Dyne testing

[c2xejk]

I have finally found time to get my van on a dyne. I am pleased with the results, but I would like to find a stock (or nearly stock) 3L V6 (preferably with a 5-sp) to do some additional testing on a theory I have...

The testing would be free to you. You would get a copy of the pulls.

The dyne is in north central Indiana. (near Kokomo.)

Thanks
Ed Kelly

[Tim_K]

What's a dyne?

Do you mean a DYNO?

[jory]

so what were your numbers?

[c2xejk]

Dyne, Dyno, The humblerizer, whatever...

~25 hp (crank) over stock.

I can't believe nobody is jumping at the chance to put their car on a dyne/dyno/humblizer for free!

[LynX853]

nobody says dyne, its dyno, hence dynojet

[DustyR/T]

really? Those are interesting numbers. Hell if it were free in FL here I would be glad to try her out.

[roguetrip]

whats done to the 3.0?

I got a stock DOHC 3.0 stealth atx in N.E ohio but i can't make it to IN anytime soon

[DustyR/T]

so crank hp was about 166 and torque was what? around 210?

[Ondonti]

Quote:

Originally Posted by DustyR/T so crank hp was about 166 and torque was what? around 210?

probably less then that.


His WHP #'s are lower then james dempsey's. he did 150-160 depending on his level of mods when he dyno'd and was doing 175-185 tq but those are at the wheels not the crank.


BTW ED, why in the world did they give you "crank" hp numbers? Dynojets give WHP numbers. to convert to crank HP assumes you know the exact drivetrain losses which I dont think we can be accurate on.

choosing between 18-10% drivetrain losses makes a Huge difference in judging performance.

[c2xejk]

I also doubt torque was that high... (I don't have the hp and torque numbers in front of me.) The peak hp was ~5500 RPM I shrunk the ports and they are still too large!

Right now I believe the hp is limited by cam (stock) and the RPM limiter. I am debating pulling the heads and adding more epoxy or going with a different cam and ECU cals...


Brent, so what drivetrain losses do you think are appropriate numbers? While I am thinking about it, where were you getting you boost pressure reading from? (passenger side or driver's side port?)

[Ondonti]

Im getting it from the back of the reversed plenum (opposite of TB)


Personally I would kick the dyno man in the bals and ONLY get WHP numbers.

Those are objective numbers that can be looked at and compared as long as you are comparing the same type of dodge transmission.

I have NEVER heard of anyone getting crank HP numbers unless they were using an engine dyno.

[c2xejk]

Quote:

Originally Posted by Ondonti Im getting it from the back of the reversed plenum (opposite of TB)

That is what I was guessing. That explains a lot.

Quote:

Originally Posted by Ondonti Personally I would kick the dyno man in the bals and ONLY get WHP numbers. Those are objective numbers that can be looked at and compared as long as you are comparing the same type of dodge transmission. I have NEVER heard of anyone getting crank HP numbers unless they were using an engine dyno.

I never said the dyne operator gave me crank HP numbers...

[Ondonti]

sounds like a very unimpressive motor.

If you are dynoing that low I dont think fixing the intake port is going to help.

is the van bone stock with intake port work?

james was making 20whp more then that and he has the timeslips vs weight to back up the numbers.

[c2xejk]

First, I never claimed it "impressive". It is what it is.

Second, comments like yours are why I nearly didn't post anything.

I would guess my gain is about 20 whp. The gain could be larger since the dyne operator didn't seem to like to keep his foot in it all the way to redline during the first two runs...

The bottom end of the engine currently has over 235K miles on it.

I have not spent much time tuning it. This dyno run was more to confirm where I thought the engine was before I dig into tuning and make more changes.

I think there is much more that can be done with the existing heads. As I said, I think the current heads are being limited by the cam, RPM limiter and fuel curve.

[Ondonti]

Im not attempting to make negative comments about your experience, but mike has an obsession with stating the 3.0 runs 14's with 130whp which is physicaly impossible.
Mike uses his crappy dyno sheet to verify his claims about that even though its physically impossible

I just dont want to see you doing the same downtalk of the 12v. It pisses me off, especially when there is nothing to back up the dyno numbers.
There is a good 30-40whp difference between the 3.0's running 14's and the ones running high 15/low 16


Dyno is great for back to back mod testing or stuff you are doing.


Ive done enough research to know that 4v/cylinder isnt an upgrade sent from god that gives a magical 82hp which is what some people here think. I wish you the best of luck proving that.