More Air=Less Torque.?

Chan Chee Hoe · 02-16-2011, 05:40 AM

Hi Friends,good morning,i change my air filter to C.A.I.,but noticed the car has even less 'Low End Torque',did any members here noticed it.?Mine is an auto,this made the car have slower respond on city driving...thanks.

G37sHKS · 02-16-2011, 06:44 AM

Was it custom intakes?

ChrisSlicks · 02-16-2011, 08:34 AM

What one did you install? If the pipe diameter around the MAF was changed then it could have leaned the car out and reduced power.

Abdiel · 02-16-2011, 10:52 AM

I think if you're running rich (which seems to be the case for stock setup), leaning out gives more power (up to point of detontation).

Btw, OP mentioned changing air filters to CAI. Was it only a filter change (e.g. to K&N) or the whole OEM intake to an aftermarket intake?

christian370z · 02-16-2011, 02:26 PM

When I installed my Stillen G3 intake, I noticed more power everywhere and especially in the higher revs.

TongMan · 02-16-2011, 04:58 PM

When you go CAI, you will gain it across the power band, but mostly in the higher RPMs, so you will feel like you lost low end torque.

Chan Chee Hoe · 02-16-2011, 05:43 PM

Quote:

Originally Posted by TongMan

When you go CAI, you will gain it across the power band, but mostly in the higher RPMs, so you will feel like you lost low end torque.

Agreed,better at high Rpm,not so good at city driving.

Chan Chee Hoe · 02-16-2011, 05:43 PM

Quote:

Originally Posted by chrisslicks

what one did you install? If the pipe diameter around the maf was changed then it could have leaned the car out and reduced power.

hks...

370z_2910 · 02-16-2011, 10:40 PM

Yes..i've noticed that too..

It seems it reduced the low end torque...

It makes the car less aggressive during over-take of the other car after installing the g3 which i prefer like that...

After 4k, the power are more noticeable after the g3 which is more useful during driving on the highway road...

Jordo! · 02-17-2011, 12:18 AM

optimal flow will vary according to effective VE of motor at different RPM's.

Better flowing exhaust will often help you higher in the rev range because better effective VE to take advantage of it, but at lower RPM, the greater available air mass actually slows flow, so you lose some low speed torque.

Be nice if VVEL could be tuned to work around that...

Rooskey · 02-17-2011, 01:48 AM

This is why everyone shoots for max power results on the dyno. On the street dyno results dont do sh#%t. You have an engine just like everyone else here does, I would look for average horsepower gain rather than peak gains. Yes you probably did loose some low end but got some on the top end. How often are you just on the top end when your racing someone? Not all the time. Build your car where it runs good from 45 to 75 rpms. Average HP's always do it better. Even on the road courses!!

Alfamale · 02-17-2011, 10:57 AM

Quote:

Originally Posted by Rooskey

This is why everyone shoots for max power results on the dyno. On the street dyno results dont do sh#%t. You have an engine just like everyone else here does, I would look for average horsepower gain rather than peak gains. Yes you probably did loose some low end but got some on the top end. How often are you just on the top end when your racing someone? Not all the time. Build your car where it runs good from 45 to 75 rpms. Average HP's always do it better. Even on the road courses!!

+1

Chan Chee Hoe · 02-18-2011, 06:58 AM

i think the poor low end torque,also partial blame on the warm weather here....engines don't like warm air...

02-16-2011, 05:40 AM	#1 (permalink)
Chan Chee Hoe Track Member Join Date: Mar 2009 Location: Singapore Posts: 861 Drives: 370z,Yellow,7sp A Rep Power: 17	More Air=Less Torque.? Hi Friends,good morning,i change my air filter to C.A.I.,but noticed the car has even less 'Low End Torque',did any members here noticed it.?Mine is an auto,this made the car have slower respond on city driving...thanks.

02-16-2011, 08:34 AM	#3 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 653	What one did you install? If the pipe diameter around the MAF was changed then it could have leaned the car out and reduced power. __________________ Hotchkis ARB \| Stillen CAI \| Art Pipes \| Berk CBE \| Stillen AP Racing Brakes \| AE Performance Oil Cooler \| BC Racing ER Coilovers \| Doran Control Arms

02-16-2011, 02:26 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	When I installed my Stillen G3 intake, I noticed more power everywhere and especially in the higher revs. __________________ -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

02-17-2011, 12:18 AM	#10 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 417	optimal flow will vary according to effective VE of motor at different RPM's. Better flowing exhaust will often help you higher in the rev range because better effective VE to take advantage of it, but at lower RPM, the greater available air mass actually slows flow, so you lose some low speed torque. Be nice if VVEL could be tuned to work around that... __________________ Enjoy it. Destroy it.

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02-16-2011, 06:44 AM	#2 (permalink)
G37sHKS A True Z Fanatic Join Date: Feb 2010 Location: Dubai Posts: 1,183 Drives: 09 G37S Coupe 7AT Rep Power: 20	Was it custom intakes?

02-16-2011, 10:52 AM	#4 (permalink)
Abdiel Base Member Join Date: Jan 2009 Location: Detroit, MI Posts: 73 Drives: 09 G37S 6MT Rep Power: 16	I think if you're running rich (which seems to be the case for stock setup), leaning out gives more power (up to point of detontation). Btw, OP mentioned changing air filters to CAI. Was it only a filter change (e.g. to K&N) or the whole OEM intake to an aftermarket intake?

02-16-2011, 04:58 PM	#6 (permalink)
TongMan A True Z Fanatic Join Date: Feb 2010 Location: NorCal Posts: 1,297 Drives: 2013 Nissan GTR Rep Power: 715	When you go CAI, you will gain it across the power band, but mostly in the higher RPMs, so you will feel like you lost low end torque.

02-16-2011, 10:40 PM	#9 (permalink)
370z_2910 Base Member Join Date: Sep 2009 Location: BRUNEI Posts: 127 Drives: 370Z Rep Power: 15	Yes..i've noticed that too.. It seems it reduced the low end torque... It makes the car less aggressive during over-take of the other car after installing the g3 which i prefer like that... After 4k, the power are more noticeable after the g3 which is more useful during driving on the highway road...

02-17-2011, 01:48 AM	#11 (permalink)
Rooskey Track Member Join Date: Jul 2010 Location: South Carolina Posts: 974 Drives: 2014 Alpha7 GTR Rep Power: 15	This is why everyone shoots for max power results on the dyno. On the street dyno results dont do sh#%t. You have an engine just like everyone else here does, I would look for average horsepower gain rather than peak gains. Yes you probably did loose some low end but got some on the top end. How often are you just on the top end when your racing someone? Not all the time. Build your car where it runs good from 45 to 75 rpms. Average HP's always do it better. Even on the road courses!!

02-18-2011, 06:58 AM	#13 (permalink)
Chan Chee Hoe Track Member Join Date: Mar 2009 Location: Singapore Posts: 861 Drives: 370z,Yellow,7sp A Rep Power: 17	i think the poor low end torque,also partial blame on the warm weather here....engines don't like warm air...