Announcing TopgunZ ACE Supercharger Kit!

Spooler · 06-20-2021, 12:30 PM

Quote:

Originally Posted by TopgunZ

22.5psi

There's lots of guys running 16 psi or more. Do the heads lift over time? I wouldn't think so. I'd imagine it's discrete.

Read and watch all of the video's in my thread. It will take 2 weeks or so. Lots of information in there.

redondoaveb · 06-20-2021, 12:57 PM

Quote:

Originally Posted by Spooler

Read and watch all of the video's in my thread. It will take 2 weeks or so. Lots of information in there.

What's the primary failure on headlift (headgasket, head bolts)?

Spooler · 06-20-2021, 01:57 PM

Quote:

Originally Posted by redondoaveb

What's the primary failure on headlift (headgasket, head bolts)?

The guy that had 22psi failure was due to head lift. The other one that started to overheat was due to the cylinders moving around. That eventually will wear down the headgasket and cause a failure. There are 2 problems going on.

1.) The open deck cylinders moving around wearing out the headgaskets which creates an appearance that the head is lifting due to the decrease in clamping force from the wear.

2.) Actual head lift where the cylinder pressure is greater than what can be held by headgasket, Head studds, etc.

Both combined together is very unpredictable of what the actual cause was. That is why there are only 2 methods that are working at the moment. I made it 7k miles with mostly 17psi of boost before my first engine cut loose. That was an open deck block.

I hope this makes sense.

redondoaveb · 06-20-2021, 02:08 PM

Quote:

Originally Posted by Spooler

The guy that had 22psi failure was due to head lift. The other one that started to overheat was due to the cylinders moving around. That eventually will wear down the headgasket and cause a failure. There are 2 problems going on.

1.) The open deck cylinders moving around wearing out the headgaskets which creates an appearance that the head is lifting due to the decrease in clamping force from the wear.

2.) Actual head lift where the cylinder pressure is greater than what can be held by headgasket, Head studds, etc.

Both combined together is very unpredictable of what the actual cause was. That is why there are only 2 methods that are working at the moment. I made it 7k miles with mostly 17psi of boost before my first engine cut loose. That was an open deck block.

I hope this makes sense.

Yep, makes sense. I appreciate the explanation

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