I-Roc with my Z

Anyone know the stock 0-60 and 1/4 times for a 1989 Camaro 350 pref. a Iroc.

Pacer

I'd be curious to know too as I bought one of these recently ....

3.8TransAM

lol

this is to easy.

Go to the track :-)

Depending on the gears, mid low 14 area.(good gears)

mid to high 14 low 15 area with the bad gears

later
Jeremy

I-Roc with my Z

Any site I find has 88 then 90. Dont feel like driving 2 hours to the track.

89TPI350

0-60/ 6.5 sec.
1/4 mile- 14.5 sec.

89IrocZ350TPI

Here are a few from old test articles......

Iroc Z350 Without G92 pack. 230hp 330lb ft
350 2.77 gears
6.2
14.5@95

Iroc Z350 with G92 package 3.23 gears dual cats 240 hp 345 lb ft
5.9
14.5@95

Asdfga3

You got a link for that? R&T had the '87 rated at 15.3 w/3.27 gears.

Also, how do they figure that the higher ratio and dual cats equals better 0-60, but same ET and trap?

nick418

Another mag tested a 87 L98 14.5 at 95mph. Still depends on package/gears. Makes big diffrence. Or bird or maro. Birds are tad bit heavier. More luxury then a camaro which is more simple. A 89 Iroc L98 had the biggest cam out of any year. If it has a G92 with dual car packages. I think it can squeeze a 0-60 in 6 secs flat or bit lower with a 14.4 @ 95mph in perfect tune. Its funny how ppl get these 15.3 L98s brand new. They must be awful drivers. A 1990 Iroc L98 did 0-60 in 5.8 secs with the SD. A 91 Z28 L98 did a 1/4 mile in 14.3 secs. Depends on tune/driver/packge/gears

Asdfga3

Birds are also going to be a bit slower due to the intake being in the fenderwell, as opposed to being up top.

89IrocZ350TPI

The best ive ever seen a stock L98 run was 14.3@98. 92 L98 Trans Am.

urbanhunter44

iTrader: (3)

i'd expect 14.5ish@95ish on street tires, if it's in good tune. Get some real tires and some exhaust and you should hit a 13.9.

89IrocZ350TPI

13.9 with an L98 takes alot of bolt ons.

nick418

You are kidding, right..?

89IrocZ350TPI

Let me guess yours runs 13.9 stock

nick418

No 14.3. But your telling me it takes alot of bolt ons to make a l98 13.9? Also stock vette L98s will hit high 13s stock. Do a catback and tq converter youll be in the 13s with ease.

89IrocZ350TPI

It must depend on your car. Some are faster from the factory, some are slower. I ran 14.8 at 93 stock. After nearly full bolt ons I got a 13.5 at 99. [Stock heads,cam ect]. I got a few dyno sheets that show 247wrh, and 329rwt so I am hoping for better times come spring. I bet if your running 14.3 stock you could get 13's no problem.

nick418

I agree. L98s are very sensitive though. If you dont use that torque off the line correctly. Your going nowhere... What gears did you get? Do you have G92 with dual cats? Or you have the 2.77 gears? 89 was the first year for a dual cat option. In 91-92 L98s came on them standard with G92 and the 3.23 gears.

Asdfga3

It's all in the gears. Well not all, but most of it. 5.7 TPI's came with anywhere from 2.73 to 3.72 in the rear end.

nick418

where did you find this info on L98s coming 3.72s from the factory? Or do you mean 3.27s Also i dont think the l98s came with 2.73s. Only L03s and LG4 kind of cars.. L98s had 2.77s.

Asdfga3

Meant to say 3.73. Not sure how accurate this is:

http://www.teufert.net/camaro/1987.HTM

Has RPO codes ranging from 2.73 through 3.73.

nick418

No l98s came with 3.73s from factory. Thats to high of a gear for tpi anyways. Only 5 speed L69s/LG4s came 3.73s in certain packages.

89IrocZ350TPI

I had 2.77's which were not as bad as people think. I got a 13.8@97 with those. Now with the newer 3.42's i got it down .3 and picked up 2 mph.

TPI-Formula350-

will take alittle more then that. but if you want to prove me wrong do those two mods on your car and show us all the slips. Then I'll say your right. good luck with it.

TTOP350

iTrader: (8)

My 89 formula 350 ran 14.4 stock
un hook the knock sensor(they are junk)
jack base timing to 14-16 deg,
bump fuel psi 2 51 psi,
descreen MAF and mod the air box with a K&N
then run 13.5s ....

converter 3,500
shift kit
cam slp 510 510
1.6 comp rockers
ported base
160 t stat
very heavly ported SLP runners
SLP underdrive crank pully
1 3/4 SLP headers guted cats and cat back
run 12.70s with M&H RaceMaster tires

stock control arms boxd and pollyd
stock tq arm
SLP cold air kit
add trickflow heads
24lbs motorsport ijs (just had some go bad so i upgraded 2 these cheap)
stock 3.27 gears
no front sway bar

run 12.20s M&H tires

no prom work

nick418

Go look up a member Orr89rocz. He did a tq converter, headers and a catback and a suspension mod or two. He runs high 13s easily with his old 2.77 gears. Also look up some L98 vettes. Do full exhaust and some good gears with free mods. Easy mid 13s for vettes.

TPI-Formula350-

U said just u could do it with catback and conv. I know an L98 can run 13's with boltons. I've ran 13.21@104.63. I was just saying its gonna take more the catback to do it.....

nick418

For a corvette l98 it can run stock 13s. Put a full exhaust. bang 2 tenths of sec will knock off. For a fbody. Yes you need more then a catback do it. The vette came with better heads and it was 3100lbs vs a fbody which 3500... So a L98 still has potential. The above comment sounded like you need a hell of alot of bolt ons to touch 13s.. My bad. Internet is very confusing at times

89IrocZ350TPI

If your running high 14's stock it will take alot of bolt ons to shave off a full second and get a 13.9. If your running low 14's stock it will be alot easier.


TPI-Formula350- What did you run when you were stock?

BigWhiteGTP

Not trying to be a jerk, but that doesn't sound like a good idea. I mean, wouldn't you want to at least put in a new K-sensor when bumping up the timing like that? Wouldn't the motor detonate eventually?

Stevo

iTrader: (45)

13.9...almost untouched car...dont tell me its not possible. I have 3.23s btw.

mods in sig.

You have to know how to launch a car...its everything on an auto and a street tires.

89IrocZ350TPI

Very good times. The 90-92 L98s were the quickest running 14.3's from the factory. So I believe if your car is in tune with those mods listed you could get that 13.9. How many miles on your car did I see 122K. Damn

Asdfga3

Okay, I did misspeak when I said it was all in the gears. Not all L98's are created equal.

Stevo

iTrader: (45)

Car had 121k i think when it was ran...the car was babyied its whole life till i got it at 101k miles. Beat the **** outta the car sence...When i did get it though i did a complete tune up, front end rebuild, everything fluid changed/serviced. It runs like new cept all the rattles...

89IrocZ350TPI

I see you ran street tires at the track. Did you have any traction problems? Get some radials and run 13.7's

TTOP350

iTrader: (8)

You'll hear it rattle way b4 the sensor will ( they mostly pickup vavetrain noise anyway)..
if you hear it rattle back out and drop the timming a deg or 2 then test again.. this can be done on the street..
OLD SCHOOL TUNNING LOL

I havent had a junk sensor plugged in since 91

and no motors I work on leave with 1 pluged in

1BADROC

iTrader: (1)

ive noticed on most posts when everyone talks about 1/4 mile times no one takes in mind the altittude. where i race in bristol a stock l98 will run 15.3 with hsr and headers it will run 14.5 thats almost a full second so with 2 bolt ons its possible to gain a full second. if you run a 13.2at sea level here you will run about a 13.9 to 14.2 so you cant really predict what a car will run stock or not if you dont know the altittude.