Dan87IROC-Z

How much do you think it will help my 1/4 times? ------------------ 1987 Chevy Camaro IROC-Z L98 TPI 350 (5.7L) TH 700R-4 Transmission with 2.77:1 Rear End Current Mods: Edelbrock TES Headers, Hooker Cat-Back System, Performance Resource Chip with 160* Thermostat, Accel Ignition Components, K&N Filters, All Free Mods, Falken ZIEX Z-Rated Tires. Best ET: 14.3 @ 97mph

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evilho7810

With slicks about 1/2 a second.

fly89gta

with slicks you should break into the 13's

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89 GTA 350 TPI(L-98)Fiberglass "Daytona Turbo" hood K&N filter air foil Stage 2 Fastchip B&M Stage 2 shift kit Flowtech shorty headers SLP 3'' exhaust Cams HI-6S igntion with PS-91 coil MacEwen white gauges overlay's SLP rear sway bar Koni's all around and one kick *** stereo!

Rice....it's whats for dinner
You can see a pic of it by going here:
http://www.hometown.aol.com/clarkemustgonow

Jeffro89formula350

I put 3.70 gears in my 9 bolt and I gained almost nothing in the 1/4. It was hotter outside that trip to the track though.

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89 Formula 350
Rebuilt suspension, Aluminum Driveshaft, 3.70 gears
T56 siting in my garage till next months swap.
Best 1/4 mile - 15.08 bone stock.

Kevin91Z

Where do you get 3.70 gears from?
www.drivetrainspecialists.com ?

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

Dan87IROC-Z

You get the SLP 3.70s from SLP.

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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 Headers, Hooker Cat-Back System, Performance Resource Chip with 160* Thermostat, Accel Ignition Components, K&N Filters, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET: 14.3 @ 97mph

Jeffro89formula350

I got mine from randy's ring and pinion. try finding the posi unit thought. that took some work... I had 2.77 at the begining..

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89 Formula 350
Rebuilt suspension, Aluminum Driveshaft, 3.70 gears
T56 siting in my garage till next months swap.
Best 1/4 mile - 15.08 bone stock.

Bob R

If you have 2:77's in your ride you are going to have to change carriers too for a change-over to 3:70's. That means $$$$$$ Try to buy a whole rear end setup with 3:xx series gears in it. It's alot cheaper. I did it !



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Bob R
(ROCN-Z)
89 IROC L98

Biochem

I swapped in a 9-bolt 3.27 for my origional 3.23 open 10-bolt. It was rather straight forward. I think you can get a ring spacer, but that also might be for 10-bolts only. If you could find a locker or spool for a 9-bolt (I have never seen one), then that would be an alternative to finding a new (or slightly used) posi... good luck finding any of those though.

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1984 z28 w/ a 357 cu in. monster engine which is looking like the posterchild for Edelbrock... all the suspension stuff... 9-bolt posi disk is in... K&N filter... 93 octane...

I got the GO... I need the SHOW... Interior is next!

Kevin91Z

I found the 3.70's on DTS too, but thats all they had. I have 3.45's now, but my posi could be going out. I know I can shim it, but who sells the posi unit? Borg Warner in Australia?

Dan87IROC-Z

Where would I get a new carrier anyway? And what on Earth is a carrier?

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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 Headers, Hooker Cat-Back System, Performance Resource Chip with 160* Thermostat, Accel Ignition Components, K&N Filters, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET: 14.3 @ 97mph

branz28

So umm, me and dan are kinda screwed when it comes to swapping out our 2.77's for something nicer...(i mean screwed as in, just pop some new 3.45's in <-- that's what i want, and go...)

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89 IROC-Z 350 TPI

-Flowmaster Catback
-Performance Resource Chip
-Rebuilt 700R4 Tranny
With the goodies to go

-K&N Airfilters
-Ported Plenum
-2.77 Gears (not much to brag about but eh, its there)

Brad

With the cheap prices on ten bolt rear ends, it really makes more sense to buy a whole rear rather than just the gears for the 9 bolt. Granted, the 9 bolt is a bit stronger, but it still would not stand up to any REAL level of power.

Just as an example, I have a 10 bolt 3.23 posi rear end from a 97 Z28 that I got for 150 dollars whole, in perfect condition. I don't have it in yet since I have to get fourth gen wheels first, but those 17" SS wheels are lookin mighty tempting .

Craig Moates

If anyone's got some spare 3.27 9-bolt gears, I'd be interested since I'm also running the 2.77's. If you know of any, please let me know!
-Craig