E30 Zone

is there a big differance between pre facelift 320 engines and late engines?

no difference in my opinion I have owned quite a few of both

i think it was only the 2.5 that high and low comp engines

thanks, so it would'nt matter if it was a pre/post facelift 320i i used as a track car????

no but if i had a track car and was changing the engine it would be having a 2.5 stuck in it

yes, i know what you mean, but had the PBMW series in mind!!

o right so your going to race then it has to be stock to enter that dosent it

Eventually!! thats why i wanted to know which model to look for!!

The p/fl uses jetronic injection and the f/l uses motronic on the 320i. All 325i's use motronic though.

Chris00 wrote:The p/fl uses jetronic injection and the f/l uses motronic on the 320i. All 325i's use motronic though.

What he said! They've got a totally different injection / dizzy setup. I'm not sure of power /compression figures etc, but I'd expect the later one to be better. Plus, finding a solid pre-facelift 320i is not an easy task!

As said above, the management is different, also on very early ones they have a mechanical fuel pump run off the cam IIRC.

Get a 318is for the PBMW championship.

SELOC PBMW is 318i and 320i only, Tom.

handpaper wrote:SELOC PBMW is 318i and 320i only, Tom.

Ah, no 4 valve per cylinder's then is the rule I assume?

Chris00 wrote:The p/fl uses jetronic injection and the f/l uses motronic on the 320i.

L-jet used 9.8:1 comp (IIRC) and Motronic is 8.8:1.

tomson wrote:

handpaper wrote:SELOC PBMW is 318i and 320i only, Tom.

Ah, no 4 valve per cylinder's then is the rule I assume?

SELOC rules are very tight, you're only allowed untuned M40B18 or M20B20 engines. Everything between the air filter and exhaust downpipe must be standard.

So, is there any pro's/con's for either engine? power etc!!

In the New Zealand e30 class i compete in the best engine package is a p/fl bottom end and the f/l top end. This gives you the best compresion and the best injection setup