Fastest (or most powerful) 317 head car?
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From: Screwston, TX
Fastest (or most powerful) 317 head car? I know kyle was up there with his old 370 setup, just wondering what kind of numbers people can see out of these things without pushing an asston of water? Kicking around some ideas with some buddies and would like to know what limits people have run into.
Nate
Nate
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TECH Enthusiast
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Joined: Jan 2007
Posts: 659
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From: Screwston, TX
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yes, on the small motor (346)
I think those heads went through 3 different "porters" by the time i got rid of them.
They were never that great to start with, i don't think they were ever over 300 on the intake
I think those heads went through 3 different "porters" by the time i got rid of them.
They were never that great to start with, i don't think they were ever over 300 on the intake
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Never that great to start with? sounds like they were getting the job done at 171 traps. And your saying you werent pushing water with them on a 370?
TECH Fanatic
Joined: Jul 2002
Posts: 1,218
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From: MI
Yep..... ive had them hosted since 2006.... LOL
Most of the pics are huge...
1.5-2 MB.
http://www.itlxlr8.com/images/Harlan...Twins%20Setup/
Kyle
Most of the pics are huge...
1.5-2 MB.
http://www.itlxlr8.com/images/Harlan...Twins%20Setup/
Kyle
What are the limiting factors when using a 317 head? Obviously they won't flow as much as an after market head so the power potential is a little lower but looking at harlans set-up, you can still make a lot. What else though, my main concern is strength, the heads with the thicker deck are much stronger. By running a 317 head into the 1000rwhp range will I be risking my new block and everything else or is it just a matter of not making as much power? I don't want the heads to have a massive failure and take everything with them, is that even possible?
With a stock head there could be a few factors that limit power or reliable power for that matter. Using a stock valve over 1200hp is not a good idea. It would be time to look into changing the valves and also after that you will start moving coolant with them too. I am sure Harlen at least had stainless valves and most turbo guys with big hp employ the use iconel valves on the exhaust side.
With a stock head there could be a few factors that limit power or reliable power for that matter. Using a stock valve over 1200hp is not a good idea. It would be time to look into changing the valves and also after that you will start moving coolant with them too. I am sure Harlen at least had stainless valves and most turbo guys with big hp employ the use iconel valves on the exhaust side.