Post by: Ridgerunr on December 30, 2018, 03:57:30 PM
Post by: prodrag1320 on December 31, 2018, 07:38:52 AM
Post by: Ridgerunr on December 31, 2018, 02:43:05 PM
Post by: TorqueInc on December 31, 2018, 03:47:24 PM
I would not excessively surface a set of heads just to run a 570 cam
Great cam......just others out there that would be better for a heavy bagger
Zippers 587 is a go to cam with a bump in compression
Would strongly suggest rebuilding the heads.....valvejob,seals,springs.
They would be off.....good time to do it
Post by: Ridgerunr on December 31, 2018, 08:25:23 PM
Post by: HD Street Performance on December 31, 2018, 08:44:23 PM
Post by: prodrag1320 on January 01, 2019, 09:21:22 AM
Post by: Ridgerunr on January 01, 2019, 10:10:22 AM
Conveniently available are a good selection of .001 and .005 OS pistons so a light hone can bring the cylinder back in for a fresh start. I too would recommend a refurb on the heads which includes a more sensible but not beehive spring selection when done here. The compression can be picked up by 0 decking the cylinders and a small dome, if needed.
What about porting? Or are the ports untouched good for 120/120?
Post by: 1roadking on January 01, 2019, 12:13:51 PM
Post by: HD Street Performance on January 01, 2019, 12:34:40 PM
At this point just grab the Suburban speed 10.7 to 1 117 slip on kit and call it a day :)There are a number of things that become constraints at about the 110" 115hp level including the throttle body, injectors, and the heads. Understand this is not a line in the sand but a gradual decline showing as an early drop off at high rpms. Torque remains. The 117 kits fix this with the proper pieces. The 117 kit with head work is a sweet combination, better yet don't use the kit and just the cylinders and use KB domed pistons, cam and throttle body and purchase a heavy breather. The 259E cam is much maligned but turns on real well with the combination I am describing.
Post by: busarealfast on January 01, 2019, 08:02:06 PM
Post by: TorqueInc on January 01, 2019, 08:45:29 PM
TorqueInc, what is concidered ideal C.R. for the 587 cam?
Down south 9.8-9.9
Up north 10:1
10.2 with a killer tune
Post by: Ridgerunr on January 02, 2019, 09:29:23 AM
I'll assume that answers my question on porting.
Post by: HD Street Performance on January 02, 2019, 04:43:36 PM
Post by: MCE on January 09, 2019, 10:05:37 AM
Post by: MCE on January 09, 2019, 10:15:32 AM
What kind of power can be expected using S&S .570 cams in a 110" keeping the stock pistons and ported heads?
You'll need to get the compression up to a reasonable level for a S&S 570 (around 10:1). Milling the crap
out of the heads is not the way to accomplish that. Head milling is for fine tuning the CR, not for making
drastic changes. (There are allot of reasons why that's the case)
Put a dome in there to get it close to what you're wanting, then mill them a little (if needed) to bring it up
to where you want it. 5-6 CC domes are going to be needed.
If you mill too much off the head to get the squeeze right, you end up with valve to piston clearance and
intake manifold fit problems. Put pistons in it!
Post by: Ridgerunr on January 09, 2019, 07:29:57 PM
What are you doing on the M8 heads as far as springs? (They're using bee-hives)
M8 cams have less lift, no?
Post by: MCE on January 09, 2019, 10:44:43 PM
Post by: Ridgerunr on January 11, 2019, 10:21:59 AM
Post by: Unbalanced on January 11, 2019, 02:24:19 PM
I have a WT TC24D in a stock 110 that does pretty good (110/124). They don't make that cam anymore, but isn't a GMR 577 close to the 24D?
Post by: busarealfast on January 12, 2019, 09:15:45 AM
Post by: Johnchev89 on January 13, 2019, 06:24:50 PM
I'd go .010 over. Priced pretty reasonable too
Post by: Ridgerunr on January 13, 2019, 07:30:47 PM
Keith Black part # 661c. Has a 4.2cc some. Would get you right at 10.0 to 1 with your stock heads.
I'd go .010 over. Priced pretty reasonable too
:2vrolijk_21:
Post by: MCE on January 29, 2019, 10:31:04 PM
Keith Black part # 661c. Has a 4.2cc some. Would get you right at 10.0 to 1 with your stock heads.
I'd go .010 over. Priced pretty reasonable too
Right on! KB pistons are very good and priced reasonably. I like them.
Post by: HD Street Performance on January 30, 2019, 10:43:10 AM
Post by: MCE on February 09, 2019, 01:16:39 AM
Have another look in their catalog and instructions. The KB661LCA std is .001 os and allows a slight hone to bring it in plus has the line2line coating, a plus. Or is also available in .005 in that version. Put it in plates and hone only, no boring needed.
How are you torquing those down? (I don't see any bolt holes in those plates) Just wondering.... thanks
Post by: HD Street Performance on February 09, 2019, 11:49:07 AM
Post by: MCE on February 11, 2019, 11:31:20 AM
Never work on pans or shovels? Arp studs washers and nuts.Yes, but I try not too.
I'm talking about about bolting the top plate to the cylinder, I see it now. (Mine have through holes)