JB Weld in Intake Ports?
JB Weld in Intake Ports? There is allot of dead space and wasted CC's I am finding in LS1 heads. I want to fill in the port floors once I finish up my ports. I have seen JB Weld used in the past but I am not sure how that will hold up to the alcohal that is in the fuel now. It would also take a ton of tubes to fill 8 intake ports. Are there any other "materials" I should be looking into for filling intake ports besides welding? This will be a daily driver and I will match the intake to it.
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Joined: Sep 2009
Posts: 2,481
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From: PA/MD
Z spar is about the only thing is use. I've used jb weld on parts that come in contact with fuel and it started getting soft very quick....I would hate the thought of losing an engine because it sucked a chunk of jb weld into the chamber.
There is allot of dead space and wasted CC's I am finding in LS1 heads. I want to fill in the port floors once I finish up my ports. I have seen JB Weld used in the past but I am not sure how that will hold up to the alcohal that is in the fuel now. It would also take a ton of tubes to fill 8 intake ports. Are there any other "materials" I should be looking into for filling intake ports besides welding? This will be a daily driver and I will match the intake to it.
I was going to JB Weld at first but I am thinking more along the lines of the stuff GM uses to adhere Corvette inner fenders with. I had to replace one and the epoxy is no joke. It sets quick and has the slightest bit of flexibility.
Devcon aluminum epoxy, this is what was used by many to fill in big lazy intake ports to create velocity and better V/E. Not effected by fuels once set and takes on the same expansion/contraction rate as aluminum because its main ingredient is aluminum.http://www.all-spec.com/products/Dev...-00/11350.html smaller sizes available, check all their products, there's one ideal product for filling in ports. Be very careful welding in ports, cracks happen.
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