440 source engine packages
Is 500ci, cnc'd Stealth heads, HFT 251*/257* @ 0.050" & 0.564" lift, Performer RPM intake, and 950 4150 carb really good for 650 hp??
Apparently the ported heads are good for 100hp? I doubt that 650hp number. The 550hp package sounds more realistic. Ported heads might make 600hp with that cam? Probably more like 580ish in my experience.
The 680hp package uses a hydraulic roller and ported stealth heads so 625ish?
A Performer RPM seems kind of small over the 550hp range does it not?
My skepticism is growing with respect to the hp numbers above the 550hp kit. Keeping the same cam, intake and carb from 550 to 680hp seems like a stretch. Just one guy's opinion..
Fwiw my (unported) stealth head equipped 11:1 cr 511" low deck made 625hp and 620tq with a QF 1050 (4150), Holley SD and 1-7/8 -> 2" step headers. Custom bullet solid roller ground for n20 and crane steel rockers.
In the car it will run 2->2-1/8" step headers and a Mopar M1 and I expect chassis dyno numbers to correlate to 650 flywheel hp n/a.
On the economic end of things you won't find too many short cuts to make in these packages. A used 66-69 hemi oil pan is not a common part for instance and that is what fits in a BBD. Used valve covers and intake might save a few bucks however shipping prices are obscene making new stuff from summit much more attractive.
Take the 680hp package and go solid roller - that would be my choice for a stock ish ( thank you George Santos) appearing stroker. The following parts woulb be required:
-Custom custom solid roller $500
-Comp Steel Rockers $850
-BAM/Isky/Comp roller tappets $650-1100
I don't know what you would subtract for the substituted parts to the dollar but it is about 60% more expensive to upgrade to a solid roller.
You can spend 15k on parts for a stroker without ever turning a wrench. 20k for a dyno fresh 511" with a solid roller isn't out of line IMO.
The days of screwing a $10k engine together at that level are over.
