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| Pontiac - Boost Turbo, supercharged, Nitrous, EFI & other Power Adders discussed here. |
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#1
01-08-2013, 02:32 PM
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Cam Help.... Crane XR276HR OK for a turbo 469ci
Hey guys my friend is selling his new roller cam combo for a good price, I was wondering what your thoughts were for this Crane XR276HR cam in a turbocharged 469ci. I have yet to purchase a cam for this combo , but any money saved is more parts later. I dont only want to buy because of a good deal , only if this cam would be ok for me. Lookin to make 700HP
3725# Race Weight 72 Firebird 455 + .060 Stock Crank ??? Rods Ross pistons - will need to be dished 10-15c.c. ?? 7k3's flowing IN: 205cfm@.300 & 235cfm@.500-.600 , EX: 160cfm@.300 & 188cfm@.500 , Stainless Valves, Chromoly retainers, hardend locks, Filled crossover Ram Air rest. factory headers 750cfm Blow thru BorgWarner S475 turbo Turbosmart 48mm wastegate Procharger Big Red BOV Precision turbo 800hp A-A Intercooler th400 12 bolt w 3:23?? Any more info needed let me know..... THANKS GUYS PY IS THE BEST!!! Will Beebe
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Also Known As "Beebe" on other sites....... PZ , Pro-Touring , Lateral-G, TAC |
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#2
01-08-2013, 04:40 PM
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Seat duration, .050 duration, LSA, ICL, Lift?
You just dont need a bunch of duration or overlap with a turbo... Often reverse split or no split.. underlap to a very small overlap window. |
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#3
01-08-2013, 04:54 PM
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I've gotten excellent results with a MUCH bigger exhaust lobe. But, that has been on fuel-injected motors. The valve timing is really critical with the bigger exhaust lobe, totally different strategy than camming a naturally-aspirated motor.
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'73 T/A (clone). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 315rwhp/385rwtq on 87 octane. 13.12 @103.2, 1.91 60'. '67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 (108LSA/ 109 ICL)solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 w/ old UD 288/296 108 hydraulic cam] Feb '05 HPP, home-ported "16" D-ports, dished pistons (pump gas only), 3.42 gears, 275/60 DR's, 750DP, T2, full exhaust |
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#4
01-08-2013, 05:28 PM
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Im gussin my money would be better spent on a custom grind .... if is a roller or not.
here is the spec for the crane .
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Also Known As "Beebe" on other sites....... PZ , Pro-Touring , Lateral-G, TAC |
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#5
01-12-2013, 11:20 AM
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If it doesnt do what you want, just turn the boost up/down. There is no perfect cam. That grind looks good for a shelf unit. 700hp will be tough with those heads. It will make boost in the manifold but not continue to make equal gains in power.
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