small block cam suggestions

[270 laser]

ANYONE HAVE GOOD CAM SUGGESTIONS FOR THIS COMBO? 350 SMALL BLOCK, VORTEC HEADS, 9.8 TO 1 COMPRESSION, PERFORMER RPM INTAKE,WEBER 4 BARREL,STOCK EXHAUSTS WITH 4" THRU HULL. THIS IS A ROLLER CAM MOTOR WITH 1.6 ROCKERS. NOT LOOKING FOR ANYTHING TOO CRAZY. JUST WANT ABOUT 380-400 HP RELIABLY WITHOUT REVERSION AND WITH A DECENT IDLE. THINKING ABOUT GM HOT CAM 218 INTAKE 228 EXHAUST, .492LIFT 112LSA THANKS

[Hotcrusader76]

270 laser:
ANYONE HAVE GOOD CAM SUGGESTIONS FOR THIS COMBO? 350 SMALL BLOCK, VORTEC HEADS, 9.8 TO 1 COMPRESSION, PERFORMER RPM INTAKE,WEBER 4 BARREL,STOCK EXHAUSTS WITH 4" THRU HULL. THIS IS A ROLLER CAM MOTOR WITH 1.6 ROCKERS. NOT LOOKING FOR ANYTHING TOO CRAZY. JUST WANT ABOUT 380-400 HP RELIABLY WITHOUT REVERSION AND WITH A DECENT IDLE. THINKING ABOUT GM HOT CAM 218 INTAKE 228 EXHAUST, .492LIFT 112LSA THANKSIf you want the best advice for your cam selection, click on to this link: http://www.compcams.com/information/CamSelection/default.asp and FAX it to them or just call in.
Otherwise the best recommendation would be the 280R or 288R Roller camshafts by www.compcams.com (http://www.compcams.com)
Good luck bro... :D

[ctchndltgo]

Look into an Isky Cam Kit #200520
485/495,Adv dur.278/284, .050 dur 234deg/242deg,lobe center 108deg
Should do what you want
Brian

[270 laser]

Have you tried this cam with stock thru hull exhausts?

[Dennis Moore]

Good choice but a little too much exhaust duration for me. Comp Cams with around 218 degrees intake duration and 224 degrees exhaust duration (I like 110 degress LSA but Comp likes 112 on marine cams). Should work fine too 5,500 rpm. Set the timing at no more than 32 degrees total advance.
Dennis Moore
Family and Performance Boating Magazine

[396_Z]

From experience I've learned not to question anything from the compcams XE series. Pick the one that fits your set up best and stuff it in, you won't be dissapointed.

[kevnmcd]

Dennis Moore:
Good choice but a little too much exhaust duration for me. Comp Cams with around 218 degrees intake duration and 224 degrees exhaust duration (I like 110 degress LSA but Comp likes 112 on marine cams). Should work fine too 5,500 rpm. Set the timing at no more than 32 degrees total advance.
Dennis Moore
Family and Performance Boating MagazineDennis, Can you explain why not to use more than 32 degrees total advance? I have almost the same setup as 270 Laser and am running about 35 degrees total.

[Dennis Moore]

Over the last twenty years Chevrolet has moved the spark plug closer to the center of the combustion chamber with each redesign of the head. By moving the spark plug tip the timing total advance is increased (it has less distance to travel across the combustion chamber). In other words with a spark plug at the edge of the combustion chamber 36 degrees would be required (old style cylinder heads) but only 32 degrees is required when the plug is at the center of the chamber (Vortech heads).
Dennis Moore

[kevnmcd]

So there is no performance gain to an engine with vortec heads running more than 32 degrees?

[MikeF]

K, On pump gas, probably not. Mike

[Dennis Moore]

32 degrees total advance for a Vortech is equal to 34 - 36 degrees advance on the older heads. Always remember to run as little advance as possible. Back off the timing until you start loosing power and then bump it up again to the point where you are at max performance. In other words, if it runs the same at 30 degrees as it does at 36 degrees why would you want to run 36 degrees?
You would be much closer to detonating the engine for no good reason! Hope this makes sense to you!
Sincerely
Dennis Moore