Miller W.A.R. Machine

[CrazyB]

Sweet, also as a side not, got my Miller Maf a week ago and have been loving every minute of driving my car now.

[E-Thirty]

Subscribed! This is m20licious.

[briansjacobs]

another thought, I know with my old 2.5 motor at 11.5:1 compression the factory throttle body was adequate to pull me up to 8000 RPM. Now with my 2.8 (diesel crank,10.5:1,1mm bore, and 288 schrick) the motor stops making power at 6300 and will not rev past 7000 at all. I am wondering if this is lack of air due to a restriction, do you think the throttle body mod plus honing intake manifold will have any signifacant gains?

i really only need the RPMS for when I run Daytona, the etra RPMS help alot there.

[briansjacobs]

it would be very cool to see those kind of numbers, I am wondering what all the tweaking will do to the power band. What is AFR looking like, I did not see that on the graph.

We were making really good numbers on my car but the AFR was crazy, we tuned my for perfect AFR at WOT and were able to achieve 12.1-12.8 from 2500-6300 RPM. That to me was the best part of the WAR Chip.

[brody]

Thanks for the positive comments guys! We have a couple more things to try... If we make 185 - 190 on stock displacement/compression I think we will ALL be laughing.

[CorvallisBMW]

Great to see some good dyno charts and real research! I know I love my maf/war combo on the m30 swap, best money you can spend on bolt-on parts period.

[briansjacobs]

Brody, I think they were 180/175 at 90F. I will head over to the shop. Want to talk to you sometime about intake as I have 3" in a shielded box behind the headlights (removed)

also need to see the difference in filters on the dyno as we are also running a mustang. Amazing to see the power you are making compared to our stroker with compression and a 288.

[Mitch M]

Good stuff. Any data on the early metal airbox that runs the larger e30 M3 sized filter?

[brody]

Brody, impressive numbers. Did I ever get you a dyno sheet of my runs after the MAF?

Cool videos! And I don't recall getting the dyno graphs. Would love to have them on hand though!

[SpecM]

would love to see pics of this intake

[kamotors]

nice

[briansjacobs]

Brody, impressive numbers. Did I ever get you a dyno sheet of my runs after the MAF?

a couple vids below

http://www.youtube.com/watch?v=n_lIVxqW6jQ (at idle)

http://www.youtube.com/user/briansja.../8/aR1u_hCy74Q (on the dyno)

http://www.youtube.com/user/briansja.../5/camtQrsSMVg (at HMS with 14 year old driving, trying to chase a 700hp vette)

[brody]

M30 Throttle body and 3" intake tract

We have been asked if a larger throttle body makes more power on an M20 a lot. We have always said the gains would be marginal at best.

We decided to measure vacuum on the stock set up to see how restrictive everything was.

Some popular arguments on the forums are "BMW designed the best intake box possible" or, "Aftermarket intakes make less power than stock." Our finding proved that the entire intake tract, air box included are a restriction when you start making more power than stock. While the vacuum isn't much, it still shows that the engine is having to suck hard enough that the "staw and box" in front of the throttle body is restrictive.

At first, we machined an M30 throttle body adapter did a test, and nothing much changed. What does that mean? The throttle body isn't the restriction.

The next thing we did was create a proper 3" intake tract with cold air, that sits down and behind the fog light away from the Rad's heat. We gained 6 WHP and the vacuum was significantly reduced.

Naturally we thought we should test it with the stock air box and 3.0" intake tract. We modified the stock air box to accept our 3.0" MAF and it was now 3" from the box to the intake manifold. We lost 3 - 4 HP.

Here is a dyno graph plotting the small but noticeable power gains, as well as the reduction in vacuum.



Let's just see how much power a stock displacement M20 can make!

[u3b3rg33k]

I like it.

[E30Nova]

Sounds like my car....

Yes I'm srs...

I still want your MAF kit tho...

Matt