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Meph · 10-05-2010, 02:57 PM

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Hey guys,

Ive been testing different combinations of settings and Ive come to a conclusion for my car.

I found that +4 exhaust and 0 intake resulted in more torque down low

+6 exhaust and +3 Intake resulted in more torque than just +4

What Ive chosen to run : 0 , 0 (stock)

What I experienced

the increase in torque was a noticeable one, the issue is that I would only feel this torque increase with load on the engine, -18" to +12 psi. below this load, at -18" to -22" the engine seemed to produce significantly less. Where i was once cruse at 1.5 injection time in town, jumped to 1.6-1.7 be because i need to give it more throttle.

I think for many eco cars out there, this mod would very well help, because when your driving your engine is loaded to say -10" to -16" normally, my Datsun will cruse at -20" on flat ground, due to the light weigh body and engine swap. I only noticed a bonus to MPG's at much higher speeds than i usually drive, where the engine is turning a higher RPM and was under more load. I changed my cams back to stock part way though a drive and noticed a significant reduction in fuel injector times when cruising at very light loads (as i most often do)

So to conclude, I did produce more torque, but not in my required engine load area. Someone with a small engine would probably have benefited from his change where it only hindered me

Thanks for the input everyone. I may get ambitions and do some more testing but for now I think Ill take a quick break from it

10-05-2010, 02:57 PM	#31 (permalink)
Meph EcoModding Lurker Join Date: Apr 2008 Location: ontario Posts: 84 240Z - '73 Datsun 240Z 240Z 90 day: 34.41 mpg (US) Thanks: 15 Thanked 8 Times in 4 Posts	Results Hey guys, Ive been testing different combinations of settings and Ive come to a conclusion for my car. I found that +4 exhaust and 0 intake resulted in more torque down low +6 exhaust and +3 Intake resulted in more torque than just +4 What Ive chosen to run : 0 , 0 (stock) What I experienced the increase in torque was a noticeable one, the issue is that I would only feel this torque increase with load on the engine, -18" to +12 psi. below this load, at -18" to -22" the engine seemed to produce significantly less. Where i was once cruse at 1.5 injection time in town, jumped to 1.6-1.7 be because i need to give it more throttle. I think for many eco cars out there, this mod would very well help, because when your driving your engine is loaded to say -10" to -16" normally, my Datsun will cruse at -20" on flat ground, due to the light weigh body and engine swap. I only noticed a bonus to MPG's at much higher speeds than i usually drive, where the engine is turning a higher RPM and was under more load. I changed my cams back to stock part way though a drive and noticed a significant reduction in fuel injector times when cruising at very light loads (as i most often do) So to conclude, I did produce more torque, but not in my required engine load area. Someone with a small engine would probably have benefited from his change where it only hindered me Thanks for the input everyone. I may get ambitions and do some more testing but for now I think Ill take a quick break from it __________________