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HP with Indy ez325 cnc heads #2076374 05/19/16 10:34 AM 05/19/16 10:34 AM
Joined: Aug 2011 Posts: 188 Middletown, Ohio J Joes66dart OP member
Joes66dart OP member J Joined: Aug 2011 Posts: 188 Middletown, Ohio	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. Last edited by Joes66dart; 05/19/16 11:04 AM.

Re: HP with Indy ez325 cnc heads [Re: Joes66dart] #2076404 05/19/16 11:41 AM 05/19/16 11:41 AM
Joined: Nov 2003 Posts: 1,838 NW Indiana F fbs63 top fuel
fbs63 top fuel F Joined: Nov 2003 Posts: 1,838 NW Indiana	You have correct flow#s on the heads or just what Indy is advertising? Also what is the duration @ .050 on the cam?

Re: HP with Indy ez325 cnc heads [Re: Joes66dart] #2076411 05/19/16 11:50 AM 05/19/16 11:50 AM
Joined: Aug 2011 Posts: 188 Middletown, Ohio J Joes66dart OP member
Joes66dart OP member J Joined: Aug 2011 Posts: 188 Middletown, Ohio	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. Last edited by Joes66dart; 05/19/16 11:52 AM.

Re: HP with Indy ez325 cnc heads [Re: Joes66dart] #2076429 05/19/16 12:24 PM 05/19/16 12:24 PM
Joined: Jan 2003 Posts: 5,484 SoCal Brian Hafliger master
Brian Hafliger master Joined: Jan 2003 Posts: 5,484 SoCal	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/ Last edited by ou812; 05/19/16 12:24 PM. Brian Hafliger

Re: HP with Indy ez325 cnc heads [Re: Joes66dart] #2076435 05/19/16 12:43 PM 05/19/16 12:43 PM
Joined: Oct 2011 Posts: 326 Alberta Wookie316 enthusiast
Wookie316 enthusiast Joined: Oct 2011 Posts: 326 Alberta	13.7-1 CR. 1000 CFM 4150. Indy EZ-1 with a 2.25 intake valve. Flow around 360 @ .600 1971 Plum Crazy Super Bee. 572 World Aluminum block with a Cope 727 & Dana 4.10 out back. 9.88 @ 138 with a 1.35 60 NA. Dialed back to 10.0’s. 4000 lbs with me in it.

Re: HP with Indy ez325 cnc heads [Re: Joes66dart] #2076442 05/19/16 12:52 PM 05/19/16 12:52 PM
Joined: Jan 2003 Posts: 31,000 Oregon A AndyF I Win
AndyF I Win A Joined: Jan 2003 Posts: 31,000 Oregon	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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