Roller Cam Retro-fit
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Joined: Aug 2001
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From: Delaware
Roller Cam Retro-fit
My roller cam came today, as did my lifters and conversion kit. The conversion kit has dog bones and a spider. I see how the dog bones fit, but I am confused about the location and function of the spider.
Also I am ready to remove the old cam and install the new one. I bought a cam install handle from PAW to do this, but it is for a chebby. Does anyone have a good method for doing this without nicking up the cam bearings? The bottom end of the motor is still intact and I don't want to drop the pan, because I will have to disconnect the mounts and jack it up.
Also I am ready to remove the old cam and install the new one. I bought a cam install handle from PAW to do this, but it is for a chebby. Does anyone have a good method for doing this without nicking up the cam bearings? The bottom end of the motor is still intact and I don't want to drop the pan, because I will have to disconnect the mounts and jack it up.
Posting Legend
Joined: Sep 2001
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The spider holds all of the dog bones down against the lifter bores. It is usually retained by some bolts that are tapped into the center of the lifter gallery. You have to drill and tap the holes yourself. Use grease to keep the chips from migrating thru your engine. Put a magnetic drain plug in also.
Who did you get the conversion kit from?
Who did you get the conversion kit from?
Posting Guru
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Posting Guru
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Crane conversion lifters cost more than double
$419 vs $169 for the stock type
http://store.summitracing.com/defaul...32-16&x=20&y=6
http://store.summitracing.com/defaul...32-16&x=20&y=6
Lead Driver
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From: Albuquerque
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Posting Legend
Joined: Sep 2001
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Are the Comp Cams stock-type lifters actually stock or are they a special height?
I have a set of stock Ford rollers ($50 cost) and was wondering whether I was going to have to do some machining around the lifter bores. There are specs on how those dog bones have to ride on the lifters.
I have a set of stock Ford rollers ($50 cost) and was wondering whether I was going to have to do some machining around the lifter bores. There are specs on how those dog bones have to ride on the lifters.
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Joined: Aug 2001
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From: Delaware
PAW sells the Comp Cams 31-1000 conversion kit for $43.95.
Comp Cams Roller Lifter sells for $197.95. They say that they are a direct factory replacement for 302s with factory hydraulic roller cams or 351W, 351C, 400M, 289-302 and 351M with Comp Cams retro-fit kit.
I am using stock Ford (302) replacement roller lifters.
Comp Cams Roller Lifter sells for $197.95. They say that they are a direct factory replacement for 302s with factory hydraulic roller cams or 351W, 351C, 400M, 289-302 and 351M with Comp Cams retro-fit kit.
I am using stock Ford (302) replacement roller lifters.
Elder User
Joined: Apr 2003
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From: Normal, IL
The reason for the higher cost of the crane lifters is the fact that they are of an anti pump-up design, and the fact that they use tie bars similar to those on mechanical roller lifters, instead of the factory-style dog bones. IMO, this is a much stronger setup.
Just my $.02
Just my $.02
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Comp kits & Crane retrofit lifters
Based on the $43 price, I'm sure the parts are the same as the #M-6253-A50 kit ($60) from Ford.
I was aware of the tie bars on the Crane lifters but hadn't heard about the anti-pump up or the strength issue. If I had to pay that much for lifters I'd go with a solid roller. The Crane lifters also require custom length Crane pushrods.
I was aware of the tie bars on the Crane lifters but hadn't heard about the anti-pump up or the strength issue. If I had to pay that much for lifters I'd go with a solid roller. The Crane lifters also require custom length Crane pushrods.
Elder User
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From: Normal, IL
Re: Comp kits & Crane retrofit lifters
Originally posted by Brian S
The Crane lifters also require custom length Crane pushrods.
The Crane lifters also require custom length Crane pushrods.
As does any roller cam of any kind. I like the anti pump-up feature because it lets you have the performance and rpm potential of a solid, with the cushion of the hydraulic.
Posting Legend
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Most modern lifters work real well and are pump up resistant. I wouldn't worry about the stock lifters thru 6000 rpm or so.
Ford wants $435 for their retro HR lifter with tie bar # M-6500-S58
According to Ford, in order to use an anti-pumpup lifter you need an adjustable valve train, no pedestal mount rockers. I am not sure what all of the ramifications here are. Of course the explanatory literature I was looking at was fairly old.
Ford wants $435 for their retro HR lifter with tie bar # M-6500-S58
According to Ford, in order to use an anti-pumpup lifter you need an adjustable valve train, no pedestal mount rockers. I am not sure what all of the ramifications here are. Of course the explanatory literature I was looking at was fairly old.