roverman Art Gertz Winchester, CA. (3188 posts) Registered: 04/24/2009 11:02AM Main British Car: 74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L |
Re: Serious Cams
Fred, previous post, we covered using Buick V6,(3100 and 3800) hyd. rollers. They drop-in without bleed-off issues. Dog bones also work. Questionmark at this juncture, is best way to retain ? Some propose,overlapping spyders, bolted to block valley area. Thanks, roverman.
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mgb260 Jim Nichols Sequim,WA (2461 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: Serious Cams
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roverman Art Gertz Winchester, CA. (3188 posts) Registered: 04/24/2009 11:02AM Main British Car: 74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L |
Re: Serious Cams/Caddy with a spyder
Thanks Jim, Perhaps you could a. measure or b. loan/sell one to Paul ? I'm thinkin a "spyder" in the kitchen...not too weird? This is how we roll. roverman.
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DiDueColpi Fred Key West coast - Canada (1365 posts) Registered: 05/14/2010 03:06AM Main British Car: I really thought that I'd be an action figure by now! |
Re: Serious Cams
Hey Art, totally aware of the lifter issues. Just "threw the dog a bone" to offer some options. The Buick dog bones are hard to find up here. But the Ford ones seem to grow on trees.
Roll on Fred |
roverman Art Gertz Winchester, CA. (3188 posts) Registered: 04/24/2009 11:02AM Main British Car: 74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L |
Re: Serious Cams
Fred, Isn't the Ford about .875" dia. ? I bought "lots" of lifters/dogbones on ebay(Detroit take-outs from GM. assembly line). Never run. Chevrolet 60 deg. V6. .842" dia./good-to-go. I'm starting to convert these to mech.(internals), less weight/more zip. roverman.
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DiDueColpi Fred Key West coast - Canada (1365 posts) Registered: 05/14/2010 03:06AM Main British Car: I really thought that I'd be an action figure by now! |
Re: Serious Cams
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 Jim Nichols Sequim,WA (2461 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: Serious Cams
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?
Edited 1 time(s). Last edit at 09/04/2010 01:58AM by mgb260. |
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roverman Art Gertz Winchester, CA. (3188 posts) Registered: 04/24/2009 11:02AM Main British Car: 74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L |
Re: Serious Cams/pladmimum ?
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.
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Re: Serious Cams
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 Art Gertz Winchester, CA. (3188 posts) Registered: 04/24/2009 11:02AM Main British Car: 74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L |
Re: Serious Cams/ train of thought ?
More than 5, less than 8k ? Non of this matters with-out a bump-stick. Anyone find a grinder with matching masters ? roverman.
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roverman Art Gertz Winchester, CA. (3188 posts) Registered: 04/24/2009 11:02AM Main British Car: 74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L |
Re: Serious Cams vs, Real Steel's "Tornado"
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.
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