Speed-Talk is running on www.Speed-Talk.com

IMPORTANT: Update your bookmarks to https://www.speed-talk.com/forum/
(Right-click the URL and select "Bookmark this link")

Search found 258 matches

by rebelyell
Sun Nov 22, 2020 2:50 pm
Forum: Engine Tech
Topic: Crankshaft polish
Replies: 13
Views: 760

Re: Crankshaft polish

If you can feel their polishing and it's fugly; they should be avoided.
by rebelyell
Mon Nov 09, 2020 11:02 am
Forum: Engine Tech
Topic: Crankshaft grinding .... N.E. Missouri area ?
Replies: 5
Views: 214

Re: Crankshaft grinding .... N.E. Missouri area ?

Bethalto IL just above STL
http://www.performanceracingengine.com/

there must be at least a dozen shops in/around St Louis and I don't think there's anywhere in NE MO that's more than 100 miles from STL
by rebelyell
Sun Nov 08, 2020 4:24 pm
Forum: Engine Tech
Topic: Comparing Apples To Oranges! (Cams)
Replies: 21
Views: 786

Re: Comparing Apples To Oranges! (Cams)

Wow! Such a remarkably gracious intro! Perhaps you aced a Dale Carnegie course?
Ya know, you've joined-in on a site where there are lotsa rather knowledgeable, experienced guys; including a well-respected & successful cam designer-manufacturer.
Good luck in your endeavors. Out.
by rebelyell
Sat Nov 07, 2020 12:13 pm
Forum: Engine Tech
Topic: "Shop Truck" 350 SBC Cam And Carb Choice??
Replies: 18
Views: 959

Re: "Shop Truck" 350 SBC Cam And Carb Choice??

From stock 882 heads to vortec could easily gain 30-40 HP. :D Agreed, but with those flattops, compression will likely exceed 10.1:1 replacement vortec L31 dish pistons w/ metric ringpak are nice https://www.summitracing.com/parts/slp-h815dcp30/part-type/pistons H815 will likely put compression rig...
by rebelyell
Fri Nov 06, 2020 6:08 pm
Forum: Engine Tech
Topic: Summit’s pro sbc camshafts ?
Replies: 11
Views: 901

Re: Summit’s pro sbc camshafts ?

Not so bad if your choice is in their $220 - $250 list
USA, billet steel (not cast/austempered /sadi iron)
by rebelyell
Thu Nov 05, 2020 12:41 pm
Forum: Engine Tech
Topic: Max lift with GM dogbone roller lifters
Replies: 25
Views: 957

Re: Max lift with GM dogbone roller lifters

large base circle cam
check out the cam rings & lobes in this P&W double wasp radial aircraft engine; base circle OD must be at least a foot.
https://www.youtube.com/watch?v=EyPvpdy4dgg
by rebelyell
Thu Nov 05, 2020 8:32 am
Forum: Engine Tech
Topic: Balancing Experts....
Replies: 12
Views: 664

Re: Balancing Experts....

I'm neither expert or journeyman; but have some balancing experience. I suggest we hear from those with far more direct experience. Don't know, but can imagine mass diff between the two bearing types is so small that it would be significant to only true pro race motors. AFAIK, balance is important e...
by rebelyell
Tue Nov 03, 2020 5:49 pm
Forum: Engine Tech
Topic: 1998 vortec
Replies: 7
Views: 384

Re: 1998 vortec

that 400 has no provision for OE roller lifters like that 98 vortec motor does. Lotsa folk don't wanna hassle w/ flat tappet break-in etc. Good retro-fit roller lifters are pricey. Is that vortec block & internals rebuildable ? What's the autopsy ? Good replacement OE-type roller lifters are inexpen...
by rebelyell
Tue Nov 03, 2020 5:13 pm
Forum: Engine Tech
Topic: 377 vortec
Replies: 22
Views: 580

Re: 377 vortec

If you can swing it; 406".
400 crank, 6" rods, ~ 16cc - 22cc reverse dome pistons w/ about 1.125" comp distance (Mahle, Sealed Power, Wiseco/ProTru etc) and pay to have it all balanced.
by rebelyell
Sun Nov 01, 2020 5:23 pm
Forum: Engine Tech
Topic: Max lift with GM dogbone roller lifters
Replies: 25
Views: 957

Re: Max lift with GM dogbone roller lifters

I read some where when using OE L31 lifters, the max lobe lift is about .350" any more than that & cam may have reduced base circle and allow lifter to drop below dog bones' grasp; boom There are pricey reduced travel lifters which may help you; I've never used one. Also, if lifters' oil band rises ...
by rebelyell
Sat Oct 31, 2020 9:57 pm
Forum: Engine Tech
Topic: Rocker arm?
Replies: 23
Views: 1534

Re: Rocker arm?

Interesting idea about using valve grind compound to lap ball against rocker seat, maybe use cam moly lube instead to establish wear pattern and try to replicate rocker arc at same time while polishing. Idea not original to me. I think the moly lube (or any lube) will only serve to prevent wearing-...
by rebelyell
Sat Oct 31, 2020 9:42 pm
Forum: Engine Tech
Topic: Rocker arm?
Replies: 23
Views: 1534

Re: Rocker arm?

JMO. Seems your rules tightly restrict valve spring; looks a lot like "Z28" aka RV943 or maybe +100 taller RV1943 spring specs. If so, No girdle ain't much to fret about. Seems springs like that'll also self-limit cam. YMMV
by rebelyell
Wed Oct 28, 2020 2:58 pm
Forum: Engine Tech
Topic: Piston quality?
Replies: 9
Views: 776

Re: Piston quality?

Schurkey wrote: Mon Oct 26, 2020 2:08 am Is there anything that company sells that's worth it's weight in poop?
why soytunly ! any & all those sold by skippy the white :^o are the bees knees :wink:

pistons by CP or Diamond or Mahle are also good