Moparts

Critique this combo please....

Posted By: dakotahotrodder

Critique this combo please.... - 01/02/09 06:38 PM

What do you think about this combo for my bracket car? 440 block, bored .030 w/ BCR aluminum main caps & zero decked, Muscle Motors stroker kit with 4.250 crank, flat top pistons. I would re-use my existing 78 cc cnc ported e-heads that flow 307 @ .600, existing Indy SR rockers, existing M1 intake and Bigs 950 carb. I have a Lunati solid roller cam with .648 lift 270/276 duration @ .050, 108 lsa. Compression ratio should be in the 12.3:1 range. The heads and intake have the std. intake window, not MW. What kind of power do you think this would make, and how more with EZ heads and a dominator? Thanks, Wade
Posted By: rebel

Re: Critique this combo please.... - 01/02/09 08:22 PM

personally i think you need bigger holes in the heads to match that cam. it'll run like an asthmatic.
Posted By: B3422W5

Re: Critique this combo please.... - 01/02/09 08:26 PM

Quote:

personally i think you need bigger holes in the heads to match that cam. it'll run like an asthmatic.



I dont know..i have w5 heads in 422 inches that probably arent any bigger/better than those heads, and an even bigger cam 273-280 and my car runs fine.

That combo he has should make 600-620 ponies easy, and get pretty much anything in the 10's and a light car in the 9's.

Sounds like a torky mild rpm combo.
Posted By: Triple Threat

Re: Critique this combo please.... - 01/02/09 09:49 PM

Quote:

Quote:

personally i think you need bigger holes in the heads to match that cam. it'll run like an asthmatic.



I dont know..i have w5 heads in 422 inches that probably arent any bigger/better than those heads, and an even bigger cam 273-280 and my car runs fine.

That combo he has should make 600-620 ponies easy, and get pretty much anything in the 10's and a light car in the 9's.




Don, Your car has 80 less cubes that this motor will though.

The car will run out of steam up top with that little head on a big motor. Its will work but you would see benefits from going to the larger head as you already know.

If it were me I would run it with the heads you already have now. If your not happy with how it runs then you can step up to something else.
Posted By: dakotahotrodder

Re: Critique this combo please.... - 01/03/09 01:26 AM

I know it would be better with Indy heads and a dominator, but I'm trying to get some real world input as to what something like this should make for power. Again, if I can swing this it must be with some of the parts that I have, and like mentioned, I can add the heads later.
Posted By: 440W8 Duster

Re: Critique this combo please.... - 01/03/09 05:12 AM

Wade the motor won't make any more power than you have now but might make more TQ.The heads are the limiting factor.Try to find some -1 heads later and you'll see that thing come to life.

Attached picture 4919503-106-0671_IMG.JPG
Posted By: Bob_Coomer

Re: Critique this combo please.... - 01/03/09 05:20 AM


JMO
Sounds good it will still be a torqee motor though. I wouldnt over gear it, or put too much converter in it. I will say even with those ported heads it probably wont want too RPM very high.
Posted By: Cab_Burge

Re: Critique this combo please.... - 01/03/09 06:12 AM

Quote:

What do you think about this combo for my bracket car? 440 block, bored .030 w/ BCR aluminum main caps & zero decked, Muscle Motors stroker kit with 4.250 crank, flat top pistons. I would re-use my existing 78 cc cnc ported e-heads that flow 307 @ .600, existing Indy SR rockers, existing M1 intake and Bigs 950 carb. I have a Lunati solid roller cam with .648 lift 270/276 duration @ .050, 108 lsa. Compression ratio should be in the 12.3:1 range. The heads and intake have the std. intake window, not MW. What kind of power do you think this would make, and how more with EZ heads and a dominator? Thanks, Wade

I have a low deck motor that was very simialr to yours as far as the C.I and heads, my cam is smaller, 260@.050 intake and 266@.050 exh solid roller, and my compression was less, 9.25 to 1. My intake and carbs are Eddy low deck six pak intake and stock Holley vacume six pak carbs, the motor made peak HP at 5600 rpm and peak torque at 4500 rpm with that combination, in the car the motor pulls real hard to 7500 rpm I am scared to find out where the motor quits pulling hard so I shift it between 7000 to 7300 RPM As far as how much power the motor will make with the M1 and 950 carb. I would guesss around 650 to 700 hp depending on the tune up and weather, very similar torque. As far as how much gain with the EZ heads and bigger carb it depends on which intake and port size?
Posted By: Defbob

Re: Critique this combo please.... - 01/03/09 02:13 PM

The motor in the convertible makes 585 horsepower.
.055 over
4.25" stroker, 511ci
10.85:1
Modern CNC E-heads, 320cfm @ 600
TM7 with 830DP
.604", 260@.050, 110 lobe sep, Solid tappet
isky iron rockers, old wide base ones
Posted By: Defbob

Re: Critique this combo please.... - 01/03/09 02:25 PM

my estimate is based off or rwhp and calculated to find crank hp.

475rwhp from the mph and weight
© 2024 Moparts Forums