Few tuning questions - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

Jim27 · 29th October 2005, 03:51 PM

1.3 bar
HKS 264/264 cams
A'PEXi super intake thingjobwhatsit air filters
Large bore (4") decat Invidia exhaust (one silencer in center section and 5" backbox)
HKS downpipes
Power FC
PFC Boost control kit
550cc Nismo injectors
HKS GT-SS turbos

That's the basic spec of my GTR32 at the mo (ignoring the supporting mods like hard pipe kit, uprated intercooler, etc. etc. as these don't affect power) - just thought I'd get that stated before asking my questions:

1) Would you class 264/264 HKS cams as "lumpy"? My idle is atrocious, with it wobbling from 850 up to 1200ish.

2) Talking about "lumpy cams", can someone please clarify the difference between "lumpy cams" and "erratic idle"? Any links to audio/video clips that help make the difference obvious would be great

3) Would you consider the above spec pretty safe to aim for 500bhp? Or is 500bhp just about the absolute limit?

Jim

drewby · 29th October 2005, 05:32 PM

well that lot should give you around 525 hp may bo more

.D

R32 Combat · 29th October 2005, 05:46 PM

What AFM's are you running?

I run 272 cams using only the ignition timing to control the idle speed and at 1000rpm they're not lumpy. Is you PFC set correctly?

What reading are you using for the 4 idle speeds?

smileyculture · 29th October 2005, 06:05 PM

According to the hks website,gtss turbos,264 cams,fuelling and ecu etc you should get 574bhp at 1.4bar,but how accurate their power claims are i dont know.

jase

Jim27 · 29th October 2005, 10:52 PM

Well, the old girl's running like a dog at the moment so a check up is in order. AFAIK it's on standard AFMs.

gtr mart · 30th October 2005, 08:13 AM

on standard afms and fuelling you will struggle past 450bhp

I think the power fc has an idle control thing that you need to set up when the unit is first fired up.

Perhaps this needs doing.

Jim27 · 30th October 2005, 03:19 PM

Possibly. I've got a Bosch 044 in-tank fuel pump to fit and some new A'PECi filters on order so will get those sorted and then have a word with a 'chooner'

The engine & kit came from an R33 (a very nice one, eh Matty?

) which had received the Middlehurst 500bhp upgrade so I also have whatever AFMs were fitted to that in the attic as well at the mo. Maybe I should have a look at them as well...

matt j · 30th October 2005, 03:33 PM

Quote:

Originally Posted by Jim27

The engine & kit came from an R33 (a very nice one, eh Matty?

) which had received the Middlehurst 500bhp upgrade so I also have whatever AFMs were fitted to that in the attic as well at the mo. Maybe I should have a look at them as well...

Car looks a little different now though Jim

Pitty you weren't at Abbey yesterday, car was there on show.

AFM's on that engine were still standard ones, but had the full HKS piping kit.

M.

Nick MW · 30th October 2005, 03:35 PM

Quote:

Originally Posted by matt j

Car looks a little different now though Jim

Pitty you weren't at Abbey yesterday, car was there on show.

Looks absolutely stunning Matt

Possibly the nicest 33 I have seen.

Jim - may have a pair of Z32 AFMs off my car shortly if you are interested.

matt j · 30th October 2005, 03:38 PM

Quote:

Originally Posted by Nick MW

Looks absolutely stunning Matt

Possibly the nicest 33 I have seen.

Cheers Nick, Can't wait til it's finished now.
Scott kindly took me out for a drive yesterday whilst it's still being run in.
I've got a load of pics of the build process and will post them up when it's finished.

Matt.

matt j · 30th October 2005, 03:39 PM

Sorry for the Hijack Jim...

Jim27 · 30th October 2005, 04:26 PM

No probs matey

Dunno if I need Z32 AFMs for 500bhp? If Middlehurst didn't fit em as part of the conversion then maybe I just need to spend my pennies getting the PFC looked at and sort out the map/idle/det issues...?

I can hear my conscience telling me to save my money for the wedding next year, and here I am surfing for various ways to spend lots of cash on my car! I am SOOOOO gonna get a slap off the missus if she ever reads this thread

Bajie · 30th October 2005, 04:34 PM

At least she hasn't asked you if its time to sell it ....

gtr mart · 31st October 2005, 07:51 AM

I just got married - havent been able to afford to properly drive my car since July......

Standard AFMS max out at about 450 apparently, so 500 is unlikely to be acheivable.

Pikey · 31st October 2005, 10:20 AM

Thats the info I had aswell, but not sure if its another urban Skyline myth that people just follow because it was posted on the internet once. You know, like '720cc injectors wont fit in a standard fuel rail', or 'you need a hard pipe kit' or 'you need a metal head gasket to run over 1.2bar of boost' - stuff like that.

29th October 2005, 03:51 PM	#1 (permalink)
Jim27 GTR Register Member Join Date: Jul 2004 Location: Bolton Posts: 4,478	Few tuning questions 1.3 bar HKS 264/264 cams A'PEXi super intake thingjobwhatsit air filters Large bore (4") decat Invidia exhaust (one silencer in center section and 5" backbox) HKS downpipes Power FC PFC Boost control kit 550cc Nismo injectors HKS GT-SS turbos That's the basic spec of my GTR32 at the mo (ignoring the supporting mods like hard pipe kit, uprated intercooler, etc. etc. as these don't affect power) - just thought I'd get that stated before asking my questions: 1) Would you class 264/264 HKS cams as "lumpy"? My idle is atrocious, with it wobbling from 850 up to 1200ish. 2) Talking about "lumpy cams", can someone please clarify the difference between "lumpy cams" and "erratic idle"? Any links to audio/video clips that help make the difference obvious would be great 3) Would you consider the above spec pretty safe to aim for 500bhp? Or is 500bhp just about the absolute limit? Jim

29th October 2005, 05:32 PM	#2 (permalink)
drewby GTR Register Member Join Date: Jan 2004 Location: sheffield Posts: 587	hp well that lot should give you around 525 hp may bo more .D

30th October 2005, 04:34 PM	#13 (permalink)
Bajie Banned Join Date: Dec 2001 Location: London Posts: 3,698	At least she hasn't asked you if its time to sell it .... __________________ Kakimoto Exhaust for Sale tulibu dibu douchoo 360 spinner at Spa Jaffa survived a trackday with me MX5 VR limited Combination A RK500 with Serious Performance バジエアールケイ五百＝　セリウズ　パフォーマンス

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29th October 2005, 05:46 PM	#3 (permalink)
R32 Combat New Users Join Date: Jan 2004 Location: Berkshire Posts: 4,357	What AFM's are you running? I run 272 cams using only the ignition timing to control the idle speed and at 1000rpm they're not lumpy. Is you PFC set correctly? What reading are you using for the 4 idle speeds?

29th October 2005, 06:05 PM	#4 (permalink)
smileyculture GTROC Member Join Date: Oct 2003 Location: Barnsley Posts: 203	According to the hks website,gtss turbos,264 cams,fuelling and ecu etc you should get 574bhp at 1.4bar,but how accurate their power claims are i dont know. jase

29th October 2005, 10:52 PM	#5 (permalink)
Jim27 GTR Register Member Join Date: Jul 2004 Location: Bolton Posts: 4,478	Well, the old girl's running like a dog at the moment so a check up is in order. AFAIK it's on standard AFMs.

30th October 2005, 08:13 AM	#6 (permalink)
gtr mart GTR Register Member Join Date: Mar 2004 Posts: 1,637	on standard afms and fuelling you will struggle past 450bhp I think the power fc has an idle control thing that you need to set up when the unit is first fired up. Perhaps this needs doing.

30th October 2005, 03:19 PM	#7 (permalink)
Jim27 GTR Register Member Join Date: Jul 2004 Location: Bolton Posts: 4,478	Possibly. I've got a Bosch 044 in-tank fuel pump to fit and some new A'PECi filters on order so will get those sorted and then have a word with a 'chooner' The engine & kit came from an R33 (a very nice one, eh Matty? ) which had received the Middlehurst 500bhp upgrade so I also have whatever AFMs were fitted to that in the attic as well at the mo. Maybe I should have a look at them as well...

30th October 2005, 03:39 PM	#11 (permalink)
matt j GTROC 011 Join Date: Oct 2001 Location: Right here! Posts: 2,126	Sorry for the Hijack Jim...

30th October 2005, 04:26 PM	#12 (permalink)
Jim27 GTR Register Member Join Date: Jul 2004 Location: Bolton Posts: 4,478	No probs matey Dunno if I need Z32 AFMs for 500bhp? If Middlehurst didn't fit em as part of the conversion then maybe I just need to spend my pennies getting the PFC looked at and sort out the map/idle/det issues...? I can hear my conscience telling me to save my money for the wedding next year, and here I am surfing for various ways to spend lots of cash on my car! I am SOOOOO gonna get a slap off the missus if she ever reads this thread

31st October 2005, 07:51 AM	#14 (permalink)
gtr mart GTR Register Member Join Date: Mar 2004 Posts: 1,637	I just got married - havent been able to afford to properly drive my car since July...... Standard AFMS max out at about 450 apparently, so 500 is unlikely to be acheivable.

31st October 2005, 10:20 AM	#15 (permalink)
Pikey GTR Register Member Join Date: Feb 2004 Location: Cheltenham Posts: 4,151	Thats the info I had aswell, but not sure if its another urban Skyline myth that people just follow because it was posted on the internet once. You know, like '720cc injectors wont fit in a standard fuel rail', or 'you need a hard pipe kit' or 'you need a metal head gasket to run over 1.2bar of boost' - stuff like that.