cross ram
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Le Mans Master
Joined: Apr 2006
Posts: 5,403
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cross ram
Looking some more at my offenhauser low profile cross ram the center point of the carb pad height is 5 3/4 a little higher then a high rise dual plane performer rpm at 4.72. The runners are long roughly 8 inches. Makes sense for the smaller engines it was intended for. The bottom half of this intake looks like they copied chevys cross ram, the top plate is different.
Last edited by Little Mouse; Apr 14, 2012 at 05:13 PM.
Thread Starter
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Guess i'm just rambling. I bought the manifold around eight yrs ago when i was a lot more bucks up with the intention of using it on a light weight street rod. Classic industries reproduces the hard fuel lines, fuelblock, linkage to mount the carbs on it one facing forward one backwards just like the original 302 cross ram along with the aircleaner. Right now i'm trying to guess what size double pump carbs to use 600 or 650. At around $700.00 X 2 holley hp carbs are out. So its back to what i know the stuck in the 60s less expensive double pumpers.
Last edited by Little Mouse; Apr 16, 2012 at 04:27 PM.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
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From: Oxford MA-----You just lost the game!!!!
Man, if I had a manifold like that, I know exactly what I would do: two Holley 390 vacuum secondaries. Connect the two vacuum diaphragm covers so the secondaries would be synchronized. I have no idea how, or even if, it would work, but that's what I would try!
Keep the shiny side up!
Scott
Keep the shiny side up!
Scott
Thread Starter
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Man, if I had a manifold like that, I know exactly what I would do: two Holley 390 vacuum secondaries. Connect the two vacuum diaphragm covers so the secondaries would be synchronized. I have no idea how, or even if, it would work, but that's what I would try!
Keep the shiny side up!
Scott
Keep the shiny side up!
Scott
Anything i would be interested in cam wise would fall on its face below
4000/4500 rpm. I'm leaning torward the 650s.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
People do that on street tunnel rams, very mild cam, auto trans no need for even a higher stall converter. Will see them set up like that on t-buckets.
Anything i would be interested in cam wise would fall on its face below
4000/4500 rpm. I'm leaning torward the 650s.
Anything i would be interested in cam wise would fall on its face below
4000/4500 rpm. I'm leaning torward the 650s.
Keep the shiny side up!
Scott
Thread Starter
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Is there much of a difference between a tunnel ram and a cross ram, beside the cross ram being able to fit under the hood? Tunnel ram manifolds usually have a common plenum for both carbs, like a big single plain manifold, don't they? Does the cross ram have the two carbs separated, kinda like a dual plane? Do you really think you could fit the whole thing under a 'vette hood? That would be pretty damn cool looking!
Keep the shiny side up!
Scott
Keep the shiny side up!
Scott
Last edited by Little Mouse; Apr 16, 2012 at 08:58 PM.
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Melting Slicks
Joined: Sep 2003
Posts: 2,114
Likes: 33
From: ct
This ran great on a very stong 355. I have custom built 660 Holleys on it. It just fit under the Motion hood. I blew the motor up last year so now it's all coming out and I'm putting in an LS motor.
No pics of this setup all done.
No pics of this setup all done.
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
Those carbs are 585cfm Holleys I used a set of those on a 302 Xram intake back in the 80s. I still have a set I was building for another Xram set up. $750 for the pair because I spent a lot of time fitting the cam drive secondary linkage onto them.
I'm WRONG! Those are #6224 center squirter 660cfm carbs. The same ones Bill Jenkins used (with lots of mods) to win NHRA Pro Stock championship. Best tunnel rams carbs ever for SB Chevy.
I'm WRONG! Those are #6224 center squirter 660cfm carbs. The same ones Bill Jenkins used (with lots of mods) to win NHRA Pro Stock championship. Best tunnel rams carbs ever for SB Chevy.
Last edited by Solid LT1; Apr 17, 2012 at 05:05 PM.
Thread Starter
Le Mans Master
Joined: Apr 2006
Posts: 5,403
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looking at that throttle arm that looks like a 4224 model center squirter. Looks like some bending has been done to the slot.
Last edited by Little Mouse; Apr 17, 2012 at 06:00 PM.
Le Mans Master
Joined: Jan 2006
Posts: 6,503
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From: Butler Pa
Thread Starter
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
That ten degree stuff then all eight opening probably not working that great on the ole street car so it looks like some carving or bending went on lol.
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
Thread Starter
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Right now i'm looking at throttle arms on the side of the cheaper 4776 DP to see if theres a place to attach the rod on the lower end of the arm. It also must have the throttle cable pull on the lower arm of the back carb.
LT1 you have a picture of one of your set ups ?
I'm going to have someone tig weld some aluminum over the top edge of the runners at the flange so i can run a bigger head. That will probably warp it ill have to then flatten it out. Theres not really enough aluminum for the height of a 1206 gasket.
LT1 you have a picture of one of your set ups ?
I'm going to have someone tig weld some aluminum over the top edge of the runners at the flange so i can run a bigger head. That will probably warp it ill have to then flatten it out. Theres not really enough aluminum for the height of a 1206 gasket.
Last edited by Little Mouse; Apr 18, 2012 at 05:44 PM.
