Cam Upgrade for my 408. Need some advice.
I am looking for a few more ponies and am considering a cam change to a solid roller, in my LA 408 Stroker that will get me into the 510-520 hp range, and to flatten out the torque curve a little too. Really leaning towards a solid roller cam.
408 stroker LA, 10:1, trickflow heads, Super Victor intake with Edelbrock Proflo4 fuel injection. Howard’s hydraulic roller cam, photo attached of the specs for the cam. Edelbrock super victor intake, TTI step headers 1 5/8 to 1.75.
Cope low gear 904 RVMB w/ lockup and a PTC 11" converter.
8.75 w 3:55 Sure grip.
It pulls 16lbs of vacuum at idle and runs on pump gas @ sea level ..
497 torque and 448 hp. This was dyno’d with an airgap and some small tube headers.
Any advice will be greatly appreciated!!
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You said 10:1 pistons, do you know the part# or how much valve lift they can clear?
You never mentioned the Rocker ratio?
Another thing about your compression, do you know if it's 0 Deck or the head gasket thickness? Don't know if you could bump up the CR with a tighter quench.
I been looking at alot of hydraulic roller to solid roller dyno comparisons. I saw one that they were getting the same vaccum with a 9* degree larger solid as the hydraulic roller. This could mean that you could run close to a 240+/- solid roller cam and be close on vaccum. Most are on a 110, so a custom would be needed to maintain the 112 lsa.
My original thought was that you would want to stay hyd roller so you could save on the $$ cost of new solid roller lifters. If Solid rollers are what you want, Each brand's offers are basically the same. I'm just not sure, " How big is Too big for what you want and what your setup needs. I don't know how new the engine is and how much stuff are you willing to change. Here's some of my lists.
@ 0.050. Lift w/ 1.5. w /1.6 LSA
Lunati 237/243 .566 /.578 .6037 /.616 110
243/249 .578 /.585 .616 /.624. 110
Comp. 236/242 .564 /.570 .6016 /.608 110
242 / 248 .570 /.576 .608 /.6144 110
248 / 254 .576 /.582 .6144/.6208 110
Howard 245 / 245 .585 / .585 .624/.624 108
245 / 249 .585 / .585 .624/.624 106
245 / 253 .600 / .600 .640/.640 108
Bullet/ UltraDyne list lobe profiles for you to pick.
I personally am just going to pick the lobes and get 2 or 3 cams made up and test. Either Comp QXI Lobes, Bullet or Howard’s. Lobes with .380<.410 lift.