Rb28 Build

[Dose Pipe Sutututu]

^depends if the car is mainly street/track etc.

I personally (if I had a GT-R) get a 1-way or helical front and a 1.5way rear

[sneakey pete]

Most people here would recommend the Quaife front diff over the nismo, as its a helical type diff instead of mechanical plates, helps with understeer under load. Also my diff guy doesn't like to install mechanical fronts as too much of the diff housing needs to be ground down to make them fit apparently

Additionally, note that for the gtx turbos, they aren't a bolt in affair, to get mine i needed to find a rear housing to suit and then get a front housing machined. As was mentioned in the first page, you should probably be able to get a turbo shop to do that using tx 2863's into your existing turbo housings. why not 2860's? because you cant machine something to be smaller than it already is.

[levinboy]

  On 06/04/2016 at 4:07 AM, Dose Pipe Sutututu said:

You mean you'll get more lag and shift the mid range higher up the RPM..

Longer duration cams are not the answer to getting better response or making better mid range.. Yes you will make more torque yes you'll make more power but not where you want it.. and that's nice and early.

I have 272 by 10.8 cams on a 2.6 with -9 turbos and have full boost 21psi by 3800rpm on 98

[Dose Pipe Sutututu]

  On 08/04/2016 at 2:58 AM, levinboy said:

I have 272 by 10.8 cams on a 2.6 with -9 turbos and have full boost 21psi by 3800rpm on 98

put some smaller cams in you will get even better response.. and welcome back lol.. you went missing for a while

[HarrisRacing]

  On 08/04/2016 at 1:33 AM, sneakey pete said:

Most people here would recommend the Quaife front diff over the nismo, as its a helical type diff instead of mechanical plates, helps with understeer under load. Also my diff guy doesn't like to install mechanical fronts as too much of the diff housing needs to be ground down to make them fit apparently

Additionally, note that for the gtx turbos, they aren't a bolt in affair, to get mine i needed to find a rear housing to suit and then get a front housing machined. As was mentioned in the first page, you should probably be able to get a turbo shop to do that using tx 2863's into your existing turbo housings. why not 2860's? because you cant machine something to be smaller than it already is.

Check my build thread for very detailed Nismo install instructions including highlighted areas where to grind. It was not significant by any means.

Regarding the clutch diff vs helical...I think the nismo 1.5 instructions references that it is a lightly set clutch style...not crazy deceleration lockup (but I haven't driven mine yet). I'll let you know when I drive it.

I would also have chosen quaife but I would have had to become a dealer in the USA and buy 10 of them to get one!

Also nismo came with the bearings and seals. I don't think other ones do. (Tomei, quaife, etc).

Also don't forget you will be buying / ordering shims. The setup took a bit of time for me. I had to make 2 shims.

[khezz]

So there seems to be a general agreement on diffs. thats was easy.

still seems to be no agreement on turbos.

what about the hks gtss or the gtrs?

[Piggaz]

They're polar opposites

You do not want RS's/2871's/-10's.

The graph that I posted earlier shows why.

GT SS's are a -9. A little small for a 2.8.

[Hattori Hanzo 69]

if you are in Perth go see Josh @ Galvsport, has got several single high mount R32 GTRs Engineered with A Class Rego

[khezz]

I always thought that engineering reports cost a fortune

[KiwiRS4T]

  On 10/04/2016 at 4:50 AM, khezz said:

I always thought that engineering reports cost a fortune

They cost around $500 in NZ. Don't wonder...ring up and ask.

[khezz]

Ok new plan. If it does turn out that a high mount single can be made legal, what will support 600AWHP without lag that can be marked on a calendar?

Edited April 10, 2016 by khezz

[XKLABA]

EFR8374 ftw

[khezz]

  On 10/04/2016 at 6:11 AM, XKLABA said:

EFR8374 ftw

I'm no expert on turbo flow charts but it looks like it will come up just shy of my goal. Sounds like an awesome product though.

[XGTRX]

  On 10/04/2016 at 5:47 AM, khezz said:

600AWHP without lag

[emoji57]

[Piggaz]

  On 10/04/2016 at 8:36 AM, khezz said:

I'm no expert on turbo flow charts but it looks like it will come up just shy of my goal. Sounds like an awesome product though.

Unopened 2.6 went 470 kW

Built 2.6 went 490 kW.

600 whp isn't an issue.

[khezz]

  On 10/04/2016 at 8:43 AM, XGTRX said:

[emoji57]

I understand there will be lag, but there is acceptable lag and a dyno graph that looks like a cliff face. Nothing and everything for a split second.

[khezz]

  On 10/04/2016 at 8:56 AM, Piggaz said:

Unopened 2.6 went 470 kW

Built 2.6 went 490 kW.

600 whp isn't an issue.

I stand corrected. Looks like this might be the turbo for me.

[XGTRX]

  On 10/04/2016 at 9:02 AM, khezz said:

I understand there will be lag, but there is acceptable lag and a dyno graph that looks like a cliff face. Nothing and everything for a split second.

Dynos gives u info in one gear and WOT.

On the street you never load up 4th at 2000 rpm at WOT and wait for boost. Real world is different to a dyno.

[HarrisRacing]

Also the EFR are literally the fastest responding turbos on the market right now. Geoff at full race made 704whp through the 8374 EFR on a stock bottom 2.6 with lots of headwork on E85 through a cat.

[khezz]

  On 10/04/2016 at 12:05 PM, HarrisRacing said:

Also the EFR are literally the fastest responding turbos on the market right now. Geoff at full race made 704whp through the 8374 EFR on a stock bottom 2.6 with lots of headwork on E85 through a cat.

wow.