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Discussion Starter · #1 ·
Recently built a 406 with a custom solid roller camshaft. Afterwards I put the combo in Dyno2000. I thought it was interesting how the numbers came out against the comp cam XR288HR 236/242 520/540 LSA 110 IC 106. My camshaft is 235/246 612/596 LSA 108 IC 107. The remaining parts to my combo are as follows:

10.5:1 compression
Sportsman II heads
Comp Gold 1.6 rockers
Rpm Air Gap
1 5/8 Headers
770 Holley
6-speed
4.10 gears

Comp 288HR / Custom Solid Roller
HP/TQ
2500 197 413 2500 187 393
3000 249 436 3000 240 420
3500 310 465 3500 302 452
4000 370 486 4000 364 478
4500 423 493 4500 418 487
5000 459 482 5000 456 479
5500 478 456 5500 479 457
6000 468 410 6000 478 419

I thought I would see more of a difference than indicated between the two but I'm no GURU just wondering. The Custom will out perform the Comp in the car right? Any thoughts?
 

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The tighter lobe seperation will work good with those heads, i would shoot for the bigger cam but have it ground on the tighter lobe seperation

Our 406 has been 10.436 @127.4mph with the following {2,780 race weight}:
- KB hyper flat tops 11.5:1 with our chamber, deck and gasket
- 283 heads, bowl ported, larger valves, no runner work and cut for 1.46" springs and studs
- 256/264 @.050 .545/.563 105° lobe seperation installed @ 102°
- Victor Jr. with a 850 currently BG modified by us, The 750 has always ran quicker on the 406 but its on the chevelle, The 750 BG was also modified by us

Those heads you have will like the tighter lobe seperation just like ours. The dyno programs almost always show a loss of power with tight lobe centers but the track they ET quicker so the proof is in the ET
 
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