Gear ratios on a 500

[chris1972]

TV8 said:

How comes please?

Its a twin turbo charged monster...

[Discopotatoes]

TV8 said:

Discopotatoes said:

Just to stick the boot in! I get 90 mph at 3000 rpm ( on track of course) and 70 at 2100 rpm

How comes please?

18" wheels and a 3.08 diff

[TV8]

chris1972 said:

Its a twin turbo charged monster...

Mine has a few extra of those torque things but it still seems to do lots of revs at 80!

[chris1972]

I'm gonna check mine... next time I'm on the track. I have 18" rears.

[SILICONEKID343HP]

TV8 said:

How comes please?

If you have a BTR you can change the crown wheel and pinion to a 3.08 , you may need to have around 270hp or it may not pick up so quick .

I`m still waiting for discopatoes to make be a set of brackets so I can get rid of the GKN and fit the BTR 3.08

[Discopotatoes]

SILICONEKID343HP said:

TV8 said:

How comes please?

If you have a BTR you can change the crown wheel and pinion to a 308 , you may need to have around 270hp or it may not pick up so quick .

I`m still waiting for discopatoes to make be a set of brackets so I can get rid of the GKN and fit the BTR 308.

Daz you need to speak to Kieth woods over on face book he did the brackets

[SILICONEKID343HP]

Discopotatoes said:

Daz you need to speak to Kieth woods over on face book he did the brackets

Mailed him cheers

[TV8]

Is the BTR308 a rare TVR part or a more generic one please?

[SILICONEKID343HP]

TV8 said:

Is the BTR308 a rare TVR part or a more generic one please?

The 3.08 may be a bridge to far with your little 4l .. Ask Derek he imported one from Australia.

[Discopotatoes]

I think the Tuscan racers used them, I got mine from the guy who looked after the last twin turbo griff that ended its days up a tree, I believe holdens use them too,
Now my first gear is useable again

[TV8]

SILICONEKID343HP said:

TV8 said:

Is the BTR308 a rare TVR part or a more generic one please?

The 3.08 may be a bridge to far with your little 4l .. Ask Derek he imported one from Australia.

That may be the case with my rather fine blue car in the classifieds but I am hoping that my 5.3 V8 Developments Chianti coloured Chimaera should be able to handle it .

[rigga]

TV8 said:

SILICONEKID343HP said:

TV8 said:

Is the BTR308 a rare TVR part or a more generic one please?

The 3.08 may be a bridge to far with your little 4l .. Ask Derek he imported one from Australia.

That may be the case with my rather fine blue car in the classifieds but I am hoping that my 5.3 V8 Developments Chianti coloured Chimaera should be able to handle it .

Ha ha ....good comeback OP.....Daz stop being size ist

[SILICONEKID343HP]

rigga said:

Ha ha ....good comeback OP.....Daz stop being size ist

I don`t think the 5.3 will rev enough to cope with the 3.08

[phazed]

Graham, from memory my 4.6 runs the same gearing.
I'll check it next week against a st nav and also the new car.

I suppose if that's correct, that's why my 4.6 has such good acceleration from 80 in 5th.

[TV8]

Thanks Peter. It seems like the T5 box has these sort of ratios, so your new car could be the same. You asked me how fast it was compared with the 400 and I said it seemed as fast in 1st or 5th! This helps explain the acceleration in 5th!

[chris1972]

Discopotatoes said:

Just to stick the boot in! I get 90 mph at 3000 rpm ( on track of course) and 70 at 2100 rpm

3000rpm/ 80mpg on my 500

[QBee]

Going back to the fuel economy point, letting the engine run freely is the best for fuel economy. So around town third is better than fourth, and at 50-60 fourth may get better results than fifth. Constant speed gives best fuel economy - ask anyone with cruise control and a dashboard readout. Mine goes up 10% or more if I use cruise in my daily driver.

[SILICONEKID343HP]

Discopotatoes said:

Daz you need to speak to Kieth woods over on face book he did the brackets

Mailed Keith Woods with no answer ! How can I contact him ? Will he fabricate brackets