172 Cup Gearbox Conversion benefits

[ventura]

Hi Guys

Have a mk1 172 with ITb's and cams. Its a quick car however its quick above 4-5,000 rpm and the gearbox ratios seen to long. My mate has a 172 cup and his car is so quick of the mark. He reckons i should but a cup gearbox in mine as it has shorter ratios and will be better for the car and the engine set up i have. What do you guys think?

 

[Djw Dave]

Cup box (JC5-129) is shorter than the ph1 (JC5-089) but it depends what you're aim is. If you're going for lap times then go for it but if not then I wouldn't change a perfectly working 089 for an unknown 129.

 

[Ph1 Tom]

I know how you feel, I intend on doing it when I need a new clutch

 

[ventura]

Yeah it is a track car so would benefit

 

[ventura]

Any other people done this conversion?

 

[Russ_16v]

I have always been tempted with it tbh