m30 swap m30 or m10 gearbox?

[whipsey]

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

[FormerMember]

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

[whipsey]

what kind of power etc can the m10 box handle?

[GrindCulture]

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!

[jaffro]

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.

[whipsey]

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?

[jaffro]

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

[whipsey]

so are the auto and manual props a different size?

[jaffro]

yeh its manual 325 prop you need.

[whipsey]

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

[jaffro]

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

[whipsey]

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

[whipsey]

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

is that the rubber part attached to the gearbox?

[jaffro]

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

[whipsey]

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

[ric325i]