Comp cams

[Don Jacks]

While checking Comp's site for a small block grind I noticed that they now list 3 hyd.roller Extreme Energy grinds.One perfectly suited to a warm,cast piston equipped stock stroke 348,one for a hotter 9.5-1 cast piston motor[348 or mild 380,and one that would be much hotter,would require forged pistons but would be a great hot street,mild strip grind for a 380 or stock stroke 409.Heretofore all that they had listed for the W was the Thumper junk.I view this as good news.

 

[427John]

Don would that cam be good for a mild 348 4" stroker also?

 

[Don Jacks]

On an engine of that size I'd use the largest of the 3 grinds at 230 - 236 at .050.The middle grind at 218- 224 would be too small.Yes these are great milder engine combo cams.

 

[Don Jacks]

Cam Type:Hydraulic Roller
Lifter Style:Hydraulic Roller
Camshaft Series:Xtreme Energy
Camshaft Gear Attachment:3-Bolt
Usage:Street/Performance
Valve Springs Required:Yes
Camshaft Material:Billet Steel
California Proposition 65:WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov
Advertised Intake Duration:266
Advertised Exhaust Duration:272
Intake Duration at .050 Inch Lift:212
Exhaust Duration at .050 Inch Lift:218
Intake Valve Lift:0.536
Exhaust Valve Lift:0.543
Lobe Separation:110
Assembly Lubricant Included:
Stock stroke.9.5 cast piston 348/mild 380]sneaky 340 horse 409.

 

[Don Jacks]

RPM Operating Range:1,400-5,800
Grind Number:XE272HR-10
Cam Type:Hydraulic Roller
Lifter Style:Hydraulic Roller
Camshaft Series:Xtreme Energy
Camshaft Gear Attachment:3-Bolt
Usage:Street Performance
Valve Springs Required:Yes
Camshaft Material:Billet Steel
California Proposition 65:WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov
Advertised Intake Duration:272
Advertised Exhaust Duration:278
Intake Duration at .050 Inch Lift:218
Exhaust Duration at .050 Inch Lift:224
Lobe Separation:110
Assembly Lubricant Included:No
Reviews

TECH SUPPORT

• Launch Instant Chat
• Cam Recommendation
• Warranty Registration
• Careers
• Site Map

LATEST NEWS

• Read about the newest product launches from our development team.
• Watch the latest product and technology videos

This is a hyd.roller version of the good old 0950 hyd.flat tappet.Largest you can use without notching the 9.5 cast pistons.

 

[Don Jacks]

RPM Operating Range:1,800-6,200
Grind Number:XE284HR-10
Cam Type:Hydraulic Roller
Lifter Style:Hydraulic Roller
Camshaft Series:Xtreme Energy
Camshaft Gear Attachment:3-Bolt
Usage:Street/Strip
Valve Springs Required:Yes
Camshaft Material:Billet Steel
California Proposition 65:WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov
Advertised Intake Duration:284
Advertised Exhaust Duration:290
Intake Duration at .050 Inch Lift:230
Exhaust Duration at .050 Inch Lift:236
Lobe Separation:110
Assembly Lubricant Included:No
Forged piston required,good mild street stroker[big inch] cam,with the right set up,mid-low 12's from a stock stroke 409 possible[Ray's[Fathead RACING] already proven this.]

 

[Apache 59]

Does anyone know the cam centerline on the XE284HR-10, my guess is 106, but Comp Cams doesn't say anywhere that I can find.

 

[La Hot Rods]

My guess is 110

 

[Apache 59]

Most of comp cams, but not all are ground with 4 degree of advance. I'm trying to design my engine to closely resemble the Edelbrock 2268 cam, but with reduced lift and a little added duration to make up for the loss of lift and still keep the same overlap, give or take 1 degree. Don't know if this XE284HR-10 is it, as is, or to have Comp Cams custom grind one. This XE284HR-10 has a much faster ramp speed which would help with the loss of lift. I think the Eledbrock 2268 cam lift might be an issue with the 348 cylinder bore and having to clearance the block.

 

[La Hot Rods]

When I looked up the number in the catalog it shows it in 110. Now the catalog doesn't show 348/409 engines but the grind is the same for small and big block engines.

 

[Apache 59]

Thank you for taking the time to research it. I think the 110 you are see on there website is the lobe separation angle (LSA). That is different from cam centerline. If the 110 LSA and the cam is ground with 4 degree advancement you would end up with a centerline of 106. I will e-mail them and should hind out something on Monday. I was just hopping someone already have purchased that cam and have the cam card.

 

[La Hot Rods]

You are correct, sorry.

 

[boxerdog]

Are those Comps standard firing order?

 

[Apache 59]

yes, but you can get them in 4 -7 swap in a custom grind

 

[Don Jacks]

Unless recently[2 years or so]changed the centerline on that cam is 106.You can verify this durrng mock up.Akll Extreme Energy Chev.cams are marked as having a 4 degree from LSA.

 

[Apache 59]

Thank you, that is my assumption too.

 

[32witha409]

My comp roller is ground @106. Used the 0 key on timing set and she degreed right on 106.