Posted this on another thread but big enough news that the rest of you might as well see it too. https://www.trickflow.com/search/pr...-heads-for-small-block-chevrolet?autoview=SKU About $100.00 more a piece than a comparable aluminum head but cost money to develop and I'm sure they rightly predict will be low production. After a quick check flow numbers seem to be on par with something like an Edelbrock E-Tec with a 200cc intake runner.
Johnny Also note the threaded temp sender hole, the only camel hump head with provisions for a temp sender was the "291" casting, this was the 68 issue head and last "true camel hump" head from GM. Wouldn't fly if trying to p*** off as early 60's "period correct", probably not a consideration for most hot rodders though.
At the Speed and Machine Shop that my son works at they do CNC programs to enhance aftermarket heads. Shhhhh
Searching to see what spring pressures were on these and found a detailed online article. http://www.chevy********.com/tech-stories/engine/double-hump-heads-trick-flow/
When did the prices change on 194 camelback heads? Few years back I couldn't get $50.00 for a rebuilt pair and guys were taking them in for s**** as nobody was buying them.
The TF heads look nice. There are just so many good new heads out there, it doesn't pay to try to resurrect a pair of 50 year old heads that may have issues. Unless you're doing an exact restoration where that kind of **** counts.
My trick flows have steel inserts for the plugs and studs. granted mine are over 20 years old and are twisted wedge heads but I can't imagine that they would have changed them for something different.
I have a set of the 5.0L twisted wedge heads that accept the 5/16-18 Allen bolts and those didn't have the heli-coils These heads were set up for the bolt on rockers...
I looked the pictures over, no inserts that I could see anywhere. But with rocker studs, once they're in, they're in. I have 7/16" co**** studs in my Dart heads, plenty of holding power.
I know my next big ticket purchase for my T now. Finally a head that looks the part, doesn't weigh a ton, and can be easily repaired if bad **** happens. Online calculator shows those flow numbers are theoretically capable of supporting 489hp as cast. Probably not the most accurate calculation but good enough for a ballpark and I'm pretty impressed. Already checks off the boxes for hardened valve seats, floroelastomer valve seals, bronze valve guides, and ready for screw-in rocker studs. There's a lot of guys that'll not see the point in these and stick with the oe castings but I'll be happy as a two peckered billy goat.
Even in aluminum heli-coils aren't any better than a correctly tapped hole. Here is an excellent discussion/commentary on the subject. http://www.practicalmachinist.com/vb/general/thread-chaser-tap-237679/index2.html
I spent more having a set of 2.02 camel humps done than I could have bought new aluminum heads for. True milled ,new valves, guides ,springs , 3 angle valve job,screw in studs, bowl work. Just cause I wanted them on my 327.
The thing about the heads in Portland is I live in Texas so shipping both ways, buying sight unseen. I am picky about my machine work. And they are late model heads with accessory holes. But thanks for thinking about me. Sent from my SM-N910V using H.A.M.B. mobile app
Some never will get it. Some of the things we do are an exercise in futility, but we do them because of the way it makes us feel.
You know, if I thought you were serious about them I (might) go look at them. I'll save us both the trouble because: 1. they aren't "true" camel humps. 2. Even with exchange, at that price, some corners had to have been cut somewhere. 3. they're on C/list.
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