Speed Density VS MAF

Tr1gger · April 17th, 2007, 10:57 AM

I have heard that modding and engine with the speed density set up will actually slow the car down. Any truth behind this? Is the MAF system the best way to go hands down?

mustangman9550 · April 17th, 2007, 11:15 AM

MAF for sure. Too many mod.s on a speed density setup and you'll wind up with your ride not acting worth a damn. Definitely if you plan on more than just a few simple bolt-ons go ahead and upgrade to MAF.....it'll be worth it.

1slo5.0 · April 17th, 2007, 03:13 PM

Originally Posted by insnedrmr

I have heard that modding and engine with the speed density set up will actually slow the car down. Any truth behind this? Is the MAF system the best way to go hands down?

No, that is totally false. You can run into idle problems with aftermarket camshafts if you have a factory Ford speed density system. Alot of aftermarket EFI systems are speed density. If there was an issue with it being worse than mass air systems everyone would be using mass air, which isn't the case.

HACKGT350 · April 17th, 2007, 04:26 PM

Originally Posted by Darrell

Originally Posted by insnedrmr

I have heard that modding and engine with the speed density set up will actually slow the car down. Any truth behind this? Is the MAF system the best way to go hands down?

No, that is totally false. You can run into idle problems with aftermarket camshafts if you have a factory Ford speed density system. Alot of aftermarket EFI systems are speed density. If there was an issue with it being worse than mass air systems everyone would be using mass air, which isn't the case.

he is right sd and cams dont go together very well. its gunna have a hard time finding the cam idle and the throttle response wont be very good either

89LX347 · April 17th, 2007, 08:31 PM

You will need a chip burned for it to run properly. This is the problem with speed density you have to have a chip burned when you do upgrades to it to compensate for most parts that are better than stock.

ih8chevy · April 17th, 2007, 10:30 PM

sd is a good way to go for people with experience in that area. maf is a little more street friendly.

HACKGT350 · April 17th, 2007, 11:12 PM

Originally Posted by ih8chevy

sd is a good way to go for people with experience in that area. maf is a little more street friendly.

are you also on mustangforums.com?

tim si · April 17th, 2007, 11:24 PM

My dad has a cougar with S.D. ported heads,long tube headers,F-cam,t-5,373 gears.Idles fine and it will Scream.No chip.( stock ecu)Everyone kept telling my brother it wouldnt work but he tried it anyway.I switched it to mass yesterday and it runs no better,but it probably will get better milage now.he was getting 17mpg with S.D.

April 17th, 2007, 10:57 AM	#1
Tr1gger Regular Join Date: Jan 2007 Posts: 188 iTrader: 0 reviews	Speed Density VS MAF I have heard that modding and engine with the speed density set up will actually slow the car down. Any truth behind this? Is the MAF system the best way to go hands down?

April 17th, 2007, 11:15 AM	#2
mustangman9550 Regular Join Date: Mar 2006 Location: Tuscaloosa,AL Posts: 153 iTrader: 0 reviews	MAF for sure. Too many mod.s on a speed density setup and you'll wind up with your ride not acting worth a damn. Definitely if you plan on more than just a few simple bolt-ons go ahead and upgrade to MAF.....it'll be worth it. __________________

April 17th, 2007, 08:31 PM	#5
89LX347 Hardcore Enthusiast Join Date: Apr 2007 Posts: 1,304 iTrader: 0 reviews	You will need a chip burned for it to run properly. This is the problem with speed density you have to have a chip burned when you do upgrades to it to compensate for most parts that are better than stock. __________________ I believe in art when it is not seen. I believe in music when it is not audible. I believe in God when He is silent.

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Speed Density VS MAF

Speed Density VS MAF

Re: Speed Density VS MAF

Re: Speed Density VS MAF

April 17th, 2007, 10:30 PM	#6
ih8chevy Regular Join Date: Dec 2006 Posts: 151 iTrader: 0 reviews	sd is a good way to go for people with experience in that area. maf is a little more street friendly.

April 17th, 2007, 11:24 PM	#8
tim si Newbie Join Date: Mar 2007 Posts: 28 iTrader: 0 reviews	My dad has a cougar with S.D. ported heads,long tube headers,F-cam,t-5,373 gears.Idles fine and it will Scream.No chip.( stock ecu)Everyone kept telling my brother it wouldnt work but he tried it anyway.I switched it to mass yesterday and it runs no better,but it probably will get better milage now.he was getting 17mpg with S.D.

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