Serious Cams

[DiDueColpi]

Yep the Ford body is 0.875" but the upper portion necks down to what appears to be an industry standard size. The only difference looks to be in the lifter bore spacing. I ordered up a full complement of bones from comp. and they all fit the lifters, they just don't all fit the block.
By the way, how tight do you intend to spin your engine? A hydraulic lifter should be able to out rev your crank and head with ease. Any weight advantage would be lost with the addition of an adjuster on the rocker.
However if we made them out of plaidmium like Mikes door panels............
Cheers
Fred

[mgb260]

Paul, 4.9 Caddy spider dimensions: 14 1/4" length longest point to opposite longest point, 5 1/4" wide finger end to finger end, lengthwise spacing between finger centers 4 1/2". 11" bolt hole center to bolt hole center. Look at picture in message above. How does that compare to the 5.0 Ford?

[roverman]

Fred and clan,how did this thread get so twisted ? FYI, hyd. lifters tend to "bleed-off" hp. above 5k rpm.The "converted" lifter is 11 grams lighter. Reference, Engine Masters Mag., bbm lost 30hp. by 6,200 rpm.? My 4.0L , with skinny cast crank would road race, up to 8k and LIVE.To build a Rover that only runs to 5k, is under-mining the purpose of a small light weight V8 ? roverman.

[pcmenten]

Jim, thanks for the specs. I'll dig into that this weekend.

Art, in re: engine tuning, my 86 Mustang with roller cam has massive low-end torque, probably much more than a flat-tappet cam. Flat tappet cams can be designed to spin 8k and make power like a roller, but the flat tappet cams just don't make the low-end torque.

The other problem with tuning for 8k is the exponential increase in cost as engine speed goes up; titanium retainers, lightweight rockers, titanium pushrods, beefy con rods, etc.

I'm thinking a roller 4.0 will have low end torque like a 4.6, and a roller 4.6 would pull like a locomotive.

Paul

[roverman]

More than 5, less than 8k ? Non of this matters with-out a bump-stick. Anyone find a grinder with matching masters ? roverman.

[roverman]

Clan, anybody got one to spec-out like Fred did , on the Ford roller ? It's time to knock their cam, off the perch !  I'll check for a suitable cam "master", with Contreras Cams. "Rollin on a Rover"....roverman.