Got to looking for sources for a possible future hi-po head purchase. Went to several web sites, and compiled the following... presented for everyone's reference. Some details were a bit sketchy to me. Hope vendors can add some details here. Keep in mind, each vendor/manufacturer has their own techniques and designs... arguably this could be comparing apples to oranges.

Mini Mania $1895 - The add reads as essentially a street port job w/ no perf cam. $2495 - Comp port w/oversize valves w/ no perf cam.

Mini Madness $1849 - polish/port (street? comp?) stock valves, add $500 for perf cam. Big valve version uses 2mm oversize valves & $$.

PiloRacing - $1880 - polish/port (street? comp?), oversize int & exh (.5mm over intake, 1mm over exhaust) valves. Perf cam not included, & adds $475 to cost. At least 3 variations available ranging in price Full-on race head @ $1900. See Dan's post below.

Seven Ent. - $1899 - sketchy details on specifics. Believe a its street port with stock valves and no perf cam.

Webb Motorsports- $1705 - Port, oversize int & exh valves (1mm over intake, 2mm over exhaust) and perf cam included. Available in Street or full Race versions. Differences being the cam and optimization for either high or mid range powerbands. See Randy's post below and check out the link... the last page and a half have some great coverage of the Webb Motorsports heads. See Randy's post on page 2 of this thread for tech data and many photos.

"The Old One" Endyn - I don't know much. Perhaps JLM can chime in. Believe he charges by the hour per job, and will do whatever is requested, which will drive the price. Best example ran about $1400 directly from Endyn.

NewMiniSport S/E Big Valve: 481.06 UK Lbs (~$898) w/out VAT tax. 565.25 (~$1,055) w/VAT tax. New "larger" valves, guides, stem seals, and springs included. No cam. Also have a non-"big valve" version available for cheaper.

Feel free to add sources... or send me a PM and I will add to this post.
cheers,
Chris

 

I paid about $1400. that included the larger exhaust valves and full assembly, with spring heights set. A definite advantage going right to the source. stock cam.


Endyn just announced he is going to custom design and have made a mini cam.

 

JLM, is this the same design that BMW bought from him? Or do I have that confused with a different project of TOO's?

 

not sure; but it is what he developed using my head with whatever additional mods he might have come up with since.

 

I would say the two best out there off the shelf would be Randy Webb and Pilos head. The otherones are much more expensive with less features. Randy's is at a very good price, especially with the included cam. I do not know anyone with either one, but I would recommend talking to both of these vendors to get a feeling for what they offered and the work they did on their heads.

 

Do any one have any information on how the JCW head flows compared to a stock head.

What type of porting work was done on the JCW head?

I am looking to build a car for a class that only allows very minor porting and I am wondering if it is worth the money they are asking for the JCW head.

 

Here are some diffrent head packages that we have as well as some items that can be added to each level. For a more comprehensive listing of each level, please visit http://www.piloracing.com/shop/Mini-...inder-Head.php
We do not provide a cam shaft in any package, but Schrick Cam Shafts are available as an upgrade for $475.


Oversized valves are only included in the Race 2 Version, but can be added to any level for only $310.

We are the only ones offering Titanium Valve Retainers that will lighten the moving weight of each valve, as well as increase the seat pressure which is recomended when porting the valves, or changing to oversized valves for a better valve seal. These cost $180.



Street 1 Version is $1000

Race 1 Version is $1450

Race 2 Version is $1900 (includes larger valves)

As stated there is alot more info on our site (Link above) so please stop by there, or send me an e-mail Dan@piloracing.com

 

Dan,

Have you had a lot of customer's buy your heads and/or parts? Some of you stuff looks exciting, but we haven't really heard much from customers who have bought these heads. Can you pressure some of your customers to post. It seems a lot is being posted by the vendors on these units, including quite a few from you and Randy, but no one is really giving any feedback on these items. I am thinking about picking up a second Mini for fun and am intersested in some of these items as well.

 

I'll have some customers post. We have had several customers with very good results. We are working with one right now that is running nitrous, but is having fuel issues. We are researching 520 cc injectors for this solution. I will let you know how it goes. We plan to get his rig dyno'd to see the results.

 

Pilo...

Your fuel issues could be very easily solved by using our 400cc units, absolutly
no driveability issues/ECU problems. The 400cc units fits perfectly in the fuel rail,no machining or other fitment issues.
If need for larger flowing units exsist we will build custom units that meets
anyones desires at no extra cost.

For more info please feel free to call us at Team M7 at 562-712-3270


peter

 

They are already running M7 Injectors......

 

Tell me why you would need 520cc injectors, and why 400cc is not big enough.
And also if you would, tell me what kind of fueling issues you are having...
And also how are you planning to control the 520cc units/fit them.

peter
Team M7
562-712-3270

 

I'd like to see some data as well; 520 is a s*load of gas

 

yep 520cc is factory x 2. don't wanna end up washing the bores!

jlm - do you have info on wiring the SAFC? thx.

M

 

The 520's are suposedly a direct fit with an adapter that has been tested on a Mini via the MFG. I have not seen them yet, or used them to verify this. The customer is running our highest level cylinder head, with oversized valves, ported intake, and throttle body. He keeps seeing a lean condition when running the nitrous, causing a CEL. The customer using his own calculations figures that he needs very close to the 520. We will be testing it prior to the customer using it, and are working to see how viable an upgrade this will be.

 

they drop right in, eh?

should be good for 400 hp, presuming the fuel pump and lines can keep up

 

Yep, those 520s are no doubt from a SRT4 with pigtail electrical adapters. It may idle ok for now, but 30,000 miles down the road you are at risk of poor running. Get a scan tool and see what fuel trim you're running: a big valve head (even with a pulley) doesn't benefit from such large capacity injectors, especially without proper tuning.

 

There's no way those will idle properly, even 440's are borderline..........
And these 520's will sqeeze in between intercooler and fuel rail ???????

peter

 

but isn't the customer always right?

 

Not to get off topic but it sounds like your customer is in way over your head.

My first question would be: What sort of nitrous system? Is it wet? Where's the jet(s)/nozzle(s) shooting?

My second question would be: How big of a shot? There's a lot of engineering that needs to go into a big shot. Its not really my area of expertise but I know theres lot that go in to making nitrous rich (lean?) charges mix properly.

My third questions would be: Who ported the intake? The A/F between cylinders can be WAY off if the mixture isnt homogenous in the manifold.

My fourth question would be: Is the "revised combustion chamber" designed for the mixture being delivered? I dont know all the specs of your DPR/Arias/PILO superhead, but was it designed for a big ole shot of NO2?

Good luck. Let me know how it works out.

 

Here's another link with a ton of info on the heads:

https://www.northamericanmotoring.co...t=33096&page=1

Hope that helps!
Randy

 

I have 440s on the twincharge and it idles fine

 

Yes it does....but you forgot that it's controled by the Apexi...

 

no it doesnt... .i can put it at 0% and it still idles fine

 

Thanks for the link, Randy. I remember that thread! Basically, 1st page and last page have useful aftermarket head data... middle pages go on, and on, and on, between the pro and anti JCW head camps. Good info on JCW head, I just got tired of wading through it for non-JCW info.

I really hope this thread remains dedicated to aftermarket (as in non-factory)head resources.