Going from HKS Hi Power to GTM 3", what to expect?

Footloose301 · 08-28-2011, 07:40 PM

Quick question:

I'm prepping for my stage 2 GTM TT kit that I'll be ordering in the coming months and thinking I should ditch the HKS for a 3" GTM exhaust.

I just got tuned two weeks ago, would it require a retune and how much power do you suppose I would lose?

buddahson · 08-28-2011, 07:54 PM

I'd wait until you order the TT kit. You will need a retune if you hope to minimize power loss but will likely still lose a bit even with the tune. Its just too free flowing for a NA Z. I'm certainly not an expert so this is more of an educated guess.

daisuke149 · 08-28-2011, 09:21 PM

you wont need a retune. get it now if you find a deal, otherwise no harm in waiting tbh

MattP725 · 09-01-2011, 02:45 PM

Tune won't really change much since it is on the tail end (literally). You'll lose some torque until you go FI.

christian370z · 09-01-2011, 03:35 PM

^That's correct, you will lose some torque but likely won't lose much horsepower. I too would wait for your FI installation.

08-28-2011, 07:40 PM	#1 (permalink)
Footloose301 A True Z Fanatic Join Date: Apr 2010 Location: Naples, FL Posts: 2,659 Drives: 40th Rep Power: 21	Going from HKS Hi Power to GTM 3", what to expect? Quick question: I'm prepping for my stage 2 GTM TT kit that I'll be ordering in the coming months and thinking I should ditch the HKS for a 3" GTM exhaust. I just got tuned two weeks ago, would it require a retune and how much power do you suppose I would lose? __________________ 2010 40th Anniversary 370Z

08-28-2011, 07:54 PM	#2 (permalink)
buddahson Enthusiast Member Join Date: Jul 2009 Location: Boulder, CO Posts: 272 Drives: 09 370z, 07 R6 Rep Power: 15	I'd wait until you order the TT kit. You will need a retune if you hope to minimize power loss but will likely still lose a bit even with the tune. Its just too free flowing for a NA Z. I'm certainly not an expert so this is more of an educated guess. __________________ Thanks for the sig EazyD.

09-01-2011, 03:35 PM	#5 (permalink)
christian370z A True Z Fanatic Join Date: Jul 2010 Location: Newport Beach Posts: 3,900 Drives: 2010 370Z/Saab 900se Rep Power: 431	^That's correct, you will lose some torque but likely won't lose much horsepower. I too would wait for your FI installation. __________________ -320whp / 259wftlbs- SP Rays -- RE-11s -- SpecialtyZ Tune -- Swift Springs -- Stillen 25R Oil Cooler -- Stillen G3 Intakes -- Berk HFCs -- F.I. 12" CBE -- Stillen Sway Bars -- Es14 Spring -- INGS+1 lip -- CF Spoiler -- GTR Start Button -- VLED Parking Lights -- PWJDM V2 shift knob

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Nissan 370z "SPORT" Stop Tech Power Slot Rotor Blow Out Sale	Tunerz_Store	Suspension/Brakes	490	05-03-2018 10:07 AM
FS- More oil!!! Motul 300V 5W30 "power racing"	SE	Parts for sale (Private Classifieds)	5	05-09-2010 07:50 PM
What does it mean by "Rep Power"?	avitech	Introduction	25	11-30-2009 10:01 PM
What we can expect from the 370Z	bboypuertoroc	Engine & Drivetrain	41	02-09-2009 01:07 PM
Japanese "power ranger" 370Z from TAS? 01.20.09	AK370Z	Nissan 370Z Photos / Spyshots / Video / Media Gallery	5	01-22-2009 02:29 PM

08-28-2011, 09:21 PM	#3 (permalink)
daisuke149 My *** is famous! Join Date: Mar 2010 Location: Alpharetta, GA Posts: 4,849 Drives: 2013 Boss 302 PW Rep Power: 31	you wont need a retune. get it now if you find a deal, otherwise no harm in waiting tbh

09-01-2011, 02:45 PM	#4 (permalink)
MattP725 A True Z Fanatic Join Date: May 2011 Location: Toms River, NJ Posts: 1,904 Drives: 2010 40th Rep Power: 16	Tune won't really change much since it is on the tail end (literally). You'll lose some torque until you go FI.