572, small steps forward
#2735552
01/22/20 11:50 AM
01/22/20 11:50 AM
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Joined: Jan 2003
Posts: 17,801 S.E. Michigan
ZIPPY
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Checked stem to guide clearance on these Victor heads, best as I could. My first time using this Swiss Etalon mic, which is probably about as old as I am.
Anyway it seems like Edelbrock did a nice job. The intakes are all in the .0011 to .0014 range. The exhaust are all in the .0034 to .0035 range. This seems safely loose enough.
Moved on to spring selection and went and backordered what I need. A friend of many decades from Oregon, originally met here on the first incarnation of the board way back when, helped me out with retainers and spring cups so that was all set, and I was locked into a 1.550 OD spring probably a year ago. Leaned something- K motion 7320 and Comp 732: exact same retainer. Probably come from the same supplier.
I will be running a mild .640 (gross) street roller fairly close in specs to what I have in my current wedge engine and was tempted to use close to the same components as the Wedge, but these heavy iron hemi rocker arms + the comments of pros pointed me towards adding some spring load, so I added about 73lbs open pressure (on paper) to what I had in the wedge engine.
Seems kind of old fashioned but I might hand lap the valves just to have a look at that interface. If there is an issue, maybe it will be visible in the lap line (or not).
Rich H.
Esse Quam Videri
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Re: 572, small steps forward
[Re: ZIPPY]
#2735571
01/22/20 12:36 PM
01/22/20 12:36 PM
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Joined: Jan 2003
Posts: 17,801 S.E. Michigan
ZIPPY
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I know the separator springs usually work fine, but I haven't had good luck with them on Wedge.
The thin tube pressed into the exhaust pushrod hole (to allow them to go hog wild with the intake port) is cool. But I was (maybe unnecessarily) concerned the exhaust pushrod could touch the tube/bad stuff following. Eventually decided to use the standard style MP exhaust rocker + collars and spacers to make sure that contact wouldn't occur. The different rocker created more clearance to the tube.
You can see to the left of the intake needs a good sized spacer. I backordered some harland sharp wedge spacers for that. Another lesson learned......the shafts are all 7/8. Small block, big block, gen 2, doesn't matter. Before I got these Indy shafts from Todd M. per his recommendation, I actually used an extra small block shaft to mock up a pair of rockers here and there, to get a preliminary plan and figure out what I wanted to do. The shafts don't even have to bolt on at that point, to give you a visual idea of how it's gonna go.
I bought the Jesel pushrod length checker and played with that. Pushrod length trial and error played a bigger part in pushrod clearance to the tube than I expected. Once I had that dialed in and was happy with pushrod clearance, I had to go back and check with the Indy exhaust rocker to make sure I was not fooled by anything. The MP rockers just looked safer to me from a clearance POV.
When I knew my desired pushrod length, I then decided to get the Manton tool steel adjusters per Rich N. Maybe overkill for a street roller application, but I wanted to do this right. Turns out they were different enough from the Indy adjusters that it was best for me to go through pushrod length again. Al at Manton was nice to work with and he suggested .095 wall series 5. 3/8". I'm going to try oiling through the pushrods since Andy set me up with oiling lifters a year or so ago, so ordered them with oil holes.
Lots of good advice received on this deal, and lots of help with parts.
More to come, hopefully sooner rather than later.
Rich H.
Esse Quam Videri
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Re: 572, small steps forward
[Re: ZIPPY]
#2735599
01/22/20 02:01 PM
01/22/20 02:01 PM
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Joined: Oct 2007
Posts: 4,205 New York
polyspheric
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master
Joined: Oct 2007
Posts: 4,205
New York
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the shafts are all 15/16 B/RB OEM shaft .875"
An FEA of that exhaust rocker would light up red in some strange places, I have idea what they were thinking. The intake rocker is classic "dorsal fin" design, 100 years old).
Boffin Emeritus
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Re: 572, small steps forward
[Re: polyspheric]
#2735607
01/22/20 02:20 PM
01/22/20 02:20 PM
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Joined: Jan 2003
Posts: 17,801 S.E. Michigan
ZIPPY
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the shafts are all 15/16 B/RB OEM shaft .875" Good catch, edited to say 7/8. LA small block same OD as well. I like the fraction since it's easier for me to communicate verbally. Probably why I built a 4&1/2 square configuration too. Can even use a broken piece of an old junk shaft for mockup, to make various tools from, or whatever since they're all the same. I have worked with alot of folks who used FEA but have almost zero knowledge or practical application of it personally. Good to know, anyway. Thanks for chiming in.
Rich H.
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Re: 572, small steps forward
[Re: BradH]
#2735609
01/22/20 02:30 PM
01/22/20 02:30 PM
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Joined: Jan 2003
Posts: 17,801 S.E. Michigan
ZIPPY
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I'm going to try K-1150 springs.
I know alot of people here have had bad luck with their harder materials like tool steel springs, but their M300 material seems plenty streetable to me from past use (k1100 in the wedge, only two sets over all these years and changed out 'just because').
Rich H.
Esse Quam Videri
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Re: 572, small steps forward
[Re: ZIPPY]
#2735622
01/22/20 03:13 PM
01/22/20 03:13 PM
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Joined: Jan 2003
Posts: 13,319 Marion, South Carolina [><]
an8sec70cuda
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Hemi valvetrain is heavy...gonna need more spring pressure than a wedge. I think the pushrods in my hemi might weigh more than the connecting rods, lol. I need to look at my notes (in the shop at home) to see where I set mine, but your exh stem clearance sounds really loose to me.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: 572, small steps forward
[Re: an8sec70cuda]
#2735632
01/22/20 03:58 PM
01/22/20 03:58 PM
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Joined: Mar 2006
Posts: 2,675 Mt. Eden Ky.
Hemi Allstate
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Mt. Eden Ky.
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Hemi valvetrain is heavy...gonna need more spring pressure than a wedge. I think the pushrods in my hemi might weigh more than the connecting rods, lol. I need to look at my notes (in the shop at home) to see where I set mine, but your exh stem clearance sounds really loose to me. I agree on the exhaust clearance. This is what I was told by Jeff @ Modern RIP ".001-.0014 on intake new .0016-.002 on exh new depends on application" .
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Re: 572, small steps forward
[Re: Hemi Allstate]
#2735633
01/22/20 04:01 PM
01/22/20 04:01 PM
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Joined: Jan 2003
Posts: 13,319 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,319
Marion, South Carolina [><]
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Hemi valvetrain is heavy...gonna need more spring pressure than a wedge. I think the pushrods in my hemi might weigh more than the connecting rods, lol. I need to look at my notes (in the shop at home) to see where I set mine, but your exh stem clearance sounds really loose to me. I agree on the exhaust clearance. This is what I was told by Jeff @ Modern RIP ".001-.0014 on intake new .0016-.002 on exh new depends on application" . Going from memory, I think .002" was the recommended max on the exhaust side. It's gonna wear em out anyway, lol. Hemis are hell on valveguides.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: 572, small steps forward
[Re: an8sec70cuda]
#2735635
01/22/20 04:04 PM
01/22/20 04:04 PM
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Joined: Jan 2003
Posts: 17,801 S.E. Michigan
ZIPPY
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Seemed kind of loose to me too.
I was actually more concerned about being too tight or wouldn't have looked.
I had a shop hone the guides in my rpm wedge heads, they were only like .0007 or .0008 when new.
Yeah I expect it's not going to be very nice to the guides anyway, not with that valvetrain.
Rich H.
Esse Quam Videri
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