Xtreme Fabrications/Performance Services AND Maperformance.

[Jordan Kruger]

I wouldnt be too concerned, as many people have ran that manifold without port matching, etc...
Ideally, youde like to have both ports the same size,  but the head is "upstream" so to say...
But with that being said,   After being told my tuner shop that those particular manifolds are super turbulent, to the point where exhaust pulses are making their way up their neighboring runners due to short unequal runner lengths,   Ide say that you could actually be dealing with heat going upstream and heating up the head just like you had mentioned.  Its all theory from me, but my tuner shop has told me time and time again that the FP race manifold has some flaws to its design.  Its hard to say exactly whats going on without some extreme testing.   A flow bench wouldnt work either. Youde need to have it hooked up to reproduce the pulses that the exhaust gives off, to properly represent what the exhaust manifolds characteristics are while on an engine. 

If you ever get a chance,  port match.  But i dont think you have to be overly worried.  It would definitely be an issue if the header ports where smaller than the heads ports.

[John Hartman]

what you are saying about the FP cast manifold may be true, but not about the port matching.

With a turbo exhaust manifold, its ok if the head ports are smaller than the exhaust manifold runners.  It helps keep reversion to a minimum.  At higher boost, the pressure in the exhaust manifold can get really high and having bad reverse flow keeps it from going back into the head, as mich as it could with a port matched head.

Or so I was told when I planned on doing the same thing a few years back.

PS how much was that manifold?  Looks great and obviously flows better.  I am happy with my FP manifold and it was a noticable increase over the ported 2g one, but some day I may go for something better.

[Jordan Kruger]

$875 shipped. 

[Jordan Kruger]

and its true,  you should always have a larger exhaust port on the manifold than cylinder head port. Burnt valves would suck.

[John Hartman]

hehehe, yea they blow, then suck, then blow, then suck.

and not in a good way either you pervs...

[Jordan Kruger]

lol.    Once I get the map manifold, Im going to have it coated.   Im thinking clear ceramic. The manifold looks too nice for a color!

[Robert Vorley]

$875 shipped. 

Now that is a deal!

It would be a shame to hide that polished SS.  Get chrome.. 

[Jordan Kruger]

Welp!  Visited Racing Greed today and finally got to see my new Maperformance manifold.

Its a piece of art!  Not to mention an awsome design.  The piping is large and all transitions are super smooth. 
The collector looks indestructible and its completely knife edged from every angle.
The wastegate flange is part of the one piece collector, and the whole collector looks very strong.
I have never seen a manifold with such a good collector.  All the runners converge into the collector evenly.
The welds look perfect.   Its a shame to think I might wrap it!

Without running the manifold I cant give it any sort of power review yet,  but it looks very promising.

Thanks to Racing Greed for the good deal***

[John Hartman]

the flanges are really nice!

[kevin derhouson]

had the same impression when i opened up my ext wg/o2 housing, maps welding and build quality is excellent.

[Jordan Kruger]

I saw your motor and it looks great Kevin. Coming along real nice.  Is your intake manifold ported?

  The manifold exceeded my expectations. 

[kevin derhouson]

believe lowell ported that intake manifold


it would be a shame to wrap that manifold jordan, should get her coated

[Jordan Kruger]

Cool beans!   ported or aftermarket for your build.  Its getting pretty serious   

As far as coating goes.  I need a guarantee that the coating will drop the temperature dramatically.
I hear that the only tried tested and true coating is offered by swaintech. And its white   
I would rather a clear coating if anything. If it doesnt come clear, ide like black or something dark.
Im just having my doubts about coating.  I might just end up wrapping.   

It all boils down to what Im able to apply to the manifold without voiding the warranty.
And if im able to find a coating that will drop temperatures dramatically.

Cant get a hold of Sheela either.

[Robert Vorley]

Cool beans!   ported or aftermarket for your build.  Its getting pretty serious   

Yeah, what ever happened to,

am happy with anything 350+

Fell into the DSM quicksand and just need a little more power to get out?

[Jordan Kruger]

haha 

Were going to own mission next season.   

 As far as coating goes,  its a toss up between Swaintech and Fireball performance coatings in Ontario.

Reason being,   Fireball messaged me with claims of 60%-70% drop in radiant heat from the manifold once coated with their XMC coating.
They also offer a coating on the inside of turbo manifolds. Apparently allowing 8% more CFM to flow through the manifold once coated.

Interesting stuff.
Swaintech doesnt offer an internal coating and their best thermal coating is called white lightning...   which is white 

Might go swaintech if its paintable...