I have a very stock 70ss 396, it has the cam for the 454, thats it, the rest is as stock as the day it came off the line. The tires are the polyglas f-70's. I bought one of those gtech performance meters, it gives you 1/4 mile 0-60 hp and a couple of other stats. It was $45.00 on ebay so I figured I would try it. Ran a 7.4 0-60 time and a 15.4 1/4 mile at 102mph. the 102 really sounds off but I figure the 1/4 is pretty close.
I would like to get it in the high 13's for respectablity, I have better tires that I will be putting on,the car has a 3.31 open end rear.I was thinking of putting in a 3.73 with a posi unit. Ya think that will do it. I get a ton of wheel slip if I stab the pedal, and I have the new tires to change it.
I want more performance but do not want to modify the look of the car in the engine.

Thanks for any help

Brian,I've done some testing at the track with a Gtech vs. a timeslip..I've had the gtech anywhere from one tenth to 4 tenths off..example: the gtech said a 12.89 and I ran a 13.20..MPH is usually reads 10 MPH higher than the timeslip.
All in all,not a bad "toy"..I've used the 0-60 feature to practice launching,and the 0-60 isn't far off,compared to taking 1/8 mile ET/MPH formula for calculating 0-60..my car does 0-60 anyhere from 4.24-4.77 at the track via the formula and the gtech reads 4.37-4.87
I've also used it tuning the vacuum secondaries on a friends 69 SS,and it worked out well.

It all really depends on whether you want to start modifying your stock motor. There are all kinds of things you can do to start whittling your time down, but what is your intention, or goal, with the car? Keep it stock, keep it looking stock, street, street/strip, etc.?

I would put the better tires on it and run it at the track first. This will give you a baseline that you can build on. Gears don't add as much as people think, especially on a stock car. My guess is that they would be good for 2-3 tenths. A stock motor and converter will probably hook OK with just good tires, even with no posi. I had a basicly stock 396 in my chevelle(small cam with little lope that I never knew the specs on). It ran 14.7@94mph. It had 3:31 no posi,performer intake,stock converter, street radials and a 2.5 inch exhaust. I put drag radials,LS-6 cam, headers, 2500stall and a performer rpm and it ran 13.8s @98 with the same 3:31 gear and still no posi.

Brian, I have an idea. Take the 396 out and give it to a friend of yours that owns a certain Nova. :rolleyes: It's much lighter and has better gears.

Seriously, what's holding you back is tires and gears.

Imchefbrian, The G-Tech early model is very inaccurate. So much so as to be unusable. Go to the strip for your Quarter Mile accurate times and pass the G-Tech off to someone else but tell them it's crap. I gave mine away but told him not to rely on anything he saw on it.

Orange 72 nova, hum
I think i'll keep it. although the color of the block would match the paint tongue.gif
What's up, Give me a call this week

Originally posted by Harold Sutton:
Imchefbrian, The G-Tech early model is very inaccurate. So much so as to be unusable. Go to the strip for your Quarter Mile accurate times and pass the G-Tech off to someone else but tell them it's crap. I gave mine away but told him not to rely on anything he saw on it. I have to somewhat disagree. If you are careful to set the thing up correctly and do so each time to eliminate variables the G-Tech is pretty consistent. Note, I said "consistant" not "acccurate". The one I used was consistantly off on the ET by .4 or .5. After having run it in the car at the track to make a real world comparison we were then able to use the G-Tech and just compensate the provided ETs appropriately.

The MPH is way off, it even says so in the instruction book that comes with the unit. For a cheap quick validation tool to determine if modifications or tuning has had a positive affect, the G-Tech is useful.

http://www.susanharding.com/ss454/GTECH1.jpg

You can decided for yourself how accurate it can be. A lot depends on how well its setup and the roads you test it on. Even if its off a tenth or two, hopefully its off consistantly, because the G-tech is a cheap way to measure improvements.