ported/polished/coated manifolds 3Q's in 1

[RoughSilver92]

That's not bad for just the coating. I think I wold feel comfortable trying my hand at porting a set of manifolds, then sending them out to be coated. Probably pretty hard to mess those up too bad. Not like there are water jackets or anything to watch out for like in a head. I've always thought it would be interesting to see what kind of gains could be made with minimal performance parts by simply optimizing what is already there. Like special coatings, synthetic fluids, water wetter, coldest inlet air possible, stuff like that. Probably not huge gains, but still interesting.

[Johnybeas]

What's the science behind the spacers? What are they supposed to do??? How much are the spacers??? Also, can't any machine shop port and polish the exhaust manifolds (or headers as some would call them)? Has anyone found anyone who would do it cheaper??? If you were to go to a machine shop and ask for them to be ported and polished are there any specific measurements to have them ported out to??? Sorry if some of these are newb questions, I'm still learning.

[RoughSilver92]

I believe the idea behind the spacers is to keep the intake temp. down. There may also be some benefit from longer intake runners at a given rpm range, but I am uncertain about that. As far as price and where to buy, idk. Probably in another thread somewhere, or maybe somebody will chime in. And yes, a machine shop could probably port a manifold for you, or at least direct you to someone that could. Or you could get a die grinder and try it yourself, maybe practice on a piece from a junkyard first. I found a great how-to a few years back by a company that sells a kit with the stones and abrasives you would need.
http://www.sa-motorsports.com/diyport.aspx
From what I understand you want your exhaust manifold passages slightly larger than the exhaust port on the head to keep exhaust gases from traveling back into the combustion chamber.

[RoughSilver92]

But be sure to keep the openings slightly smaller than the gasket so it will seal.
So basically just follow the nice outline of carbon buildup.

[Johnybeas]

Originally Posted by RoughSilver92

...So basically just follow the nice outline of carbon buildup.

lol I hope someone chimes in, if it's inexpensive and causes significant cooling, it might be a worthwhile investment.

[RoughSilver92]

It looks like the phenolic spacers are from outlaw engineering.
I don't know if they are still available, but their website is here:
http://www.outlawengineering.com/index.html
I hope I can still get some!

[svxfiles]

My intake manifold never gets hotter than 140°f.
A normal manifold after the engine warms up is much closer to 200°f.
I have both sets of spacers, the ones to the stacks, and the ones to the "spider" manifold.
My manifold is also vented and ceramic plated.
You can call Outlaw Engineering directly.
317.496.7205
I am very happy with this product and will install them on other 3.3s in the future.

[Sov13t]

Originally Posted by svxfiles

I am very happy with this product and will install them on other 3.3s in the future.

__________________

[Johnybeas]

sounds awesome tom, how much much did they cost?

[RoughSilver92]

Wow, Outlaw Engineering is right here in Indiana, too!
Now what does a "vented" intake manifold mean? The only thing I can think of is maybe you have a hood scoop.

[svxfiles]

Originally Posted by RoughSilver92

Wow, Outlaw Engineering is right here in Indiana, too!
Now what does a "vented" intake manifold mean? The only thing I can think of is maybe you have a hood scoop.

Whats a life?

[RoughSilver92]

What the...? Do my eyes deceive me? How is that possible? Wouldn't you be sucking in unfiltered air in those areas?

[RoughSilver92]

I like the polish job.

[svxfiles]

Originally Posted by RoughSilver92

What the...? Do my eyes deceive me? How is that possible? Wouldn't you be sucking in unfiltered air in those areas?

Those areas are just webbing between the runners.
By cutting "chimneys" in it I allowed excess heat to escape.
Most likely it does very, very little.

[svxfiles]

Originally Posted by RoughSilver92

I like the polish job.

That is the ceramic coating, that keeps radiant heat out.