Speed Density, no MAF, what coupler?
TECH Senior Member
iTrader: (10)
Joined: May 2005
Posts: 5,353
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From: Bossier city,LA barksdale AFB
lol the hot air intake? ya need to loose that lol. For the dyno its great but as soon as you close the hood it sucks compared to a lid with free mod. 
track proven to many friends
track proven to many friends Thats generous of you..
I know that when you go to a bigger cam, its wiser to tune it speed density because the overlap of the cam could throw readings off to the MAF, but sensors such as MAF and o2 sensors work very quickly.. Honestly, I cant recall why its better to use a speed density tune on stock-like or bolt on cars.. But I know due to cams having overlap its a better choice to run speed density vs MAF.. maybe MAf can be used to tune radical engines as well.. MAYBE, but right know I cant gather the information in my head to explain why or why not..
MAF and speed density are just 2 different types of engine management systems on cars.
I know that when you go to a bigger cam, its wiser to tune it speed density because the overlap of the cam could throw readings off to the MAF, but sensors such as MAF and o2 sensors work very quickly.. Honestly, I cant recall why its better to use a speed density tune on stock-like or bolt on cars.. But I know due to cams having overlap its a better choice to run speed density vs MAF.. maybe MAf can be used to tune radical engines as well.. MAYBE, but right know I cant gather the information in my head to explain why or why not..
MAF and speed density are just 2 different types of engine management systems on cars.
Dont know about N/A setups but with boosted apps the MAF is blind over certain pressures and the o2 sensors are widely inaccurate at WOT. SD relies upon MAP, IAT and wideband for accurate readings. Not sure how much of a diff it is for N/A guys though.
But I wasnt sure on FI, and it makes sense.. thanks for clarifying that.
are you SURE all cases of SD tunes use IAT though?
Through the search function, bringing this one back from the dead. So, which coupler am I going to need to delete my MAF on a stock sized SLP lid connecting to a stock TB? Is it the Fernco 3" ID x 6" long coupler or is it the 4" ID x 6" long one? I want the one that's going to fit the best. Home Depot is where I'll be getting it from.
Through the search function, bringing this one back from the dead. So, which coupler am I going to need to delete my MAF on a stock sized SLP lid connecting to a stock TB? Is it the Fernco 3" ID x 6" long coupler or is it the 4" ID x 6" long one? I want the one that's going to fit the best. Home Depot is where I'll be getting it from.
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