6 Bolt heads cracking?
6 Bolt heads cracking? I've been reading of a few different makers 6 bolt heads cracking under boost. How much are they making before they crack? Any brands better or worse? What is the go to 6 bolt boost head now?
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Verdad Gallardo Knowing my friend he wouldn't have run it if he saw the cracks prior, but I didn't ask him. I know he won a couple big $$$ small tire events and lost in the finals to kc maxx at another one. It was like the 4th event on the motor when it happened. Him and the engine builder determined the cause after he blew it up as far as what I know. He is now going 540" BBC with gear driven procharger.
Knowing my friend he wouldn't have run it if he saw the cracks prior, but I didn't ask him. I know he won a couple big $$$ small tire events and lost in the finals to kc maxx at another one. It was like the 4th event on the motor when it happened. Him and the engine builder determined the cause after he blew it up as far as what I know. He is now going 540" BBC with gear driven procharger.
For sure. It wasn’t the first issue he had with them. He inspected them out of the box and had to send them back immediately over a valve guide issue if I remember correctly.
I know there was a valve guide issue right out of the box so they were returned for that. Then it tuliped the valves and were returned for titanium valve upgrade. The the heads cracked.
He was running e85 with air to water intercooler. It may have been at the limits of the fuel. He’s switching to methanol on the bbc and trans will be in front instead of rear like a normal C5. Also sra and 4 link.
The guys I used to help who ran series, and ran in the mid 4s would crack heads from heat, and would have them repaired.
I know Ray Litz did some sort of mod that routed more water to the heads, I could ask for pics if anyone is curious. I think he got the idea from the Ohio Boys who maybe in turn got it from Kurt Urban.
I know Ray Litz did some sort of mod that routed more water to the heads, I could ask for pics if anyone is curious. I think he got the idea from the Ohio Boys who maybe in turn got it from Kurt Urban.
FED heads are junk that is what it comes down to, other people have had issues with them as well.
Yeah you run water around the exhaust ports on the heads but requires machining obviously, its not a shelf option that I have ever come across.
Yeah you run water around the exhaust ports on the heads but requires machining obviously, its not a shelf option that I have ever come across.