max power on standard internals

Post Sat Aug 15, 2009 1:04 pm

what is the max power you can run on a 2.5 engine with standard internals when using a turbo?
Is the 2.5 engine in the e30 a m20?

Post Sat Aug 15, 2009 1:05 pm

Hi Russ

The engine is indeed an M20 but I'm afraid I'm not sure what the standard internals will take with a hairdryer feeding it.

Post Sat Aug 15, 2009 2:36 pm

I've heard 450bhp on, I believe, 9psi from Gunni, but the transmission wouldn't take it.

Post Sat Aug 15, 2009 5:23 pm

internals are all good upto the 350bhp mark..

Post Sat Aug 15, 2009 6:22 pm

need more than 9psi to get 450HP :lol:

stock internals will eat 350, the stock clutch will take 280 ish max, stock tranny will survive 400+ but not for long !

Post Sat Aug 15, 2009 7:10 pm

cool cheers

Post Sat Aug 15, 2009 7:20 pm

what about a 320i as mines coming of the road, so i can get a bike

its has a v nice engine if slow -low mileage - what would that handle having a different head compression etc

thanks

Post Sun Aug 16, 2009 9:05 pm

Get a 2.5 and use that. It´s going to make everything so much easier.

Stock internal M20B25´s will handle 500hp with the proper tuning and if you keep the torque "down", and I mean below 500lbs.

Stock pistons are the problem but I´ve not even heard about when they actually start to fail.
But I think people who want more then 500hp using m20´s go for rods and pistons

Post Mon Aug 17, 2009 11:17 am

Don't forget uprated head bolts.

Post Thu Aug 20, 2009 11:05 am

Gunni wrote:Get a 2.5 and use that. It´s going to make everything so much easier.

Stock internal M20B25´s will handle 500hp with the proper tuning and if you keep the torque "down", and I mean below 500lbs.

Stock pistons are the problem but I´ve not even heard about when they actually start to fail.
But I think people who want more then 500hp using m20´s go for rods and pistons

What do you mean by proper tuning? Steel HG, Head studs, Rod bolts?

Post Thu Aug 20, 2009 7:28 pm

no proper engine management tuning.

Post Fri Aug 21, 2009 8:21 am

Could you explain more please mate?

Post Fri Aug 21, 2009 1:28 pm

You need somebody to tune the ignition advance and air fuel ratios.
Ideally it will be a fully adjustable standalone ecu.

Post Fri Aug 21, 2009 2:12 pm

I kind of got that much mate. Wast there something specific that had to be done with the map i.e AFR's, advance etc.

Post Fri Aug 21, 2009 2:20 pm

Would turboing LPG be any different? With higher Octane rating and cooler charge temps (I think) can you boost it harder?

Post Fri Aug 21, 2009 4:41 pm

MarkT wrote:I kind of got that much mate. Wast there something specific that had to be done with the map i.e AFR's, advance etc.

Just have it done by a professional on a dyno.

Post Fri Aug 21, 2009 4:42 pm

Morat wrote:Would turboing LPG be any different? With higher Octane rating and cooler charge temps (I think) can you boost it harder?

As long as you can tune the amount of LPG against manifold pressure and adjust ignition then you can tune it as long as the engine can take it or until you become knock limited.

Post Fri Aug 21, 2009 6:08 pm

Gunni wrote:
MarkT wrote:I kind of got that much mate. Wast there something specific that had to be done with the map i.e AFR's, advance etc.
Just have it done by a professional on a dyno.

Fair enough mate, so simple it has to make sence lol!