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INDY 440-1 CNC porting options? #2833669
10/16/20 09:10 PM
10/16/20 09:10 PM
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WNY
Moparrob68 Offline OP
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Have been running an out of the box set of 440-1 heads on a 13 to 1 compression 440 for the last 4 years and the combination is maxed out. Was thinking about sending them back to INDY for their 325-CNC porting and a good valve job.Is that a good plan or should I look at other options?

Re: INDY 440-1 CNC porting options? [Re: Moparrob68] #2833685
10/16/20 09:47 PM
10/16/20 09:47 PM
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Cab_Burge Offline
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Call Bob at Modern cylinder heads at 568-468-7914 and talk to him about doing the CNC porting on those 440-1 heads like he does for a lot of the big name Mopar engine builders, maybe even for Indy before they got sold to the new owners.
I've had them do, CNC port and valve job afterwards, several sets of heads including Brodix B1-BS , Eddy RPM ,Indy SR and Indy 440-1 with good results up
Ask him about changing the intake valves to the 2.250 also at the same time up


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: INDY 440-1 CNC porting options? [Re: Moparrob68] #2833686
10/16/20 09:49 PM
10/16/20 09:49 PM
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Originally Posted by Moparrob68
Have been running an out of the box set of 440-1 heads on a 13 to 1 compression 440 for the last 4 years and the combination is maxed out. Was thinking about sending them back to INDY for their 325-CNC porting and a good valve job.Is that a good plan or should I look at other options?


Talk it over with Dwayne at Porter Racing Heads. I'm not so sure that you can send them to Indy for the CNC porting since the castings might have changed over time. Dwayne would know the scoop on that. Dwayne can port them for you and/or provide you with some options.

Re: INDY 440-1 CNC porting options? [Re: AndyF] #2833714
10/16/20 11:22 PM
10/16/20 11:22 PM
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jwb123 Offline
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I am a poor country boy, and I can not afford CNC porting, but I do have a Harbor Freight die grinder, BUT one question I have asked and very few reply to is, WHO did the porting your CNC operations is duplicating? I have a homemade flow bench, and I can hand port most sets close to the CFM of a CNC head, but my heads have more velocity and seem to make a littler more power on the track and dyno. CNC stuff looks real pretty, but just to start a thread, how many people who are selling programs, tell who did the original work that is being copied?

Re: INDY 440-1 CNC porting options? [Re: jwb123] #2833731
10/17/20 02:47 AM
10/17/20 02:47 AM
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Talk to Todd @ Marsh Motorsport. He had Larry port mine to 390@800, thats way better than any CNC program I've seen.

Re: INDY 440-1 CNC porting options? [Re: jwb123] #2833756
10/17/20 07:17 AM
10/17/20 07:17 AM
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dvw Offline
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Originally Posted by jwb123
I am a poor country boy, and I can not afford CNC porting, but I do have a Harbor Freight die grinder, BUT one question I have asked and very few reply to is, WHO did the porting your CNC operations is duplicating? I have a homemade flow bench, and I can hand port most sets close to the CFM of a CNC head, but my heads have more velocity and seem to make a littler more power on the track and dyno. CNC stuff looks real pretty, but just to start a thread, how many people who are selling programs, tell who did the original work that is being copied?

Mine are a 10+ years old. Hand ported by the late Jeff Kobylski at Modern Cylinder Head before they had CNC. Car has been 150@3350#. They work pretty good.
Doug

Re: INDY 440-1 CNC porting options? [Re: dvw] #2835444
10/21/20 06:56 AM
10/21/20 06:56 AM
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n20mstr Offline
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Originally Posted by dvw
Originally Posted by jwb123
I am a poor country boy, and I can not afford CNC porting, but I do have a Harbor Freight die grinder, BUT one question I have asked and very few reply to is, WHO did the porting your CNC operations is duplicating? I have a homemade flow bench, and I can hand port most sets close to the CFM of a CNC head, but my heads have more velocity and seem to make a littler more power on the track and dyno. CNC stuff looks real pretty, but just to start a thread, how many people who are selling programs, tell who did the original work that is being copied?

Mine are a 10+ years old. Hand ported by the late Jeff Kobylski at Modern Cylinder Head before they had CNC. Car has been 150@3350#. They work pretty good.
Doug


Another vote for Modern, they CNC mine and they have been over 400 with a 4.5 fixture.


....BAD A$$ STREET CAR.....
Re: INDY 440-1 CNC porting options? [Re: n20mstr] #2835491
10/21/20 09:11 AM
10/21/20 09:11 AM
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carnut68 Offline
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Why not Dwayne Porter? He'd get my vote. Even though they'd be hand ported.

Re: INDY 440-1 CNC porting options? [Re: carnut68] #2835571
10/21/20 11:13 AM
10/21/20 11:13 AM
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451Guy Offline
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My Vote is Dwayne also. I had my SR's done by Modern prior to working with Dwayne. They worked good but cracked underneath the intake springs . Not their issue. I had machined the spring pockets lower to get correct installed height. Their program was for a set of heads that had not been touched. Dwayne will continue to get my stuff until he decides to fire me as a customer!!!! LOL.


Thanx 451 Guy

512 cu in 71 Demon Super Street Car
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512 cu in 69 Charger R/T
Best ET 11.39 @ 118.11

Re: INDY 440-1 CNC porting options? [Re: 451Guy] #2835714
10/21/20 03:42 PM
10/21/20 03:42 PM
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Dwayne’s head work is second to none. Big blockheads are his bread and butter.


Jim F

Re: INDY 440-1 CNC porting options? [Re: JCFcuda] #2835729
10/21/20 04:09 PM
10/21/20 04:09 PM
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drifter Offline
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Bob at Modern doesn’t answer the phone or return messages must not need the average Joes money

Re: INDY 440-1 CNC porting options? [Re: drifter] #2835760
10/21/20 05:31 PM
10/21/20 05:31 PM
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Sammy Offline
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Larry Smith out of North Carolina really is the go to guy. Just ask Sasquatch on the board.
Good turn around time and his flow numbers of 440-1s are great.

Re: INDY 440-1 CNC porting options? [Re: carnut68] #2835785
10/21/20 06:04 PM
10/21/20 06:04 PM
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Originally Posted by carnut68
Why not Dwayne Porter? He'd get my vote. Even though they'd be hand ported.

I called him about porting some heads for me years ago, he sent me to Jeff at MCH for their CNC porting work
Thanks Dwayne up bow


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: INDY 440-1 CNC porting options? [Re: drifter] #2835955
10/22/20 06:34 AM
10/22/20 06:34 AM
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n20mstr Offline
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Originally Posted by drifter
Bob at Modern doesn’t answer the phone or return messages must not need the average Joes money


YES that is an issue there some times.... However this is the only place that i have experience with. But i dealt with Scott Brown, not Modern direct.


....BAD A$$ STREET CAR.....
Re: INDY 440-1 CNC porting options? [Re: n20mstr] #2836282
10/22/20 08:11 PM
10/22/20 08:11 PM
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Moparrob68 Offline OP
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Has anyone use KG Engines in Ohio for their CNC programs? I talked to the owner Dave at Monster Mopar Weekend a few years ago and he said he does a lot of Mopar heads and he has a program for the 440-1heads.







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