Not dimples but what is really used. I was lucky enough to watch some of the original flow testing done.
Riblets . And no, you don't eat them.

 

Sorry Randy but in this case I can honestly say that you have not tested the
Cosworth head as we installed all but one, and that one I know fore sure did not go to you for testing. And I would say with certainty that higher cfm on the bench does not equates to better driveabillity or HP.
The Cosworth head will have a new price as of next week, new price $1299.00 and our new cams will be priced at < $420.00 which will put the
head cam combo at approximately $1720.00.

peter
Team M7
562-608-8123

 

Free enterprise at its finest. Any lower bids?

 

This is very true, everyone, as that one head is safely, happily, and discretely residing in my car. It does not leave my sight. Hell, I had a bed made just so that I could sleep with it under my pillow! . Unless if those UFOs.... :impatient

 

Hmmm....

 

They were mine. Sadly, they're not hosted anymore. There were too many to fit in my gallery. So...

 

I just finished porting me head and i install bigger valves while i was in there. I'm going to port another head and post pictures of it within a few weeks.

 

.......so i wonder what other cosworth head Randy is speakin' about????

 

He has never seen one, nor _tested_ one, to my knowledge [read: mine has never been to see him ].

 

Is it not possible that Randy has dyno tested one of these?

 

impossible, at least never on the same dyno or with the same configurations...

 

I've been looking for this thread awhile, some time ago these were the first pictures of the JCW head porting job.
Maybe others will put some head porting pictures up here. Sadly more than a few who posted on this thread are gone now.

 

Wow Norm. This popped up in my email. Long time.

 

obehave, Yup I 'm still hangin. It's getting around time to freshin the MINI up with some DIY head work and stuff.

 

Nice to hear. I popped n to see of there was any updated on header/cat combos. Time to replace so I thought I'd go for an upgrade.
Been out of touch some so any info would be greatly appreciated.

 

A revised cyclinder head will be on the shopping list for my old challenge car when I figured out the best way to cool the inlet charge - so many options with no clear winner. When I do go down that route here in the UK I'll most likely go to this chap who built my brothers race engine:
http://www.guy-croft.com/
I've just started reading his book - wow! think you know about modified production engine tuning? Think again!
For the American heads, are there any achieved flow figures about? Interested to compare, not neccessarily with other tuners but, with other engines.

 

I'll flow test any head anyone wants to put up for comparison at the harley shop here. I'll even cover shipping both ways. (I have a stock '06 S head already in the machine shop for a base line)

One thing to remember is that high flow volume numbers are only part of the equation of power. You also have to keep air velocities up.

As to cooling the inlet charge (and other thermal/friction control stuff) look at swaintech I believe onasled used them for his race car but I could be wrong, they mentioned a race mini last time I called them and asked about TBC pricing for a mini head/valves.

 

I'm thinking what Guy Croft said: "All the power is in the head." True, true.