I've got a Comp roller (11-773-8) and I'm wondering if I should use a bronze tipped fuel pump pushrod or can I get away with a standard ARP one? Mike (Wolfplace) recommended a melonized distributor gear (Comp said no bronze needed...yeah I know) but I wanted to make sure before I fired up the motor.

Thanks.

ttt

If its ground on a billet core you don't need the melonized dist.gear and I'm sure its the same with the fuel pump rod :confused: mine is 11-000-9

If it's a billet core, a bronze-tipped push rod is a good idea. Maybe not necesary, but cheap insurance against a possible problem.

Somebody is making billet cores with cast-iron dist gears on them, seems like alot of the cam grinders have gone to using them. They're quite common all of a sudden. I've got one like that laying around myself. It just needs a stock type ("melonized", which is a trade name for austempered) gear on the dist.

11-000-9 is their universal part # for a custom grind; 11 = BBC, 000 = custom. For that, you'll need to call them and ask them, give them the work order # off of the front nose of the cam, and they can probably tell you which core they used.

No, the fuel pump eccentric is not the same as the dist gear; I've never seen a billet cam with an autempered fuel pump eccentric on it. So, whatever is true of the dist gear, doesn't necessarily apply to the FP eccentric.

The -8 is a cast core & I won't go into my opinion of solid cast cores but you do need to use the GM melonized gear. Do not use anything else.
MSD has a "marine" gear that I believe is the GM gear as it looks identical & this is what they say it is only honed .500"
You are not supposed to need a bronze fuel pump rod with a -8 cam & I have a few -8 hyd cams with lots of hours on them with the standard rod.

Again, to be clear on the gear, I said to use the GM melonized gear not the standard one MSD comes with that they say is melonized on the -8 cams.

Mike,

Go ahead and give your opinion, while your at it, let them in on the pictures I shared with you of the 4 roller cam lobes that have the cirumferential groove worn in completely around the lobe! Everyone thinks a roller is a fix all for lifter bore indexing and other issues. Other than a billet core, it couldn't be any further from the truth.

Originally posted by GRN69CHV:
Mike,

Go ahead and give your opinion, while your at it, let them in on the pictures I shared with you of the 4 roller cam lobes that have the cirumferential groove worn in completely around the lobe! Everyone thinks a roller is a fix all for lifter bore indexing and other issues. Other than a billet core, it couldn't be any further from the truth. Hi Joe,,
I think you pretty well covered my opinion :D
I have seen too many cast core solids that looked like yours to get real excited about wanting to run one again :(

Originally posted by Wolfplace:
The -8 is a cast core & I won't go into my opinion of solid cast cores but you do need to use the GM melonized gear. Do not use anything else.
MSD has a "marine" gear that I believe is the GM gear as it looks identical & this is what they say it is only honed .500"
You are not supposed to need a bronze fuel pump rod with a -8 cam & I have a few -8 hyd cams with lots of hours on them with the standard rod.

Again, to be clear on the gear, I said to use the GM melonized gear not the standard one MSD comes with that they say is melonized on the -8 cams. Mike, (and everyone else)

Thanks. I ordered a GM melonized gear and later came across the MSD one--now I'll pass on it. I haven't found a part number for the marine gear. I think I'll just use the GM one and get it honed. By the way Mike, I followed your suggestion on the springs (953s) and swapped them today. Thanks for the peace of mind! A little closer to firing up the 540!

graemlins/hurray.gif

Mines a solid "special roller",guess thats why the part# don't show up,,,billet core,cast gear pretty close to the xr286r on a 107 LSA. Its not in the car yet,but I can't wait smile.gif

Originally posted by Rapid Robert:
Mines a solid "special roller",guess thats why the part# don't show up,,,billet core,cast gear pretty close to the xr286r on a 107 LSA. Its not in the car yet,but I can't wait smile.gif =

If it's a Comp the part number should be 12-000-9 for a billet & -8 for a cast one & then it should have the lobe numbers listed like 4875/4876 R7 for a XR286 on a 107 ;)

4875s/4876s sr107.0 to be exact Mike. but the P# is 11-000-9

Sorry about that, I'm used to small blocks,, hence the 12 graemlins/clonk.gif