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HP with Indy ez325 cnc heads

Posted By: Joes66dart

HP with Indy ez325 cnc heads - 05/19/16 02:34 PM

I'm building a new 520 low deck with indy ez325 cnc heads. I'm just wondering what kind of HP numbers guys are getting out of these heads. Here is a little info on my combo just in case anyone is wondering.

400 low deck 4.350 bore
4.375 K1 crank
6.535 BBC K1 rods
Je custom piston with .043 rings gap less top and Napier second. Low tension oil ring
.041 quench right at 13 to 1 comp.
Indy 400-3 intake
1250 pro systems dominator on e85
Comp custom grind .702 lift cam.
Bob weight is right at 2100 grams
We run a vacuum pump.
Posted By: fbs63

Re: HP with Indy ez325 cnc heads - 05/19/16 03:41 PM

You have correct flow#s on the heads or just what Indy is advertising? Also what is the duration @ .050 on the cam?
Posted By: Joes66dart

Re: HP with Indy ez325 cnc heads - 05/19/16 03:50 PM

The heads flowed 375 and 218 @.700. They were flowed at spires speed shop. I'm having some work done on the exhaust port before they get bolted on. They should pick up quite a bit on the exhaust side when they are done. I will have to dig out the cam card for the duration.
Posted By: Brian Hafliger

Re: HP with Indy ez325 cnc heads - 05/19/16 04:24 PM

Originally Posted By Joes66dart
I'm building a new 520 low deck with indy ez325 cnc heads. I'm just wondering what kind of HP numbers guys are getting out of these heads. Here is a little info on my combo just in case anyone is wondering.

400 low deck 4.350 bore
4.375 K1 crank
6.535 BBC K1 rods
Je custom piston with .043 rings gap less top and Napier second. Low tension oil ring
.041 quench right at 13 to 1 comp.
Indy 400-3 intake
1250 pro systems dominator on e85
Comp custom grind .702 lift cam.
Bob weight is right at 2100 grams
We run a vacuum pump.


We've made right at 750HP with a pump gas 540.

http://www.hotrod.com/cars/featured/1405-horsepower-540ci-dodge/
Posted By: Wookie316

Re: HP with Indy ez325 cnc heads - 05/19/16 04:43 PM



13.7-1 CR. 1000 CFM 4150. Indy EZ-1 with a 2.25 intake valve. Flow around 360 @ .600
Posted By: AndyF

Re: HP with Indy ez325 cnc heads - 05/19/16 04:52 PM

You can get 700, 800 or 900 hp out of those heads. Just depends what parts you put around them.

Your motor sounds like maybe 750 to 800 hp with 13:1 compression and a modest cam. I didn't start to make serious power with my EZ heads until we converted them over to Jesel rocker arms. Once we had the high ratio Jesel arms and we cranked the compression up to 15:1 the engine came alive.
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