RB225 tuning options

[dopeshots]

Just acquired an RB225 with Franspeed pipe & tmx35. It put out 26bhp on the Dyno but has just one the crank.

I looking for options to make it a very fast street engine. Would ideally like it to do a genuine 90+ mph so may need to change gearbox. It is running 18-47 gearing on a LI150 gearbox at the mo.

All options/idea welcome..

[Darrell Taylor]

go 17 47
youll need some serious power to crack 90+ on full bodied without wind or downhill on your side expect youll need 38-40 bhp to achieve it

[dopeshots]

What would the best options for tuning be, weld and port the cases, then tune the barrel to suit?

what about the crank, long stroke/short stroke and what are the advantages over each other?

cheers

[Darrell Taylor]

no welding needed at all to get high power figures ,go stroke to 62 if your spending then maximise the cc to get best power/torque
a good cyl tune is essential for high power output