ForcedFirebird's m20 dyno thread.

[LowR3V'in]

272 your favorite cam?

[ForcedFirebird]

Updated post #2

Do us dirty and post up a 3.xL if you got any :p

Sorry, missed your post until editing post 2. If you notice, they are kinda in an order from stock-ish to built, so bear with me. I have not had a local 3.x built m20 to put on the dyno yet. Have a budget stroker using the eta crank/rods, -2mm block, B&B to .1gm, stock-ish head with just my flow tested valve job, and 272 cam that will be coming back for the tune once it's broken in a bit, but logistics has been keeping it delayed as he is over a half day drive from the shop. I also lost in the neighborhood of 20 cars when the dyno pc tower crashed - the same reason I now cloud them shortly after. :/

[ForcedFirebird]

Same car in post #3 with our head, 272 cam and RHD ITB.Check out the TQ at 2500 rpm, it's more than peak in the base lol.

[ForcedFirebird]

Ah, sorry... my bad. It seems that we have so many correction factors, hp standards, measurement styles (whp or transmission losses corrected) that it makes me crazy. Thanks for sharing these!

No harm, no foul. HA

With low power engines, it's not as much of a big deal. When changing correction factors on a ~150whp car only changes the numbers a few HP. Naturally when you get to higher HP, the differences are large since it's a percentage based formula.

[hasa]

Ironic you asked. If you look at the screen shots, they are in EEC.

Ah, sorry... my bad. It seems that we have so many correction factors, hp standards, measurement styles (whp or transmission losses corrected) that it makes me crazy. Thanks for sharing these!

[ForcedFirebird]

Been a little backed up lately. :/

[LowR3V'in]

he's shy now

[2mAn]

Give use your most bad ass m20 dyno and what u did to it.

Or just give us more!!

[LowR3V'in]

Give use your most bad ass m20 dyno and what u did to it.

[potatomash]

Cool thread

[MrBurgundy]

Do us dirty and post up a 3.xL if you got any :p

[ForcedFirebird]

Well used m20 we put a fresh head, 272 cam, Extrudabody ITB's and MS PnP ECU.

[ForcedFirebird]

subscribed.

I need to go through that checkup. Am I crazy for thinking that 140-150whp is actually pretty good for a used M20?!

I want to dyno mine soon just to see what a "200k" M20 with a sssquid chip & 19# Injectors makes

Chips see about 5whp/tq gain on an otherwise stock motor. The injectors don't do anything for power, the m20 doesn't over tax the stock ones. ;) I would say 145whp is an average for a stock used m20. Healthy m20's in Spec trim (open 2.25" exhaust, no accessories) make low/mid 150's, our in house Spec engines go into the upper 160's. One local has our Spec engine in his endurance car and it's well over 170 with headers/exhaust and chip.

Any interest in having other peoples m20 dyno plots here (with engine description) or would you like to just have yours?

Wouldn't hurt to see others. I've just been using the same dyno for about seven years now, so there's no variation on these.

[ForcedFirebird]

A well used m20 we put a fresh head, Racing Dynamics headers and a nice exhaust. This is before/after chip tuning. As you can see the peak power moved only slightly, but power under the curve is increased.

[ForcedFirebird]

Here is an eta 2.7 with 885 head and 272 cam a client brought in to chip tune. They normally make a tad bit more that this, but not by much (~135hp/150tq or so). As you can see the top of the graph gets bumpy, which indicates an ignition issue, so we didn't waste the dyno time. He never did come back before selling the car.