Perhaps you might post a dyno chart of the performance of the head?

 

I think I will have before and after dyno runs done.

My current engine mods will, I think, complement the new head. I have a 17% pulley, Alta intake, JCW injectors, cold plugs, JCW exhaust and MTH Tuner software. Adding the head and probably a cam will make for an interesting comparison.

It will probably be a month before the new head goes on. I have a new (stock) unit that will be ported & polished so as to avoid having "down time" while the work's being done, but it hasn't even gotten in the company's queue yet.

 

GREAT idea (before and after dyno runs)!

I would be very interested to learn about your results. Especially if you can run 91 octane pump gas with your set-up.

Please post the results when the head is on the engine.

 

there has been a few Cosworth heads sold in the past few days.... I'm sure we will get some feedback on them.......

 

Just waiting for the promised dyno.

 

I think both of us in this area may be expecting Vince to do the install at Harrison.

I'm having the head and dfic sent straight to the shop. Vince will be going in for back surgery, so I'm trying to get it done in time.

Sorry no slot available for a before and after dyno.

 

We recently flow-benched 4 different heads: Stock, a John Cooper Works , MINI-Madness Stage 1 Head, and a MINI-Madness Stage 2 Head. The attached link shows the results in a data and a graph format (bottom of the page).

http://www.mini-madness.com/index.as...PROD&ProdID=64

 

Please explain so i understand these numbers are giberish to me:

Why does the Madness Stage 1 out flow Stage 2 on the intake side?

Why is there such a huge difference between exhaust flow on Madness stage 2 and the other 3 heads.

My setup is header, exhaust, DFIC, all bolts on basically with a Unichip to tune. I would really like to add this M62 kit if it makes it to production. Based on these mods plus the fact it's pretty much beaten daily on the streets with little to no track and drag which head would you guys recommend for me? Also (I know it's a bad question) roughly what kind of power can i expect from a setup like this.

Thanks fella's


Seann


And thanks Steve for taking the time to post this data for us.

 

Click on the link below to see data from a stock head and our Precsion-Mini/MTH head.
http://www.precision-mini.com/MiniTuning.html

 

I had the same questions as you regarding why the stage 2 is " outflowed " by the stage one.

Now I have a even bigger one after looking at DMH's chart. Why in the Madness test their numbers for the stock head are so much higher than the numbers that DMH got in their stock head test. Why would the baseline be so different when they were testing the same piece?. Am I reading something wrong ? Whos numbers should we beleive, if any ?

Numbers, you cant trust them LOL

Mark

 

You need to better understand numbers. You are not comparing apples to apples.
Flow equipment is not all equal. If you read closely I used the industry standard 28" as opposed to 25". Atmospheric conditions play a role as well.
My exhaust numbers were close to those of http://www.chrracingproducts.com/
but my intake numbers were higher.
The kind of head you want will be dependant on your wants. Ask questions and choose wisely...

 

Thanks for clearing up the reason for the differences in these two tests. So because they were tested to different parameters you are saying that they can't be compared as you said , apples and oranges ? If that is the case how do we compare products to try and make our best decision . I'm not trying to be a pain in the *** and you have already presented some good info. If you used the industry standard why would anyone else not use that at well? I would think a industry standard would be just what it implies ,the STANDARD for the industry.The info would be much more valid had that been the case. Again thanks for that bit of clarification it was confusing to say the least.

mark

 

like so many things in life, it's not so.... Just like the two data sets above show. One way that can help you wade through the mire is to look at % gains instead of absolute numbers.

Just a thought.

Matt

 

You can Google for "flow bench cylinder head industry standard inches" and 28" will usually be it. It has been 28" since I can remember (20+ years).
When comparing heads what you are looking for is area under the curve. I don't have a scanner so I didn't post the result. Just plot the coordinates in a proper program and it will figure it out for you. Just don't look for max flow. And as Dr. O says, compare on a percentage basis.
Other parts to consider are cams, headers, and software. For without an ECU remap you will never see the potential of your modifications.

 

I my line of work I have been around, hung out, had a beer with some pretty smart people..... one of my fortunate aquaintences is (and I haven't seen him in a long time) is Dr Eugene Patronis of GA Tech. Dr. Patronis is legendary.... He is kind of like Willie Nelson with a PHD in physics. Any way his News Years Eve tradition is to re calibrate all his test equipment..... one only needs to be around or do a lot of testing to see why I say this......Matt is exactly right look for %+/- absolute numbers are .... well....... "relative" .....as well.

btw.... I don't think the highest flow is necessarily what you want.... you can flow yourself out of hp and torque.....learned that the hard way

 

Thank you Bob.....

It's amazing that the only criteria for head performance discussed
here is "flow".

Limited torque capabilities and very lazy throttle response, coupled with
Fire hose flow will only magnify the above problems, and consequently
Lead to a very unsatisfactory daily ride.....

If we would have a head that has excellent flow with superb gas velocity
All the above concerns are lessened by a magnitude.

Our Cosworth head took all these concerns in to account for. Great drivability, extremely flat torque curve, with excellent throttle response.
And power to please......

peter
Dream M7
562-608-8123