Re: New Stroker Combo Going Together - Thoughts?
[Re: JACK1440]
#2044669
04/02/16 08:07 PM
04/02/16 08:07 PM
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Joined: Jan 2003
Posts: 14,506 So. Burlington, Vt.
fast68plymouth
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I Live Here
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So. Burlington, Vt.
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What rockers were you running before? Do you know what part number springs are on the heads, and the installed height?
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: New Stroker Combo Going Together - Thoughts?
[Re: JACK1440]
#2044892
04/02/16 11:51 PM
04/02/16 11:51 PM
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Joined: Jan 2003
Posts: 14,506 So. Burlington, Vt.
fast68plymouth
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I Live Here
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Installed at 1.900-1.920 that's a decent spring for a moderate rate roller cam up to about .660-.670 net lift. And, at roughly 600lbs open pressure, that's all the spring you want to use with those rockers.
IMO, you don't have the valvetrain components necessary to run any of those big cams you have.
The exhaust ports on those heads are rather small for that sized motor, along with the in/ex ratio not being ideal, so I would lean towards a cam with 10-12 deg split to try and help extend the upper end of the power band.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: New Stroker Combo Going Together - Thoughts?
[Re: JACK1440]
#2044941
04/03/16 12:36 AM
04/03/16 12:36 AM
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Joined: Jan 2003
Posts: 14,506 So. Burlington, Vt.
fast68plymouth
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I Live Here
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So. Burlington, Vt.
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I don't know where you have those springs installed, but if you were running over .700 lift with them, you may want to have them tested before reusing them. The .690 cam would be okay with them...... After lash and deflection it would be .660ish lift at the valve with those crane gold 1.5's.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: New Stroker Combo Going Together - Thoughts?
[Re: JACK1440]
#2045290
04/03/16 01:52 PM
04/03/16 01:52 PM
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Joined: Jan 2003
Posts: 14,506 So. Burlington, Vt.
fast68plymouth
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I Live Here
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So. Burlington, Vt.
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Comp shows a coil bind height of 1.160 for the 943 spring. Installed at 1.900(the "recommended" installed height), that puts the spring into coil bind at .740 net valve lift.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: New Stroker Combo Going Together - Thoughts?
[Re: JACK1440]
#2045360
04/03/16 02:40 PM
04/03/16 02:40 PM
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Joined: Dec 2007
Posts: 77 British Columbia Canada
Challenger340
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member
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Posts: 77
British Columbia Canada
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The old 289/.690" Comp is no slouch, easy on parts, and can make very good power. We've seen 849hp 753 Trq using it on a 540 with ported INDY "SR" heads, which granted have a better Exh than the EZ Head, nonetheless, pretty forgiving old grind. https://www.youtube.com/watch?v=VzWhkC4dAI0We've moved on to a newer SF750 Bench nowadays, so no point going over "where" we had the SR's on the old Bench(they took us some time), but I suspect not that much better than your EZ's.
Better to be a "has been" than a "never was".
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Re: New Stroker Combo Going Together - Thoughts?
[Re: Challenger340]
#2045672
04/03/16 08:59 PM
04/03/16 08:59 PM
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Joined: Aug 2007
Posts: 2,449 nc
earthmover
top fuel
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top fuel
Joined: Aug 2007
Posts: 2,449
nc
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The old 289/.690" Comp is no slouch, easy on parts, and can make very good power. We've seen 849hp 753 Trq using it on a 540 with ported INDY "SR" heads, which granted have a better Exh than the EZ Head, nonetheless, pretty forgiving old grind. https://www.youtube.com/watch?v=VzWhkC4dAI0We've moved on to a newer SF750 Bench nowadays, so no point going over "where" we had the SR's on the old Bench(they took us some time), but I suspect not that much better than your EZ's. Nice care to share that build..
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Re: New Stroker Combo Going Together - Thoughts?
[Re: earthmover]
#2045733
04/03/16 10:21 PM
04/03/16 10:21 PM
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Joined: Dec 2007
Posts: 77 British Columbia Canada
Challenger340
member
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member
Joined: Dec 2007
Posts: 77
British Columbia Canada
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The old 289/.690" Comp is no slouch, easy on parts, and can make very good power. We've seen 849hp 753 Trq using it on a 540 with ported INDY "SR" heads, which granted have a better Exh than the EZ Head, nonetheless, pretty forgiving old grind. https://www.youtube.com/watch?v=VzWhkC4dAI0We've moved on to a newer SF750 Bench nowadays, so no point going over "where" we had the SR's on the old Bench(they took us some time), but I suspect not that much better than your EZ's. Nice care to share that build.. Sure, whadda ya wanna know ? Built/Machined/Porting etc., originally way back in the late 90's early 2000, the video was after refreshening again back in 2010, cliff runnered up with it again that year at the MATS show. We call it "Ol faithful" because the Engine must have 3000 hits on it over the 15-16 years, with freshenings about every 4-500. Doing VERY WELL for what it is, but Cliff does equally good with thermally stabilizing and taking care of the maintenance. He knows how to run and maintain it.... so no "problems" whatsoever. Pretty K.I.S.S. build. Mega Block, now @ 4.530" Eagle 4.250 Crank W/2.200" 7.100 Eagles W/2000 upgrade JE 2618 Dome Piston, "off the shelf" Std Speed Pro 1/16, 1/16, 3/16 Ringpack, Plasma Moly/Ductile/ SSOU 50 (std tension) INDY SR's, heavily worked(but no holes or epoxy) INDY & #8896 Holley progressive 4500 Comp 287"? or 289?(I forget)/.690"... the first grind. Comp std Roller Lifters(back for rebuild each freshening. Used to run Crane Golds, which we would just cycle out about ever 3 seasons just for good measure, never a problem, but moved to Harlands a few years back when Gold's went nla with Crane down. This particular Engine could ignite a very interesting discussion regarding what is "optimum" quench distance on a 4.500" Bore Engines. Suffice to say, our testing does NOT support sub .050", which we consider a 4.00" Bore Engine number ? Just my thoughts, no wars wanted.
Better to be a "has been" than a "never was".
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Re: New Stroker Combo Going Together - Thoughts?
[Re: JACK1440]
#2263181
03/04/17 12:35 PM
03/04/17 12:35 PM
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Joined: Jan 2003
Posts: 10,011 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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I Live Here
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Frostbitefalls MN (Rocky&Bullw...
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Have you considered going right to a better head now? I didn't when i had the chance years ago and painted myself into a financial corner, and am now limited to 440-1 heads. You might want to sharpen your pencil and see what it would take to build what you want now, rather than after you put $$$$$$ in good rockers, the right cam, converter, gears, etc. In my case i would have gone with B1Mc heads if i had thought enough about my future goals. Instead I started with pocket ported heads, then had bigger valves and a full port done, and finally tried an even bigger intake valve combo. I would have some $$ left over had i done it right the first time.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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