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BT HiRiser Mod.

November 30 2017 at 3:33 PM
Bart   (Login RATPOISON511)
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If new hi-riser heads become available, I suggest that the rear water passage be not drilled. This should help in stopping the cracking which has occurred. This would mean there would be a right and a left head. There is a stress riser right at the rear head bolt. We have shut the water passage off by welding. We hope this will eliminate the cracking which has occurred.

 
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XR7
(Login XR7)
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been fixed

November 30 2017, 6:21 PM 

The BT HR heads cast 3 years ago fixed that already. The water passage is still there (both ends), just a lot smaller, and has much more "meat" around the outer head bolt tube... and into the the water, as well as a "bridge" across the top to the valve cover rail, plus the rocker pad is beefier all across the head and around all head bolt holes too. I only torque the head stud nuts to 95#, haven't had any issues at over 14 to 1 and/or over 1000 HP.

I am not sure what mods or upgrades they were talking about, maybe someone will chime in on that. Art usually does something new/different, every time he casts them. Always trying to improve.

 
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DaleP
(Login Posi-67)
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I got "treed" by XR7... so nevermind. N/M

November 30 2017, 6:38 PM 



    
This message has been edited by Posi-67 on Nov 30, 2017 6:40 PM


 
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