Re: Opinions on cylinder head selection
[Re: GregY]
#980644
04/25/11 09:20 PM
04/25/11 09:20 PM
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Joined: Aug 2005
Posts: 4,799 ILL
MLR426
master
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master
Joined: Aug 2005
Posts: 4,799
ILL
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Do a set of 906 heads, the 346 head is terrible. You will still have to have those Indy heads prepped with a better valve job,runner,valve pocket and port clean up. Then you can think about cam, compression, intake, carb etc. The 71 charger is a heavy car, your going to need more gear also too get that car moving. This project can quickly turn into a money monger, cylinder heads are an important part of making the power you need to run hard, add everything up before jumping in head first. Your budget build can quickly get out of hand to support the time you expect to run.
logan426
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Re: Opinions on cylinder head selection
[Re: GregY]
#980645
04/25/11 09:43 PM
04/25/11 09:43 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Muscle Motors' Steve Dulcich (whose forgotten more info than I know) states that the later heads 452's etc are far easier for the home porter to improve on as opposed to the earlier 906/915 though 452's would need to b thoroughly crack checked & I would get the MP templates & port em (lot of gain/not too much work). Might go to MM archives & read his articles. Been a few reported probs w Indy's stuff but prob no more than the norm (& maybe even less) than any rebuilder as you (most of the time) only get the bad news on stuff here. I ran a set (SB's) of their rebuilt ones & no issues. Iron heads need alot replaced/reworked to get em right but as you said alum ones are $$$ plus need to b checked over after you buy them. Myself in your case w a mild 440 I'd do a bare bones rebuild on your 346's & save for a good set later. dont remem if 346's had hardened seats as they were close to the changeover on that & we know how Ma was on supposed published changeover years
live every 24 hour block of time like it's your last day on earth
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Re: Opinions on cylinder head selection
[Re: RapidRobert]
#980646
04/25/11 09:51 PM
04/25/11 09:51 PM
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Joined: Nov 2004
Posts: 843 Suffolk,VA
ireland383
super stock
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super stock
Joined: Nov 2004
Posts: 843
Suffolk,VA
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Quote:
Muscle Motors' Steve Dulcich (whose forgotten more info than I know) states that the later heads 452's etc are far easier for the home porter to improve on as opposed to the earlier 906/915 though 452's would need to b thoroughly crack checked & I would get the MP templates & port em (lot of gain/not too much work). Might go to MM archives & read his articles. Been a few reported probs w Indy's stuff but prob no more than the norm (& maybe even less) than any rebuilder as you (most of the time) only get the bad news on stuff here. I ran a set (SB's) of their rebuilt ones & no issues. Iron heads need alot replaced/reworked to get em right but as you said alum ones are $$$ plus need to b checked over after you buy them. Myself in your case w a mild 440 I'd do a bare bones rebuild on your 346's & save for a good set later. dont remem if 346's had hardened seats as they were close to the changeover on that & we know how Ma was on supposed published changeover years
My 346's had hardened seats. There was a test on iron heads 906,346,452 and they all flowed pretty much the same. I had my 346's done and to be honest for not much more I got the Stealths. They flow a he!! of a lot better than the irons.
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Re: Opinions on cylinder head selection
[Re: JohnRR]
#980650
04/26/11 08:30 PM
04/26/11 08:30 PM
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Joined: Jan 2003
Posts: 1,210 Rochester, New York
GregY
OP
pro stock
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OP
pro stock
Joined: Jan 2003
Posts: 1,210
Rochester, New York
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Quote:
The 346 has the same basic intake port as the 452 , flat floor with no short turn.
Greg you are in Rochester NY, contact Dwayne Porter, member fast68plymouth 802 951 1955
Thanks John, I will look into that.
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