Posted By: SpareParts
48° cam core question - 03/09/14 06:31 PM
On a block with standard can journals is there a different can core because of the 48° lifters or is a standard can okay to use? Thanks, first of many questions to come 
48° cam core question
Posted By: J_BODY
Re: 48° cam core question - 03/09/14 07:28 PM
it took literally four months to find a usable core for my 9.2 deck 340 main, 48* siamese block with the babbit journals.
Posted By: clonestocker
Re: 48° cam core question - 03/09/14 07:33 PM
Jay, You never checked with the right person 
Posted By: Leon441
Re: 48° cam core question - 03/09/14 07:41 PM
I may still have a 48 degree for standard cam journals.
That are several 48 degree cores. standard journal, 2" babbit. 50mm roller, 60mm roller. Now I hear some have ran a 55mm roller.
If you waited months for one you did not call the right people.
Leon
That are several 48 degree cores. standard journal, 2" babbit. 50mm roller, 60mm roller. Now I hear some have ran a 55mm roller.
If you waited months for one you did not call the right people.
Leon
Posted By: SpareParts
Re: 48° cam core question - 03/09/14 09:28 PM
Quote:
I may still have a 48 degree for standard cam journals.
That are several 48 degree cores. standard journal, 2" babbit. 50mm roller, 60mm roller. Now I hear some have ran a 55mm roller.
If you waited months for one you did not call the right people.
Leon
So there is a difference between a 48° cam and a 59° cam?
This is an R1 block BTW. A standard cam out of my 360 fits perfect.
Posted By: Brian Hafliger
Re: 48° cam core question - 03/09/14 11:22 PM
So you guys have BBC main journal cam cores? Great, how much are you asking? What lobe sizes? What lca?
Thanks for letting us know!!
Thanks for letting us know!!
Posted By: tubtar
Re: 48° cam core question - 03/09/14 11:28 PM
Is your block actually 48 degree ? I think most of the R-1's were 59 , but it's easy enough to tell.
The 48 degree lifter bores will be visibly further away from the valley wall than the 59 degree.....and with the different lifter center line , you need to compensate for this with lobe location.
I don't think you can grind a 48 degree profile on a 59 degree blank , but I could be wrong. I seriously doubt an aggressive profile could be done.
The 48 degree lifter bores will be visibly further away from the valley wall than the 59 degree.....and with the different lifter center line , you need to compensate for this with lobe location.
I don't think you can grind a 48 degree profile on a 59 degree blank , but I could be wrong. I seriously doubt an aggressive profile could be done.
Posted By: SpareParts
Re: 48° cam core question - 03/09/14 11:33 PM
Quote:
Is your block actually 48 degree ? I think most of the R-1's were 59 , but it's easy enough to tell.
Yes, it is in fact 48°, it's got the goofy looking valley lol.
Posted By: tubtar
Re: 48° cam core question - 03/09/14 11:43 PM
Don't let the filled in valley be your guide.......340 replacement had this too , but it doesn't mean you have a 48 degree block.
The lifter bore center lines are roughly 1/2 " further from the valley wall on a 48 degree.
59 degree bores are very close to the valley wall and if you see the two side by side , it is easy to tell them apart.
The lifter bore center lines are roughly 1/2 " further from the valley wall on a 48 degree.
59 degree bores are very close to the valley wall and if you see the two side by side , it is easy to tell them apart.
Posted By: SpareParts
Re: 48° cam core question - 03/09/14 11:54 PM
Quote:
Don't let the filled in valley be your guide.......340 replacement had this too , but it doesn't mean you have a 48 degree block.
The lifter bore center lines are roughly 1/2 " further from the valley wall on a 48 degree.
59 degree bores are very close to the valley wall and if you see the two side by side , it is easy to tell them apart.
Good advice, I should have mentioned that the part number says it's 48.... that would have saved us some posts lol, scatter brained today
It's P4532435 if that helps
Posted By: J_BODY
Re: 48° cam core question - 03/10/14 12:11 AM
Quote:
So you guys have BBC main journal cam cores? Great, how much are you asking? What lobe sizes? What lca?
Thanks for letting us know!!
yeah I kinda thought we contacted quite a few folks on this matter...
Posted By: W5DART66
Re: 48° cam core question - 03/10/14 12:51 AM
The king of small block Knowledge has spoken .........
But until about 2 Months ago you could not get 48* 1.998" plain bearing cams.
Danny may at midway performance (Predator cams) had 150 cores made
On side note the OP the 48* with stepped bearings in stock at 2 or 3 cam grinders much easier to get the core you need
But until about 2 Months ago you could not get 48* 1.998" plain bearing cams.
Danny may at midway performance (Predator cams) had 150 cores made
On side note the OP the 48* with stepped bearings in stock at 2 or 3 cam grinders much easier to get the core you need
Posted By: CRIKEY
Re: 48° cam core question - 03/10/14 01:03 AM
To answer your question
NO you cant use a 59° cam in a 48° block even if the journals are the same.
NO you cant use a 59° cam in a 48° block even if the journals are the same.
Posted By: SpareParts
Re: 48° cam core question - 03/10/14 01:13 AM
Thanks guys.
Sad story I got to really looking it over at the shop after tubtar's posts, it looks like it's a 59° so must be a resto block?? Idk I searched the part number and found a ton of stuff saying it's 48° but sure doesn't look different. I'm into it cheap and it's better than what I had so it's not a total loss.
Sad story I got to really looking it over at the shop after tubtar's posts, it looks like it's a 59° so must be a resto block?? Idk I searched the part number and found a ton of stuff saying it's 48° but sure doesn't look different. I'm into it cheap and it's better than what I had so it's not a total loss.
Posted By: 1967dartgt
Re: 48° cam core question - 03/10/14 01:19 AM
Quote:
Thanks guys.
Sad story I got to really looking it over at the shop after tubtar's posts, it looks like it's a 59° so must be a resto block?? Idk I searched the part number and found a ton of stuff saying it's 48° but sure doesn't look different. I'm into it cheap and it's better than what I had so it's not a total loss.
Some of the blocks were messed up and had 48* cam core with 59* lifter valley! hope it's not one of those.
Posted By: 1967dartgt
Re: 48° cam core question - 03/10/14 01:22 AM
But I do have a 48* r1 block. So they are made.
Posted By: SpareParts
Re: 48° cam core question - 03/10/14 01:24 AM
I think I am alright, it fit a 59° cam just fine. I am new to the after market blocks and went off the part number (as did the seller) so no bad blood, I learned another lesson as I see it. And it was a deal, I've sold stock blocks for more.
I'll try and get it checked out by someone who knows it before I buy more lessons lol
I'll try and get it checked out by someone who knows it before I buy more lessons lol
Posted By: SpareParts
Re: 48° cam core question - 03/10/14 01:28 AM
How would a fella tell if it was for a 48° cam core?
Bare with me guys I'm learning
Bare with me guys I'm learning
Posted By: MR_P_BODY
Re: 48° cam core question - 03/10/14 01:39 AM
Quote:Quote:
Is your block actually 48 degree ? I think most of the R-1's were 59 , but it's easy enough to tell.
Yes, it is in fact 48°, it's got the goofy looking valley lol.
Then yes there is a special cam blank for a 48* babbit
block... a 59* the lifters are farther apart on the
cam itself and not ground on a 48* lifter angle so no
a 59* will NOT work
Posted By: fishy340
Re: 48° cam core question - 03/10/14 02:07 AM
Same here my r1a is so old that little plates were welded over the cam tunnel,thats how they use to beef it up.
I never ever saw a 59* block with the area above the cam solid like a 48* and i've had 3 restoration blocks which in my eyes is 100% an r series block.I wish i could post the picture instead of having to ask Brad or Brett..:)
I never ever saw a 59* block with the area above the cam solid like a 48* and i've had 3 restoration blocks which in my eyes is 100% an r series block.I wish i could post the picture instead of having to ask Brad or Brett..:)
Posted By: W5DART66
Re: 48° cam core question - 03/10/14 02:22 AM
Quote:
I think I am alright, it fit a 59° cam just fine. I am new to the after market blocks and went off the part number (as did the seller) so no bad blood, I learned another lesson as I see it. And it was a deal, I've sold stock blocks for more.
I'll try and get it checked out by someone who knows it before I buy more lessons lol
Can you take picture of lifter valley?
48* can have 59* stepped bearing or the 1,998" straight through.
Posted By: SpareParts
Re: 48° cam core question - 03/10/14 02:40 AM
Quote:Quote:
I think I am alright, it fit a 59° cam just fine. I am new to the after market blocks and went off the part number (as did the seller) so no bad blood, I learned another lesson as I see it. And it was a deal, I've sold stock blocks for more.
I'll try and get it checked out by someone who knows it before I buy more lessons lol
Can you take picture of lifter valley?
48* can have 59* stepped bearing or the 1,998" straight through.
#5 is smaller. I can email pictures if you would like to pm me your address. I don't really know how to post pics, kinda not the most technology keen guy
Posted By: 1967dartgt
Re: 48° cam core question - 03/10/14 02:44 AM
59* resto block
Posted By: 1967dartgt
Re: 48° cam core question - 03/10/14 02:46 AM
48* r3 block
Posted By: fishy340
Re: 48° cam core question - 03/10/14 02:54 AM
Thanks Brad there actually both resto blocks.The 48* one just got done and is 60mm now,it was babbit style deal.
Posted By: SpareParts
Re: 48° cam core question - 03/10/14 03:19 AM
Looks like I got me a 59° resto block. Cool, I think...
Posted By: MR_P_BODY
Re: 48° cam core question - 03/10/14 03:23 AM
Quote:
Looks like I got me a 59° resto block. Cool, I think...
You can check that 59* part easy... if you have a
rod that fits the lifter bore.. set the block level
and measure the rod (in the lifter bore) and see if
it says 48 or 59... if its a resto block they are fine
also
Posted By: SpareParts
Re: 48° cam core question - 03/10/14 03:31 AM
Good idea but it's looking like I have a 59° resto block. Not what I was hoping for but I think I can use it.
Posted By: tubtar
Re: 48° cam core question - 03/10/14 03:43 AM
The pics really show the big difference between 48 and 59 degree.
The distance between the bores and the valley wall and the spacing are pretty dramatic. As for telling the 48 vs. 59 degree cam blanks , I think the distance between lobes would be the easiest short of knowing the P/N or who made it and what they made.
The distance between the bores and the valley wall and the spacing are pretty dramatic. As for telling the 48 vs. 59 degree cam blanks , I think the distance between lobes would be the easiest short of knowing the P/N or who made it and what they made.
Posted By: MR_P_BODY
Re: 48° cam core question - 03/10/14 04:03 AM
Quote:
The pics really show the big difference between 48 and 59 degree.
The distance between the bores and the valley wall and the spacing are pretty dramatic. As for telling the 48 vs. 59 degree cam blanks , I think the distance between lobes would be the easiest short of knowing the P/N or who made it and what they made.
Yeah the 48* lobes are narrower than a 59* so they
will clear because they are closer together
Posted By: fishy340
Re: 48° cam core question - 03/10/14 04:21 AM
Quote:
Looks like I got me a 59° resto block. Cool, I think...
Nothing at all wrong with a good 59* piece.I bet 775hp can be made with the right combo for sure.
If your looking to stay under 8000rpm there is nothing wrong w 59* stuff.
Cylinder head selection for becomes an issue for more hp then mentioned.
Posted By: 1967dartgt
Re: 48° cam core question - 03/10/14 04:26 AM
Quote:Quote:
Looks like I got me a 59° resto block. Cool, I think...
Nothing at all wrong with a good 59* piece.I bet 775hp can be made with the right combo for sure.
If your looking to stay under 8000rpm there is nothing wrong w 59* stuff.
Cylinder head selection for becomes an issue for more hp then mentioned.
Don't forget you can run a w9 59* head with Brett's cnc program.
Posted By: CRIKEY
Re: 48° cam core question - 03/10/14 04:38 AM
Easy enough to measure with a vernier, the 48° has .660" between the lifter bores & the 59° has .860"
(this is not center line - more so between the lifters)
As mentioned before, the cam tunnel isnt the best way to try to identify it.
(this is not center line - more so between the lifters)
As mentioned before, the cam tunnel isnt the best way to try to identify it.
Posted By: SpareParts
Re: 48° cam core question - 03/10/14 04:43 AM
Quote:Quote:Quote:
Looks like I got me a 59° resto block. Cool, I think...
Nothing at all wrong with a good 59* piece.I bet 775hp can be made with the right combo for sure.
If your looking to stay under 8000rpm there is nothing wrong w 59* stuff.
Cylinder head selection for becomes an issue for more hp then mentioned.
Don't forget you can run a w9 59* head with Brett's cnc program.
I just so happen to have exactly that. Just need to figure out rockers and lifters and weld up the holes in the ports from the CNC job. Should make okay power
Posted By: J_BODY
Re: 48° cam core question - 03/10/14 05:14 AM
never get tired of reading up on these things!! .
.
Posted By: SpareParts
Re: 48° cam core question - 03/10/14 05:28 AM
Quote:
never get tired of reading up on these things!!
It's daunting! Lots of homework to do but I think it will be worth it. . . . or suck, I've been wrong before
