Track Day Project

[nando]

just out of curiosity why did you go with a m20 why not a m5x baced motor?

because no M50 could ever sound like that. :evil:

[Stevie30]

just out of curiosity why did you go with a m20 why not a m5x based motor?

Because hopefully when he goes for the m5x swap he will sell me that engine. Drool, drool.

[Dyno4mance]

just out of curiosity why did you go with a m20 why not a m5x baced motor?

First of all I was not planning on using a bmw engine at all, as an LS1 would have been the first box checked in a perfect world...and in the future this maybe in the plan.
My next idea was to build a 2.1 stroked M42 using a diesel crank from England and on and on...but the cost would have been quite a bit more than the current engine, 2 cams etc and it would have been very simular to the 4G63 evo builds we do all the time.....(so too much like work!!!)
As I understood it at the time of planning M30s were just too heavy, also my research led me to believe thet the M50/S50 was also quite a bit heavier than a M20 baby six...and maybe not as suitable for the e30 chassis
the M20, although an old design, has a very well designed cylinder head that offers very good high and linear torque that can be usually had from a 2 valve head...the only thing missing to get sufficient cylinder pressures to make good power was compression....so I fixed that with 11:1 pistons.
Now I feel with proper tuning using MS and a 7000 rpm red line I feel I can easily achieve around 230bhp on higher octane fuel...I feel that power level is more than enough to move a 2500lb car quite swiftly through most of the events and classes I would like to compete in.
The biggest gripe I have with this driveline choice is not the engine but the lack of choices in transmissions and gear ratios for the Getrag.
I am sure people will disagree with my choices and have different opinions than me on my commentary....but I have built the car now and I am very pleased so far with the results...Flame suit on !!!!

[kid325e]

Damn he answered that like a God.

Any more questions?

[tn325i]

The more he talks the more you will realize he knows exactly what he is talking about.... And a super nice guy on top of that... Makes a very cool car guy.

That is all.....

[Dyno4mance]

A few more pics to bump thread and show recent progress





Videos of tuning and dyno sessions to come.......

[bstaps]

awesome

[Andreas]

Nice car. Glad to see another M20 engine supporter.

Hopefully you will be on track soon and post some videos. I know the M20 is no M-motor but it can still move a stripped out E30 along at a decent pace. Who knows you may even pass a few of the M50 transplant E30s on the track.

Good luck.

[Dyno4mance]

"Who knows you may even pass a few of the M50 transplant E30s on the track."

May?......I would say at this point it is an absolute certainty!!;););):nice:

[Stevie30]

the more he talks the more you will realize he knows exactly what he is talking about.... And a super nice guy on top of that... Makes a very cool car guy.

That is all.....

+1

[Mike]

Are you still going to stick with the 4.10?

[Goya20]

sweetttttt!!!!

[Dyno4mance]

Are you still going to stick with the 4.10?

Yes, for the time being....But having said that I have not driven the car but 400yrds:D......Things may change..
It has good rocker arms and light MM springs so reving it will be less of an issue than most....Probably set red line @ 7000rpm

[Dave]

like the number panel

[Wh33lhop]

Hell yes. Awaiting video.