Cylinder Head Upgrade

[Bort62]

I should also add that a pair of AFR's for the SBC cost about as much as one of Mike's heads...

 

[MustangSix]

I should also add that a pair of AFR's for the SBC cost about as much as one of Mike's heads...

True enough, but volume tends to drive prices. Go price an aftermarket alloy head for a six cylinder Healey.

 

[Bort62]

I should also add that a pair of AFR's for the SBC cost about as much as one of Mike's heads...

True enough, but volume tends to drive prices. Go price an aftermarket alloy head for a six cylinder Healey.

My point is just that a pair of comperable performance heads for the most common engine in the world is not really a whole lot less than mikes head.


So I think he is being extremely reasonable with the price.

 

[82F100]

Greg I suggest maybe sending P.M.s to Mraley,BillR57,Mustang_Geezer and talking to them about the performance aspects of the new heads and other goodies. Existing headers fit the new heads so theres no need for new headers. For what it's worth one forum member had a cast aus head and a stock aus intake and holley 350 2v, Just swapping to this head and intake netted a 40 hp increase at the rear wheels. Mraley has done some dyno runs as well. I believe he gained 9 hp & 13 ft pd of torque over a DSII dizzy and a MSD6 box using the DUI distributor this was at the rear wheels as well. You already have the Clifford head correct? just curious what year head is it?

 

[Anonymous]

OK at the risk of sounding stupid I'll bite, what's the extra expense of Al head going to do for me. We're only talking one, not two as with a V8 and the cast heads are not monsters so weight difference can't mean that much can it? I'm already throwing away the money I put into the 200 cast head with the Clifford performance kit only having a few hundred miles on before I realized I'm pumping a dry well on going faster with that. Now before you guys start telling me you gotta pay to play. I have several cars I'm working on at any given time and, with the excpetion of the 66 fsk 6 waiting for the snow to melt, they all run and get their share of investment to stay that way. If were talking night and day power gain over the cast head maybe you can get my attention but, would the cast head with the extra $500 not spent for Al put into a good ignition system be a better path to go faster?

Greg,

Check out my page comparing the et's and trap speeds of a fully tricked out 1978 log head with a direct mount Holley 500 cfm 2 bbl carb compared to the stock out of the box Classic Inlines aluminum head with the same Holley 2 Bbl carb.

http://www.geocities.com/mustang_man_19 ... slips.html

I've did a mild gasket match port/polish job on the aluminum head this past winter and installed the larger diameter intake valves with a new 4 Bbl intake & 600 cfm Holley 4 bbl.

It oughta run 14.70's @ 95 mph this year.

Considerably better than my best of a 16.11 @ 83 mph with the log head.

Later,

Doug

 

[Greg Gaitens]

To answer the question about what head I am currently running. It is the head that came with the original 200 six in my 66 Stang. If there was more than one type used for that year, on that motor in that car. I would have to actually hunt for a casting # or something to tell you more.

I appreciate all the help. I am sencerely impressed with the good advice and support. I can sense the deication for performacne from the group and I haven't even visited the race forum yet. I think I will go buy stock in Alcoa as there seems to be a strong market for Al for quite some time. Maybe all my experience repairing rust on vintage Fords make it hard for me to get excited about metals that don't turn brown and turn to dust.

 

[82F100]

Greg, the reason I was asking was because the 78' and later log heads have a larger log diameter and bigger valves and the later heads are desired for those upgrading performance to the next level so to speak.