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4Likes
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1
Post By 55312
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Post By FUNFER2
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Post By patrickt
07-08-2017, 06:10 AM
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Senior Club Cobra Member
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Join Date: Jun 2004
Location: Huntington,
VT
Cobra Make, Engine: E-M 427 Top Oiler stroked to 482 by KC, Stage 2 heads, a Quikfuel and Voila, 640 hp
Posts: 502
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Not Ranked
427 Stroker - what cam maker to replace Comp
Had a Comp roller lifter disintegrate on #4 exhaust and most certainly trashed the cam. A gentleman in KY is helping me put a list of parts together to calm this engine down and make it more streetable. It's a 1963 Center Oiler so it's a solid lifter motor. My question is: What cam maker have you had good luck with? Lunati? Crower? Crane? Iskey? I'm open to all suggestions except Comp!
Thanks
Tim
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07-08-2017, 06:25 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,415
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Not Ranked
Tim, all of my camshafts are from Comp. I don't have any issues with them. I hand pick the lobes per engine, they grind them, and we're on our way. With maybe Bullet as being an exception, Comp has the most lobes to choose from, which makes it much easier to nail down an exact camshaft profile.
Your issue was with running a solid roller lifter on a block that's not drilled for lifter oil galleys. It wasn't Comp Cams' fault.
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07-08-2017, 07:59 AM
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CC Member
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Join Date: Oct 2016
Location: Pleasanton,
CA
Cobra Make, Engine: ERA 824 with 470 FE BBM street 427
Posts: 550
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Not Ranked
Our local club builder's experience is similar to Brent's. He custom specs his cams from Comp, as he's gotten lots of out-of-spec part-numbered cams from many manufacturers. He claims when he special orders they grind on a CNC rather than using old, worn-out cam grinding machines. He's see stock cams be out by 20%. Even spec'ing custom grinds he checks all cams as-received to make sure the profile meets his spec (he still has had a few out of spec).
He uses something like this:
https://www.google.com/url?sa=i&rct=...99608637978506
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07-08-2017, 08:31 AM
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CC Member
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Join Date: May 2006
Location: St. Louisville,
Oh
Cobra Make, Engine: A&C 67 427 cobra SB
Posts: 2,445
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Not Ranked
It is my understanding that solid roller lifters need a lot of oil, and even blocks drilled for hydraulics cannot take long idle times. Solid lifter FE engines rely on oil slinging off of the crank. I agree your problem was not the manufacturer's product quality, therefore you're not going to find another brand that is going to solve the problem.
If you are going to run solid rollers in that block, you have to be prepared to replace them frequently.
Where is Patrick? Now is the time to talk about the virtues of a solid flat tappet cam. You will give up some power, but gain longevity if you use the right oil additives.
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07-08-2017, 09:37 AM
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CC Member
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Join Date: Jan 2008
Location: Williamsport,
PA
Cobra Make, Engine: Kellison Stallion 468 FE
Posts: 2,703
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Not Ranked
when i lost a roller in my 468 FE and was forced to disassemble totally, i
went with a crower solid flat tappet, #16332, grind 300FDP, and used their lifters with the oiling hole on the face for some extra peace of mind. all builders will have their preference though, its just what i chose to use.
__________________
Fred B
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07-08-2017, 10:02 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,415
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Not Ranked
When I do a solid flat tappet FE build, I will use the Crower SBF EDM lifters. In the OP's case though, his block is not drilled for lifter passages, so it wouldn't do him any good.
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07-08-2017, 04:15 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,000
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Not Ranked
Quote:
Originally Posted by olddog
Where is Patrick? Now is the time to talk about the virtues of a solid flat tappet cam. You will give up some power, but gain longevity if you use the right oil additives.
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Patrick is right here. If he went with my 1963 solid flat tappet grind, he would be happy with the performance, the sound would blow him away, and it wouldn't tear itself apart in three years either. But, it wouldn't hurt to ask Brent what he would choose as specs for a solid flat tappet cam, high performance but predominantly street driven, and that would last, say, a good 50K miles. That way the OP's heirs can do the rebuild. As a comparison, my 1963 grind is 245/245/.525 lift at .050 and a LSA of 114 -- with Erson roller rockers. And I have it installed five degrees advanced. Now, 54 years ago, it was the cat's meow.... Brent might say "I can live with that... but let's tighten up the LSA and give it a hair more lift."
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07-08-2017, 04:29 PM
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CC Member
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Join Date: Oct 2002
Location: Eagle,
Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,307
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Not Ranked
Lol,...that's funny bud.
Jut a little more Patrick, a little more.
__________________
Regards,
Kevin
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07-08-2017, 04:33 PM
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CC Member
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Join Date: Oct 2002
Location: Eagle,
Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,307
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Not Ranked
Quote:
Originally Posted by ACHiPo
Our local club builder's experience is similar to Brent's. He custom specs his cams from Comp, as he's gotten lots of out-of-spec part-numbered cams from many manufacturers. He claims when he special orders they grind on a CNC rather than using old, worn-out cam grinding machines. He's see stock cams be out by 20%. Even spec'ing custom grinds he checks all cams as-received to make sure the profile meets his spec (he still has had a few out of spec).
He uses something like this:
https://www.google.com/url?sa=i&rct=...99608637978506
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Eye candy for sure. Love the 5 axes.
Who's shop is that ?
__________________
Regards,
Kevin
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07-09-2017, 06:43 PM
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CC Member
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Join Date: Oct 2002
Location: Eagle,
Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,307
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Not Ranked
Brent, is a bullet cam worth the cost ?
Pro's, Con's ?
__________________
Regards,
Kevin
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07-09-2017, 06:51 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,000
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Not Ranked
Quote:
Originally Posted by FUNFER2
Brent, is a bullet cam worth the cost ?
Pro's, Con's ?
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Brent has probably blocked you because you nag him like a fishwife. Here, I'll pretend I'm Brent and answer the question for him:
"Bullet makes a great cam, but the key is the customization. All my cams are ground to my exact specs and I take great care in choosing my lobe profiles, ramp rates, and separation angles based on the individual customer's build. That is what you are paying for, and it is well worth it."
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07-10-2017, 04:31 PM
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CC Member
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Join Date: Jan 2008
Location: Williamsport,
PA
Cobra Make, Engine: Kellison Stallion 468 FE
Posts: 2,703
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Not Ranked
i knew it......Patrick is schizophrenic
__________________
Fred B
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