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oldman · 03-30-2020, 08:05 PM

The stock head flows less at lifts above .550. So what is the point of a rapid profile cam and .640 up lift? The cam is large probably work better with 12.25 cr and E50 or 93. A smaller cam with less lift will produce the same hp from 6000 up, but WAY more torque midrange.

Also, there is NOTHiNG in the valve train that can take the cam IMO. So welcome to pushrods, trunion, c5r chain,jhoneson lifter, pushrod length checker, springs shims, spring height checker, springs (change every 20k miles), valve guide wear, valve / seat refacing, have the studs crack into the intake ports on ported heads, hope you don’t have valve bounce or the stock hollow intake head will fall into the chamber, better lock the cam gear. But what do I know?

03-30-2020, 08:05 PM	#8
oldman Drives: SS 6 speed of course Join Date: Jan 2016 Location: Hilo, HI Posts: 4,324	The stock head flows less at lifts above .550. So what is the point of a rapid profile cam and .640 up lift? The cam is large probably work better with 12.25 cr and E50 or 93. A smaller cam with less lift will produce the same hp from 6000 up, but WAY more torque midrange. Also, there is NOTHiNG in the valve train that can take the cam IMO. So welcome to pushrods, trunion, c5r chain,jhoneson lifter, pushrod length checker, springs shims, spring height checker, springs (change every 20k miles), valve guide wear, valve / seat refacing, have the studs crack into the intake ports on ported heads, hope you don’t have valve bounce or the stock hollow intake head will fall into the chamber, better lock the cam gear. But what do I know? __________________ Forged short block, large duration sub .600 lift Cam Motion cam, 7200 RPM fuel cut, Pray Ported Heads, 3.85 pulley D1X, stage II intercooler, DSX secondary low side, DSX E85 sensor, Lingenfelter big bore 2.0 pump, ported front cats, 60608 Borla, LT4 injectors, ZL1 1LE driveshaft and Katech ported TB, ported MSD intake, BTR valvetrain, ARP studs, ProFlow valves, PS4 tires.