M30 conversion - prop question

Post Sat Jul 18, 2009 5:33 pm

Hi guys,

Not been on the zone for a while as 'lost interest' in the E30 for bit

I have had a new boost of enthusiasm and am starting my 3.5 swap! I have read that the 2.5 flange and prop can be used, but my car has a 320 prop. Are the 320 and 325 props the same?

I'm hoping so then i can find a 2.5 gearbox flange (as ive read the the 2.0 one wont fit the 3.5 box) and bob's your uncle...

Any help will be great

Cheers, Mark

Post Sat Jul 18, 2009 6:44 pm

Stronger option is to get the rear half of the 2.5/2.0 prop and front half of the m30 prop(shortend) or find an m3 prop.

Post Sun Jul 19, 2009 2:08 pm

I have read all of the different options and possibilities but to start with im going to give the standard prop a go. My theory is that if the standard prop can cope with M20 turbo power (as many people have run) then it should take M30 grunt?

I use the car for drifting and have only replaced 1 donut which i noticed was cracked and split when replacing the output shaft seal. For 18 months of abuse and 7/8 trackdays that seems pretty good to me.

Cheers, Mark

Post Sun Jul 19, 2009 2:13 pm

You'll need a 325 prop and flange as its different than the 320 prop, i think the 320 prop is longer and thinner.

Post Sun Jul 19, 2009 2:22 pm

gcs325i wrote:You'll need a 325 prop and flange as its different than the 320 prop, i think the 320 prop is longer and thinner.

Thanks for the info! Another part to add to the list lol!

Cheers, Mark

Post Sun Jul 19, 2009 3:44 pm

You need a manual 325i prop and the flange off a m20 325i box,m20 320i flanges are different.

Im using the standard prop with my m30 and no issues.......yet!

Post Sun Jul 19, 2009 5:27 pm

leeparkes wrote:You need a manual 325i prop and the flange off a m20 325i box,m20 320i flanges are different.

Im using the standard prop with my m30 and no issues.......yet!

Good man thank you!

Post Sun Jul 19, 2009 10:09 pm

yep, i can confirm the above mate, im also using a standard 2.5 prop and all you have to do is just swap the gearbox flange to a 2.5 one... job done !

Post Mon Jul 20, 2009 2:28 pm

blingsta wrote:yep, i can confirm the above mate, im also using a standard 2.5 prop and all you have to do is just swap the gearbox flange to a 2.5 one... job done !

Sounds like the most straightforward, money friendly option to me!

Cheers, Mark

Post Mon Jul 20, 2009 5:07 pm

Hae you just stared or nearly complete??

Post Tue Jul 21, 2009 7:09 am

Rav335uk wrote:Hae you just stared or nearly complete??

I have nearly started lol!!!