Epoxy exhaust port?

[clifforion]

Hi there, how is everyone today? This is my first post here so bare with me....

This is a several part question......

I have a 462 and I have cleaned up all the casting marks and slightly made the exhaust port wider with a ignition advance and a base gasket delete with muffler mod. I ended up with .017 squish. I think it runs well.

I did not have a degree wheel when I last took it apart.

I have heard on here that a lower exhaust seems to be the way to gain torque...

Jb weld has ultra high temp epoxy rated at 2000 degrees....

Whats the thoughts on something like this to lower the exhaust? I may not need to after I put the degree wheel on..just thinking right now and curious where I want to go with this. I can live with it the way it is just thinking forward and really want more torque.

I will be honest I am more interested on the epoxy question more just out of curiosity.

Thanks for your time
Keith

 

[cus_deluxe]

have it machined.

 

[cus_deluxe]

but ive tried the jb hi temp on an exhaust port that i ground through the top. it didnt last. disclaimer:i couldve prepped better, but i dont think it had a chance.

 

[huskihl]

After .045” from the band and setting squish, I don’t raise the exhaust back up on a 462. Can still see the factory bevel in the middle of the roof when I’m done.

 

[Stump Shot]

After .045” from the band and setting squish, I don’t raise the exhaust back up on a 462. Can still see the factory bevel in the middle of the roof when I’m done.

+1

 

[andyshine77]

In my experience you will gain torque, however unless you have a way too much duration you won't gain a huge amount. The 462 is a bit higher stock than I'd like, but not as bad as the last 390 I did. As mentioned machining is the best option, I would not use epoxy on the exhaust on a work saw, it's common on cookie cutters and piped saws.

 

[Nutball]

I've tried the high temp JB, and it didn't look good. There is a thread somewhere on here about a couple of us trying it.

 

[clifforion]

Thank everyone for your responses sorry I didn't reply sooner.

At this point I am probably going to leave well enough alone....but trying something new/different I am sure will get the best of me sooner than later.

This is a great and informative site thanks everyone.

Keith