Those with Topmount Turbo's and ROM Tune with MAF, Please Help! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

SixSpeedSleuth · 11-11-2007, 10:11 AM

I have searched religioulsy locally, so I'm going to expand my search. I'm running a TS 3071R Topmounted with an Enthalpy Rom tune. So, basically I'm still running a MAF. I'm sick to death of Maf turbulence, the car idling like shit, and the car cutting off if I don't manually "catch" the revs. I know this is Mafs turbulence, but I can't lengthen my intake pipe anymore unless I have a custom one made (I can't find ANYBODY locally to do this and I've searched). So, can everybody show me the picks of YOUR Intake Pipe setup with a topmount and Mafs? Or, if somebody knows a shop or can build me a pipe that will fit in my bay with the appropriate length/bends I will gladly pay somebody. Here is a pic for reference followed with my current setup.

Now, my setup at the moment.

babowc · 11-11-2007, 10:56 AM

have you considered blow-through?

2bad240 · 11-11-2007, 11:04 AM

i have my pipe going down.

rps13drift · 11-11-2007, 11:11 AM

I did blow through!

Josh K. · 11-11-2007, 11:12 AM

get a map-ecu. I'll sell you my old version for cheap.

SixSpeedSleuth · 11-11-2007, 11:40 AM

With "Blow Through" do you mean routing the breather from the Catch can into the intake pipe after the Maf? Will that eliminate my problems?

Also, the poster that put his pipe "down". Did that elimanate the turbulence??

I'm just sick of the horrible idle and such. But, is does run fantastic under full throttle.

bardabe · 11-11-2007, 11:50 AM

Quote:

Originally Posted by SixSpeedSleuth

With "Blow Through" do you mean routing the breather from the Catch can into the intake pipe after the Maf? Will that eliminate my problems?

Also, the poster that put his pipe "down". Did that elimanate the turbulence??

I'm just sick of the horrible idle and such. But, is does run fantastic under full throttle.

blow through means you put the maf on the cold pipe after the turbo. before the thottle body, after the intercooler

SixSpeedSleuth · 11-11-2007, 11:53 AM

Quote:

Originally Posted by bardabe

blow through means you put the maf on the cold pipe after the turbo. before the thottle body, after the intercooler

Hmmm. Interesting. So, the Maf would function normally and this would eliminate all of the symptoms I described? Also, I could just bolt the Filter right onto the turbo with no Intake Pipe if I did blow through right?

bardabe · 11-11-2007, 11:56 AM

Quote:

Originally Posted by SixSpeedSleuth

Hmmm. Interesting. So, the Maf would function normally and this would eliminate all of the symptoms I described? Also, I could just bolt the Filter right onto the turbo with no Intake Pipe if I did blow through right?

exactly, also if you put the BOV before the MAF (hot pipe) you won't have any stalling or running rich betwen shifts issues.

johngriff · 11-11-2007, 12:18 PM

an SAFC will fix this with the decel setting.

SixSpeedSleuth · 11-11-2007, 01:07 PM

Quote:

Originally Posted by johngriff

an SAFC will fix this with the decel setting.

Will this fix the idle as well? I can't get it it to idle less than 1800 or so rpms.

bardabe · 11-11-2007, 01:09 PM

Quote:

Originally Posted by SixSpeedSleuth

Will this fix the idle as well? I can't get it it to idle less than 1800 or so rpms.

he was talking about the running rich betwen shifts and stalling when getting off the freeway

johngriff · 11-11-2007, 01:12 PM

Probably not, that sounds like you tps or timing, or AICV or TUNE is off.

I just know for a fact that one of the little things the SAFC does right is Decel AFM Signal trick, where you lift and the SAFC sends a flat voltage to the ecu for the MAF signal, fixes the Open atmosphere BOV dip and and turbulent maf air.

Unfortunately the SAFC doesn't make for a good tuning tool.

bardabe · 11-11-2007, 01:13 PM

Quote:

Originally Posted by johngriff

Probably not, that sounds like you tps or timing, or AICV or TUNE is off.

I just know for a fact that one of the little things the SAFC does right is Decel AFM Signal trick, where you lift and the SAFC sends a flat voltage to the ecu for the MAF signal, fixes the Open atmosphere BOV dip and and turbulent maf air.

Unfortunately the SAFC doesn't make for a good tuning tool.

actually i really think its the MAF problem my buddy had the same problem. (Vinhisbored) we extended his intake pipe to 18" and walah! everything was A Ok.

SixSpeedSleuth · 11-11-2007, 01:25 PM

Quote:

Originally Posted by johngriff

Probably not, that sounds like you tps or timing, or AICV or TUNE is off.

I just know for a fact that one of the little things the SAFC does right is Decel AFM Signal trick, where you lift and the SAFC sends a flat voltage to the ecu for the MAF signal, fixes the Open atmosphere BOV dip and and turbulent maf air.

Unfortunately the SAFC doesn't make for a good tuning tool.

I think Bardabe is right. I did have an extra bend in my intake pipe, but it was not a smooth transition to the turbo, and I was losing power, however, it would idle right *most* of the time and would not cut off between shifts, ect, ect.

I've checked TPS voltage, my base timing is 15* and my tune is Enthalpy, and I DOUBT his tune is off. I've had 4 tunes from him with all spot on AFR and such. I have not checked the IACV, but it does not seem like a problem related to that.

So, from what I'm reading, a blow through setup would be the easiest way to rid all of these problems? Or, get a custom intake Pipe?

SixSpeedSleuth · 11-11-2007, 01:26 PM

Quote:

Originally Posted by bardabe

actually i really think its the MAF problem my buddy had the same problem. (Vinhisbored) we extended his intake pipe to 18" and walah! everything was A Ok.

Do you have a picture of this setup? I've looked the engine bay over, I just don't see anywhere to extend this to unless I have a custom Intake Pipe made with several bends. I've already purchased the Aluminum pipe, I just cant find ANYBODY willing to custom make one for me.

2bad240 · 11-11-2007, 01:27 PM

yea i had my maf to close and it was doing the samething you are talking about, my car would foul a set of plugs in less than 5 minutes, then i extended the pipe and it ran fine.

2bad240 · 11-11-2007, 01:29 PM

my pipe came from vibrant, it was like $26.

SixSpeedSleuth · 11-11-2007, 01:31 PM

Quote:

Originally Posted by 2bad240

my pipe came from vibrant, it was like $26.

Picture or link? This is with a Z32 Maf and topmount right?

turtl631 · 11-11-2007, 03:36 PM

To avoid this on a turbo KA setup, we ran the filter in the driver side front fenderwell area with the MAF shortly after it and a longer pipe going to the turbo. Seemed to work pretty well. BUT, then you have all the issues associated with a CAI, namely sucking up water if you go through puddles, etc. Could be hard to route depending on your IC setup also.

johngriff · 11-11-2007, 04:26 PM

flatter filter (like the hks... or ebay knockoff anyone?), and longer pipe, push it up against the fender well.

SixSpeedSleuth · 11-11-2007, 06:26 PM

Quote:

Originally Posted by johngriff

flatter filter (like the hks... or ebay knockoff anyone?), and longer pipe, push it up against the fender well.

Thanks for the suggestion, but that's the step I'm at now. I had the JWT Pop Charger, but then bought an Power Enterprise Filter because of it's compact nature and I have it tucked as deep and as far into against the fender well as I could get it.

SixSpeedSleuth · 11-12-2007, 09:53 AM

Anybody else have pictures of their setup?

dkingkong · 11-12-2007, 09:59 AM

you're supposed to have at least 12" of piping from the MAF to the compressor wheel, right?

why not just route it down.
I've seen some people route the filter infront of the motor.. not a great idea!

turtl631 · 11-12-2007, 11:38 AM

True, I've seen setups with the intake on the passenger side. You get a really long straight section of pipe that way, but you have to worry about clearing cold side IC pipes, clutch fan (if you still have it), plus possible heating of the charge air (doubtful). Actually, might not be a bad idea if you have room.

DUBCITY · 11-12-2007, 11:43 AM

you guys that run MAFS on the gt3071 TS should order it with the 3" inlet instead of the 4". that 4"-3" reducer cant be helping the turbulence inside the intake.

smelly240 · 11-12-2007, 06:42 PM

its downstairs where u cant see it unless ur out front layin on the ground.

the extra width opening is for the ported shroud - the compressor wheels inlet is still little...

not driven in or around water... - just so u guys know.

SixSpeedSleuth · 11-12-2007, 07:15 PM

Smelly240, thanks for the picture. I'm going to try and figure out something soon. Is there any way you can snap a picture of the actual Mafs and Filter location?? Thanks!

turtl631 · 11-12-2007, 10:40 PM

Good point on the 4" opening- I wonder if that significantly affects turbulence within the MAF when using a sharp 3"-4" transition coupler. From what I've read about the ported shroud housings, I'm not even so sure I'd want one, but that's besides the point if you already have it on there. I'd say that somehow relocating the filter and MAF to inside your front fenderwell is the way to go. Also try to keep the BOV recirc hose and/or catch can vacuum source far from the MAF is possible.

Pepperoni · 11-12-2007, 11:04 PM

SixSpeedSleuth, you have a PM. might be able to help fab one up for you

11-11-2007, 10:11 AM	#1
SixSpeedSleuth Zilvia Member Join Date: Jul 2007 Location: North Carolina Age: 46 Posts: 176 Trader Rating: (3) Feedback Score: 3 reviews	Those with Topmount Turbo's and ROM Tune with MAF, Please Help! I have searched religioulsy locally, so I'm going to expand my search. I'm running a TS 3071R Topmounted with an Enthalpy Rom tune. So, basically I'm still running a MAF. I'm sick to death of Maf turbulence, the car idling like shit, and the car cutting off if I don't manually "catch" the revs. I know this is Mafs turbulence, but I can't lengthen my intake pipe anymore unless I have a custom one made (I can't find ANYBODY locally to do this and I've searched). So, can everybody show me the picks of YOUR Intake Pipe setup with a topmount and Mafs? Or, if somebody knows a shop or can build me a pipe that will fit in my bay with the appropriate length/bends I will gladly pay somebody. Here is a pic for reference followed with my current setup. Now, my setup at the moment.

11-11-2007, 10:56 AM	#2
babowc Post Whore! Join Date: Nov 2005 Location: G.NET Posts: 2,659 Trader Rating: (9) Feedback Score: 9 reviews	have you considered blow-through? __________________ My iTrader rating!

11-11-2007, 11:04 AM	#3
2bad240 Leaky Injector Join Date: Feb 2007 Location: north carolina Age: 39 Posts: 109 Trader Rating: (0) Feedback Score: 0 reviews	i have my pipe going down. __________________ you, its whats for dinner.

11-11-2007, 11:11 AM	#4
rps13drift Zilvia FREAK! Join Date: Oct 2006 Location: NJ BRO!!!! Age: 39 Posts: 1,194 Trader Rating: (6) Rides Gallery: rps13drift Feedback Score: 6 reviews	I did blow through! __________________ http://allies-drift.blogspot.com/

11-11-2007, 12:18 PM	#10
johngriff Post Whore! Join Date: Jun 2004 Location: Long Beach, CA Posts: 4,103 Trader Rating: (4) Rides Gallery: johngriff Feedback Score: 4 reviews	an SAFC will fix this with the decel setting. __________________ [email protected]

11-11-2007, 11:12 AM	#5
Josh K. Leaky Injector Join Date: May 2006 Location: Bellingham, WA Age: 48 Posts: 59 Trader Rating: (0) Feedback Score: 0 reviews	get a map-ecu. I'll sell you my old version for cheap.

11-11-2007, 11:40 AM	#6
SixSpeedSleuth Zilvia Member Join Date: Jul 2007 Location: North Carolina Age: 46 Posts: 176 Trader Rating: (3) Feedback Score: 3 reviews	With "Blow Through" do you mean routing the breather from the Catch can into the intake pipe after the Maf? Will that eliminate my problems? Also, the poster that put his pipe "down". Did that elimanate the turbulence?? I'm just sick of the horrible idle and such. But, is does run fantastic under full throttle.

11-11-2007, 01:12 PM	#13
johngriff Post Whore! Join Date: Jun 2004 Location: Long Beach, CA Posts: 4,103 Trader Rating: (4) Rides Gallery: johngriff Feedback Score: 4 reviews	Probably not, that sounds like you tps or timing, or AICV or TUNE is off. I just know for a fact that one of the little things the SAFC does right is Decel AFM Signal trick, where you lift and the SAFC sends a flat voltage to the ecu for the MAF signal, fixes the Open atmosphere BOV dip and and turbulent maf air. Unfortunately the SAFC doesn't make for a good tuning tool. __________________ [email protected]

11-11-2007, 01:27 PM	#17
2bad240 Leaky Injector Join Date: Feb 2007 Location: north carolina Age: 39 Posts: 109 Trader Rating: (0) Feedback Score: 0 reviews	yea i had my maf to close and it was doing the samething you are talking about, my car would foul a set of plugs in less than 5 minutes, then i extended the pipe and it ran fine. __________________ you, its whats for dinner.

11-11-2007, 01:29 PM	#18
2bad240 Leaky Injector Join Date: Feb 2007 Location: north carolina Age: 39 Posts: 109 Trader Rating: (0) Feedback Score: 0 reviews	my pipe came from vibrant, it was like $26. __________________ you, its whats for dinner.

11-11-2007, 03:36 PM	#20
turtl631 Zilvia Addict Join Date: Aug 2004 Location: Milwaukee WI Posts: 900 Trader Rating: (3) Feedback Score: 3 reviews	To avoid this on a turbo KA setup, we ran the filter in the driver side front fenderwell area with the MAF shortly after it and a longer pipe going to the turbo. Seemed to work pretty well. BUT, then you have all the issues associated with a CAI, namely sucking up water if you go through puddles, etc. Could be hard to route depending on your IC setup also.

11-11-2007, 04:26 PM	#21
johngriff Post Whore! Join Date: Jun 2004 Location: Long Beach, CA Posts: 4,103 Trader Rating: (4) Rides Gallery: johngriff Feedback Score: 4 reviews	flatter filter (like the hks... or ebay knockoff anyone?), and longer pipe, push it up against the fender well. __________________ [email protected]

11-12-2007, 09:53 AM	#23
SixSpeedSleuth Zilvia Member Join Date: Jul 2007 Location: North Carolina Age: 46 Posts: 176 Trader Rating: (3) Feedback Score: 3 reviews	Anybody else have pictures of their setup?

11-12-2007, 09:59 AM	#24
dkingkong Leaky Injector Join Date: Nov 2007 Location: nevada Age: 40 Posts: 58 Trader Rating: (0) Feedback Score: 0 reviews	you're supposed to have at least 12" of piping from the MAF to the compressor wheel, right? why not just route it down. I've seen some people route the filter infront of the motor.. not a great idea!

11-12-2007, 11:38 AM	#25
turtl631 Zilvia Addict Join Date: Aug 2004 Location: Milwaukee WI Posts: 900 Trader Rating: (3) Feedback Score: 3 reviews	True, I've seen setups with the intake on the passenger side. You get a really long straight section of pipe that way, but you have to worry about clearing cold side IC pipes, clutch fan (if you still have it), plus possible heating of the charge air (doubtful). Actually, might not be a bad idea if you have room.

11-12-2007, 11:43 AM	#26
DUBCITY Zilvia Junkie Join Date: Mar 2003 Location: Redondo Beach, Ca Age: 41 Posts: 596 Trader Rating: (9) Feedback Score: 9 reviews	you guys that run MAFS on the gt3071 TS should order it with the 3" inlet instead of the 4". that 4"-3" reducer cant be helping the turbulence inside the intake.

11-12-2007, 06:42 PM	#27
smelly240 Nissanaholic! Join Date: Oct 2006 Location: Philaburbia Age: 47 Posts: 2,137 Trader Rating: (4) Feedback Score: 4 reviews	its downstairs where u cant see it unless ur out front layin on the ground. the extra width opening is for the ported shroud - the compressor wheels inlet is still little... not driven in or around water... - just so u guys know. __________________ HREs on a S13 - check, 6262 - check, Girlfriend.... - nope

11-12-2007, 07:15 PM	#28
SixSpeedSleuth Zilvia Member Join Date: Jul 2007 Location: North Carolina Age: 46 Posts: 176 Trader Rating: (3) Feedback Score: 3 reviews	Smelly240, thanks for the picture. I'm going to try and figure out something soon. Is there any way you can snap a picture of the actual Mafs and Filter location?? Thanks!

11-12-2007, 10:40 PM	#29
turtl631 Zilvia Addict Join Date: Aug 2004 Location: Milwaukee WI Posts: 900 Trader Rating: (3) Feedback Score: 3 reviews	Good point on the 4" opening- I wonder if that significantly affects turbulence within the MAF when using a sharp 3"-4" transition coupler. From what I've read about the ported shroud housings, I'm not even so sure I'd want one, but that's besides the point if you already have it on there. I'd say that somehow relocating the filter and MAF to inside your front fenderwell is the way to go. Also try to keep the BOV recirc hose and/or catch can vacuum source far from the MAF is possible.

11-12-2007, 11:04 PM	#30
Pepperoni Zilvia Addict Join Date: Jun 2003 Location: norcal Posts: 750 Trader Rating: (0) Feedback Score: 0 reviews	SixSpeedSleuth, you have a PM. might be able to help fab one up for you