Group re-map/chip tuning

Does anyone know what the difference between the M52 2.5L engine as per an e46 323ci and a 325ci. And more importantly what can be done to get the 323ci up to 193bhp or so. I had been hoping there might be a straightforward way to make the 323ci "become" a 325ci.

Anyone got any ideas?

Thanks

John

Aaaahh - now it's all clear.

Thanks for that Killian - I'll look into it. Would you recommend getting a chip and remap too? At £125 it seems a low cost option for 8bhp

I have fitted the manifold only, but am going to see chippeduk this weekend for a remap, so I could let you know how the 2.8 fairs with the remap.

The manifold alone has made a notible difference and have got used to it now. But if I want to be reminded how it restricts the engine, I just drive the gf's Z3 2.8 although this is a 99 version, so double vanos and does have a good low end pull it still runs out of puff above 5,000rpm. The engine does cope with the extra airflow from the manifold, but I'm sure a remap will help more. I have noticed the induction bark at high revs is quieter since fitting the manifold, maybe this is due to more air and running a slightly leaner mixture - I'm hoping a remap will give the bark back!!  Obviuosly only with a sports filter will it bark.

On a 2.8 with manifold and remap - 225+bhp. There are 328s on e36coupe forum with a proven 240bhp from manifold, bbtb, airfilter, remap and exhaust.

325/323 (323 with M50 manifold) should see 210+bhp.

And a good increase in mpg!!

alpina527 wrote: If you find a manifold, it must be part number 1 735 730 2.5 or alternatively, 1 735 728 2.5. No other number will do. They are fitted to E36 325 and E34 525 models from 92-96. They need extensive modification, which will take about a week. The bodies are always in stock. The part number is located under the throttle body hole. If you have any doubt about which manifold you have, please email me on alpina527@aol.com or phone/text +447968391056 Make sure they aren't from the 2 litre!!

Ian,

How do they differ? Wasn't there a certain amount of ribs that can be counted too?

chippedup says the remap will only give an 8bhp gain. Ludo seems to think that a remap then the manifold and throttle body might be too much for the ECU.

Dave328 reckons on 210bhp+ from the lot (sounds nice!)

Opinions / Advice anyone?

Dave: The correct type has 12 ribs to the left side of the throttle body, The other type has 5 ribs to the left. These are no good for my conversion. I have pictures if you need them at alpina527@aol.com

Any chips for the M54 engine in the 320 coupe ????? (2.2litre)

Topazman 

fab will charge you roughly 2.5 times the price anyone else does.

but there service is second to none !