Just dynoed my m30b35... not pleased.

[digger]

who said the dyno is correctly calibrated? Take it to the track and get a trapspeed you should be able to get 95mph and if you do then there is no problem. Otherwise post up the graph for us and you should see whether it dies at the topend or is down across all rpms.

[Mystikal]

I don't have my dyno plot at hand ATM, but the curve is much smoother than yours... I don't think I have an A/F ratio problem... My hp curve goes up to almost max at around 3.5k rpm and just rises slightly after that, dropping off at about 6.1K rpm.

That sounds exactly like an A/F problem, actually.

Not saying it couldn't be other things, but askew A/F does exactly that.

[92 mtechnic cabrio]

who said the dyno is correctly calibrated? Take it to the track and get a trapspeed you should be able to get 95mph and if you do then there is no problem. Otherwise post up the graph for us and you should see whether it dies at the topend or is down across all rpms.

do you mean like....drag strip?

cause any car could take it to 95mph on a track.

[MR 325]

cause any car could take it to 95mph on the track.

Not true, you only have a 1/4 mile to run and a lot of cars won't even break 90.

[92 mtechnic cabrio]

Not true, you only have a 1/4 mile to run and a lot of cars won't even break 90.

That is what I'm trying to make clear. Is it a 1/4 mile drag strip or a track? Because tracks average 2 - 4 miles in length, and they loop.

[Mystikal]

lol, i think it's pretty obvious he meant 1/4 "track".

[Jean]

lol, i think it's pretty obvious he meant 1/4 "track".

lol. yeah, if you can't get to 90mph on a 2 mile road/course then your car has other problems :hitler:

[blueapplesoda]

That is what I'm trying to make clear. Is it a 1/4 mile drag strip or a track? Because tracks average 2 - 4 miles in length, and they loop.

I agree.
to some people, track means this: |

imho thats not really a track........i call that a strip...i.e., litmus strip, strip pole, Listerine strips, etc.. they are striaght
in my mind, a track looks like this: S
so whatever floats your boats

[e34john]

i like tracks that look like 8

[StereoInstaller1]

i like tracks that look like 8

With or without a bridge?

[george graves]

With or without a bridge?

2 ramps....

[MrK]

Air filter, fuel filter, o2 sensor...plenty could be wrong.

I'd start by dynoing again with A/F readings. I think doing without is useless anyways.

I don't have the luxury of dynoing with A/F readings. I was lucky enough to find any sort of dyno at all in this country LOL.

Update:

I have an SMT-7 piggyback installed in this car, but I hadn't really touched it until a couple days ago. Using the datalog feature, me and a friend of mine compared +2, +4, +6 etc degree ignition advance. Surprisingly, the beast took up 8 degrees advance over stock with no issues. It also took 10 degrees, but that caused a performance decrease. In combination with richening the mixture slightly after 4.8k rpm, the car has gained some serious pep. Time to re-dyno!

[Mike325]

Good too hear man. Let us know what you run this time.

[bumpstop335i]

What grade of octane are you using?

Got to hear that it is alive!

[MrK]

I use 'Super' 98 octane fuel, which I believe is the equivalent to 93RON. I'm sure that helps a little :D

One good thing about Lebanon, all they have is 95 and 98 LOL.