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R33Gtr Vs R34Gtr Turbo Manifold Difference?

drag-on silvia

By drag-on silvia,
in Engines & Forced Induction

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drag-on silvia Rising Star

drag-on silvia

Posted
Posted

hey guys, long version of the story is,

i am about to upgrade the turbos on my 34 gtr to -5's and i am interested in having the exhaust manifolds port matched, extrude honed and ceramic coated. having said that i would like to have it all there and ready to swap over when i do it. question is, i have access to a pair of r33gtr turbo manifolds so was going to get them modified if there were the same and then just swap them over. if not i will just source a pair of 34's from somewhere but if they are the same it will save me some money and time.

cheers adam

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

i have access to a pair of r33gtr turbo manifolds so was going to get them modified if there were the same and then just swap them over.

To answer the question - Same mate.

Go and get 33 ones sorted out :thumbsup:

Moodles2 Grand Master

Moodles2

Posted
Posted

From what people who have done back to back dyno testing with a stock manifold vs ported manifold I've spoken to, have said they've lost response getting rid of the lip (porting) because exhaust velocity was reduced, whereas keeping the lip does act as a restriction when your power target is beyond the 350kw mark. Some workshops have confirmed this when I've contacted them, they even recommend keeping the stock manifolds as they are for -9 (GT-SS) & -7 (N1) turbos for response.

Piggaz Grand Master

Piggaz

Posted
Posted

How about stock vs ported on -10s going for over 400kw? Would getting it all ceramic coated help with boost threshold?

Don't need -10's for over 400. Sort your setup out and have some "response" under 5500.

wedge_r34gtr Mentor

wedge_r34gtr

Posted
Posted (edited)

From what people who have done back to back dyno testing with a stock manifold vs ported manifold I've spoken to, have said they've lost response getting rid of the lip (porting) because exhaust velocity was reduced, whereas keeping the lip does act as a restriction when your power target is beyond the 350kw mark. Some workshops have confirmed this when I've contacted them, they even recommend keeping the stock manifolds as they are for -9 (GT-SS) & -7 (N1) turbos for response.

I agree with this, but it should be noted that Nissan supplied an essential ported manifold for N1 engines (r34 at least anyways)..which may indicate they started seeing restriction at much lower power levels.

manifoldoutlets.jpg

Edited by wedge_r34gtr
  • 2 months later...
drag-on silvia Rising Star

drag-on silvia

Posted
  • Author
Posted

Ok, to extend on this.

I have recieved my turbos and the manifolds too. Just waiting on my hpi dumps before sending them all away to be coated. My question now is, i initially was going to get unique autosport to extrude hone and port match them. Is there someone else i should go through or are they the goods when it comes to this. In their advert they say they port them to the gaskets but is there really any need to go bigger than the turbo flange? I have no intention of porting the turbo housings.

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