Author Topic: Crossram, was there ever a single carb adapter plate?  (Read 8166 times)

KurtS

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Re: Crossram, was there ever a single carb adapter plate?
« Reply #15 on: March 08, 2023, 11:01:10 PM »
He added the hood, it is not original.
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Charley

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Re: Crossram, was there ever a single carb adapter plate?
« Reply #17 on: March 09, 2023, 06:34:58 PM »
I see now I wasn't clear. Warren collected the rarest of the rare when it came to 69 Camaro parts. When he became ill Chris White helped him get the car back up and running after he had parked it in the 80's. He added some of the rare parts like that hood, air cleaner, adapter plate, prop rod etc.
« Last Edit: March 09, 2023, 06:49:14 PM by william »

David K

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Re: Crossram, was there ever a single carb adapter plate?
« Reply #18 on: March 12, 2023, 02:29:17 AM »
Thanks Kurt.

bcmiller

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Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
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WaltZ

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Re: Crossram, was there ever a single carb adapter plate?
« Reply #20 on: March 13, 2023, 03:05:30 PM »
my Question was "is there or was there ever a single carb adapter for the winters crossram?", but I may not have been clear enough.
I'd like to know it there was a single carb adapter plate to fit on the the winters crossram to change over from duals to a single.
Just Curious :)

william

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Re: Crossram, was there ever a single carb adapter plate?
« Reply #21 on: March 13, 2023, 03:44:00 PM »
There was no single-carb adapter. The purpose of the cross-ram was to increase [1,200 cfm] fuel-flow over the production 780 cfm carb. There is no reason to believe Chevrolet Engineering even considered it; the SB hemi-head was a clear failure but is listed in the SCCA/FIA homologation documents. A single-carb adapter is not.
Learning more and more about less and less...

crossboss

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Re: Crossram, was there ever a single carb adapter plate?
« Reply #22 on: March 14, 2023, 04:13:29 PM »
There was no single-carb adapter. The purpose of the cross-ram was to increase [1,200 cfm] fuel-flow over the production 780 cfm carb. There is no reason to believe Chevrolet Engineering even considered it; the SB hemi-head was a clear failure but is listed in the SCCA/FIA homologation documents. A single-carb adapter is not.



That is correct. For 1970, a single 4V carb was 'required' for SCCA Trans Am racing. So, as I believe Chevrolet went back to a single four intake. I'm sure Jon (and others) will chime in to educate us what exact intake was used for 1970. As a side note, the Brand X models had the options of either a 4V, or an 8V tops for competition use.
Just another T/A fanatic. Current lifelong projects:
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WaltZ

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Re: Crossram, was there ever a single carb adapter plate?
« Reply #23 on: March 14, 2023, 06:33:12 PM »
would an Offenhauser #5901 single quad top fit and work on a Winters Cross Ram base

MO

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Re: Crossram, was there ever a single carb adapter plate?
« Reply #24 on: March 15, 2023, 04:57:30 AM »
Man, I imagine only someone that tried that would know. Is the bolt pattern similar at all? Next question: why? If you have a crossram, why would you want to run 1x4 on that manifold? Why not just install a single 4bbl manifold that will work properly?

WaltZ

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Re: Crossram, was there ever a single carb adapter plate?
« Reply #25 on: March 15, 2023, 01:48:10 PM »
just thinking outside the box, just curious

crossboss

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Re: Crossram, was there ever a single carb adapter plate?
« Reply #26 on: March 15, 2023, 04:05:15 PM »
would an Offenhauser #5901 single quad top fit and work on a Winters Cross Ram base



You could just fabricate your own alum top. Very simple to do. OR, you can have a machine shop make one up for you. That said, it might be easier and cheaper to purchase an aftermarket single 4V version like an Offy, or Smokey Ram intake instead.
Just another T/A fanatic. Current lifelong projects:
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1969 Mustang Fastback w a Can-Am 494 (Boss 429)

z28z11

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Re: Crossram, was there ever a single carb adapter plate?
« Reply #27 on: March 17, 2023, 02:14:49 AM »
Man, I imagine only someone that tried that would know. Is the bolt pattern similar at all? Next question: why? If you have a crossram, why would you want to run 1x4 on that manifold? Why not just install a single 4bbl manifold that will work properly?

The manifold tops are very close, the largest difference being the Offenhauser bolts are 1/4", the Winters intake top is drilled for 5/16" bolts. I still have a couple of Offenhauser gaskets to check with, but unfortunately no Winters to match them up with (sold all of my Offenhausers, had two single four tops at one point in time). That would be the easiest way to check -

Regards,
Steve
1968 Z28 M21/U17 BRG/W 1967 Chevy ll Nova SS 
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1969 L78 X66/N66 Cortez/BVT
1969 Z11 L48/M35/C60/C06  1949 3100 5wd 235/6

bcmiller

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Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

169INDY

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Re: Crossram, was there ever a single carb adapter plate?
« Reply #29 on: March 20, 2023, 11:24:02 PM »
^Correct, the conversation shifted to the Hood. & the Book contains Nothing related to a ALum single 4BBL lid for the Xram lower intake.
Jim
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