2.8 liter and GT-RS Turbos - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

tyndago · 7th October 2008, 06:30 PM

2.8 liter engine , GT-RS Turbos.

Nissan Skyline GT-R s in the USA Blog: Turbolag - 2.8 liter , GT-RS Turbos

C16 race fuel - 26/27 psi.

The turbos are HKS GT-RS with strengthened actuators set at 16 psi base. The twin turbo pipe looks polished but its actually got a splitter/divider in it. The airbox looks stock, but it has an extra air feed going to it. Exhaust manifolds are N1's. Exhaust outlets are Nismo cast outlets. Exhaust is all titanium. Camshafts are fairly small. 9.1 mm and 8.9 mm of lift. 272 / 264 duration. +4 on the intake cam , 0 on the exhaust cam. The head has been ported and modified by Jeff of RB Motorsports. Hard piping. Nismo collector. Stock throttle bodies. ARC intercooler. HKS Racing BOV. Engine management is AEM with 24-1 CAS wheel. NGK #9 Racing plugs. Stock "new" coils. Stock "new" coil harness. 1000 cc injectors. Two Bosch 044 pumps in the tank. Twin -8 feeds.

GT-R Glenn · 7th October 2008, 09:52 PM

I like the white one and the blue one ...
Hey Sean, do you have "the idiots guide to multiply graphing of dyno curves" ??

Piggaz · 8th October 2008, 06:22 AM

I have this setup and its great. Although the cams are 270 @ 10.25mm. Putting a Nismo plenum on at the moment (what a prick of a job). Will post results when I get a retune!

johnny_0 · 8th October 2008, 10:31 AM

Is the RB's head standard comes with stock valves, etc, or not?
Thks

tyndago · 8th October 2008, 04:00 PM

Quote:

Originally Posted by GT-R Glenn

I like the white one and the blue one ...
Hey Sean, do you have "the idiots guide to multiply graphing of dyno curves" ??

Its a Dynapack dyno. No correction. Was about 80 F that day. Those numbers are all done by eye, so they aren't perfect, I have the real dyno chart, but I didn't up load them yet.

tyndago · 8th October 2008, 04:10 PM

Quote:

Originally Posted by johnny_0

Is the RB's head standard comes with stock valves, etc, or not?
Thks

This was just standard stock valves. The only real weirdness is a couple of extra vents for air within the cooling passages. Oil drainback in the head.

tyndago · 8th October 2008, 04:16 PM

Quote:

Originally Posted by Piggaz

I have this setup and its great. Although the cams are 270 @ 10.25mm. Putting a Nismo plenum on at the moment (what a prick of a job). Will post results when I get a retune!

I don't think you will see much difference. Its really just made to help balance flow though the engine.

Piggaz · 9th October 2008, 06:41 AM

^^
Becasue the air is better balanced between each cylinder, you dont think I could have a slightly more aggressive tune becasue there isnt a cylinder or 2 knocking before the others? Run a degree or 2 more timing perhaps?

tyndago · 9th October 2008, 03:53 PM

Quote:

Originally Posted by Piggaz

^^
Becasue the air is better balanced between each cylinder, you dont think I could have a slightly more aggressive tune becasue there isnt a cylinder or 2 knocking before the others? Run a degree or 2 more timing perhaps?

#6 is the lean hole. #6 is normally where I see problems. Yes it might be possible to be more aggressive with the timing. How much of a real difference that is, depends on how hard and how on edge you are already.

I think the Nismo plenum looks pretty. The idea is good.

kismetcapitan · 9th October 2008, 09:52 PM

a couple things...

I wonder why Nismo rates their plenum "up to" 600bhp.

The divider in the twin turbo pipe...do you think that keeps the surge monster at bay? I think I may try that mod - I can't seem to be able to get my hands on a Y-pipe anyways, plus looking as stock as possible has its benefits in, uh, certain situations

Piggaz · 10th October 2008, 06:07 AM

Toby, I have the twin turbo pipe mod on my car and it shuffles a little bit. When it does its not like im lacking power, it just makes a choofing noise. Give it a go. Tyndago posted a thread about a back to back comparison between a stock and a modified twin turbo pipe. From what i can remember it was worth a significant amount of horses.

Piggaz · 10th October 2008, 06:13 AM

http://http://www.gtr.co.uk/forum/84...urbo-pipe.html
Here it is. Looks like you have read it already

kismetcapitan · 10th October 2008, 07:45 AM

yep, snagged the pics already and showed them to my builder today

tokes · 10th October 2008, 12:35 PM

What do you do to throw the dual bosch's inside the stock tank? I'd love this setup instead of a surge tank, keep the trunk a bit cleaner.

kismetcapitan · 10th October 2008, 01:40 PM

I had a bracket made from aluminum billet, and modified (hacked away at) the stock pump cradle to hold the aluminum block bolted around the pumps. Hooked up the wires and hoses and it was all good to go!

7th October 2008, 06:30 PM	#1 (permalink)
tyndago GTR Register Member Join Date: Oct 2002 Location: LBC , CA Posts: 2,231	2.8 liter and GT-RS Turbos 2.8 liter engine , GT-RS Turbos. Nissan Skyline GT-R s in the USA Blog: Turbolag - 2.8 liter , GT-RS Turbos C16 race fuel - 26/27 psi. The turbos are HKS GT-RS with strengthened actuators set at 16 psi base. The twin turbo pipe looks polished but its actually got a splitter/divider in it. The airbox looks stock, but it has an extra air feed going to it. Exhaust manifolds are N1's. Exhaust outlets are Nismo cast outlets. Exhaust is all titanium. Camshafts are fairly small. 9.1 mm and 8.9 mm of lift. 272 / 264 duration. +4 on the intake cam , 0 on the exhaust cam. The head has been ported and modified by Jeff of RB Motorsports. Hard piping. Nismo collector. Stock throttle bodies. ARC intercooler. HKS Racing BOV. Engine management is AEM with 24-1 CAS wheel. NGK #9 Racing plugs. Stock "new" coils. Stock "new" coil harness. 1000 cc injectors. Two Bosch 044 pumps in the tank. Twin -8 feeds.

8th October 2008, 10:31 AM	#4 (permalink)
johnny_0 GTR Register Member Join Date: Dec 2003 Location: Novara - Italy Posts: 251	Is the RB's head standard comes with stock valves, etc, or not? Thks Last edited by johnny_0; 8th October 2008 at 10:35 AM.

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7th October 2008, 09:52 PM	#2 (permalink)
GT-R Glenn GTR Register Member Join Date: Nov 2002 Location: Waiuku NZ Posts: 1,170	I like the white one and the blue one ... Hey Sean, do you have "the idiots guide to multiply graphing of dyno curves" ??

8th October 2008, 06:22 AM	#3 (permalink)
Piggaz GTR Register Member Join Date: Sep 2002 Location: Sydney, Australia Posts: 747	I have this setup and its great. Although the cams are 270 @ 10.25mm. Putting a Nismo plenum on at the moment (what a prick of a job). Will post results when I get a retune!

9th October 2008, 06:41 AM	#8 (permalink)
Piggaz GTR Register Member Join Date: Sep 2002 Location: Sydney, Australia Posts: 747	^^ Becasue the air is better balanced between each cylinder, you dont think I could have a slightly more aggressive tune becasue there isnt a cylinder or 2 knocking before the others? Run a degree or 2 more timing perhaps?

9th October 2008, 09:52 PM	#10 (permalink)
kismetcapitan GTR Register Member Join Date: Nov 2005 Location: Seoul Korea Posts: 6,300	a couple things... I wonder why Nismo rates their plenum "up to" 600bhp. The divider in the twin turbo pipe...do you think that keeps the surge monster at bay? I think I may try that mod - I can't seem to be able to get my hands on a Y-pipe anyways, plus looking as stock as possible has its benefits in, uh, certain situations

10th October 2008, 06:07 AM	#11 (permalink)
Piggaz GTR Register Member Join Date: Sep 2002 Location: Sydney, Australia Posts: 747	Toby, I have the twin turbo pipe mod on my car and it shuffles a little bit. When it does its not like im lacking power, it just makes a choofing noise. Give it a go. Tyndago posted a thread about a back to back comparison between a stock and a modified twin turbo pipe. From what i can remember it was worth a significant amount of horses.

10th October 2008, 06:13 AM	#12 (permalink)
Piggaz GTR Register Member Join Date: Sep 2002 Location: Sydney, Australia Posts: 747	http://http://www.gtr.co.uk/forum/84...urbo-pipe.html Here it is. Looks like you have read it already

10th October 2008, 07:45 AM	#13 (permalink)
kismetcapitan GTR Register Member Join Date: Nov 2005 Location: Seoul Korea Posts: 6,300	yep, snagged the pics already and showed them to my builder today

10th October 2008, 12:35 PM	#14 (permalink)
tokes GTR Register Member Join Date: Jul 2006 Location: Canada Posts: 314	What do you do to throw the dual bosch's inside the stock tank? I'd love this setup instead of a surge tank, keep the trunk a bit cleaner.

10th October 2008, 01:40 PM	#15 (permalink)
kismetcapitan GTR Register Member Join Date: Nov 2005 Location: Seoul Korea Posts: 6,300	I had a bracket made from aluminum billet, and modified (hacked away at) the stock pump cradle to hold the aluminum block bolted around the pumps. Hooked up the wires and hoses and it was all good to go!