smog pump

stang_guy_95 · 03-22-2003, 08:43 PM

I took of my smog pump about 6 months ago and right now i just have a free spinning pulley where it was. If I were to just bypass that pulley completely and free up about 12" of belt, would that give me a little more power?

Capri306 · 03-23-2003, 02:34 AM

Not really. You more than likely wouldn't even see it on all but the best dynamometers. Also, taking off the air pump only frees up about 1-1.5 HP, so if you noticed a difference after removing it......look for power elsewhere, I think you're wasting your time worrying about the belt. Now, underdrive pulleys are a totally different ballgame.

Get manual steering and ditch the entire a/c system if you're serious about losing parasitic drag. If you drive this car every day, I wouldn't do it.

stang_guy_95 · 03-23-2003, 12:23 PM

Thanks for clarifying. I've heard a few different things. How much hp gains should i get from adding under drive pulleys and are there any certain brands i should stay away from? Thanks.

stang_guy_95 · 03-23-2003, 09:43 PM

Who makes the best under drive pulleys or is there really much of a difference in brands?

V8Mustang · 03-24-2003, 06:18 AM

I have not seen much of a difference in brands on 5.0 pulleys. You will notice a gain with underdrives and they are fairly easy to install. On 4.6s there is a big difference in brand however.

Mountain Main · 03-25-2003, 11:50 AM

I've seen a belt diagram on this web page before. I need the diagram that shows the best way to by pass the smop pump.

Then do you just plug the vacuum line leading to the orface. I can't remember if there is any electrical leading to the smog pump.

03-22-2003, 08:43 PM	#1
stang_guy_95 Registered Member Join Date: Jul 2002 Location: michigan Posts: 56	smog pump I took of my smog pump about 6 months ago and right now i just have a free spinning pulley where it was. If I were to just bypass that pulley completely and free up about 12" of belt, would that give me a little more power?

03-23-2003, 02:34 AM	#2
Capri306 Moderator Join Date: Sep 1998 Location: Grand Rapids, Michigan, USA Posts: 1,001	Not really. You more than likely wouldn't even see it on all but the best dynamometers. Also, taking off the air pump only frees up about 1-1.5 HP, so if you noticed a difference after removing it......look for power elsewhere, I think you're wasting your time worrying about the belt. Now, underdrive pulleys are a totally different ballgame. Get manual steering and ditch the entire a/c system if you're serious about losing parasitic drag. If you drive this car every day, I wouldn't do it. __________________ Capri306, Moderator The Mustang Works Online 1979 Mercury Capri 1987 5.0L Mustang LX Notchback 1993 5.8L Eddie Bauer Bronco

03-23-2003, 09:43 PM	#4
stang_guy_95 Registered Member Join Date: Jul 2002 Location: michigan Posts: 56	pulleys?? Who makes the best under drive pulleys or is there really much of a difference in brands?

03-24-2003, 06:18 AM	#5
V8Mustang Registered Member Join Date: Mar 2003 Location: NC Posts: 64	I have not seen much of a difference in brands on 5.0 pulleys. You will notice a gain with underdrives and they are fairly easy to install. On 4.6s there is a big difference in brand however. __________________ www.CRmotorsports.com Ford Performance Parts

03-25-2003, 11:50 AM	#6
Mountain Main Registered Member Join Date: Feb 2003 Location: Minturn, CO 81645 Posts: 109	Routing diagram I've seen a belt diagram on this web page before. I need the diagram that shows the best way to by pass the smop pump. Then do you just plug the vacuum line leading to the orface. I can't remember if there is any electrical leading to the smog pump.

03-23-2003, 12:23 PM	#3
stang_guy_95 Registered Member Join Date: Jul 2002 Location: michigan Posts: 56	Thanks for clarifying. I've heard a few different things. How much hp gains should i get from adding under drive pulleys and are there any certain brands i should stay away from? Thanks.

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