R33Gtr Vs R34Gtr Turbo Manifold Difference?

[drag-on silvia]

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

[hypergear]

You mean porting from

Stock GTR manifolds:

To:

will kill response. for around 300rwkws you might want to keep them stock.

[R31Nismoid]

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

[drag-on silvia]

Going for 400kw so trying to make everything as efficient as possible.

I know I'll prolly struggle on a 2.6 with -5's but gonna have a good go at it.

Thanks for your help guys

[drag-on silvia]

Going for 400kw so trying to make everything as efficient as possible.

I know I'll prolly struggle on a 2.6 with -5's but gonna have a good go at it.

Thanks for your help guys

[SS8_Gohan]

Stao: lose response from porting manifold? really? haven't really heard of that side-effect...

[Serpandrew]

My guess is it'll lose velocity as more gas has to flow through to fill up the manifold before it turns the exhaust turbine

[Moodles2]

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.

[SS8_Gohan]

ahhhh interesting - thanks for that.

[Griffin]

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

[Piggaz]

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.

[R31Nismoid]

-10s - ba bow.... Walk away from those.

[Piggaz]

-10s - ba bow.... Walk away from those.

Lol.

[GTR_JOEY]

Please dont get them started on -10s or GT-RS turbos

[r32-25t]

Yeah just read my signature lol

[wedge_r34gtr]

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.

Edited December 2, 2012 by wedge_r34gtr

[drag-on silvia]

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.

[drag-on silvia]

Ok, and unique no longer do it. Anyone know who does extrude honing of turbo manifolds?

[KING87]

CRD but not cheap.

[drag-on silvia]

Yeah spoke to crd who said they could port them. They did want a fair bit more than uas. Is there anyone else who can extrude hone them and port match them?