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Indy 440-2 to 64 crossram hp difference?

Posted By: biff426

Indy 440-2 to 64 crossram hp difference? - 08/20/09 01:53 AM

What do you guys think I have a .060 440 3.75 stroke indy sr cnc from indy heads .620 flat tappet straightline cam 12.5:1 and indy 440-2 intake with a 950 4150 style carb motor went 10.0s at 3300lbs what do you think of a swap to a '64 max wedge 426 cross ram I think it will slow down what do you all think has anyone done any testing with these two intakes? Andy?
Posted By: Kevins493

Re: Indy 440-2 to 64 crossram hp difference? - 08/20/09 02:14 AM

I have a 493, 12.5-1, Indy 440-1's, don't know what they flow.. 278/284, .690/.690 roller, with a '63 cross ram (casting date is 12/27/62) in a 3200lb car.. It runs 10.30's on a decent day. It will kill a lot of hp.
But it looks really cool.
Posted By: Anonymous

Re: Indy 440-2 to 64 crossram hp difference? - 08/20/09 02:48 AM

your going to definitely lose 80 hp.
i picked up 80 hp from a oe maxwedge crosram, to a 440-25 offset crossram.
i thinking a loss of .3 in the 1/4 mile.
i went from this

Attached picture 5428646-63PLYMOUTH65DODGEA99068HEMIROADRUNNER029.JPG
Posted By: Anonymous

Re: Indy 440-2 to 64 crossram hp difference? - 08/20/09 02:51 AM

to this.went froma 10.23 on a sealevel altitude in the spring to 10.14 on a 99 degree hot summer day with 4000 ft altitude.
it looks like with the proper jetting in the fall i'll be right at 10.00 to 9.95 with the 440-25.
heres the new intake setup.

Attached picture 5428657-Indyintake63plymouth004.JPG
Posted By: biff426

Re: Indy 440-2 to 64 crossram hp difference? - 08/20/09 02:52 AM

Quote:

your going to definitely lose 80 hp.
i picked up 80 hp from a oe maxwedge crosram, to a 440-25 offset crossram.
i thinking a loss of .3 in the 1/4 mile.
i went from this



Did you have any hood clearence issues with the 440-25 looks a good bit taller??
Posted By: Anonymous

Re: Indy 440-2 to 64 crossram hp difference? - 08/20/09 02:59 AM

Quote:

Quote:

your going to definitely lose 80 hp.
i picked up 80 hp from a oe maxwedge crosram, to a 440-25 offset crossram.
i thinking a loss of .3 in the 1/4 mile.
i went from this



Did you have any hood clearence issues with the 440-25 looks a good bit taller??



just lost the velocity stacks, same as on my 65 dodge, i think the velocity stacks helped alot sealing the carbs to the hood.

Attached picture 5428673-HEMIREUNION69HEMIRR65DODGECORONET1265.JPG
Posted By: biff426

Re: Indy 440-2 to 64 crossram hp difference? - 08/20/09 03:11 AM

Looks like I need a deal on an intake lol
Posted By: AndyF

Re: Indy 440-2 to 64 crossram hp difference? - 08/20/09 03:18 AM

On my 505 engine the factory style crossram cost about 100 hp when compared to an Indy single plane intake. The more power you're making the more the crossram will kill.

Towards the end of my development program I was making over 800 hp with that same 505 using an unported Edelbrock Super Victor intake. I didn't swap back to a cross ram at that point but I'm pretty sure the power would've dropped more than 100 hp if I had.

Here is one article on that engine, there are several more in the tech archives.

http://www.compcams.com/Community/Articles/Details.asp?ID=-1730768356
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