zip tie mod
Safety Car
Joined: Jan 2012
Posts: 3,956
Likes: 520
From: Da U.P.
as this comes up regularly:
i was doing some logging on a stock configuration/tune and so just for the hell of it i took of the lid of the air box. i checked map at 3000 and 6000 rpm.
well, what do you know, without the mod i lost 0.5 kpa and with the mod i lost 2 kpa. (i was loggging at 10 hz. the data is fluctuating by about +/- 1 kpa. i used a moving average and thats what i got.) conclusion: the effect is zero. your engine doesnt need more air than goes through the smal holes in the lid.
this also nicely shows you dont need a larger throttle body, maf or some "cold air intake" contraption. (iat was at ambient, btw.)
i was doing some logging on a stock configuration/tune and so just for the hell of it i took of the lid of the air box. i checked map at 3000 and 6000 rpm.
well, what do you know, without the mod i lost 0.5 kpa and with the mod i lost 2 kpa. (i was loggging at 10 hz. the data is fluctuating by about +/- 1 kpa. i used a moving average and thats what i got.) conclusion: the effect is zero. your engine doesnt need more air than goes through the smal holes in the lid.
this also nicely shows you dont need a larger throttle body, maf or some "cold air intake" contraption. (iat was at ambient, btw.)
