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#1
11-18-2018, 11:46 AM
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ID this cam?
Disassembled my 400 and got mostly bad news. Crank already .010/.020 under, bore is already .060 over.
Just curious if anyone knows what cam this is, I won't be reusing it, but I'd like to know what it is:  Lifter: 
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1964 Catalina 2+2 4sp, 421 Tri-power 1965 GTO, Roadster Shop chassis, 461, Old Faithful cam, KRE heads 305 CFM, Holley EFI, DIS ignition. 1969 GTO 467, Edelbrock 325 CFM, Terminator EFI 1969 Firebird Convertible |
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#2
11-19-2018, 04:52 PM
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Can you identify all the digits, th one group with the brown spot on it is tough to read.
Is the cam and lifters in good shape? I would like to see pictures of the lobes and how the lifters look...
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1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... 
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#3
11-19-2018, 05:00 PM
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Quote:
28-31-96 960894 2434 SR Cam and lifters are in pretty good shape. I'll post some pics later.
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1964 Catalina 2+2 4sp, 421 Tri-power 1965 GTO, Roadster Shop chassis, 461, Old Faithful cam, KRE heads 305 CFM, Holley EFI, DIS ignition. 1969 GTO 467, Edelbrock 325 CFM, Terminator EFI 1969 Firebird Convertible |
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#4
11-19-2018, 05:36 PM
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Is this the engine that was thought to be from factory original 1969 GTO w/base 400 ?
.
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
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#5
11-19-2018, 05:49 PM
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I couldn't find anything by googling, but I wonder if the 2434 is a clue. The popular Summit 2802 has 224/234 duration. As often as the summit cams are recommended on the forums, it seems quite likely. I hope we find out!
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#6
11-19-2018, 05:54 PM
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Quote:
     Virtually nothing is usable in this short block. The block is in the machine shop now, set up in the diamond hone. We're trying to get it to clean up with a 4.185 bore to use a Mahle piston. It's 4.181 now, with what has to be the only good news, about .0005 cylinder bore taper. Should know if I need another block by tomorrow.
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1964 Catalina 2+2 4sp, 421 Tri-power 1965 GTO, Roadster Shop chassis, 461, Old Faithful cam, KRE heads 305 CFM, Holley EFI, DIS ignition. 1969 GTO 467, Edelbrock 325 CFM, Terminator EFI 1969 Firebird Convertible |
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#7
11-19-2018, 07:25 PM
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That cam looks like a roller camshaft in the picture, that would explain the SR.
The lifter is a hydraulic flat tappet and it's an older lifter than isn't manufactured any more. I don't know who the manufacturer is but it's the same lifter Crane used to sell. I don't recognize the numbers on the back of the cam. I'm confident the cam isn't from Comp Cams or Crower. |
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#8
11-19-2018, 07:49 PM
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Paul,I was there and helped John pull it apart.Did not look like a roller cam to me.If you look down to lifter bores you can see the offset of a FTC.Tom
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#9
11-19-2018, 08:11 PM
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It wasn't original with those pistons.
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1979 Trans Am WS-6 .030 455 zero decked flat pistons 96 heads with SS valves 041 cam with Rhoads lifters 1.65 rockers RPM rods 800 Cliffs Q Jet on Holley Street Dominator ST-10 4 speed (3.42 first) w 2.73 rear gear __________________________________________________ _______________________________ 469th TFS Korat Thailand 1968-69 F-4E Muzzle 2 |
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#10
11-19-2018, 08:18 PM
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Quote:
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#11
11-19-2018, 08:30 PM
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I agree,the numbers could be confusing.First thing I noticed when we pulled the first head was the pistons.I was not there when John pulled the front cover and cam.Tom
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#12
11-20-2018, 01:41 AM
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I’ll take some more pics of the cam when I get back to it later this week. I measured an intake lobe at .308 lift, so I doubt it was a roller grind.
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1964 Catalina 2+2 4sp, 421 Tri-power 1965 GTO, Roadster Shop chassis, 461, Old Faithful cam, KRE heads 305 CFM, Holley EFI, DIS ignition. 1969 GTO 467, Edelbrock 325 CFM, Terminator EFI 1969 Firebird Convertible |
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#13
11-20-2018, 07:13 AM
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SR, service replacement maybe?
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#14
11-20-2018, 08:46 AM
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The 96# is reminiscent of a Crane Cam #...IIRC
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#15
11-20-2018, 10:42 AM
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https://www.summitracing.com/parts/c...w/make/pontiac But, if the lobe had a little wear, I assume that would mean that, when new, the lift with 1.5 rockers could have been closer to around .470 lift, which could be an 041 clone. The Summit site has lots of cams listed by lift. I count 10, with between .462 & .473 intake lift. Might be one of those listed. ??? https://www.summitracing.com/search/...rder=Ascending Could be a Summit 2802, with .466 intake lift. Might help to measure both an intake & an exhaust lobe, to see if if they're the same , or about how much difference there is, if any. https://www.summitracing.com/parts/s...w/make/pontiac This Crane has .467. https://www.summitracing.com/parts/c...w/make/pontiac This Voodoo has .468. https://www.summitracing.com/parts/l...w/make/pontiac Here's 4 cams with .469 or .470 lift, on both lobes. https://www.summitracing.com/search/...3%2B4294889911 The Melling SPC-8 would also be one of the 041 clones. https://www.summitracing.com/parts/mel-spc-8 Paul Spotts also sells the 041 clone. Don't have a clue what numbers any of these cams have stamped on the end. https://www.ebay.com/itm/Pontiac-Ram...wp5F:rk:1:pf:0 If the lobe you measured was an exhaust lobe, it could be a Summit 2801. https://www.summitracing.com/parts/sum-2801 Last edited by ponyakr; 11-20-2018 at 11:30 AM. |
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#16
11-20-2018, 10:42 AM
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Quote:
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1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down...
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#17
11-20-2018, 10:50 AM
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That's pretty close to .310 which would be correct for the 2802's .465 lift. SR could stand for Summit Racing, which just occurred to me. Lol. If you get .325 on the exhaust, it would be reasonable to assume 2802.
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#18
11-20-2018, 12:36 PM
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Quote:
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#19
11-20-2018, 12:53 PM
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Quote:
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1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down...
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#20
11-20-2018, 02:26 PM
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That's pretty close to .310 which would be correct for the 2802's .465 lift. SR could stand for Summit Racing, which just occurred to me. Lol. If you get .325 on the exhaust, it would be reasonable to assume 2802.
They did make quite a few camshafts with very close specs to the 2802 and despite these cams showing slightly different specs most of them are the same camshaft. Those selling them just "juggling" the numbers a bit to make it look like their own deal: H-O Ent. HC-01A 276 288 222 232 .470 .490 109 Crane H-278-2 278 290 222 234 .470 .490 114 56 Indian Adventures - 282 282 224 228 .470 .480 112 Comp. Cams XE268H 268 280 224 230 .480 .480 110 50 Edelbrock 5057 298 304 224 234 .470 .490 114 H-O Ent. 380k 290 300 224 234 .470 .490 117 Speed-Pro 1175 - - 224 234 .470 .490 112 Summit K2802 282 292 224 234 .470 .490 114 59 Wolverine WG1096 290 300 224 234 .470 .490 112 .......Cliff
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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