BobW Posted April 4 Posted April 4 This cam is in an '87-'95 block. I'm not having any luck searching the numbers. Someone thought it might have been a Crane cam, but they are out of business and no info seems to be around. Quote
420ponies Posted April 6 Posted April 6 (edited) Sounds pretty healthy . Is it a hydraulic roller cam or a Flat tappet style? I would think a hydraulic roller in that block. I'm leaning toward maybe a Edlebrock cam? Did you check the total lift of it at the spring? Are those Marine Engine style valve covers? That cam number looks familiar . Edited April 6 by 420ponies spelling 4 Quote
BobW Posted April 6 Author Posted April 6 21 minutes ago, 420ponies said: Sounds pretty healthy . Is it a hydraulic roller cam or a Flat tappet style? I would think a hydraulic roller in that block. I'm leaning toward maybe a Edlebrock cam? Did you check the total lift of it at the spring? Are those Marine Engine style valve covers? That cam number looks familiar . Definitely a hydraulic roller cam. Front cam retainer has T30 screw heads that seem kind of soft when I tried to remove them to see if there is a nane on the front of the cam. Unknown what the valve covers are, it does have rocker rollers as well. Haven't measured the lift as yet. May pull a head (461 double hump w/ large valves) to measure bore & stroke. 3 Quote
420ponies Posted April 7 Posted April 7 Chevrolet Hydraulic Roller Camshaft SKU: 00471LM Chevrolet - 262, 267, 283, 302, 305, 307, 327, 350 & 400 Performance level 4 - High Lift - Street/strip applications, rough idle, 2500 stall required. INT/EXH - Dur @ .050” Lift: 236°/240° RR: 1.5/1.5 Gross Lift: .555”/.559” LSA: 110° RPM:2400 to 6000 Redline: 6500 Learn More $442.47 3 Quote
420ponies Posted April 7 Posted April 7 Bob, This could be what is in that SBC. I'd call them to ask ,maybe send that picture of the stamp on the back of that cam. Found this on their website. I can remember those stamping marks from way back, we were exclusive with Crower for many of our engine builds. 3 Quote
BobW Posted April 7 Author Posted April 7 7 hours ago, 420ponies said: Bob, This could be what is in that SBC. I'd call them to ask ,maybe send that picture of the stamp on the back of that cam. Found this on their website. I can remember those stamping marks from way back, we were exclusive with Crower for many of our engine builds. I sent them an email with the pic, hopefully I'll get some good news! 1 Quote
BobW Posted April 8 Author Posted April 8 6 hours ago, BobW said: I sent them an email with the pic, hopefully I'll get some good news! Crower says it's not theirs, the search goes on. 1 Quote
72 Monte Carlo Posted April 8 Posted April 8 Your cam has 4714L stamped on it, and the Crower cam is 00471LM, which didn't match up to me. I was trying to locate the 4714L on an old Crane Cam catalog for a SBC, but I didn't see it listed in there either. 1 Quote
BobW Posted April 8 Author Posted April 8 3 minutes ago, 72 Monte Carlo said: Your cam has 4714L stamped on it, and the Crower cam is 00471LM, which didn't match up to me. I was trying to locate the 4714L on an old Crane Cam catalog for a SBC, but I didn't see it listed in there either. LOL, I actually just finished searching the Crane catalog my self! I guess I'll have to go the degree wheel, lift measurement route to figure out what this engine has...... Quote
72 Monte Carlo Posted April 8 Posted April 8 I didn't see that cam part number listed on a Isky cam catalog 1 Quote
70white402 Posted April 8 Posted April 8 This guy was looking for the same cam as you. I think he said it was a comp cam marine. 2 Quote
72 Monte Carlo Posted April 8 Posted April 8 What I came up with is that it's quite possibly a GMPP 4714L hyd roller cam for the LT1 engine. The cam in this link is the same number 4714 but with a yv on the end. https://www.hotrodders.com/threads/roller-camshaft.546375/ 2 Quote
BobW Posted April 8 Author Posted April 8 10 minutes ago, 72 Monte Carlo said: What I came up with is that it's quite possibly a GMPP 4714L hyd roller cam for the LT1 engine. The cam in this link is the same number 4714 but with a yv on the end. https://www.hotrodders.com/threads/roller-camshaft.546375/ That gives me some measurements to check without further disassembly, thanks! I'll report back when I get them 1 Quote
420ponies Posted April 9 Posted April 9 Man, I've done the exact thing others here have been looking for. Came across the same stuff. That Hotrodder's was the closest ,but I didn't think they would put a marine cam in it. Then again, my BBC cam specs are consistent with a marine cam, just different LSA (108 degrees) 2 Quote
BobW Posted April 9 Author Posted April 9 5 hours ago, Montemedic said: Inquiring minds want to know !!! Yeah, me too! It will be a few days until I can get to use my dial indicator to check the lift. I'm borrowing an engine stand from a friend. The cobbled together run stand doesn't lend itself to easily disassemble the motor. If the lift figures vary from those above, I'll see about finding a degree wheel. 3 Quote
BobW Posted April 10 Author Posted April 10 (edited) Sooo, I got the motor on the stand and decided to pull a valve cover. The heads have CompCam 1.52 roller rockers. I managed to securely mount the dial indicator on the steel lift plate. I measured the valves on #1 & 3# by putting the needle on top of each valve and got the needle at the same angle as the valve stem. Both cylinders measured the same, intake .465, exhaust .487. Probably not the most accurate techniquebut it was consistent through 4 cycles of each valve. I still have to pull the pan to measure bore & stroke. Also have to pull the front cam retainer to see if there are any additional numbers there. And the valve covers have a number 141-910. Proform lists that valve cover # with Chevrolet and a Bowtie on them, these are plain. Edited April 11 by BobW Valve cover info found. 3 Quote
BobW Posted April 16 Author Posted April 16 I'm getting close to doing the engine swap. Is it possible to do it without removing the hood? It seems with the shroud and radiator removed there should be enough room to pull the engine forward (transmission is staying in place) and lift it clear. Quote
DragCat Posted April 16 Posted April 16 13 hours ago, BobW said: I'm getting close to doing the engine swap. Is it possible to do it without removing the hood? It seems with the shroud and radiator removed there should be enough room to pull the engine forward (transmission is staying in place) and lift it clear. Is it possible, yes, have people done it, yes. I did not 🤣 Pull off all the accessory stuff, pullys/belts prior. I left the a/c and p/s connected, just tucked outta the way PS. don't forget to support the front of the trans since your leaving that in place 3 Quote
420ponies Posted April 16 Posted April 16 You should have no problem leaving the hood on. I'd remove the water pump, lower pulley, accessories, use a lift plate and pull from the intake carburetor base. This way you will have all that extra room. 3 Quote
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