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#61
08-02-2011, 01:34 AM
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Quote:
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Anybody else on this planet campaign a M/T hemi Pontiac for eleven seasons? ... or has built a record breaking DOHC hemi four cylinder Pontiac? ... or has driven a couple laps of Nuerburgring with Tri-Power Pontiac power?(back in 1967) |
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#62
08-02-2011, 02:50 AM
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bla bla bla, whats the point, theres only like 4 sets in the world. when someone makes a set that i can bolt on my car then we can talk beyond the angels on the head of a pin theory. wasted band width here
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#63
08-02-2011, 08:10 AM
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Lord willing we will be in Linders lot on Thursday. We have a few miles to make but we will be pushing to make it around mid afternoon.
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#64
08-02-2011, 09:42 AM
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Quote:
Perhaps continued discussion encourages a new run of heads with revisions to run easier to obtain valve train pieces and chamber options/port/valve sizes for large bore motors etc.. No one is going to manufacture or market anything there is no interest in, especially in this economy. If you have no discussion there is no interest, no interest, no product! |
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#65
08-02-2011, 10:53 AM
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Quote:
Eric |
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#66
08-02-2011, 11:29 AM
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hemi head
aint KRE makeing a version of the Hemi head now??? there you go you cant bolt a set on your motor...after forking out lots of $$$$$$$.
http://www.krepower.com/Pontiac%20Al...er%20Heads.htm Quote:
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#67
08-02-2011, 09:31 PM
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very cool, any thought of installing 8mm guides and using a 2" or larger LS based valve? From the looks of the valve seat area and SSR there is quite a bit on the table, I'd bet 315-320cfm intake and 280ex is achievable wo much trouble imo
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D.S.R.E. Your NW Pontiac Street/Strip Engine Builder, Specializing in Cylinder Head,Intake Manifold,and Exhaust Manifold Porting services and Building the Most Efficient stock rebuilds to Hi HP Pump Gas and Race Combinations for Pontiac,Buicks,Olds,FE Fords,385 Series and HP Gen 3 and 4 LS engines! 2006 silvy Z71 4X4,383 LS 600+hp NA Shared Toy-66 Lemans 470cid by me 537hp 580tq-manifolds, 570hp 590tq-2"headers,custom cam,rpm intake, mild e-heads, Looks stock ;-} |
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#68
08-02-2011, 10:58 PM
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Keith and I are now in Mo and should get to Linders on Thurs too. Looking forward to seeing you.
__________________
Hundreds of Pontiacs in Az "Real Pontiacs only..no corporate nonsense!" Facebook- Pontiac Heaven Hosting- 23rd annual Pontiac Heaven weekend- Phoenix pending due to covid Pontiac Heaven Museum in process Phil 2:11 |
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#69
08-23-2011, 02:14 PM
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Exhaust flow numbers from a few weeks ago...
As usual the pipe picked up a few numbers as did the larger bore diameter. |
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#70
08-31-2011, 12:36 AM
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Those flow numbers helped me out, thanks Jim. (Sending you a PM)
__________________
Anybody else on this planet campaign a M/T hemi Pontiac for eleven seasons? ... or has built a record breaking DOHC hemi four cylinder Pontiac? ... or has driven a couple laps of Nuerburgring with Tri-Power Pontiac power?(back in 1967) |
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#71
08-31-2011, 10:14 AM
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alittle modern knowhow should improve that number, if you want to run them again. just for the sake of numbers and for those interested and not meant to highjack... here are some numbers on some older (new generation) prostock style hemi heads on a 4.5 bore fixture. Radius inlet and no pipe on the exhaust. .200 137 119.5 .300 212.5 166.5 .400 282.8 211.3 .500 353.2 254 .600 423.5 288.1 .700 480.2 326.5 .800 514.1 345.7 .900 526.6 353.4 1 541.5 357.7 Last edited by J.C.you; 08-31-2011 at 10:42 AM. |
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#72
09-02-2011, 01:25 AM
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Just to fill ya' all in on the status of this effort:
We will not be investigating the potential flow of the M/T hemi ports. Jim has consented to helping me get the ports of this particular head to a point where it will be useful to me on a blown-alky four cylinder engine for my lakester. I'm confident that minor intake flow improvement will facilitate the four HP/c.i. that I want (725 HP from 182 c.i. @ not more than 10,000 RPM).
__________________
Anybody else on this planet campaign a M/T hemi Pontiac for eleven seasons? ... or has built a record breaking DOHC hemi four cylinder Pontiac? ... or has driven a couple laps of Nuerburgring with Tri-Power Pontiac power?(back in 1967) |
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#73
09-02-2011, 08:29 AM
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4 HP/ci is an excellent goal. This project should be both interesting and challenging.
Now if we could just convince Jack to use something beside 3/8 stem valves...I am working on him. :-) |
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#74
09-03-2011, 12:13 AM
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Well... I've talked myself into believing it can be done. Now if I can just talk a Roots blower into believing it's "happy" at around 15k RPM...
 [plus a couple hundred revs to compensate for those 3/8" stems]
__________________
Anybody else on this planet campaign a M/T hemi Pontiac for eleven seasons? ... or has built a record breaking DOHC hemi four cylinder Pontiac? ... or has driven a couple laps of Nuerburgring with Tri-Power Pontiac power?(back in 1967) |
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#75
09-03-2011, 10:37 AM
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Got any drawings of that OHC arrangement you want to post?
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#76
09-04-2011, 12:10 AM
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I'll eventually post some stuff. I need to dig out sketches that I started a few years ago, and continue to develop the details. The dual cams will use followers (roller?) with the anchors (adjusters) of both intake and exhaust all in-a-row along the center of the head.
__________________
Anybody else on this planet campaign a M/T hemi Pontiac for eleven seasons? ... or has built a record breaking DOHC hemi four cylinder Pontiac? ... or has driven a couple laps of Nuerburgring with Tri-Power Pontiac power?(back in 1967) |
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#77
09-14-2011, 01:10 AM
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Here's a working-paper cross-sectional view of my eventual DOHC setup for the M/T hemi heads. Note the "phantom" cam followers, with "invisible" bodies. My search for existing roller-element followers reached a dead-end, so I'll probably need to fab them from billet. Depending on how I restrain the rockers laterally, I might need to forego one of the rollers, either at the lobe or at the valve tip. Although I plan to use solid anchor/adjusters, a person could also utilize hydraulic anchors with this design.
The largest piece to fab is the 1 3/8" thick aluminum plate to bolt on top of the head. But the elevated rocker cover rail will mimic the original one, so that a normal old-hemi cover (M/T casting or whatever) can be used- with modification to let the cam snouts protrude out the front. Back when I originally thought about converting my hemi V8, I liked the fact that it would have pretty much retained its outward appearance- just with the rockers covers sitting 1 3/8" higher.
__________________
Anybody else on this planet campaign a M/T hemi Pontiac for eleven seasons? ... or has built a record breaking DOHC hemi four cylinder Pontiac? ... or has driven a couple laps of Nuerburgring with Tri-Power Pontiac power?(back in 1967) |
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#78
01-02-2012, 03:38 PM
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Bringing this back to the top to see if Jim or Jack have any updates. I have gotten renewed interest in running my heads and this is a great thread with some great info. No DOHC stuff for me though, I'll leave that to Jack.
Rob... Jack, PM sent......
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" Darksiders Rule "
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#79
01-02-2012, 04:35 PM
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Agree its some pretty cool stuff. I love innovation! Dare to be different certainly fits my tastes.
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#80
01-02-2012, 04:58 PM
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I am expecting to have the HEMI separate shaft rocker set up finished within a month or 2. Last month, I modified a head, removed the casting where the pushrods go through and opened up the area around there. Then, sent it off. They sent me back the original one I had sent them last week.
This should be a very nice, modern rocker arrangement for the M/T HEMI.
__________________
Hundreds of Pontiacs in Az "Real Pontiacs only..no corporate nonsense!" Facebook- Pontiac Heaven Hosting- 23rd annual Pontiac Heaven weekend- Phoenix pending due to covid Pontiac Heaven Museum in process Phil 2:11 |
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