TECH Addict
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I'm quoting this from another site, again, not my wordsOriginally Posted by ap2002
nice grinds, but looks like most grinds are meant to be used with aftermarket/worked heads to take advantage of it...
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ppl look at the 330 and think they are great heads, fact is the air is actually moving slowly and dont have the velocity as you would with a smaller cc runner and smaller intake valve. so some say they need huge spilts to make the lack of velocity work for them.
designers have gotten it to work best this way where as the catheral port heads flow closer in intake/exhaust and can use a much closer split or even single pattern cam.
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I wonder why rectangular ports like big duration splits and equal in and ex lifts??
easy answerd. those heads have a flow number ppl think is well but are actually inefficent. they use stock 2.18 valves with a 245cc runner and flow 330 stock on intake. use 1.6 exhaust with a smaller exhaust runner and poor exhaust flow.I wonder why rectangular ports like big duration splits and equal in and ex lifts??
ppl look at the 330 and think they are great heads, fact is the air is actually moving slowly and dont have the velocity as you would with a smaller cc runner and smaller intake valve. so some say they need huge spilts to make the lack of velocity work for them.
designers have gotten it to work best this way where as the catheral port heads flow closer in intake/exhaust and can use a much closer split or even single pattern cam.
I wonder what the life time of the springs, valve train is going to be with a even more aggres lobe then a XFI lobe..
Resident Retard
I have about 10k on my cam, and i shift pretty high, and i don't have any problems... But i have dual springs rated to .650...
Resident Retard
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Mine is a special FTI Lobes.... which is similar to XFI or LSR lobes... They are asymmetrical lobes if i recall correctly... It is a comp cam, but the lobes are only available to FTI, i believe, i may be wrong....Originally Posted by Mangled03gmc
Corey are you running a XFI lobe??
Launching!
im curious any one install this 210/224 .556/.568 114LSA cam?? cuz i order it already any dyno numbers or reviews?
TECH Addict
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read my previous postOriginally Posted by terravast4
That is a lot of lift on those 4.8-5.3 cams
Launching!
Well I think I going to try one either the centri blower cam or the rectangle port 400+ci cam. I have 72cc PRC L92/LS3 heads with stainless valves on my 408 9.25:1 with 15psi procharger. I dont see why my PRC Dual Springs would not work there good to .660 lift and are 390lb open otherwise let me know. I currently have a Texas Speed & Performance 233/239 .595/.603, 112 LSA. It just seems like these cams are monsters my cam/vic JR intake/low CR and 3600rpm stall already make my truck a slug under 3000 Im sure it cant get much worse.
243/259 .624/.624 116LSA
Best cam for high rpm power in race application when using a centrifugal blower.
3000-7200 RPM
247/263 .624/.624 114LSA
2400-7000rpm
400+ci high rpm applications with major modifications and rectangular port cylinder heads
243/259 .624/.624 116LSA
Best cam for high rpm power in race application when using a centrifugal blower.
3000-7200 RPM
247/263 .624/.624 114LSA
2400-7000rpm
400+ci high rpm applications with major modifications and rectangular port cylinder heads
TECH Fanatic
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Holy Crap Originally Posted by hirdlej
LoL Damn, you got it figured out!
Wheres the power band start in that truck, around 7K?