Home porting a set of 516 heads ?

[1967coronet]

PRheads, thank you for taking the time to share the info and pictures of your work.
and again thanks to all you guys for your advice, pics and help.
I will be giving this a shot and doing my best not to mess up a good head.
For me just starting I figure less is more lol. We have some extra heads of different makes down in the shops storage room so I do have some to practice on.
Its times like this that I know this is the best mopar forum/web sight.

 

[Brandy]

PRheads, thank you for taking the time to share the info and pictures of your work.
and again thanks to all you guys for your advice, pics and help.
I will be giving this a shot and doing my best not to mess up a good head.
For me just starting I figure less is more lol. We have some extra heads of different makes down in the shops storage room so I do have some to practice on.
Its times like this that I know this is the best mopar forum/web sight.

You will be fine pal, just study up and practice.

 

[HEMI-ITIS]

These were in a cabinet for over 20 years.Finally put them on last year.......More in,,,,,,,more out!!

 

[PRHeads]

If you’re new to this, I think before any chips start flying you should read those two old Dulcich articles, look at the pics, and formulate a plan of exactly what you’re going to do.

Then start making chips.

 

[polyjohn]

Great thread and nice hemi heads too!

I posted on the other thread about 'OP 516 heads' lol.
Never had any faith in them due to the rubbish 516 exhaust port casting , UNTIL NOW!
Seems all the heads I had up until now were 1966 heads, last year of manuf...
I specifically bought them as I believed they would be the 'best' casting just before the 915???
But I RECENTLY picked up two more pairs, a 64 and 65 pair and they is different.
Much better exhaust ports, even very close to the 915 for flow!

So why are the 66 castings so bad???

ps, the Dulcich articles are mainly blocked to us limeys NO-WAY!!!
Seems the 'special relationship' is not so special now...

 

[67_satellite]

Just to try to add to the old post, these are the best 906 heads I have been involved with. This 72 R.R. Has since been a best of 11.08 @123m.p.h.3850lb. race weight. Stock stroke 440+.030" 10.6:1 compression,3.91 rear, 3800stall10" conv. Victor intake,1000 c.f.m. 4150 carb.,2" headers w/ 3" ex. to rear axle,S.S. springs& cheap shocks all around.Ran a race gas mix for a long time.The more pump gas he runs, the better it gets(?) I last massaged these in the year 2000. About 50 hrs. total in them since the early 90,s.I think I could improve them, but a 3.9" stroke 440 with 240 T.F,s is in the works,and he doesn't want to mess with them.I have thought about trying to buy these to " max them out" just for my own amusement.Would have to check my old notes, but they were very close to 300 c.f.m. on the intake side, 11.17 pass - YouTube

 

[67_satellite]

P.S., The Dulcich articles are among the best you will find from a magazine article. The 666 H.P. "Air Hammer" rocks. Recently brought it back for a Lobe sep. episode of engine masters.\Good stuff for us "luddite" iron head Mopar guys,

 

[Orig69]

Years ago I picked up a set of porting templates from Direct Connection that came with instructions which made it very easy once you got use to it. I used them on an original set of 906 heads I had on my 440 four speed car, even with the original valve size the performance improvement was much more than I expected. The other amazing thing was, I only paid $10 for the porting templates.

 

[PRHeads]

For those looking for stock heads to flow way more than they do as they came from the factory........ but don’t want to learn how to port heads, and then spend many hours making iron dust.........
KG Engines in Kansas Ohio has a very nice CNC program.
I had a customer send me a set of cnc’d bare 906 castings from them, and then I did the guide and seat work to finish them up.
290+ cfm...... no muss, no fuss.

 

[BSB67]

For those looking for stock heads to flow way more than they do as they came from the factory........ but don’t want to learn how to port heads, and then spend many hours making iron dust.........
KG Engines in Kansas Ohio has a very nice CNC program.
I had a customer send me a set of cnc’d bare 906 castings from them, and then I did the guide and seat work to finish them up.
290+ cfm...... no muss, no fuss.

Wow. Good to know.

 

[PRHeads]

After I flowed them, I thought to myself;
“Well........ I guess I won’t be doing any more big porting jobs on 906’s”

 

[BSB67]

After I flowed them, I thought to myself;
“Well........ I guess I won’t be doing any more big porting jobs on 906’s”

Kinda felt like you were shooting yourself in the foot.

Or maybe you wont miss the iron dust, and have a polite way of moving customers in another direction......

 

[PRHeads]

I don’t feel like I need to do anymore 20hr+ porting jobs on 906 heads.

I’m happy to let KG cnc port them, and if someone wants me to do the final stages of prep(guides, seats, etc)....... I’m good with doing that portion of the job.

The reason I got to see a set of their cnc’d 906’s in the first place was because I basically turned down the porting job, and suggested they contact KG(I had heard good things about their cnc program for 906’s).
This was an existing customer who preferred me to do the final prep.
I was fine with that, and so was KG...... so that’s how it was done.
After getting them done and on the flow bench....... I knew my days of the “big” porting jobs on those heads were over.

I still have some factory stuff here for reconditioning, and some mild rework, which is fine........but I’ll let the big porting jobs go somewhere else.