Porsche Killer Build

roplusbee · 05-25-2016, 01:07 PM

That sounds interesting. I am curious as to why other manufacturer's do not have similar issues with regard to cracking. The GTM manifolds are cast iron or something else?

Chuck33079 · 05-25-2016, 01:18 PM

Quote:

Originally Posted by roplusbee

That sounds interesting. I am curious as to why other manufacturer's do not have similar issues with regard to cracking. The GTM manifolds are cast iron or something else?

They're cast iron. It's probably just a shitty casting process. OEMs have used cast manifolds for decades without major issues. Also, there's no support for the turbos on the GTM kit. The manifold holds all the weight.

EVOHUNTER · 05-25-2016, 01:23 PM

Quote:

Originally Posted by Chuck33079

They're cast iron. It's probably just a shitty casting process. OEMs have used cast manifolds for decades without major issues. Also, there's no support for the turbos on the GTM kit. The manifold holds all the weight.

I forgot to mention this, we made 2 brackets out of flat bar steel for the turbos, these brackets where bolted to the block.

Now the block, manifold and turbo all move as one when the engine sways.

The flex pipe takes the stress now.

I can get you some pics if you want Charles.

Chuck33079 · 05-25-2016, 01:26 PM

Quote:

Originally Posted by EVOHUNTER

I forgot to mention this, we made 2 brackets out of flat bar steel for the turbos, these brackets where bolted to the block.

Now the block, manifold and turbo all move as one when the engine sways.

The flex pipe takes the stress now.

I can get you some pics if you want Charles.

That would be great. I'll bet the turbo supports made a big difference.

Masterbeatty · 05-25-2016, 01:38 PM

Quote:

Originally Posted by roplusbee

That sounds interesting. I am curious as to why other manufacturer's do not have similar issues with regard to cracking. The GTM manifolds are cast iron or something else?

Their metallurgy is most likely different and the design/ production method is different too.

05-25-2016, 01:07 PM	#1 (permalink)
roplusbee A True Z Fanatic Join Date: Dec 2009 Location: Killeen, TX Posts: 2,360 Drives: 2007 350Z NISMO Rep Power: 23	That sounds interesting. I am curious as to why other manufacturer's do not have similar issues with regard to cracking. The GTM manifolds are cast iron or something else? __________________ 2007 350Z NISMO #0618: Zerolift \| UPREV \| F.I. \| Greddy \| Competition Clutch \| Injector Dynamics \| Aeromotive \| Pioneer \| JL

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