Markert Motor Works Dyno Thread (many inside)

[digger]

i'm interested in the specs of the engine it makes more power and torque above 4k than most 2.8L strokers....

[328ijunkie]

sent you guys an email about reflashing my 02' M coupe Clownshoe....Has a Shark tune on it, but it sucks ass, and the car isnt running right

Look forward to it

Dave you guys offer remote tuning correct?

Yessir

How high was the compression on this? Thats pretty damn impressive

12:1

High enough to use 98 octane which smells so great. 12.5:1 I'm gonna guess.

lol.. Converted it to E85 a little later too.

[2mAn]

12:1

lol.. Converted it to E85 a little later too.

This is awesome, Im really thinking the next motor will be a 10:1 M20. I think that will be a daily friendly car that will take the best we have available here (91oct). Im hoping its not too high of a CR for these old motors

[digger]

Look forward to it

Yessir

12:1

lol.. Converted it to E85 a little later too.

What were the other specs/ what else was done to the engine ?

How much gain was there from e85?

[M-technik-3]

E85 is more stabil and has less propensity to ignite early which is why FI cars run so much better on it. But it does have drawbacks finding it, cost more than regular fuel in my area it cost more than premium aka 93 octane. Limits where you can drive unless you have an ecu that you can switch tuning maps.

[AFDanHef]

I combed through most of your graphs and didn't see what I'm looking for but maybe I missed it ... there's really ALOT to look through now! lol ... I'm doing an M52B28 stroked to 3.0L w/ M54 crank, rods, pistons. Plus M50 manifold, S52 cams, eBay headers and a full custom exhaust.

I saw a lot of M52 w/ M50 manifold, S52 graphs but I didn't see any M52 stroked 3.0L graphs ... have you dyno'd any stroked M52s? I'm really curious to see how much hp the extra displacement will afford. :popcorn:

[nando]

S52 is pretty much a stroked M52. So it's going to be pretty similar. The only other real difference are the cams.

[Sh3rpak!ng]

I combed through most of your graphs and didn't see what I'm looking for but maybe I missed it ... there's really ALOT to look through now! lol ... I'm doing an M52B28 stroked to 3.0L w/ M54 crank, rods, pistons. Plus M50 manifold, S52 cams, eBay headers and a full custom exhaust.

I saw a lot of M52 w/ M50 manifold, S52 graphs but I didn't see any M52 stroked 3.0L graphs ... have you dyno'd any stroked M52s? I'm really curious to see how much hp the extra displacement will afford. :popcorn:

probably close to 95' s50 3.0 power?

[AFDanHef]

I'm expecting/hoping for S52/S50 power. I'm just looking for some confirmation. I've got S52 cams, so I basically have an S52 then. Also, my M52 is from a Z3 so I have an aluminum block S52!!!! :D

[Jaker]

You'll be short about 200cc (.2L) for an S52 like build/power. As Sh3rpak!ng stated, it'll be closer to S50 power, though the S50 has a shorter stroke but larger bore than what you're building. You'll likely see a little more torque but slightly less top end power than an S50.

And welcome to the aluminum block single Vanos brotherhood. My built Z3 M52 aluminum block motor with S52 crank and 84.5mm bore 11.5:1 compression pistons as well as a bunch of other bits makes 270whp/240ft-lbs torque on a Dynbojet.

[2mAn]

Where was my invite to be Aluminum Block brotherhood? Haha

[328ijunkie]

Most of the 3L strokers I see using m54 parts make low power...

[digger]

Might be shrouding issue with small bore.

It's never a good idea to run small bore long stroke when the same capacity can be had with more bore and shorter stroke

[ForcedFirebird]

It's never a good idea to run small bore long stroke when the same capacity can be had with more bore and shorter stroke

The most high RPM and HP:CC ratios have large bores, long rods and short strokes.

Ideally, if the piston can outrun the flame front, there is no time for detonation, but we will never see that in an m20 (or other close rod/stroke ratio engine).

[AWDBOB]

Most of the 3L strokers I see using m54 parts make low power...

How much power is 'low power'? Like, a few HP more than an M52 with the same bolt ons? This is an interesting discussion.