Removing Smog Pump make much HP Diff?

ALS85GT · 01-22-2002, 03:11 PM

Hey guys, I have an 89GT vert that is all stock except for removal of air silencer and DynoMax mufflers. A friend of mine gave me a set of underdrive pulleys and I was wondering if removing the Air Pump and assorted hardware more trouble then it's worth? Does it improve anything more then parasitic drag?

PS, there's no smog testing in So. Florida right now.

Thanks.....

stanger8172 · 01-22-2002, 03:51 PM

Doing that alone won't give you any noticeable gain. Maybe 2hp tops.

Coupe5oh · 01-22-2002, 04:01 PM

I bypassed mine cuz it locked up, but i got no gain in e.t.'s, but those things are heavy. so removing it will lighten up the front, and you may have a small gain there.

Jeb_Bush_2000 · 01-22-2002, 04:11 PM

Take the cats off, too.

You can have no cats and an air pump, but not using an air pump with cats will clog them up and choke your motor.

ALS85GT · 01-22-2002, 04:12 PM

I'm not a real mechanic but I remember when I removed this fm another car the exhaust fumes where more noticable. I could barely stand it. Then again I also installed an h-pipe w/drilled thru cats. Thanks...I think I'll keep it on cause of the fumes and since it won't make much of a diff, cept shave some weight and about 2hp..........

01-22-2002, 03:11 PM	#1
ALS85GT Registered Member Join Date: Aug 2001 Location: Miami, Fl, USA Posts: 69	Removing Smog Pump make much HP Diff? Hey guys, I have an 89GT vert that is all stock except for removal of air silencer and DynoMax mufflers. A friend of mine gave me a set of underdrive pulleys and I was wondering if removing the Air Pump and assorted hardware more trouble then it's worth? Does it improve anything more then parasitic drag? PS, there's no smog testing in So. Florida right now. Thanks..... __________________ 85GT 5.0 was CFI converted to Holley 650. Hooker full length headers, FlowMaster 2 chamber. Weiand Stealth manifold. 86 roller motor, crane 1:7:1 alum rocker arms(roller). SSI 220@.050/498 Roller cam. Summit double roller timing chain. Melling oil pump, stock bottom end. Mallory Hi-Fire ignition. Under drive pulleys. Accell coil and Ford Motorsport 9mm wires. 93'8.8 posi. 4:10s. AOD w/B&M shift kit. No figures yet, still working on it. No back seats or AC. 1989 GT Convert-- All stock w/AOD, Air Silencer removed, DynoMax Mufflers.

01-22-2002, 03:51 PM	#2
stanger8172 Registered Member Join Date: Nov 2000 Location: Milwaukee,Wisconsin Posts: 380	Doing that alone won't give you any noticeable gain. Maybe 2hp tops. __________________ '91 LX convertible , T-5, Centerforce Dual Friction, MSD Blaster Coil, FR 9MM wires, 13* timing, 1.6rr, ported/polished/milled stock heads, 1.94/1.60 stainless valves, March Performance Pulleys, K&N panel, 1"spacer, BBK shorties, 2 1/2" off road H, Summit 2 1/2" catback

01-22-2002, 04:01 PM	#3
Coupe5oh Registered Member Join Date: Nov 2001 Location: SanAntonio, Tx Posts: 734	I bypassed mine cuz it locked up, but i got no gain in e.t.'s, but those things are heavy. so removing it will lighten up the front, and you may have a small gain there. __________________ Police package 5spd 90 Lx, Stock original motor, 3.27grs, BM fan, fms 10.5 clutch, D&D quadrant, and adjuster, ADS chip, 180 stat, mac cai, mac h-pipe, mac subframe connectors, ASP crank pulley, ripper shifter, 26x10.5 M/T sport pros welds. 246 hp according to analyzer Race weight: 3,120 E.t-13.57 with 26x10.50's e.t. streets. 1.88 60' mph- 99.92 mph

01-22-2002, 04:11 PM	#4
Jeb_Bush_2000 Registered Member Join Date: Jul 2001 Location: Taxachusetts Posts: 374	Take the cats off, too. You can have no cats and an air pump, but not using an air pump with cats will clog them up and choke your motor. __________________ Stripped-down '93 LX Coupe -- "Danielle" R.I.P. 05/30/02 "I've seen some crazy stuff in my life, but that...was...AWESOME!!! Oh, sorry about your car, man."

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01-22-2002, 04:12 PM	#5
ALS85GT Registered Member Join Date: Aug 2001 Location: Miami, Fl, USA Posts: 69	I'm not a real mechanic but I remember when I removed this fm another car the exhaust fumes where more noticable. I could barely stand it. Then again I also installed an h-pipe w/drilled thru cats. Thanks...I think I'll keep it on cause of the fumes and since it won't make much of a diff, cept shave some weight and about 2hp..........