ORVette

Well, it still won't do a smokey burnout, but it sure pulls harder. I have 275/60/15's on the rear, so I guess I'll have to either get skinnier tires or more horsepower. When you nail it, it really digs and chirps, and the 1-2 chirp is now a real SQWAWK! Still have to figure out which speedo gear to use, but I guess I can go off the tach for a while. Whenever I get the ambition to pull the trans and change the front seal, I'll probably change out the torque converter to something that stalls around 2000. Can't wait to get a sunny day and really go get a good test drive in.

Paul Borowski

I did an opposite swap last year to my '68, but I'm more into 75-90mph "long distance cruisin" :yesnod:
Probably could have swapped "whole rears", but the shipping would've killed us :lol:
http://www.corvetteforum.net/c3/anth...arendparts.jpg




[Modified by Paul Borowski, 5:01 PM 1/11/2002]

PatsLs1vette

when you figure the speedo gear out let me know i did the same thing 3.08 to 3.70 and havent changed the gear yet...

TeenagerWith74Vette

So how much will it help? I think I have some 4.11's on the way. I'm going from 3.36s (wanna buy the chunk?). I'm running 13.1 1/4 mile right now. Will it get me a 12.5?
Thanks,
Jay

QuickVet

sometimes the higher gears make the quarter mile worse :( depends on the motor:)

TeenagerWith74Vette

QuikVet-


It's a 350 10.5 to 1 comp.
Eagle Rods
Keith Black Pistons
Dart Pro 1 Heads 215cc 2.08 1.60
Air Gap Intake the 6500+ RPM one
750 Holley Vac. Secondaries All the tricks
Extreme Energy 284H Cam
Harland Sharp 1.6 rockers
3000 B&M stall
Ceramic Coated Headers
Dual Flowmasters
Header cutouts
MSD Billet Dist.
MSD 6AL
17 and paid for it ALL!

How much do yall think it will help? It always seemed to fall on its face when I shifted into 3rd (95mph 7000RPM)

L79vette

The rule of thum is 0.1 ET for every 0.2 of extra gear. So expect about 0.35-0.4 on the ET. Good Luck.

Bob Turner

Congrats!!!! I am glad you are happy!!! Have fun. Now for your Big Block project..... :cool:


Bob

DeenHylton

Teenager, dump the hydraulic cam for a solid lifter with more duration or go full tilt with a solid roller. I'm surprised you haven't floated your valve train at 7,000 RPM...your asking for trouble with hydraulics past 6,500. You'll definetly be able to use more cam with your 4:11's and I'd say your under cammed now for the heads your running. :yesnod:

gkull

TeenagerWith74Vette - What do you mean by fall on it's face? If it's the 2-3 gear change being so great that the rpm drop put's you out of your motor power band then 4.11 will help you.

4.11 limit's you to only 125-130 mph depending on tire size with 7000 rpm. In a 1/4 mile car it's almost what you want. On a street car it would suck without OD. My car slowed down in the quarter when I went to 4.11 unless you run good 9 or 10 inch slicks. Street tires just smoke all through first

Ganey

ORVette

Go up at least one step on the cam. 2 steps rec. to XE262.

ORVette

Thanks Ganey,
I've been searching your old replies trying to figure out how to go on that. I've got a fresh rebuilt valvetrain with .510 springs, so I'd like to give the XE262 a try. Might take me a couple months to get the energy for another project, but then again it might not :chevy .


Thanks again Bob,
Rear is tight and quiet. Very, very happy!

GTR1999

Did you do the swap or have a shop do it? Just curious what procedures you followed if you did it.
Gary

TeenagerWith74Vette

Well, I will try the new gears as soon as I get them. I should be getting them from a fellow forum member soon. I can't wait. I would love to run some mid 12's.
Jay

ORVette

gtr,
I bought the whole carrier assembly. I've never set-up a ring and pinion. If you mean did I swap carriers, yeah. It's not too hard, just time consuming, and a little heavy.

GTR1999

Thanks but yeah I was intrested in if you rebuild it. I'm planning on doing the ears in both of my cars myself, so I was just gathering information from different sources.
Thanks anyway,
Gary