Thinking of going sequential, some questions first!

[Ross_328i_sport]

Further to my previous thread regarding the engine rebuild hours of the duratec engine in various levels of tune I am also now thinking along the lines of incorporating further upgrades to the car whilst the engine is out and this relates to the gearbox and replacing the current Caterham 6 speed with a sequential.
Basically I have 2 options in terms of engine spec that I need to choose between: -

Relatively Standard 220 BHP
Forged internals and 260 BHP

My questions are what needs to be done to fit a sequential gearbox and are there any optional items worth upgrading whilst doing the change and does this change depending on the power levels you run.

My car is an 2003 SV (Engine has been changed from K Series)

It would be nice to hear from anybody that has done the change or has nearly finished their research. Some of the questions I have: -

- Has there been any chassis modifications strengthening been needed (i.e. tunnel widening or extra diff supports) I do have the diff support from Caterham fitted to the car.
- ECU and GCU wise I am fairly aware of in terms of what is required.
- Does the prop-shaft diameter need to be increased and stronger material selected?
- Is it worth changing to an ultralight flywheel and clutch combination? How long do these last and what are recommended?
These are the issues/ problem areas I can think of at the moment however if there are more areas where installations have become difficult or with hindsight you would have done it a different way then please your experience is appreciated.

Thanks
Ross

[Ross_328i_sport]

Thanks for the information.

Reading through the thread you posted and the research you have done how long are you expecting out of the clutch and what clutch and flywheel combination are you using?

Moving forward with my car I have decided I will only complete track day in the car and race the fun cup therefore on the engine side of thinks am looking at going for a relatively standard engine for reliability therefore would appreciated what those who race in the R300 series have done to achieve reliable running out of their change to sequential and what clutch and flywheel combination they are using.

[Ross_328i_sport]

From the perspective of using a relatively standard engine how many miles would you expect to see from a 7.25" clutch utilising a sequential box?