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I've been toying with the idea of throwing a bigger cam in my forged 5.7 and moving the powerband up a bit. I need to know what I can get away with (how much RPM I can get away with).

currently:
218/224 on 113.5 + 3*
lobes are both XFI exhaust lobes - 3034 intake, 3035 exhaust
PAC 1518 springs, titanium retainers, 6.1 pushrods, heads are milled .020 or .030

On the dyno I pulled it to 7,000 rpm. That's about all she had. I'd love to find an option that let me shift at 8,000+ rpm (with just a spring and cam swap)

With a moderate cam lobe, what rpm could be possible with factory rockers, a single beehive (PAC 1518 or similar), and custom length or 6.1 pushrods?

*I understand a number of drag pak guys are shifting at 8,400/8,500 rpm. Any info on what they're doing to get the RPM would be appreciated.

**This car will be used for non-competitive road racing. This cam is probably about right for now, but I'd like to put something bigger in the future. I'll need to keep the lobe profile fairly mild to survive what I'm doing, which should also help keep the valvetrain under control for higher RPM, yes?

Also- what else should I be worried about at 8,000+ rpm on the 3G hemi's?


Motor:
5.7 block, Wiseco +23cc dome pistons, K1 rods, 6.1 crank. Ring gaps .020 & .024
FRI 'extreme' 5.7 heads. flow upwards of 350 cfm intake. Ferrea 2.02/1.60 valves. Titanium retainers.
Hilborn intake
unequal length mid length headers welded by me - around PS box - not the best flow no doubt. 3" x pipe, mufflers, dumped at axle.
tko600 5 speed manual
ford 9" floater
Megasquirt 3x engine management





I say yes on the 8K......I have not been to 8K myself usually around 7500. My cam is a .400 lobe wit 266 and 270 at .050 duration. I have only added the Sharadon shaft hold downs with ARP bolts pac springs and manton 3/8 pushrods. I have few street miles and some 1/4 mile passes on iit took apart top end for inspection shows no signs of wear anywhere in valvetrain.