Modifying M20b25 - BMW Forum - BimmerWerkz.com
3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

 
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#1 (permalink) Old 09-25-2004, 11:50 PM
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I'm modifying my 325is to possibly track next summer, and although i know a fair amount about modifying e36's (previous car) I don't know much about the m20b25 motor. My original plan was Schrick Camshaft, Schrick Intake Manifold, CAI/Exhaus/Headers, Custom burned chip and mabe other things.

Note these mods are NOT all that I'm planning to do, the suspension is getting done first. If you guys could please tell me if this sounds like a good idea...or of any other viable options leave me a note.

thanks all.
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#2 (permalink) Old 09-26-2004, 01:22 AM
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Quote:
Originally posted by IAm-Topik@Sep 25 2004, 09:50 PM
I'm modifying my 325is to possibly track next summer, and although i know a fair amount about modifying e36's (previous car) I don't know much about the m20b25 motor. My original plan was Schrick Camshaft, Schrick Intake Manifold, CAI/Exhaus/Headers, Custom burned chip and mabe other things.

Note these mods are NOT all that I'm planning to do, the suspension is getting done first. If you guys could please tell me if this sounds like a good idea...or of any other viable options leave me a note.

thanks all.
[snapback]199130[/snapback]
if you're going to track it - my suggustion would be to buy a whole new m20b25 (not nesseciarily "new" new, but new to you.) and rebuild it. And in the process, have some of it machined. Get the head ported, have the internals ballenced. Blueprint that baby... then hone the cylinders out a little bit, overbore like 1 mm for oversize high comp pistons or something. Just run a real nasty NA beast. I don't know exactly step by step the best way, but my machinest friend says the best way is to "Start from the oil pan, and work your way up."
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#3 (permalink) Old 09-26-2004, 01:31 AM
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Quote:
Originally posted by Halon+Sep 25 2004, 11:22 PM--><div class='quotetop'>QUOTE(Halon @ Sep 25 2004, 11:22 PM)</div><div class='quotemain'><!--QuoteBegin-IAm-Topik@Sep 25 2004, 09:50 PM
I'm modifying my 325is to possibly track next summer, and although i know a fair amount about modifying e36's (previous car) I don't know much about the m20b25 motor. My original plan was Schrick Camshaft, Schrick Intake Manifold, CAI/Exhaus/Headers, Custom burned chip and mabe other things.

Note these mods are NOT all that I'm planning to do, the suspension is getting done first. If you guys could please tell me if this sounds like a good idea...or of any other viable options leave me a note.

thanks all.
[snapback]199130[/snapback]
if you're going to track it - my suggustion would be to buy a whole new m20b25 (not nesseciarily "new" new, but new to you.) and rebuild it. And in the process, have some of it machined. Get the head ported, have the internals ballenced. Blueprint that baby... then hone the cylinders out a little bit, overbore like 1 mm for oversize high comp pistons or something. Just run a real nasty NA beast. I don't know exactly step by step the best way, but my machinest friend says the best way is to "Start from the oil pan, and work your way up."
[snapback]199187[/snapback]
[/b][/quote]

thanks for the suggestion man, the motor thats in this car is already "new" it was 58k on it while the body has high 100's
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#4 (permalink) Old 09-28-2004, 01:47 AM
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umm check out seams engine mods, they have this killer 3litre one for the m20 imma do it wen i get some money for the conversion, ull rip once u have it done


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