What gearing are you running?

I am running whatever came in the tranny. But I would think folks with these five hundred horse monsters would be real unhappy with the gearing. I would think they would want a slightly higher axle ratio, like maybe 3.73 or so, and a wider gear set. That will stille wind up with a low first and even higher fith. With 500 ponies it would feel right and be able to approach the 200 MPH barrier.

Amen..

I'm running 3:43 in my viper with a Six Speed.
Gotta say - Thats PERFECT. Can Idle at 80 in 6th.


However, I wouldn't take either to 200.
Thats what airplanes are for.

lol

Is anyone running non-stock gearing in thier Pantera. Has anyone done a non-stock ring and pinion? There is a 4.6 and a 5.35 ratio available.
The Ford GT40 is listed as 2.42/1.47/1.09/.96/.86 with a 4.22 rear.
It did the 1/4 in 14.2@100mph with a top speed of 164mph @ 6900rpm.
Dry weight was 2060 lbs and test weight was 2230 lbs.
I'm sure that the team GT40 race cars were geared custom for specific race tracks.
I don't think the stock Pantera engine would have the power to reach 200 if the ratio was dropped down, even though theoretically it could and you would need less rpm.
The nose of the Pantera gets very light over 150. It is a place that you should not visit too often without devine favor. Why try?

I found a useful tool on the Quaife web-site.
Excellent for seeing what effect different ratios have on the speed in each gear.

It's freeware so I can email anyone a copy if they want it.

I still running a standard 4.22, I'm going to change it as soon as I can afford it.
It's a lot of $$$ to ship a ZF to california from the UK.

I'm going to get some quotes from Butfoy today if I can reach them.
It may be cheaper to change the "gear set" at $900 then to do a ring and pinion at $3900, maybe.
The question is first gear. 2.23 is too high. The 2.58 first gear would be better.
Third gear is wrong at 1.04. It should be the 1.14 or as high as you can get it.
Fourth gear is wrong at .86. It should be around 1.
And last but not least 5th is wrong at .7. It should be around .85.
One could go two ways. Either run a 4.6 or run a different gear set.
I'm surprized the '40s first gear wasn't higher. I suppose because the car is so light they could get away with that.
Unfortunately the Pantera is 800 pounds heavier. It needs better launching capabilaty.

I'M located in Essex, UK. and have been re building ZF's for quite a few years, can I be of any help to you?paul@flemingpaul.wanadoo.co.uk

Thank you for your offer. The cost of the parts for the ZF is the issue really.
When a ring and pinion costs $2500, it kinda' takes the likeliness of experimentation out of my hands, or wallet.
I'm going to have to suffer with my 4.22's I'm affraid.

quote:

Originally posted by PaulF:
I'M located in Essex, UK. and have been re building ZF's for quite a few years, can I be of any help to you?paul@flemingpaul.wanadoo.co.uk

Hi - does the DTDC know that you exist?
If not I expect they would very much like to hear about you.
Trying to find someone in the UK that can do this work is not easy, and there you are less than a hundred miles away!
Do you have a web site or a price list?

quote:

Originally posted by Rapier:
I found a useful tool on the Quaife web-site.
Excellent for seeing what effect different ratios have on the speed in each gear.

It's freeware so I can email anyone a copy if they want it.

I still running a standard 4.22, I'm going to change it as soon as I can afford it.
It's a lot of $$$ to ship a ZF to california from the UK.

Your mate from the U.K.

Could I have a copy of that?

If I zip it up and email it to you would you know how to unzip (sorry I don't know how techie you are with PCs)

If so let me have your email address - don't just paste it in (beware the spammers).

I'm sure it would not be a problem, but, for safety you can email to memmoustafa@yahoo.co.uk.

Thanks.

E mail me and I'll give you a contact number

There is a Cleveland engined GT5S for sale in the UK using 3.77 rear end.