Now it begins...

*Motown block 415 cui
*Eagle 4340 crank and rods
*JE forged -21cc pistons 9.0:1 comp
*Jegs 197ccc heads
*Accel Superram intake
*CC NX276HR cam 224/236 .544/.554 with 1.6 RR
*SLP 1.3/4 headers
*2600rpm 9.5" ACT convertor
*52mmTB (will upgrade to 58mm when I find one used for sale...)

9 psi intercooled boost by procharger...

Cam: I know the cam is pretty small but I wont rev beyond 6k and it must pass emission....

Intake: Seriously consider a HSR instead but havent decided yet! comments?

/N.

 

My combo is pretty close to that.

I'm using Edelbrock 60739 heads though and more compression since I'm NA.

I don't know anything about the JEGS heads you've chosen so can't comment on them. Post more info on the heads.

My camshaft is also a CC custom ground hydraulic roller, 275/281 advertised; 224/230 @ .050 .576 w/1.52 RRs intake and .544 w/1.6 RRs exhaust; had it ground on 114 LSA. Sweet Cam.

Jake

 

Pics of the heads is on my webpage...

Do you have a SR intake? Does the cam pull up top?

/N.

 

If Im not mistaken Jegs heards are manufactured for them by Canfiled right here in Ohio.

actually like 20min away form me..

 

There's more to pulling up top that just the camshaft. It involves the entire intake and exhaust systems, a deficiency in either one will limit the high RPM power. Remember the air pump analogy.

I used "Engine Analyzer Pro" computer simulation program from Performance Trends to help me in the selection of the camshaft I'm running. The program allows input of a LOT of engine variables (no wonder it costs $600+) that many other sims don't.

Since I was shooting for torque, not high RPM HP, I kept the duration on the short side and the LSA on the wide side, but I shot for as much valve lift as possible.

The sim shows HP peak at 5700 RPM.

No, I'm not running an aftermarket intake setup. I followed MadMax's lead and extensively ported the intake manifold, removed all but 4" of the runner dividers and opened up the stock plenum as much as I could.

I've had the engine up to 6375 in 2nd gear when I decided to shift; that was about 10% above the power peak and close to the limit of what a hydraulic roller can reliably rev to.

For my purpose, the cam gives the best of both worlds; works well over the entire RPM band, including excellent vacuum at idle for the brakes.

Hope this helps.

Jake

 

Yeah, I know....

My setup is build to rev max 6k I also chose a "small" cam for the same reason you did, overall performance and a nice idle..

Just consider to buy a HSR instead of the SR havent decided yet...

/N.