Bob's Aluminum 409 Block

[58 Apache]

Very nice indeed. Good luck with the testing. Can't wait to see the Iron one.

 

[409newby]

Very Very Nice

 

[CDNpontiac409guy]

DAMN, this is nice s***, Bob

Would be good to the exhaust manifolds tooled up as well

I'll try to keep up... maybe we can make this the year that all this finally comes together.

 

[region rat]

We.ve cast a bunch of the manifolds in aluminum. Only one set in iron. Hope to do some finish work on them soon.

 

[jim_ss409]

The aluminum manifolds are pretty neat. Did Chevy ever use aluminum on any of their engines? I think some of the Pontiac Super Duty's had aluminum exhaust manifolds.
My first thought is,,, would they melt but when you think about it aluminum pistons and cylinder heads don't melt. I'm guessing they'd be fine as long as the engine was tuned properly. I suppose a guy could even get the inside of the manifold done with ceramic coating just for a little extra insurance.

 

[region rat]

From what Pontiac guys tell me, the stories of melted manifolds was old wives tales. I talked to guys making Pontiac manifolds now say if you make them right and put a thermal barrier inside and flanges you would never have a problem. I have a pattern guy improving the patterns to make them easier to pour. I just wish my foundry in Chicago could do iron. That had no problems with the first pour.

 

[Skip FIx]

Like Jim said -figure the heat in the aluminum heat exhaust port of the head is probably a little hotter than in the manifold and they don't melt! Now if you get an exhaust gasket leak that might be a different story.

 

[skipxt4]

That block, IS AWESOME, Bob.

 

[lilbuzzy]

bob, quit showing my block to everyone....i haven't even paid for it yet!

 

[region rat]

I can take a check anytime!!!

 

[chevytaylor]

Looks great Bob