M42 turbo dyno results

[e30pq]

It's fun to sign up for track events and list the car as an E30 318i.

[Massive Lee]

It would be great to compare the torque curves of a stockie vs this turbo. ;-) The turbo motor will probably double the value at mid rpm.

[iflytii]

Impressive numbers!

[e30pq]

it´s a mode for the dyno you used so that the dyno operator is unable to fudge the numbers

I really don't think our guy "fudged" the numbers.

These numbers weren't shocking for us. We've actually tuned to level in the past when we were running an EBC module.

The last couple times we tuned the car we made less power but that was due to our injectors.

[gstuning]

it´s a mode for the dyno you used so that the dyno operator is unable to fudge the numbers

[e30pq]

Have them turn shootout mode on, they should know better then have you leave with dyno graphs without shootout mode.

Not sure I understand what "shoot out mode" is? Please explain.

[gstuning]

Have them turn shootout mode on, they should know better then have you leave with dyno graphs without shootout mode.

[getouth]

very nice indeed! nice to see people develop and believe in the little guy(M42) rather than sticking an M50/S50 in there. Good deal.

[matias88e30]

Nice! those are good numbers

[e30pq]

Custom pistons. That;s about it.

[matias88e30]

Nice! are u running stock internals?

[e30pq]

We had the car back on the dyno this week.

Dyno results listed here:

http://www.hqautosport.com/dyno_results.html

[e30pq]

Thanks for the feedback.

I drive the car pretty hard. Lets see how long this current G240 lasts for us.

We keep a spare in the trailer and a backup to that one in the garage. We figured their cheap so we should have some backups.

[gearheadE30]

Good to know, although for what it's worth I'm now on my third G240. First one somehow became pressurized and sprayed almost 2 quarts of fluid out of the trans vent in 20 minutes at putnam park. Killed the bearings and synchros, but was a great way to force me to learn to double-clutch after refilling it. Drove it that way for 2 months before I started losing gears. Second one I think may have been damaged a bit before I got it, because it shredded 3rd gear shifting from second to third at Gingerman. Maybe I've just had particularly bad luck, I don't know...

[e30pq]

Interesting about the torque hump from 3k to 3500 revs-I have the same, but more like 3k to 4500. Time to get mine dyno'd as well, although 0.5bar on stock internals won't be anywhere close haha. Always good to see turbo M42s.

fwiw have you ever run a small case diff on the car? I'm kinda assuming not, but I'm trying to figure out if I should put a medium case in/if the small case will hold up long.

Since our car started life as a 325i we always had the medium case diff and a built one at that. With that said, we haven't had the need to try the small case.

Based on what we are finding with the G240, the small case might be strong enough. Heat might be an issue with the small case diff since it probably carries less oil than a medium case (just a guess).

We just started running an oil temp gauge for the diff. Which reminds me to track the temps on that gauge during our next test weekend.