Track day gear box - Saxperience

Jimmy-Boy · 8th June 2013, 19:51

Hi all, i currently have a rallye S1 box rebuilt with a sports cluster 4.9FD and gripper diff.

The car is 100% track focused running 7" road legal slicks atm, NA 141.3bhp atw on jenvey throttle bodies etc.

Now was looking at the quaife close ratio gearset in the near future, would this be a good move for overall speed per £ or would the money be better spent else where? obviously other options will be considered but please post away your thoughts, if anyone here has one it would be good for them to share their knowledge!

James

Dave_P · 8th June 2013, 20:06

New or used?

sexy_gt · 8th June 2013, 20:39

I would of used one of the quaife gear kits if I had kept with the old bodies engine...

yr51ocw · 8th June 2013, 20:45

with that kind of engine performance, I would have imagined that you have a resonable spread of torque and the engine doesnt rev that high. I personally would look else where to improve lap times.

KamRacing · 8th June 2013, 20:54

It's a good idea.
You will be significantly faster with the right gearset

Jimmy-Boy · 8th June 2013, 22:04

New or used, I need to dog up my dyno graph to see when peak power is made etc

might be going phase 4s or supercharged in the future to...

jpsaxo · 9th June 2013, 02:50

Decide your future engine spec first - no point buying a quaife gearset with a top speed of 115mph @ 7.8k and then changing your engine spec 6 months later for a supercharger that needs 140mph @ 7.8k

e8_pqck · 9th June 2013, 07:00

What's your top end on the current box? Are you hitting the limiter on the straight in 5th?

sexy_gt · 9th June 2013, 07:47

Quote:

Originally Posted by jpsaxo

Decide your future engine spec first - no point buying a quaife gearset with a top speed of 115mph @ 7.8k and then changing your engine spec 6 months later for a supercharger that needs 140mph @ 7.8k

i would go with this!

axsaxoman · 9th June 2013, 09:45

If its a REAL track car --then touring cars only gear for around 135-140 with 6 pseeds and thats with 300bhp --but if its going to be a road /track car then with s/c you could carry higher gearing as the power band will be wider than highly cammed n/a
as already said you need to work out the cars prime function ,then spec to suit .big bhp + lower gearing make more wheelspin with carless throttle application
check this vid out

this car has 380bhp and is s/c and is geared for acceleration ,but he also has full traction control and thats why once he gets past the 600bhp scoobie he justs drives away --no lag with s/c ,as you can see on the scoobie and he can nai the throttle in the corners and let the traction control do the work

Jimmy-Boy · 9th June 2013, 12:19

The car is never going to see road use, and i thought before spending more money on the engine power i would get everything else set up and mastered first...

i have been around 115-120 off vts clocks on snetterton and woodbridge airfeild, now i have stack gauges it should be more accurate readings.

However current in gear top speeds;

1st: 30.1mph
2nd: 52.6mph
3rd: 76mph
4th: 97.7mph
5th: 120.1mph

That alfa is very impressive!

solvi · 10th June 2013, 18:35

Quote:

Originally Posted by Jimmy-Boy

Hi all, i currently have a rallye S1 box rebuilt with a sports cluster 4.9FD and gripper diff.

The car is 100% track focused running 7" road legal slicks atm, NA 141.3bhp

the 13/59 =4,538 is beter suited for track...its not??

Danixxx · 14th July 2013, 15:11

Quote:

Originally Posted by solvi

the 13/59 =4,538 is beter suited for track...its not??

Hello. 13/59=4,538 where can i find this parts??? In what gearbox is in?
I want to replace in my vts gearbox for shorter rear.

KamRacing · 14th July 2013, 19:06

I'm not sure I'd be gearing it less than what you have. It's pretty short already.

solvi · 21st July 2013, 22:41

Quote:

Originally Posted by Danixxx

Hello. 13/59=4,538 where can i find this parts??? In what gearbox is in?
I want to replace in my vts gearbox for shorter rear.

this ones its the bester final for track...opinion.
its easy to find here...in portugal.

but its a popular mod..

axsaxoman · 22nd July 2013, 08:23

Quote:

Originally Posted by Danixxx

Hello. 13/59=4,538 where can i find this parts??? In what gearbox is in?
I want to replace in my vts gearbox for shorter rear.

any vts or 106 gti box will ahve either 13/59 or 14/60

AlexFocusST · 24th July 2013, 20:35

The 13/59 crown and pinion is what the 106 1,3 lt rallye came with , at least in greece that is . Very popular over here too ,
i would advise making wedge holes for it on the diff as i have heard stories off differentials actually spinning inside it on high powered cars