Tuning question - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

s13dan · 11-06-2008, 04:04 PM

I need to know a few things because im broke but forced to drive my 240.
The set-up.

retop, #62
FUEL- 370's, walbro255
AIR- GT28rs, KA MAF
misc shiat- FMIC,3in exhaust & stock exhaust mani
and an OLD school SAFC , 5 point adjustable with 30% increments...

So my questions is, do you think I can get a decent A/F ratio with that and using a wideband??? ***I cant run less than 12psi due to the acuator...

Only asking cuz ima broke ass and cant get the necessary parts to get it perfect right now...

tt99ol · 11-06-2008, 04:33 PM

maybe but your timing map will be fubar
might even detonate
just disconnect the wastegate flapper from the actuator
no boost = no issues

mxsx25 · 11-06-2008, 04:40 PM

doubt it w. that alone... if you get an adjustable fpr you MIIIIGGGGGHT be able to squeeze it but its risky... you should replace the 12lb wg with one from a stock turbo..8lbs... and make sure your around 11-11.5 : 1 afr in boost to be safe.. if not...boom boom boom lol

s13dan · 11-06-2008, 05:00 PM

so lets say i get some 550's, then with all the rest i should be safe... right?

GSXRJJordan · 11-06-2008, 05:28 PM

Quote:

Originally Posted by s13dan

so lets say i get some 550's, then with all the rest i should be safe... right?

You'll still be waaaay limited by your KA SOHC maf. 550's and a Z32 MAF (or N60 MAF, which is way cheaper and good to about 300hp) and you're set.

DDSR240 · 11-06-2008, 05:58 PM

Quote:

Originally Posted by s13dan

so lets say i get some 550's, then with all the rest i should be safe... right?

your to broke to fix a waste gate accuator but you can just go out and get some 550's?

GSXRJJordan · 11-06-2008, 06:09 PM

Just so you know, a few of us run 11-12psi on stock redtops with GT28R's... Sileighty did a dyno run and dyno'd some 255whp with A/F's in the safe zone on 12psi IIRC. So you could be good now, but my feeling is that your SOHC KA maf is your weakest link at this point. If you can do the correction using your SAFC, a N60 MAF ($20-$40) would be the best investment to get the most out of the current setup.

s13dan · 11-07-2008, 10:41 AM

I have a Z32 MAF, actually two in my garage but i thought i had to change something in my ECU to allow a Z32Maf to work. I cant just slap it on can I?And if i can scrap some cash up i need to spend it wisely, hence why im asking you guys questions.

Hashiriya415 · 11-07-2008, 11:16 AM

Trade your GT28 it for a S13 S14 or S15 turbo and get cash on top, and your car is gonna be running great.

tt99ol · 11-07-2008, 04:54 PM

Quote:

Originally Posted by Hashiriya415

Trade your GT28 it for a S13 S14 or S15 turbo and get cash on top, and your car is gonna be running great.

probably the best idea so far
get a spec-r turbo and a maf
the spec-r is great
fast spool and decent power
then get injectors later and you should see close to 300whp at 17-18psi
and have response
but i wouldn't tune it with an afc
afc = band-aid
but your cut is gonna need stitches lol
to be safe and have total peace of mind

11-06-2008, 04:04 PM	#1
s13dan Zilvia FREAK! Join Date: Aug 2003 Location: Springfield, Mo Posts: 1,519 Trader Rating: (2) Feedback Score: 2 reviews	Tuning question I need to know a few things because im broke but forced to drive my 240. The set-up. retop, #62 FUEL- 370's, walbro255 AIR- GT28rs, KA MAF misc shiat- FMIC,3in exhaust & stock exhaust mani and an OLD school SAFC , 5 point adjustable with 30% increments... So my questions is, do you think I can get a decent A/F ratio with that and using a wideband??? ***I cant run less than 12psi due to the acuator... Only asking cuz ima broke ass and cant get the necessary parts to get it perfect right now... __________________ 89 240sx hatch #933-the hot rod 91 240sx coupe #131,603-the daily

11-06-2008, 04:33 PM	#2
tt99ol Zilvia Addict Join Date: Jan 2005 Location: quartz hill CA Age: 34 Posts: 644 Trader Rating: (8) Feedback Score: 8 reviews	maybe but your timing map will be fubar might even detonate just disconnect the wastegate flapper from the actuator no boost = no issues __________________ Need automotive work done in the antelope valley? Ask me how i can help.

11-06-2008, 04:40 PM	#3
mxsx25 Zilvia Junkie Join Date: Sep 2007 Location: hudson NH Age: 33 Posts: 415 Trader Rating: (0) Feedback Score: 0 reviews	doubt it w. that alone... if you get an adjustable fpr you MIIIIGGGGGHT be able to squeeze it but its risky... you should replace the 12lb wg with one from a stock turbo..8lbs... and make sure your around 11-11.5 : 1 afr in boost to be safe.. if not...boom boom boom lol __________________

11-06-2008, 05:00 PM	#4
s13dan Zilvia FREAK! Join Date: Aug 2003 Location: Springfield, Mo Posts: 1,519 Trader Rating: (2) Feedback Score: 2 reviews	so lets say i get some 550's, then with all the rest i should be safe... right? __________________ 89 240sx hatch #933-the hot rod 91 240sx coupe #131,603-the daily

11-06-2008, 06:09 PM	#7
GSXRJJordan Post Whore! Join Date: May 2006 Location: << 626 >> Posts: 9,135 Trader Rating: (19) Rides Gallery: GSXRJJordan Feedback Score: 19 reviews	Just so you know, a few of us run 11-12psi on stock redtops with GT28R's... Sileighty did a dyno run and dyno'd some 255whp with A/F's in the safe zone on 12psi IIRC. So you could be good now, but my feeling is that your SOHC KA maf is your weakest link at this point. If you can do the correction using your SAFC, a N60 MAF ($20-$40) would be the best investment to get the most out of the current setup. __________________ Jordan Innovations has a new web site! www.JordanInnovations.com -- All your favorite FD Pro Drifters love it, trust me -- www.JordanInnovations.com

11-07-2008, 10:41 AM	#8
s13dan Zilvia FREAK! Join Date: Aug 2003 Location: Springfield, Mo Posts: 1,519 Trader Rating: (2) Feedback Score: 2 reviews	I have a Z32 MAF, actually two in my garage but i thought i had to change something in my ECU to allow a Z32Maf to work. I cant just slap it on can I?And if i can scrap some cash up i need to spend it wisely, hence why im asking you guys questions. __________________ 89 240sx hatch #933-the hot rod 91 240sx coupe #131,603-the daily

11-07-2008, 11:16 AM	#9
Hashiriya415 Zilvia FREAK! Join Date: Jun 2007 Location: San Francisco Age: 33 Posts: 1,007 Trader Rating: (22) Feedback Score: 22 reviews	Trade your GT28 it for a S13 S14 or S15 turbo and get cash on top, and your car is gonna be running great.

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