Thread: Fords are expensive!!!!

Tweet

Originally Posted by josh bichard

Any input would be great.

OK, I'll add some input. I had this DynoSim on file, so will share it with you. There are plenty of BBF guys who are sharper and know more about these combinations than I do, I'm just sharing what I have.
460 +0.030", stock crank.
Edelbrock 61649 heads. 75cc chambers, 310cc intake runners, 2.19"/1.76" valves. Published flow factored by 0.90 by me because every engine builder who has done independent flow tests says the the published figures are too generous. Here are the figures I used on this DynoSim pull....
0.100" 68 60
0.200" 126 106
0.300" 186 138
0.400" 234 162
0.500" 270 180
0.600" 287 186
0.700" 293 186
22cc D-cup hypereutectic pistons such as these, 9.93:1 static compression ratio with 75cc heads...
http://kb-silvolite.com/performance....tails&P_id=188
Tailor block deck height and gasket thickness to achieve a 0.045" to 0.055" squish.
Large tube, equal-length, long-tube headers with an "X" pipe between the collectors and the mufflers.
Edelbrock RPM or Weiand Stealth mounting an 850 CFM carb.
I used a mechanical roller cam in this pull. Rumor has it that the hydraulic roller tappets are too tall for use in this motor and contribute to excessive pushrod angle which pushes the rocker off the valve, or tries to. At best with guide plates, there would be excessive force against the side of the pushrod. The solid roller tappets are shorter and work better apparently. Comp doesn't even list hydraulic rollers for this motor, so there must be some validity to the rumor. Use stock ratio 1.73:1 rockers and the #954 valve springs recommended by the cam manufacturer. Counsel with Edelbrock about this.
http://www.compcams.com/Cam_Specs/Ca...csid=1027&sb=0
Installed advanced 2 degrees.

I don't know the usage of your vehicle, but this combination would make a limited daily driver, weekend warrior type motor using a 3000 stall converter with an automatic or use a manual transmission. Needs gears....

RPM HP TQ
2000 187 492
2500 237 498
3000 300 526
3500 375 562
4000 443 581
4500 496 579
5000 538 565
5500 545 520
6000 511 448
Peak volumetric efficiency 98.9% @5000
Peak BMEP 187.9 @4000

Bottom line on the solid roller cam: I know it's easy for me to spend your money long distance, but in my opinion, the higher initial cost and lashing the valves once a year is a small price to pay for the peace of mind that a flat tappet cam lifter won't go south and take the cam out with it.