Would you use this cam, look at the Lobe(pic)
If you have to come on here and ask... if there's ANY doubts about the integrity of a lobe, do not run it !!!
Why do you say $250 ? That look like a flat tappet cam. Those cant go much over $100.
Why do you say $250 ? That look like a flat tappet cam. Those cant go much over $100.
Supreme Member
Joined: Jul 1999
Posts: 1,386
Likes: 1
From: Tucson,AZ,USA
Car: Junk
Engine: Junk with nitrous
Transmission: Junk with gears
no kidding, 250 for a flat tappet? Dayam! GET A NEW ONE. trust me on this. I burned through THREE cams in the past because I tried to re-use old but "still good" cams with new lifters. 3 out of 5 times the cam will not wear right and some lobes will go round. I swear to *** this happened to me twice on one car (my firebird) and I just about pulled all my hair out till I realized it was because I was reusing an OLD cam with NEW lifters. Not a good idea. Trust me.
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Supreme Member
Joined: Sep 2001
Posts: 6,111
Likes: 53
From: Ontario, Canada
Car: 1988 Firebird S/E
Engine: 406Ci Vortec SBC
Transmission: TH-350/3500stall
Axle/Gears: 7.5" Auburn 4.10 Posi-Traction
That looks like a normal wear pattern for a flat tappet cam.
Get a dial caliper and measure the dia of the lobe and compare to some others on the cam. .002" wear is acceptable.
Inspect the old lifters. Put two of them end to end and see if they will still rock together. (still convex).
Is this cam going back into the same motor?
You can deglaze the lifter bores with a small brake cylinder hone.
This will ensure that the lifters can spin in their bores when the motor runs. Wash down the lifter bores with brake cleaner. Change the oil. This is a major cause if cam lobe failure.
What are the specs on your "custom grind". There is probabily
an off the shelf grind that will work the same or better for a lot less.
Get a dial caliper and measure the dia of the lobe and compare to some others on the cam. .002" wear is acceptable.
Inspect the old lifters. Put two of them end to end and see if they will still rock together. (still convex).
Is this cam going back into the same motor?
You can deglaze the lifter bores with a small brake cylinder hone.
This will ensure that the lifters can spin in their bores when the motor runs. Wash down the lifter bores with brake cleaner. Change the oil. This is a major cause if cam lobe failure.
What are the specs on your "custom grind". There is probabily
an off the shelf grind that will work the same or better for a lot less.
Supreme Member
Joined: Sep 2001
Posts: 6,111
Likes: 53
From: Ontario, Canada
Car: 1988 Firebird S/E
Engine: 406Ci Vortec SBC
Transmission: TH-350/3500stall
Axle/Gears: 7.5" Auburn 4.10 Posi-Traction
XS290S-10 12-679-5 290°/296° 252°/260° .360"/.372" .540"/.558" 110° (+4)
Comp cams Extreme Energy XS290S-10 will replace this
These are a new series and not in the catalog yet.
Crane Blue racer WG5083 is the same except ground on 106
285-2M
Mech E
250 260
285 295
.533” .555”
104/108
Elgin #E1090 is a proven performer in this application
specs are 256/264 .537/.557 285/295 106
You can buy this cam and lifters set for $99 US +shipping
from Competition Products
http://www.competitionproducts.com/page48.html
Comp cams Extreme Energy XS290S-10 will replace this
These are a new series and not in the catalog yet.
Crane Blue racer WG5083 is the same except ground on 106
285-2M
Mech E
250 260
285 295
.533” .555”
104/108
Elgin #E1090 is a proven performer in this application
specs are 256/264 .537/.557 285/295 106
You can buy this cam and lifters set for $99 US +shipping
from Competition Products
http://www.competitionproducts.com/page48.html
Supreme Member
Joined: Jun 2001
Posts: 3,238
Likes: 4
From: Calgary, Alberta, Republic of Western Canada
Car: 1986 Sport Coupé
Engine: 305-4v
Transmission: 700R4 and TransGo2
Originally posted by madmax
I had a used cam reground to custom specs (thats what happens when there is no aftermarket cam available) for $30.
I had a used cam reground to custom specs (thats what happens when there is no aftermarket cam available) for $30.
We were wondering how old you are. But good grief, before there were aftermarket cams? Was that the paleolithic age?
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Old enough. Not referring to a SBC or similar though, not all engines have cams available. When you work with the oddball application, sometimes you gotta make do. Couldnt get pistons either (well, not for less than $200 a pop) so I cut around .060 or so off the head to raise the compression. Heh. I had that cam cut in 1993.
The place that did it was a machine shop, but not your average performance/rebuilder. They did all sorts of stuff, from mass rebuilding to straightening axles, remachining spindles, etc. You'll find many people who have a real problem with 'regrinds' but I've run a few and they've held up fine for me.
The place that did it was a machine shop, but not your average performance/rebuilder. They did all sorts of stuff, from mass rebuilding to straightening axles, remachining spindles, etc. You'll find many people who have a real problem with 'regrinds' but I've run a few and they've held up fine for me.
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