Originally Posted by Johan

What I would like is to increase torque thoughout the powerband. I don't a motor to only make hp at high rpm...running a 19% I don't think that would be very efficient. I thought that I read somewhere that lowering compression a little will help reduce knocking and from loosing timing. I looked for the thread but couldn't find it. Maybe I'm wrong if so I will tell Seth (my machinist) not to worry about it. Like Matt said it's a never ending quest to keep timing from backing off.

I called Endyne a while ago and asked about cams. The responce that I got was that they were so busy with other things that they put that project on the back burner for now. Also when I called, the person I talked to wasn't that helpfull so I ruled them out. Maybe a good place to get some parts from.

I did look at the Ultrik cam, it's the same as schrick and I think they even say that somewhere. It's a little cheaper I think.

Anyone know what size over valve Randy uses on his head??

Also what is the compression ratio on a MCs?? I did a search and got anywhere from 8.3-10.5:1 Anyone know for sure?

What do you mean Obe, I want it ALL. I still need to finish my other project that you seen. LOL

Thanks again for everyones input -- Johan

Originally Posted by Randy

I'd put my head up against anyone's. I am that confident. I also warranty the head for 2 years/24,000 miles.


Here's a bunch of info on it:

We are flowbenching every head we do - and we've found all sorts of little tricks to make more power in the head. It isn't just in the porting either. We're now using larger valves than the "larger valves" most of the other guys are using, and our valve job is a bit different as well. The flow bench numbers come with the head when you buy it, so you know exactly what you are getting.


Here's a flow bench test from one of the heads with the old "big valves" - expect a little more flow on the exhaust side with the new valves (I sent that head flow chart to the buyer though).

For the bench numbers, we are using 28 for a pressure drop, and the stock peak numbers are around 120 for the exhaust and 170 for the intake. I haven't done testing with the head not using a cam, as the porting is based on the lift from the new cam, but other than that, I have done dynos with everything else being as equal as possible. The issue is the dynos were done on different days (I had to install the head after all), and I had to try to get the temps the same with the Scan Tool. Dynoing the MINI isn't easy! I've also had customers dyno their own cars, but obviously I have no idea what control was like.

The numbers range from 13 to 19 horsepower on average depending on what other items there are. With the fuel injectors, ECU and other flow items addressed, on a Dynojet, I'm seeing over 20 (but not much over 20).


Final numbers:
intake lift cfm
.050" 52.8
.100 81.7
.150 109.3
.200 138.4
.250 166.5
.300 188.6
.350 203.2
.400 210.7
.450 214.0
.500 214.8


Exhaust lift cfm
.050 50.7
.100 83.5
.150 117.7
.200 141.3
.250 154.4
.300 160.0
.350 162.3
.400 163.4
.450 164.7

You'll note that it says final numbers - that's because we port then take it to the bench, then port some more, then back to the bench, etc. That gives us valuable data to make sure we keep going in the right direction.

Here are the numbers with comparisons to stock using one of the first heads we did - the numbers are higher still now that we've learned more.

They are stock, 1mm oversized, and 1mm oversized ported.

lift __int stk __1mm stk __1mm ported __exh stk __1mm stk __1mm ported
.050 __32.7___49.3_______51.7________31.0_____29.7_____ _44.7
.100 __66.2___82.6_______84.2________51.4______45.0____ __82.7
.150 __98.2___110.4______111.1_______76.9______81.2____ __113.6
.200 _127.4___136.2______149.4_______97.5_____106.9____ __137.9
.250 _153.0___160.1______176.1_______106.0____120.1____ __151.4
.300 _169.1___179.3______195.5_______111.0____126.9____ __158.6
.350 _174.3___182.3______205.8_______113.0____130.2____ __160.6
.400 _175.7___191.0______209.5_______114.5____132.1____ __162.6
.450 _175.3___193.4______211.0_______115.9____133.2____ __164.3
.500 ___________________215.7__________________________ _166.3

The ported values go higher due to the additional lift of the new cam. This is the street head, and you can see the great increases we got in flow at the lower lift values. The race head has higher flow numbers up top, but not as good at lower values.

I also have two different heads - one is ported for outright top power, the other for drivability. Two different cams are used with those as well.

Finally, our head includes the cam - for $1705, making it the biggest bargain on the market.

Originally Posted by dmh

I just finished up some R&D on three different heads. You talk about expensive! Though most of the data is proprietary I will share some of my knowledge to those wanting to do it themselves. Just contact me at the below address.
For those interested in purchasing my cylinder head (it is listed on my web page) turnaround time is approximately 5 business days plus shipping time (a few days). You’ll need software as well.

Originally Posted by minti

what do you think of this:

http://www.saclam.com/mini_kumi/01mi...kumi_head.html

wrong language but nice pics

Originally Posted by 04SDmini

Let us know what the final cost was as well!

Originally Posted by minti

what do you think of this:

http://www.saclam.com/mini_kumi/01mi...kumi_head.html

wrong language but nice pics

Originally Posted by Johan

Just thought that I would post an Up-date.

First off I would like to say that there are many different flow numbers being thrown around for the stock mini head. Some of which are not even close to what a stock head flows(I won't mention the vendor). I'm sure it's just a marketing gig. The numbers that obe got for me from Randy's head jive within 1 or 2 cfm from what I've got. So thank you those numbers are proving to be very helpfull.

The machinist is very impressed with the stock mini head, quality wise. Compared to other heads that he has done (even the m3)

We have the exhaust finished and are finishing up the intake this week. He also told me that he broke 2 bits on the head already.

I'm going to install it next week and do a before and after dyno run (on the imfamous mustang dyno) Included with the head is a new shrick cam and a software up-date from MTH.

Should be a good time! I'll be sure to share my results -- Johan