I was just wondering what makes a good na cam vs a good Fi cam. becuase i see guys runing 112 lsa lots of duration and high lift with turbos, my thought that was a good na cam. So FI i thought you want a loose lsa and high lift. Someone clarify for me.
Last edited by 6.0vortecchevy; 10-26-2011 at 07:39 PM.
The overlap + LSA is what is important.
1969 Chevy RCLB C10 350/TH400 SOLD
2007 Chevy RCSB 4.8 4x4 LS SOLD
2008 Chevy RCSB 5.3 4x4 LT SOLD
2010 Chevy CCSB 6.2 4x4 LT SOLD
2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
2013 FORD CCSB F350 6.7 Powerstroke 4x4
untill you start seeing over 1k hp then the cam isnt as important as some may think. Hell i used a trex and had no issues with spool or boost....theres alot of myths out there that get passed on from ppl to ppl, then ppl live by those. its actually the ppl who think outside the norm are the ones usually with great success...it just took a few trys to get it right were as others just follow
2002 Lightning - GT headed 5.5Litre w/ Twin 7665s
2002 Silverado - 427Lsx w/ Twin gt4202s
2010 Silverado crewcab Z71 - 5.3litre w/ procharger
2000 Wrangler - 5.3litre with some stance
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it ain't that I'm too big to listen to the rumors, It's just that I'm too damn big to pay attention to 'em..That's the difference
I did the cam calculator and i if i remember right it said my cam had negative over lap. specs are 112 218/227 in/ex 525
so what your saying there really is no FI or NA cam. Ino some could work better then others but wouldnt a cam with alot of over lap bleed boost?Originally Posted by Quik
BTW it said my cam has -1.50 overlap, ino what overlap is but what exactly is the 1.50 degrees?
Last edited by 6.0vortecchevy; 10-26-2011 at 07:54 PM.
it all depends on what your shooting for. Id rather have some overlap then neg for something that is going to make big power. If i was going to boost something heavy i would defferently spec a cam differently then a RCSB or even a fbody. Spend some time on sites like theturboforums, yellowbullet and the FI on tech. youll see certain ppl replying about using cams with overlap and there success. in a blower situation youll bleed boost but a turbo setup will still make boost as its regulated by the wastegate. if you dump the boost into the exhaust youll spool faster. bleeding boost also helps reduce back pressure allowing more rpm and resulting in more power.
2002 Lightning - GT headed 5.5Litre w/ Twin 7665s
2002 Silverado - 427Lsx w/ Twin gt4202s
2010 Silverado crewcab Z71 - 5.3litre w/ procharger
2000 Wrangler - 5.3litre with some stance
2014 Xsport- 3.5 Eco boost
412 Motorsports
it ain't that I'm too big to listen to the rumors, It's just that I'm too damn big to pay attention to 'em..That's the difference
so would you say my cam is a better blower cam then turbo?
for a heavy truck that cam should lite the turbo pretty well and have a tight power band...least how i see it. not something i would use for my RCSB but something like my crew id use it
2002 Lightning - GT headed 5.5Litre w/ Twin 7665s
2002 Silverado - 427Lsx w/ Twin gt4202s
2010 Silverado crewcab Z71 - 5.3litre w/ procharger
2000 Wrangler - 5.3litre with some stance
2014 Xsport- 3.5 Eco boost
412 Motorsports
it ain't that I'm too big to listen to the rumors, It's just that I'm too damn big to pay attention to 'em..That's the difference
And what do the degrees in over lap mean. Mine being -1.50 does that mean i have no overlap at all or just less of it. I put in diff cam specs and got one for -13.1 over lap. Then i tried another and got positive overlap.
Last edited by 6.0vortecchevy; 10-26-2011 at 08:38 PM.
my previous cam was a 231/235 .617.620 113+2lsa ...new F.I cam is a 222/222 .601.601 115 LXL lobes
Pat G said my previous cam had too much overlap and dynamic compression.... now its so quiet at idle but its still untuned...
Last edited by CHEVROLADE; 10-26-2011 at 08:37 PM.
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