The Truth About JIM MOCK MOTORSPORT - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

Warrior · 08-02-2002, 21:49

Hi everyone
I have been reading the forums for a lot of time but just today i thought i better share this with everyone, because i've noticed the amount of attention that the Mocks are getting (with previous threads).

I've got an EL that i've keep stock for a while. But since seeing the ad. in the ford preformance mag... I got the DEV 3 kit done from Jim Mock Motorsport - only because of their "apparent" outstanding dyno results.

Their Kilowatt-Happy Dyno (that uses ink - like maybe the first dyno ever made) graphed that my car reached a peak of just over 140rwkw. (stock is 98-108rwkw)

Anyways i was really happy with the results, as you can imagine, BUT after driving it around alot lately (as its not my daily car) i've become very sceptical about the results. So i decided to get it dyno'ed else where.

125-130rwkw on 2 different dyno's other than Mocks.

edited by russellw - I have removed the rest of this post. Your point is well made without the balance and you have stated the facts as you see them. Please refer the comments below for a partial explanation of the apparent discrepanices. We have consistently taken the view that if you have concerns with goods or services provided these should be addressed with the party responsible before posting on this forum

Hobbes · 08-02-2002, 22:22

Rather then bagging out the company, I think you need to take an important lesson away from this - dyno results like that ARE NOT COMPARABLE. Two back to back dyno runs, before and after the modifications are made, can be useful in measuring the differences made be a specific change. There are masses of variables that will affect a dyno figure - like ambient air temp, air pressure, relative humidity, how well the dyno is veltilated, whether there had been a number of cars on the rollers before yours, etc ... I'd bet if you tried even more dyno's, you'd probably find that you'd get a similar figure from Jim Mock.

Chalk this one up to experiance, and put less faith in a dyno result claim next time.

MrBrock · 08-02-2002, 22:38

I think the only reliable way to see the before and after effects is on the quarter mile.

Its well known that the dyno isn't the "be all and end all" of performance measurement. There aint too many ways to cheat the quarter mile though, and yes there are also many variables on the quarter mile (amount of rubber, temps etc) too, but at least it will give the most realistic representation of your car.

Check the paper for the next track day in your area, generally cheaper than a stint on a dyno and more fun too.

cArSiK · 08-02-2002, 23:34

Warrior , with a GTech timer you can get an estimate of your rear wheel power +/- 3KW just by plugging it in and nailing it over 400mtrs. They are usually very accurate for the 0-100 times and 400mtr.They are about $380 new.
Worth a try maybe?
James

IPhido · 08-03-2002, 00:01

I don't think the 1/4 mile is faultless either! Some run down hill some up hills, some have gripper surfaces..

If you want to use a dyno properly you would get a BEFORE and a AFTER. Aslong as no one has fiddled with the dyno inbetween the two runs and under simular conditions, the diffrence between before and after (as a %) should be real.

As with *ALL* measurement there is a amount of uncertaincy.

XR_Strider_GuY · 08-03-2002, 00:11

I tend to agree with Iphido here, i guess what it comes down to isif the owner feels happy about the performance gains in the seat of there pants for what they paid for then one should be happy.

Warrior,
Do you feel a definite increase in power, or does it feel like bugger all difference.

Martin · 08-03-2002, 00:15

Quote:

Originally posted by IPhido
I don't think the 1/4 mile is faultless either! Some run down hill some up hills, some have gripper surfaces..

If you want to use a dyno properly you would get a BEFORE and a AFTER. Aslong as no one has fiddled with the dyno inbetween the two runs and under simular conditions, the diffrence between before and after (as a %) should be real.

As with *ALL* measurement there is a amount of uncertaincy.

With 1/4mile, as long as the track is flat, the trap speed will be the same, or very similar no matter how much traction you do or dont have. (unless your wheelspinning the whole length of the track)

Speed is power
Time is traction

Martin · 08-03-2002, 00:22

Oh and for the original topic of this post, doesnt Jim Mock only quote themselves 135RWKW from the DEV3 on a manual car?.

If your is an Auto then thats going to make 5% less.

Perhaps the 140Kw was some sort of freak, so take it back to them and see what it gets again. And what did it dyno stock?

laminge · 08-03-2002, 00:30

I am happy that this thread has appeared, it is an issue that has been raised several times

I agree with Russell's edit on the post

I havent visited Mocks workshop, but would alow him the chance to respond on the forums

Bass Crazy · 08-03-2002, 00:44

*Bass Crazy Patiently awaits 1/4 mile runs*