Bad @ss 351w combo. need help

macx · 03-02-2001, 09:47 PM

Crane has a good selection of retrofit roller cams (if you don't have a 94 or newer roller block) check www.cranecams.com & can use w/steel distrib gear. They're good with Ford cams, too. Look at their descriptions - that will tell you operating characteristics. I'm sure you can also contact them & ask, specially about the pistons. You might have a problem with the pistons. At the VERY least, ALWAYS mock it up and check w/clay. I would suspect you're not going to do much for cam w/o doing something w/pistons. If you want a "ba" engine, definitely go the R heads. 20 more hp & torque than street heads even w/relatively mild cam. Also, they match the port flow of the intake better - the intake flows 310, the street heads something like 260 or so and the R's somewhere at or close to 300. AFter all this - I've got an article that tested both street & R heads on a street 351 w/Crane retro roller 220 @ 050 & only 498. Used modified 400 rods for better rod/stroke ratio, & Yates style JE pistons that had valve reliefs that matched the comb chamber shape for good quench & efficient combustion. Ran Performer efi w/custom WOT chip - trifk flow intake not yet available. All parts listed in article. Said could have used bigger cam w/R heads to do best output. Ran 11-1cr, ran best at only 32 advance (efficient combustion) on 87 octane (no misprint) and with the R's put out 450 torque at 4000 & 400 hp at 5000. That could probably go up 15 or more w/bigger cam. I've got article scanned if you'd like. I'm going to build one. macx@clas.net if you want, mention what you're after. 2 transmissions so I don't overload your mailbox.

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03-02-2001, 09:47 PM	#5
macx Registered Member Join Date: Oct 1999 Location: Gordonville MO USA Posts: 448	Crane has a good selection of retrofit roller cams (if you don't have a 94 or newer roller block) check www.cranecams.com & can use w/steel distrib gear. They're good with Ford cams, too. Look at their descriptions - that will tell you operating characteristics. I'm sure you can also contact them & ask, specially about the pistons. You might have a problem with the pistons. At the VERY least, ALWAYS mock it up and check w/clay. I would suspect you're not going to do much for cam w/o doing something w/pistons. If you want a "ba" engine, definitely go the R heads. 20 more hp & torque than street heads even w/relatively mild cam. Also, they match the port flow of the intake better - the intake flows 310, the street heads something like 260 or so and the R's somewhere at or close to 300. AFter all this - I've got an article that tested both street & R heads on a street 351 w/Crane retro roller 220 @ 050 & only 498. Used modified 400 rods for better rod/stroke ratio, & Yates style JE pistons that had valve reliefs that matched the comb chamber shape for good quench & efficient combustion. Ran Performer efi w/custom WOT chip - trifk flow intake not yet available. All parts listed in article. Said could have used bigger cam w/R heads to do best output. Ran 11-1cr, ran best at only 32 advance (efficient combustion) on 87 octane (no misprint) and with the R's put out 450 torque at 4000 & 400 hp at 5000. That could probably go up 15 or more w/bigger cam. I've got article scanned if you'd like. I'm going to build one. macx@clas.net if you want, mention what you're after. 2 transmissions so I don't overload your mailbox.