The price is no problem, I can afford it. But would it bring any noticeable difference in power? My engine is bored over x .040. I got a 254 x 264 cam on the way from Langdon’s, and dual Webers with dual exhaust. My deck has been shaved pretty low, pistons are just barely below deck height. I contacted the seller to see if the valves will clear my pistons, and he says that he recesses the valves when he builds these heads and they will clear even if the pistons are flush with the deck. Cost aside, what do you guys think? Would this head give me any noticeable difference in power? Sent from my iPhone using The H.A.M.B. mobile app
Ed "Isky" and Frank McGurk had a relationship back in the day you might want to contact Isky http://www.iskycams.com/contact-us.html for advice they may have some "stovebolt" info from "back in the day" to pass on to you. Do you have this book ? https://www.amazon.com/How-Hop-Chevrolet-6-Cylinder-Engines/dp/1555611478
I do not have this book, but I just ordered it, and will have it in 2 days. Thank you! I’m gonna contact Ed, hopefully he can give me some input as well. I’ve also been talking to tom Langdon, and will get his thoughts next time I speak with him. Thanks for the reply! Sent from my iPhone using The H.A.M.B. mobile app
The 848 head is the one you want. You won't be making a mistake of you put it on your engine. It's the later head from 1956. They were used as it had a little more compression than the stock heads did.
If you are racing the car regularly you might notice the difference, in the time slips. Or maybe not. Seat of the pants? It's just gotta feel quicker, after spending the money for a port job!
If you get it. I would cc the chamber so you know the compression. Plastic burettes are cheap on Amazon and you can get plastic from ACE hardware for the plate. The formula to do the math is on the KB piston site and real ez to use. Cloyse has a gear set to advance/retard the cam and advancing will help seat-of-the-pants feel but you need to be careful with the intake valve hitting the piston with the decking that's been done. Good luck..
I would think for that kind of money you should have flow numbers off a flow bench, before and after porting. It doesn't take much to screw up a port cutting out material, the flow benches do not lie!
What Joe H said. Not sure the costs but think that this is pretty high price tag on that head. You can get an aluminum head through Summit for $1K to $1300. To me that would seem like a much better deal. You could even paint it if you didn't like the bare aluminum. Just saying.
I remember reading a story many decades ago about a sailor on a submarine carried his GMC cyl head on the ship with him. Spent two years porting and polishing on it. When he got home and installed it . He cracked it the very first pass down the track.
Ok, talked to a few old timers now; seems it wouldn’t make much difference except at very high rpm, even if it was done perfectly. Looks like imma pass, regular 848 is going back on it. Sent from my iPhone using The H.A.M.B. mobile app
Also on the wild side: https://www.superchargerforums.com/threads/chevy-235-inline-six-blower-build.2007/ Since the 235 has fairly low compression boost might be an interesting option.
Give this a read,maybe you could join him for lunch: https://www.hotrod.com/articles/ed-iskenderian-the-camfather/ Having lunch with the Camfather would be something to treasure for years,not a lot of our legends left.
That's my 235. Thanx for linking it. Sorry to report that I'm slow as a glacier and there isn't much more story yet as I'm currently engaged in rebuilding my other truck. I did manage to find a Vertex magneto to add to the mock up since that post was last updated.
Sell the Chevy and get one of these 99% of the people can't tell the difference. https://www.ebay.com/itm/302-GMC-mo...b8e8694f64a0db0035d1e3bb37&LH_ItemCondition=4
GEN X 235 head for small block https://www.summitracing.com/oh/search/make/chevrolet/brand/trick-flow-specialties?N=brand:trick-flow-specialties&PageSize=100&keyword=235 cylinder head&ar=1 Not quite the same just as you figured.
I'm concentrating on my other truck but soon I'll be back to work on both. Daily heat indexes have fallen below 100 this week, here in South Florida, and I can stand being out in the shop again.
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