Hsp Manifolds warped

[x MadMAX DIESEL]

I am reinstalling some hsp manifolds on some new heads. Got bottom tight first. Having trouble with the top row not wanting to get tight. Don’t have a torque wrench on it but arm says it’s at the 28 pounds already and I have about another 1/16th to squeeze before the gasket compresses.

Has anyone had these warp? I tried to chase the threads in the head but dropped and lost my chaser. So I got a Normal Tap and ran it in all holes to clean.... of course I can’t get the bottom 3/16ish cleaned cause the nature of the thru hole tap (non bottom end)

My bolts are 30mm long


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[Duramax racer 8]

Are they about 3 years old? Had the same issues about then.

 

[x MadMAX DIESEL]

Are they about 3 years old? Had the same issues about then.

Yes, maybe more!

 

[x MadMAX DIESEL]

They are not a tubular log style like the old RDL ones though, they look a lot like a steed speed style where 2 halves are welded together


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[duramaxzak]

I had one of the first sets of 2-1/4" billet ones and ran for 3 pulling seasons and never had any issues with them. I did run Levi's blankets on them though, maybe that help some.

 

[coker6365]

There was an issue with he heat treatment process that allowed them to warp during heat cycles. Call Charles, they can be heat treated and machined back to a true surface. They are also working on a 2nd design, which is what I have been waiting for.

Charles has been helpful, I just havent sent mine back to be fixed yet.

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[x MadMAX DIESEL]

Mine had Levi’s blanket too. I think I will see how they do. If they leak... maybe I’ll call them up. Gonna try to make a test hook this weekend. I’m pretty sure I got them 2014 when they came out


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