Drivetrain Head Comparison
Your quest appears to be absolute so that requires an absolute answer.
IMO, none of the above, well maybe that's a little harsh because they are supporting the MINI go faster effort and this site. ( getting down
)
But if you really want a MINI head optimized you should check out ENDYN Energy Dynamics. This guy is a tuner > http://www.theoldone.com/about/default.asp
If you want to see his work you may have to sign in, then look here;
http://www.theoldone.com/forum/topic...80&whichpage=1
)But if you really want a MINI head optimized you should check out ENDYN Energy Dynamics. This guy is a tuner > http://www.theoldone.com/about/default.asp
If you want to see his work you may have to sign in, then look here;
http://www.theoldone.com/forum/topic...80&whichpage=1
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.
Here's a shot of it:



Here are some of the flow bench shots:




Here are our other pieces which have been on the market with good success for some time now:







All of these work well together, and the header is a recommended upgrade with the head as well. Upgraded injectors may be needed, and if they are, you also need to upgrade the ECU to take advantage of them. This project may end up costing a bit...
As a side note, we looked at the black intake to the supercharger as well, and found that as long as the flashing and all is cleaned up nicely, the unit flows pretty well. That surprised me if you have ever seen the cross section.
Let me know if you have any questions.
Randy
720-841-1002
www.webbmotorsports.com
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.
Here's a shot of it:
Here are some of the flow bench shots:
Here are our other pieces which have been on the market with good success for some time now:

All of these work well together, and the header is a recommended upgrade with the head as well. Upgraded injectors may be needed, and if they are, you also need to upgrade the ECU to take advantage of them. This project may end up costing a bit...
As a side note, we looked at the black intake to the supercharger as well, and found that as long as the flashing and all is cleaned up nicely, the unit flows pretty well. That surprised me if you have ever seen the cross section.
Let me know if you have any questions.
Randy
720-841-1002
www.webbmotorsports.com
Originally Posted by RandyBMC
my $ is on a guy who has personally flowed and ported thousands of heads, from Roger Penske, GM, etc. over the last 40 years, built his own state of the art laminar flow flow bench, engine dyno room, you name it and is a total engine builder with his own full shop equipped with Sunnen boring machines, Serdi grinders, 5 axis CNC mills, etc.
If nothing else, go sign up for his BBS and start getting educated. read his article on building the 2 liter engine for starters; its like a hospital surgery room
www.theoldone.com
If nothing else, go sign up for his BBS and start getting educated. read his article on building the 2 liter engine for starters; its like a hospital surgery room
www.theoldone.com
Last edited by jlm; Jan 7, 2005 at 12:21 PM.
Trending Topics
Originally Posted by onasled
..... ummm , yea, ....why haven't you answered my emails ? 

I'll call you right now.
Randy
Originally Posted by RandyBMC
I responded two days ago - I gave you a price quote and even mentioned the crank pulley!
I'll call you right now.
Randy
I'll call you right now.
Randy
We have sold many heads that are built by our partner www.dprracing.com Check out their site, and also the link on my signature. They have been porting and flowing heads for over 25 years, developed parts for TRD (Toyota Racing Development) and many rally, road, and land speed race teams across the world! Our lowest version makes a huge 13HP with the stock valves, the same as others make with oversized valves and a cam shaft.
Good luck with your car
Thanks
Dan
Pilo Racing
Good luck with your car
Thanks
Dan
Pilo Racing
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