Slant 6 Split exhaust

[pishta]

I've heard if you peen the weld with a pick hammer as soon as its laid, it helps relieve the cracking too. Interesting....

 

[roccodart440]

I've heard if you peen the weld with a pick hammer as soon as its laid, it helps relieve the cracking too. Interesting....

That is true but you use the ball end of a ball and peen hammer to do it.

 

[Slantsix64]

Nickle rod is your friend on cast iron. Here's a set I made for a member he needed the heat riser tried me hardest to tap the third bolt, was a no go. this one won't have a functioning heat riser although it will still provide a lot of heat mounting it with no gasket on the bottom of an aluminum intake, will be welding it shut throwing it on eBay.

 

[waggin]

How do you MIG weld cast iron, anything special or tricks? Preheat?

have to use the early slant manifold I cant seem to get the weld to work on the later two rib manifolds

 

[ElFin]

One way to economize that makes sense is to buy a Dutra casting for the front 3, and use a stock manifold for the rear 3 exhaust ports, which retains the factory heat for quicker warmup times. You have to cut and cap the rear section of the manifold.