Charlie Brown, your posting covers the subject of substantial improvements & modern knowledge for our favorite engine very well!  As enthusiasts, we are very fortunate indeed...   


Paul

Is Keith thinking of a re run with aluminium heads???Revised ports, bigger valves, larger ratio rockers. the list goes on.However I did work for a guy who got to toy with rotary valve heads many years ago. These would be interesting!!!  

And how many Turbos? I'm curious to see what Aluminum heads and dual turbos would run in an 1800 lb car!!

Frank/Rebop

Bristol, In ( by Elkhart) 

Without digging up the old files, I think the best my roadster went with iron heads was 9.60's.  The EMC engine with the aluminum heads went into the roadster which is when it broke into the eights.

Lorena, Texas (South of Waco)

Four. I think Ted went 8.9 with irons too. Or did he have aluminums already? Ted? Heck, has anyone gone under 9 with aluminums?

 Seppo from Järvenpää, Finland
www.hollowheads.net (just click the hole in the head to proceed)

Top three world's quickest quarter mile Y-machines has iron heads. 




Hyvinkää, FI

I uploaded a photo to the original post. Its the only way I have been able to upload photos so far.

Thanks Bill, I figured about $3K.

I've found DHL to be the best for me.

 

I agree in some ways of what your saying about street heads. And its something I should seriously consider before porting a second time around these "113 heads"

I should say it wasn't so much the size of the ports, I was interested in but the equilibrium of each port. Yes I opened them up but only replaced valves with std 1.92in + 1.54ex with about 0.480" lift. I am pretty crafty when I need to be yet I'm no match for a CNC machine. I guess I will start with flow benching and see what they are like" how balanced I have ported them. Apparently a good flow bench can show low & high current areas.

Frank, thanks for your respected and relevant input ! keep on keeping on mate ! best regards bill.


  AussieBill            YYYY    Forever Y Block     YYYY

 Down Under, Australia

Due to casting shifts it would be better to extrude hone and or maybe have the areas matched up to gaskets and remove sharp corners. Rmember reading that some old tuners like to keep exhaust port velocities high.