SBC Aluminum head choices??,etc

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Re: SBC Aluminum head choices??,etc

Post by MELWAY » Tue Oct 31, 2017 4:35 am

cgarb wrote:
Mon Oct 30, 2017 9:41 pm
Don't cut well ported 292's too much slack. They ran hard for what they are. If they are well done they will beat most 200 runner heads out of the box.
This is also very true. They went crazy fast for their size and age. So many newer heads are so wrong out of the box
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Re: SBC Aluminum head choices??,etc

Post by Walter R. Malik » Tue Oct 31, 2017 10:06 am

garym wrote:
Mon Oct 30, 2017 7:41 pm
Thanks for the replies.The iron 292 heads that I had ported were ported to the max and I was wondering if a 200 cc aluminum head is going to be big enough.The heads are were ported extensively, and I want to get a cylinder head as close to these without all of work.As the pushrod pinch area I will put more material(weld) to get the intake port wider , the iron heads that I have are opened up a lot.I know that this 331 motor loved a lot of RPM and with my car weight of 2300+ lbs 9.67 @138 mph is not too bad for a home built motor. Again thank you all for the replies this is a GREAT forum. garym
Max ported 292 heads without brazing or epoxy can not even get much bigger than 198 cc's.
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Re: SBC Aluminum head choices??,etc

Post by garym » Tue Oct 31, 2017 8:09 pm

Thanks for the replies.Yes the 292 heads that I have had the dimple in the combustion chambers welded and a sleeve was pressed in the head between the two intake ports and the intake runners were ported to these sleeves.Intake ports were widened and epoxy was used to fill what was ground out.If you can get ahold of the book by bill Jenkins Racing the Chevrolet Engine these heads that I have are very close to what he ran back in the day.I probably will try to buy a burett and measure the intake volume. THANKS garym

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Re: SBC Aluminum head choices??,etc

Post by jmarkaudio » Wed Nov 01, 2017 9:48 am

Chad Speier should be on your list to call. He can size a set of heads for the RPM range you plan to run it in.
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Re: SBC Aluminum head choices??,etc

Post by redliner » Wed Nov 01, 2017 10:00 am

Speier Racing Heads should be at the TOP of your list! Chad has some killer heads! I have owned a set for 7 years and have just ordered a new and badder set. I will run ONLY Speier Racing Heads! My last 11.1 383 sbc went 10.75 @ 125 @3200lbs on pumpgas. THANKS CHAD!

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Re: SBC Aluminum head choices??,etc

Post by garym » Sat Nov 04, 2017 8:30 pm

I called Pro Maxx on their 225 CNC aluminum heads and they gave me the flow#'s as : 500 liftr 296 int 205 ex
600 316 int 225 ex
700 319 int 238 ex
800 326 int 238 ex 2.08 int 1.60 ex valve of
so I am still doing more thinking and asking questions, but I want to know how these heads flow compared to the 292 heads that I have as I plan to reuse the 2.05 5/16 int valves and the same size ex valves as per the above flow#'s.What would you think on how the reworked 292 iron heads would compare to the cnc pro maxx aluminum heads?? THANKS garym

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Re: SBC Aluminum head choices??,etc

Post by af2 » Sat Nov 04, 2017 8:43 pm

garym wrote:
Sat Nov 04, 2017 8:30 pm
I called Pro Maxx on their 225 CNC aluminum heads and they gave me the flow#'s as : 500 liftr 296 int 205 ex
600 316 int 225 ex
700 319 int 238 ex
800 326 int 238 ex 2.08 int 1.60 ex valve of
so I am still doing more thinking and asking questions, but I want to know how these heads flow compared to the 292 heads that I have as I plan to reuse the 2.05 5/16 int valves and the same size ex valves as per the above flow#'s.What would you think on how the reworked 292 iron heads would compare to the cnc pro maxx aluminum heads?? THANKS garym
If you are buying heads looking at flow#s you are missing the bigger picture.
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Re: SBC Aluminum head choices??,etc

Post by zums » Sat Nov 04, 2017 9:04 pm

garym wrote:
Sat Nov 04, 2017 8:30 pm
I called Pro Maxx on their 225 CNC aluminum heads and they gave me the flow#'s as : 500 liftr 296 int 205 ex
600 316 int 225 ex
700 319 int 238 ex
800 326 int 238 ex 2.08 int 1.60 ex valve of
so I am still doing more thinking and asking questions, but I want to know how these heads flow compared to the 292 heads that I have as I plan to reuse the 2.05 5/16 int valves and the same size ex valves as per the above flow#'s.What would you think on how the reworked 292 iron heads would compare to the cnc pro maxx aluminum heads?? THANKS garym
Your wasting time asking these open ended questions, buy a plastic burette, measure your port c/l and pay 40-50 bucks to get a port or two tested, after that and some other dimensions in the port you can make some educated decisions, my guess is they are around 290-300, where in the port those numbers are made can be two entirely different performing heads
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Re: SBC Aluminum head choices??,etc

Post by racear2865 » Sat Nov 04, 2017 9:17 pm

Look at Profilers from Chad.
reed

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Re: SBC Aluminum head choices??,etc

Post by shoedoos » Sat Nov 04, 2017 9:37 pm

My instinct says Mr Jenkins would be turning in his grave if you put a chinese head on one of his heritage-inspired small blocks.....

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Re: SBC Aluminum head choices??,etc

Post by af2 » Sat Nov 04, 2017 11:26 pm

zums wrote:
Sat Nov 04, 2017 9:04 pm

Your wasting time asking these open ended questions, buy a plastic burette, measure your port c/l and pay 40-50 bucks to get a port or two tested, after that and some other dimensions in the port you can make some educated decisions, my guess is they are around 290-300, where in the port those numbers are made can be two entirely different performing heads
Tom
I can make a sewer pipe flow 2000 cfm. Question is where is it going and what is the velocity/port speed. Large cfm is not the way to select any head without knowing the other questions. AND ProMax is on crack with those flow#s.
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Re: SBC Aluminum head choices??,etc

Post by 68post » Sat Nov 04, 2017 11:40 pm

shoedoos wrote:
Sat Nov 04, 2017 9:37 pm
My instinct says Mr Jenkins would be turning in his grave if you put a chinese head on one of his heritage-inspired small blocks.....
i like this !

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Re: SBC Aluminum head choices??,etc

Post by af2 » Sun Nov 05, 2017 1:27 am

68post wrote:
Sat Nov 04, 2017 11:40 pm
shoedoos wrote:
Sat Nov 04, 2017 9:37 pm
My instinct says Mr Jenkins would be turning in his grave if you put a chinese head on one of his heritage-inspired small blocks.....
i like this !
The truth is almost all are cast in China and every where but here.
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Re: SBC Aluminum head choices??,etc

Post by englertracing » Sun Nov 05, 2017 2:48 am

How about some Brodix bd heads they are the fix for the sbc uglyness

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