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Old 10-14-2009, 09:19 PM   #1
freeride53
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Cheap/Basic M42 Mods.

What is out there?
I've done some searches, but I want to see what could happen first-with a budget.

The car at hand is a 1991 Bmw 318i 4d. (m42 as yall know)

I've been reading about chipping, which is the best, and provides the best hp gain? also, exhaust, intake, etc.

This is a highschool/d.d/fun car that I'm working on getting all together so I can retire the Peugeot to a weekend/occasion car.
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Old 10-14-2009, 09:22 PM   #2
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mark D / WAR chip are the two best

Intake Is not so much a mod UNLESS you go Headling intake which DOES improve the car. Superspring/ REMUS/ Stromung or GTFO

Regrind Cams are an option for 300 bucks

m20 flywheel is a cheap option too for performance.

Or get a Supra motor?

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Old 10-14-2009, 09:23 PM   #3
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I think the exhaust on the M42 is already stock at 2 1/4 you should jump up to 2 1/2 a better cat and muffter setup. The summit racing turbo muffler sounds awsome on the M42's. My buddy had a MarkD chip on his M42 and it made a big big improvment. Its pretty much the best bang for your buck.
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Old 10-14-2009, 09:30 PM   #4
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hmm.
i've heard about m20 flys, i think i'm going to for sure opt for one of those. those are off the 325's right?

lol...2-jay-z?!
i will keep the car original-bmw.
and the car will be staying with the M42...till maybe i'm out of college, and thats a far way down the line.

I wanna have a car that wont take shit from my friends' integras, subar-whos, yotas, etc..

i wanna do a 5-lug soon, and throw something like some m-system throwing stars on, and do the suspension all up, and do a lsd.
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Old 10-14-2009, 09:38 PM   #5
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Quote:
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I wanna have a car that wont take shit from my friends' integras, subar-whos, yotas, etc..
Should of bought a wrx if you wanna keep up with wrx's. Mostly stock tegs and most things 6 cylinder and/or turbo from toyota will also beat m42 powered cars.

There's a ti in the south san jose pick n pull for your 5 lug setup.
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Old 10-15-2009, 08:11 AM   #6
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No need to upgrade the headers they're already a tubular setup.
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Old 10-15-2009, 10:27 AM   #7
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The ONLY worthwhile mod on a street driven M42 is a chip. I have used both MarkD and Turner and they are both great.

Intake and exhaust will do absolutely nothing. A lightweight flywheel is nice, but not a power mod.
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Old 10-15-2009, 10:28 AM   #8
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I've done cams too, they are awesome on the track but suck for the street.
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Old 10-16-2009, 04:56 AM   #9
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as per usual, making sure all the wear items/maintenance stuff on the motor is fresh will do more than most "mods", chips not withstanding...
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Old 10-20-2009, 04:33 PM   #10
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Intake cam is adjustable. Advance it 4 degrees and get a chip.
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Old 10-20-2009, 05:09 PM   #11
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So you're going to take on that Integra after all?
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Old 10-20-2009, 06:53 PM   #12
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Intake cam is adjustable. Advance it 4 degrees and get a chip.
it looks like BOTH intake & Exhaust cams may be adjustable .. (at least on my E36M42)
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Old 10-20-2009, 06:57 PM   #13
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Intake cam is adjustable. Advance it 4 degrees.
I've heard about this, but I thought I read 6 degrees. What kind of difference does this really make?
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Old 10-20-2009, 08:09 PM   #14
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Pretty much a free-er flowing cat and rear muffler and chip are your best bang for buck mods.

RE: adjustable cams. The slots in the cam gears give you +/- 6 degrees on the standard settings. By moving them you can change the lobe seperation basically, all your doing is moving the power and torque curves around, you can get a few hp out of it but apparently absolutely kills your bottom end.

Take the heater plate out of the intake if you have it and dump a ton of old hoses just waiting to give you hell in the process.

Otherwise your looking at cams and a chip to suit.

The M20 flywheel is a nice mod, I've done it. You want a single mass M20 flywheel. And if you can bear it dump p/s and a/c. Also if you throw an electric fan on you can free up a few hp there.
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Old 10-20-2009, 09:42 PM   #15
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Altering the exhaust cam messes with the cam position sensor position (affecting ignition timing).
No it doesn't.
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