E30 Zone

quick question i've got both an m30 and m10 maual gearboxs have read in a post that if the m10 box is used i can use an m20b20 prop with no modifications

Use M30 gearbox, box behind M10 can't take the torque for long.

what kind of power etc can the m10 box handle?

There's a guy in the states (goes by the username of Good and Tight on various forums) who was putting down near to 360bhp from a stock M10, with a stock gearbox and driveline, running on about 30psi of boost. So by the looks of that, a lot!

depends how you intend to drive it. why not just change output flange on m30 box for m20 flange then use a m20 2.5 prop.

will it fit jaffro? i have a spare m20b20 and b25 prop sitting here would prefer to use the m30 box as i have a new clutch for it would an auto have a different prop?

yeh me a ric325i have just done the very thing a its perfect a saves the hassle of m3 or custom props and the cost

so are the auto and manual props a different size?

yeh its manual 325 prop you need.

damn i've got an auto 325 prop and a manual 320 one

somebody must have just a front part of manual 2.5 prop they could donate to you thats near by. i gave my last 1 away 2

do you know the size of the props needed i'll have a look at what i have i think there is an m10 prop here as well

jaffro wrote:output flange on m30 box for m20 flange then use a m20 2.5 prop.

is that the rubber part attached to the gearbox?

yeh mate its attached to the output flange with 3 bolts.

woohoo got that off will swap with the m30 one now will just need to get a 325 manual prop