241 ' s vs. 706's
#1
241 ' s vs. 706's
Ok, so I bought a 02 5.3 and it has the 706 heads on it. I thought that if I could find sum 241 casting heads that they would be a better head to run on my 5.3. When I get done with the engine it will have a TEXAS-SPEED 224R cam, Gen 4 5.3 rods & pistons, Shoenfeld long tube headers, a truck intake, 4L60 trans w/2800 stall and 4.10 posi rear gear. All that is going into a 98 GMC 1500 SWB truck. When I called TSP about the 224R Cam, the tech guy told me to not run the 241's because the smaller valve 706's are a WAY BETTER HEAD!!!!!! I find that hard to believe....
Can someone with ALOT more knowledge about which LS head to use PLZ HELP ME!!!!!!!! Thanx Kevin
Can someone with ALOT more knowledge about which LS head to use PLZ HELP ME!!!!!!!! Thanx Kevin
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Johnny408 (10-27-2019)
#4
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If I remember right, the intakes flow similar and the exhaust side on the 241 flows like 10 CFM more. Compression will be higher with the 706, and they're used for CNC programs a LOT more often than the 241 and other LS1 based heads.
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http://houstonperformancetrucks.com/...h-flow-numbers
I wouldn't say the 706s are a "way better head" but they do flow similar despite the smaller valves and will have higher compression
I wouldn't say the 706s are a "way better head" but they do flow similar despite the smaller valves and will have higher compression
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Originally Posted by KevSr88
What about the 706's cracking??? I've read quite a few articles, threads about those heads cracking alot......
Personally I'd go to 799 or 243 heads, but that's me.
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5.3 are easier. To get more compression. They can use so extra love on the exhaust side. If looking for 5.3 heads call TEA and ask for the NOS exhaust port for you 5.3s and hand touch up. Worth talking to TEA.
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That makes no sense to me either. The 241 has larger valves, only makes sense to go with them on a budget deal. Open up the area behind the valve, clean up the guide and casting a little home porting/cleanup and you'll be set. You'd have to mill them to get your CC as small as the 706's is all. I'd take .030 off the 241 and run it. I don't see how a 706 could keep up at like CC sizes.
#18
241 vs 706
I read sum threads from a few yrs ago lastnight and it said that the 241's are the best head to run on a semi stock LS.
I dropped them off at the machine shop this afternoon so we will see.
I will keep you up to date with everything once I get them back and put on.
Thanx again
I dropped them off at the machine shop this afternoon so we will see.
I will keep you up to date with everything once I get them back and put on.
Thanx again
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