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Old 02-12-2006, 08:16 PM   #1
325isedan
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diy e36 mods

what can i do to a non vanos engine 2.5l while I have it all apart? porting and polishing? if so which intake or exhaust ports? Cam shaft? basically diy mods, cuz i have the engine half apart got about another 5-10 hours left max, n e imput ill consider and will keep the board posted with pics, thanx!
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Old 02-12-2006, 08:47 PM   #2
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Upgrading cams is definatly something a lot of people do. The m50 takes different kind of cams, i believe s52 cams will work in a m50, but dont provide as much of a gain as they would in a m52. You also need the tool to align them. Are you considering installing a 3.5" HFM aswell?
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Old 02-12-2006, 08:49 PM   #3
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n e thing goes right now, so yeah 3.5hfm is worth considering and doin
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Old 02-12-2006, 10:23 PM   #4
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For cams you're pretty much at a loss unless you buy a Schrick intake cam and install the stock intake cam on the exhaust side. You can't use M3 cams in the non-vanos engine. A 3.5" HFM won't do anything for you, it's not a bottleneck in the intake tract. It's not even useful on the 2.8L engine.

Porting and polishing isn't all that great, or cheap. The non-vanos head is a great head out of the box. The stock valvetrain is great. If you want to increase airflow, just get an intake cam, shorty exhaust headers, and a proper cold air intake.
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Old 02-12-2006, 11:19 PM   #5
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quick question. whats HFM?
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Old 02-12-2006, 11:30 PM   #6
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HFM is the air flow meter. the M50s make no use of it, even if you add larger injectors.

I have a 92 as well, if im even considering any mods its FI. Afterall, that is why i bought the 92. The thicker cylinder walls, shorter stroke..dual valvesprings (hello 7000rpm)..sounds like sex to me combined with a nice turbocharger.
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Old 02-12-2006, 11:46 PM   #7
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Quote:
Originally Posted by jonny_blaze
HFM is the air flow meter. the M50s make no use of it, even if you add larger injectors.

I have a 92 as well, if im even considering any mods its FI. Afterall, that is why i bought the 92. The thicker cylinder walls, shorter stroke..dual valvesprings (hello 7000rpm)..sounds like sex to me combined with a nice turbocharger.
M50's make no use of an HFM? Have you ever disconnected the HFM and tried to get the engine to run?

HFM actually stands for hot film meter, also known as the AFM, air meter, etc, etc.

The 92 has the same bore stroke (84x75mm) as the 87-95 (non-eta) m20 and m50TU engines, the cylinder walls are the same thickness as the 93-95 M50TU engines. Pretty much the whole motor minus the head is the same as the M50TU
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Old 02-12-2006, 11:56 PM   #8
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k guys I have the t.b off, the intake manifold off, the valve cover off with the ignition coils obvioulsly, spark plugs, fuel lines and all, now where do I focus my attention to, in order to get to the head gasket...thanx again, step by step I will do this, lol ( WHOA I CAN'T BELIEVE I AM ATTEMPTING THIS ALONE!) help maxbimmer!!!
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Old 02-12-2006, 11:58 PM   #9
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every time i read one of nelsons posts, it encourages me not to give anyone any car advice (nelson keep posting, the other forum members will thank you)
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Old 02-13-2006, 04:51 AM   #10
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Quote:
Originally Posted by 325isedan
k guys I have the t.b off, the intake manifold off, the valve cover off with the ignition coils obvioulsly, spark plugs, fuel lines and all, now where do I focus my attention to, in order to get to the head gasket...thanx again, step by step I will do this, lol ( WHOA I CAN'T BELIEVE I AM ATTEMPTING THIS ALONE!) help maxbimmer!!!
we can offer quite a bit of advice and guidance, but I would highly recommend investing a few dollars in a bentley manual or a similar manual that does an engine strip-down. Not that we can't provide the information you need, but step by step pictures can help quite a bit.
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Old 02-13-2006, 11:45 AM   #11
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I dl'd the link that was on here for the benlty manual but it needed a password after I opened it...does n e body else have it or know the pass for it? I don't know what to tackle next on the engine in terms of tearing it down, I could tear it all down but I wanna do it right. Justine point me in the direction and ill do it, lol, plz and ty guys!
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Old 02-13-2006, 12:00 PM   #12
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if the intake manifold is off, shouldnt the head gasket be the next down the line, sitting right on top of the cylinder heads?

correct me if im wrong... cuz i usually am.

ps - i like ur name for justin. justine!
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Old 02-13-2006, 04:13 PM   #13
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hopefully i get steered into the right direction tonight as its one of my only free nights this week and im still payin insurance on it and need it runnin asap, thanx again bro's
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Old 02-13-2006, 09:19 PM   #14
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Quote:
Originally Posted by BennyL
if the intake manifold is off, shouldnt the head gasket be the next down the line, sitting right on top of the cylinder heads?

correct me if im wrong... cuz i usually am.

ps - i like ur name for justin. justine!


hg is between the head and block (above the cylinders, below the head) the one ontop is just the seal for the valve cover


correct ME if I'm wrong but I don't believe I am
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Old 02-13-2006, 11:31 PM   #15
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so do i have to tear down the cam shaft and all that?
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