/Gray STOCK

1967 Buick Riviera 430hp Turns high 14's (Not bad for 4300 lbs)

83 Camaro
83 T/A

http://www.3rdgenformula.com

LBSZ28BLOWN

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Louis
Convertable
92 Z28 305tpi Auto
1/4 at 12.99 @ 109.07mph w/Paxton 10psi, Ram air mod,Water methanol inj.,52mm T/B,ASM Large tube runners, ported upper & lower intakes,AFPR,23# injectors,1.6 roller rockers,slp tri-y headers,3in. cat,3in. gale banks cat back system,3.42 gears,17x9 camaro SS wheels, 285x40x17 tires,and much more.
http://www.lbsz28blown.cz28.com

Ed Maher

Stock except ported plenum, dual cats and a cat back...
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Ed Maher - Moderator @ The TPI & Carb Boards
92 Z28 Convertible - Quasar blue / Tan top
305 TPI A4 2.73 - 14.74 @ 93.25
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

[This message has been edited by Ed Maher (edited October 13, 2001).]

IROCME

My best was a 14.71 ,I need 3;73's and headers thugh still,if I only had the money ,I hate being a **** poor college kid

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86 IROCZ 5.0 TPI/"new" 700R4 auto with transgo shift kit and vette servo,canary yellow,t-tops,radar detector,tan interior,hidden antenna,tinted windows,taillight blackouts,front end bra,k&n air filters,no cat,full 3" racing exhaust with 40 series flowmaster and chrome tips,2:73 posi rear(soon to be 3:42 or 3:73 posi),1989 IROCZ 16*8 polished aluminum rims

Beast5spdGTA

New time of 14.6 @ 96 mph. Where are the guys with the fast 305s, I saw one 12.98 with a blower. I know another guy posts with a 12 flat w/ a blower. isn't there also a guy running fast N/A 12.5 or 13.5 can't remember? I'm gonna set my goal to be 107 mph (mid 13s)in the 1/4 with a N/A 305 EFI(notice the TPI part missing=).

86IROCTHD

my goal is mid to low 13's n/a and i am putting on heads and 3.73 gears to get there.. so i will keep yall updated.... going to put in the posi with 3.08 dosc rear on monday wish me luck...

88 WS6 TransAm GTA

iTrader: (1)

Hey guys... my 92 T/A Conv. ran:
2.279 60'
9.642 1/8
14.944 @ 93.11 1/4
With the few mods listed below... thats the second run... I wont post the first due to me missin third!

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92' White Trans Am Convertible, 305 TPI, 5 spd. 2:73's, Edelbrock TES, Accell 8.8's, Hypertech Stage II, TPIS Air Foil, Ported Plenum, K&N TB Cone Filter, AFPR, & A Little Bit Of Attitude!

Best ET: 14.944 @ 93.11

88 Gunmetal GTA Hardtop... Project In The Works!

88 Black GTA, T-Tops, 305 TPI, 5spd... R.I.P. :*(

"GUYS, WE NEED A MUSTANG TO RACE... THERES ONE! HOLY **** SHES HOT! SHES NOT GONNA GO... NAH... HOLY SH*T SHES GOIN!"