Who has theirs installed and up and running on a near stick build? What did u use for rockers and pushrods? .506 lift with hydraulic lifters. Thanks. Kim
Good info on the rockers. The Speedmaster rockers look like Comp copies and look a mile off. A buddy tried my Speedmasters on his Eddy heads and switched to Harlan Sharp for the win. I don't think he shimmed them at all.Not running yet but I used Hughes 1.5:1 rockers and custom Smith Bros. Pushrods. I don't recall the length. Lunati VooDoo Hydro Advertised Duration (Int/Exh): 268/276; Duration @ .050 (Int/Exh): 226/234; Gross Valve Lift (Int/Exh): .494/.513; LSA/ICL: 110/106. Heads were ported and set up by MRL so these were purchased as bare heads.
The Comp Magnum (not Ultra Pro) rockers I had didn't line up well geometry wipe wise, a kit from B3 fixed that but the tunnels got in the way even after opening them. The Hughes fell right in with a small shim, but that was these heads.
Good info on the rockers. The Speedmaster rockers look like Comp copies and look a mile off. A buddy tried my Speedmasters on his Eddy heads and switched to Harlan Sharp for the win. I don't think he shimmed them at all.
Thay could be the same rockers.Harland would have been my second choice but my dad did Hughes on his 440 with 915 head and they fell into place.
360? Nice flat torque curve.Hard to see the data...... printer was about out of ink.
Not a great build....... not out combo.
The short block arrived assembled(stock type rebuild, dished pistons way down the hole)..... they had some industrial heads to put on it...... told them that probably wasn’t a great option for trying to make power....... they bought some SM’s.
PRW rockers that needed clearancing, RPM intake, xe268 cam, Ede 750 carb.
331.5hp@5200
View attachment 1715536660
XE268, seems like a rather mild cam.Eh....... it’s kind of a dud imo.
I had tested one a few weeks earlier that had a better combo for a short block, bowl blended J heads(230cfm), LD340, same headers, another Ede 750, small custom solid cam........ just blew this thing into the weeds.
Made 89hp more.
We were thinking the SM combo would at least be in the 1hp/ci range(365hp)...... but iiwii.
Just goes to show it really is all about the “combination”, and that one “special” part(in this case, the heads) isn’t going to do much for you.
I think it would have made about the same power with minimally tweaked 1.88 valve 360 heads.
What were the issues with the stock rockers?I mocked up stock rockers. No go. Tried the old Hughes 1.6 Rockers. Need clearancing for sure. Likely a B3 kit also. Kim
I'd bet they're pretty good on just about anything!The Hughes are excellent on the Speedmasters. Kim
Ahhhh. Good to know. Thanks!These are the older Hughes rockers made by Probe exclusively for Hughes. If u wanted them u had to buy from Hughes, Probe wouldn’t sell them to anyone else. Kim
XE268, seems like a rather mild cam.
I used the 1.6 rockers I have just to see where they may end up at. The roller was almost centered and moved a hair to the inside. I never measured the width. This motor is planned out with 1.5 ratio so we won’t be using the 1.6s as it will be street friendly for his wifey. Kimkim how did you check the geometry?
roller in the center or narrowest stripe
or both?
tks