I knew the cross ram would cost me big power. I have the cross ram, linkage and bolts already so I will use it. I would like to try a single setup just to see the difference. What intake would you suggest? It is a 440 base 505 with ez heads by porter racing and a solid roller cam 264/270 dur @50 110 lobe sep and .631 lift. Thanks Mike

I run a heavily ported Victor 383 w/an adapter that`s blended nicely into the manifold and a Thumperized HP-1050.............

As mentioned Dan Dvorak is the man on a cross ram. I run the earlier Federal Mogul AFB carbs, they have a few minor differences. My 3200 lb NSS car ran a best of a 10.00 with the old cross ram, I could never get it faster, and Dvorak said that I was wasting my time trying. Two other guys in NSS are at the same ET and nothing seems to make the cars go any faster. Put a homade inline manifold with same carbs on mine and it ran 9.78, When setting up your fuel system the needles and seats are the main restriction, I machined little windows in the seats and drilled the air horn to make them dual inlet. Really improved the stability of the airfuel readings.

As long as your heads have the stock Max Wedge size or ports look at the Indy single four intakes, 440-2 for the RB with 4150 carbs and the 440-3 for the dominator carbs, 400-2 and 400-3 for the low decks. I don't know of anyone testing the new Edlbrock Super Victor 440 M.W. intakes yet, they may be a decent choice also

How much ET are we talking about the 100hp loss with the factory crossram? I can run 10.20's thru the mufflers with these small
air cleaners on. Curious how quick I could go with a single plane and dominator.

Probably pick up to 9.80 or 9.90 if you added 100 hp. I'm assuming that you currently weigh about 3600 lbs?

The problem is that then you are just another guy with an Indy intake and a Dominator. Having a cross ram looks cool even if it costs a bunch of hp.

9:70's in 3300 lb. in. Nss car stock xram 750 edies.

Originally Posted By Smoparmike

I knew the cross ram would cost me big power. I have the cross ram, linkage and bolts already so I will use it. I would like to try a single setup just to see the difference. What intake would you suggest? It is a 440 base 505 with ez heads by porter racing and a solid roller cam 264/270 dur @50 110 lobe sep and .631 lift. Thanks Mike

duration is wrong for a cross ram engine that will work with a short runner single plain intake. cross ram should be the other way around. 270 intake 266 exhaust

not disagreeing with you but the most we have ever seen on a dyno (stock eliminator engines) going from a cross ram to a single 4 is 45 hp that with changing cam shaft.

Sounds very reasonable for a stock eliminator engine. The engine where I saw 100 hp increase was 505 inches with Indy heads. The stock intake was very restrictive at 505 inches so the flow increase bigger when we switched to 4500 intake. The OP in this thread has a 505 inch engine so that is why I was using that number.

My motor is 499ci , little Ez 295 cnc w/2.25 intakes, small comp roller .620/.620 272/276@.050. 750 eddy's done by Dvorak . 5400 ati converter w/ 4.30 gears. Launch at 2200 shift at 6200. Weighs 3500lbs w driver.

The engine I was working with was fairly similar to what you have. It was 505 inches and 13:1 compression. It made 620 hp with the cross ram, 705 with the Indy X ram box intake and 740 with a 440-2 intake and a Dominator carb. I think we changed cams in there too. I was using a cam that is a little bigger than what you have. Here is a link to one of the articles. The MW article is also in the tech archives:

http://www.hotrod.com/how-to/engine/mopp-0709-cam-carburetor-modifications/

I'll just throw this out as an untested counterpoint to the 100hp loss from the factory x-ram.
I dynoed a 12:1 RB499, ported Indy -1's, .650 lift roller, 2-2 1/8 headers, OE stage II manifold, FM carter 750's.
It made 675hp like that. I didn't test any other manifolds on it, but I just don't think there was another 100hp to be had out of that motor by installing a 440-3 and a dominator.
I suppose it might have made 775hp, but I know I've built "better" motors than that before that didn't get there.