Free M3 Intake manifold

[jsp98m3]

I have the original plastic intake manifold off my '98 M3. It is free to anyone who wants to come and get it in San Marcos, CA or pay for shipping. Otherwise, its in the trash on Monday.

[stimpee]

Jim,

You're tossing the intake?

I am in for shipping. Please email me!

sandersen@advan-tek.com

I will use it as a runner donor for my supercharger project...

What did you replace it with?

[jsp98m3]

A Shrick intake when I started going high boost on the turbo.

See: http://www.apexcone.com/Schrick/Schrick.html

I powdercoated it black and epoxied in a BMW emblem where the Schrick was supposed to go.

Good for another 8 HP up high.

[00soul]

would it have any pourpose in a e30 stock ingine?

[///M3Dave]

Originally posted by jsp98m3
A Shrick intake when I started going high boost on the turbo.

See: http://www.apexcone.com/Schrick/Schrick.html

I powdercoated it black and epoxied in a BMW emblem where the Schrick was supposed to go.

Good for another 8 HP up high. I've used Schrick Manifold in the past on a VR6 and it did pretty good. I was wondering if you what it would do for a N/A M3? I'm thinking about getting one but would like to know the advantages before buying one. Or do you think I would benifit more in getting the Schrick Cams?

[jsp98m3]

The intake is gone.

I don't think a Schrick is worth a dime on a normally aspirated car.

[Kevlar]

Originally posted by jsp98m3
I don't think a Schrick is worth a dime on a normally aspirated car.

I can't remember where... but somebody did a flowbench comparison comparing the stock intake manifold to the shrick intake manifold and saw that they were both about the same.

[jsp98m3]

Yep. Pretty much does nothing.

But on a Forced Induction motor it can yield some ponies on the top end.

[///M3Dave]

Guess I won't be wasting my money.

[Kevlar]

Today I flowtested a Schrick intake that belongs to Garrick Louie. Just like the M50 and M52 intakes that I tested, the unused runners were blocked off, and the measurements were taken at 28" of water on the 300cfm scale of the flowbench.
cyl.........%.........cfm
...1.........81.........243
..2.........80.........240
...3.........83.........249
..4.........82.........246
..5.........81.........243
..6.........81.........243

Observations:

A) The runner to runner balance is excellent. B) The outlets of the runners (where they mate to the cylinder head) have been CNC'd to the same dimensions as the M50 intake (55mm x 25mm). The actual runners are slightly larger than these dimensions though. C) The surface texture inside the runners is VERY rough (the factory plastic intakes are worlds better). D) The plenum is about the same size as the M52 intake (ie, smaller than an M50 intake). E) The Schrick intake flows between the M50 and M52, yet its port cross-sectional area is about the same as an M50 intake.

Comparison to M52 intake:

The Schrick has larger runners than the M52 intake, and more flow. I calculate the M52's port velocity to be roughly (and this is a VERY rough calculation, just for comparison's sake) 288 ft/sec, whereas the Schrick's port velocity is less than 273 ft/sec. The lower port velocity of the Schrick would explain the loss of low-mid range torque versus the M52 intake, and the higher port volume and flow would explain the slight horsepower gains with it. If the plenum where larger, maybe it would pick up more power up top.

Comparison to M50 intake:

The Schrick's runners have the same outlet size as the M50's intake, but the M50 intake has about 40cfm more flow per runner. The M50's port velocity would be at about 315 ft/sec, much higher than the Schrick's. So the Schrick has less flow, less port velocity, a smaller plenum, and *slightly* larger runners than an M50 intake. (Gee, I wonder why it's said that the Schrick is worthless on an M50 engine?)

Considering how rough of a surface they have, maybe some polishing of the Schrick's runners would help it, Only experimenting could answer that though.

If anybody has some thoughts or corrections regarding my observations, please, speak up. I'm not a professor in intake manifold theory, just a student :)

Nick

[jsp98m3]

The modifications are starting to blend together in my mind but if I remember correctly with 11 psi of boost pressure the dyno showed no loss of HP in the lower ranges but about 8 HP increase above about 5500-5800 rpm.

At that, I wouldn't have bought the Schrick retail. But I picked it up from a guy who had thought about putting it on his 328. I only paid $100 if I remember right. Another $50 to get it powdercoated so it would look stock. $150 for 8 HP is a decent deal once you start scrounging for the last expensive ponies. It certainly isn't cost effective on a retail basis.

[00soul]

jim if you are ever going to give things away from your E30 send me a email :) i notice your a giving person