Switching Turbos, tune OK? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

QuickSpoolSR · 12-17-2013, 11:46 AM

So I am switching from a Tomei m7960 to a garret gtx2867.

My question: how far will my tune be off. I am not changing anything elese:

s14sr20det
bc 264/264 cams
750cc inj
z32 maf

what should I expect to be off about the tune?

I am trying to hold off getting it redone right now because I want to do the e85 switch but I need to get a few more things lined up first.

koukistylejdm · 12-17-2013, 12:07 PM

it shouldnt change anything... you may want to lower the boost a pound or 2 just to make sure or just pay attention to your wideband first time you rip it

240sxfan6882 · 12-17-2013, 12:22 PM

It won't be "off" really.
The MAF will compensate the change of air difference from the new turbo.
However, a re-tune for that turbo will most likely optimize the power curve for it's given size.

I went from a t3/t4 on my KA24DE to a GTX2867r and there's no difference in the way the car drives on an enthalpy tune.

QuickSpoolSR · 12-17-2013, 01:33 PM

wow that is Awesome news, thanks for the info!

jr_ss · 12-17-2013, 05:24 PM

Get it retuned, why risk it?

Z28ricer · 12-17-2013, 08:11 PM

Quote:

Originally Posted by jr_ss

Get it retuned, why risk it?

Because there isn't much risk if any at all, a 2867 vs a 20G (68mm exducer), sure going from a GT2560 -> 2871 big difference, but here the two turbos are very close to each other.

12-17-2013, 11:46 AM	#1
QuickSpoolSR Zilvia Addict Join Date: Jul 2008 Location: des moines IA Age: 37 Posts: 756 Trader Rating: (8) Feedback Score: 8 reviews	Switching Turbos, tune OK? So I am switching from a Tomei m7960 to a garret gtx2867. My question: how far will my tune be off. I am not changing anything elese: s14sr20det bc 264/264 cams 750cc inj z32 maf what should I expect to be off about the tune? I am trying to hold off getting it redone right now because I want to do the e85 switch but I need to get a few more things lined up first. __________________

12-17-2013, 01:33 PM	#4
QuickSpoolSR Zilvia Addict Join Date: Jul 2008 Location: des moines IA Age: 37 Posts: 756 Trader Rating: (8) Feedback Score: 8 reviews	wow that is Awesome news, thanks for the info! __________________

12-17-2013, 05:24 PM	#5
jr_ss Post Whore! Join Date: Dec 2005 Location: Pa Posts: 6,415 Trader Rating: (35) Feedback Score: 35 reviews	Get it retuned, why risk it? __________________ My SR20VET Does your VTC gear rattle in your S14/15 SR? PM me.

12-17-2013, 12:07 PM	#2
koukistylejdm Zilvia Member Join Date: May 2009 Location: Baie-comeau Qc Age: 38 Posts: 256 Trader Rating: (2) Feedback Score: 2 reviews	it shouldnt change anything... you may want to lower the boost a pound or 2 just to make sure or just pay attention to your wideband first time you rip it

12-17-2013, 12:22 PM	#3
240sxfan6882 Zilvia Junkie Join Date: Nov 2004 Location: Los Angeles Posts: 300 Trader Rating: (6) Feedback Score: 6 reviews	It won't be "off" really. The MAF will compensate the change of air difference from the new turbo. However, a re-tune for that turbo will most likely optimize the power curve for it's given size. I went from a t3/t4 on my KA24DE to a GTX2867r and there's no difference in the way the car drives on an enthalpy tune.