JPM heads, lets hear some feed back please

[Rocket Ron]

I got to see these at EBI this year and they looked very good quality. I have noticed that the cars running them seem to be pushing out some impressive figures for their cc size.

It would be interesting to hear your feed back if you are running these heads. What are the specifications of your engines and running temps etc.

It would be fantastic to hear from someone that has hp figures for your engine before and after fitting them.

[bang]

 here is a link

http://www.shoptalkforums.net/viewtopic.php?t=121444

i got them on my 2779 oxyboxer. can only say good things about them

[Petter Carlberg]

I´ve run my heads for three seasons now and are really happy with them. I´m runnig a 2332 with 51mm IDA´s, fk46. (will probably go for somethig wilder for next season) Up to now no issues with them, I love the heavy duty rocker assembly!

[Torben Alstrup]

I built a 2387 with a Web 251 cam and JPM heads, 1,5 JPM rockers. 225 hp. After the dyno pul we found a couple of minor erros which gave noticeable more power. So I´d say that it is over 230 hp now. It also "only" runs 11,7 - 1 CR at this stage. That will most likely be increased to 12,2 - 1 for the next season.
I can vouch for them.
T

[Tomi]

I have JPM heads in my 84 x 101.6 street engine with FK91/89 cam, 1 7/8 header and 50mm throttle bodies. Compression is only 10.5:1. The engine made 241hp @ 6950rpm and  278nm @ 4950rpm through restrictive muffler running very rich, lambda 0.69 at worse. After the dyno pull I mapped the engine, got the lambda up to 0.82 - 0.85, and now it pulls much stronger through the whole rev range. Next I will raise the compression to 12:1, change to better flowing exhaust and tune some more. I'm really happy with the heads, they stay cool and I got these numbers with "out of the box" heads, no porting or anything. I'm also planning to send the heads to Johannes and get them ported to whole new level.

[Rocket Ron]

wow some great figures there, you all seem to be running high cr ratios. It that because your also running fuel injection ?

anyone got these on a turbo car ?

[Roman]

The CSP Turbo Ghia has them!
http://blogsimages.skynet.be/images_v2/002/548/818/20080819/dyn006_original_640_480_jpeg_2548818_9140f38ceb06d46babdb7a6b4e311703.jpg

The reason many people has high compression on them is that high compression is free horsepower. If you build an engine with JPM heads you are looking for that extra and tend to go as high as you can.
JPM has 10.6 compression in his own daily driver 2276, making 222 hp.

[richie]

Got mine sitting here,but not managed to mate them with a bottom end yet,hopefully in a few weeks and yes they will be turbo

cheers richie

[bang]

cool richie.. what size of engine is that. where about do you live, i work neer norwich, do you guys meet up and talk race and kick tyres?

[Torben Alstrup]

Bang, Ritchie is from England. You know who he is. Think big wheelies in a vert´ 
T

[Lids]

Richie your heads looked like they should be auctioned at Southerbys.  A work of art, I hope you use perspex barrels so we can see them at work.

[Ragtop]

Hi!

I also got a set to my new racecar. They will be on a 2332 with autronic sm2 EFI, E85, Big turbo. Will be interesting how the combo will work out.

[andy M.]

just out of interest what is the price on a pair of jpm heads

andy

[Rocket Ron]

Got mine sitting here,but not managed to mate them with a bottom end yet,hopefully in a few weeks and yes they will be turbo

cheers richie

It I'll be really interesting to see what sort of power they make over your current heads. 

 How’s it going, any other races coming up on that side of the pond ?

[vwxtc4free]

just out of interest what is the price on a pair of jpm heads

andy

x2

Also is the black coating some sort of heat sheding coating also? Those throttle bodies are NICE also! The engine pic in the new Hotvws is also BADASS!