JMM High Comp Pistons

[mad_keen]

Anyone else see the article in street ford? JMM forgies 11.5:1 12.5:1 compression.

Have to say theyre bringing out some nice stuff.

http://jimmockmotorsport.com.au/index.p ... Itemid=486

[67rce]

11.5:1?
JMM specs are:
Compression ratio:

Using .025” thick JMM triple layer steel head gasket

Deck height .015”

Head volume 62cc 10.3:1

Head volume 64cc 10.0:1

Head volume 68cc 9.6:1

[mad_keen]

Yer i cant find it on the site but thats what it says in this street ford mag i have in my hand

[mad_keen]

JMM 4.0 SOHC 12:1 comp extreme performance Forged piston
Light weight undercut, minimal skirt design
Full friction coated
Made from MAHLE race core technology
Specifically designed for 4 liter combustion chamber
Compression from 11.5:1 with 68 cc chamber to 12.5: with 62 cc chamber, using JMM head gasket .025” thick
Nominal piston size is .020 oversize from std to maximize bore integrity
Fully floating heavy duty pin .866” dia for bushed floating rods
Supplied with latest technology ground Steel nitride ring set for extreme duty racing
Intake and exhaust valve reliefs
015” deck height built into piston
Piston and pin total weight per unit 440 grams

[mad_keen]

[superhuS!]

And they're going to cost you your left testicle. Possibly your right one too.

[67rce]

And they're going to cost you your left testicle. Possibly your right one too.

$1450. So about similar to E Series CP's.

JMM 4.0 SOHC 12:1 comp extreme performance Forged piston
Light weight undercut, minimal skirt design
Full friction coated
Made from MAHLE race core technology
Specifically designed for 4 liter combustion chamber
Compression from 11.5:1 with 68 cc chamber to 12.5: with 62 cc chamber, using JMM head gasket .025” thick
Nominal piston size is .020 oversize from std to maximize bore integrity
Fully floating heavy duty pin .866” dia for bushed floating rods
Supplied with latest technology ground Steel nitride ring set for extreme duty racing
Intake and exhaust valve reliefs
015” deck height built into piston
Piston and pin total weight per unit 440 grams

Not what JMM have on the web. I'd go net specs from JMM over what is in Street Fords.

[mad_keen]

That's straight off the jmm site dude. Go to the side. Race purpose parts or some shit then pistons and rods

[BROCKYB8]

Pretty sure i read on fb that one of there street NA cars will be getting some of these too

[Mr. CVE]

$1450. So about similar to E Series CP's.

Yeah but you can't compare the 2, CP are a very nice piston, very well made, and much stronger for the weight.