help deleting smog pump
- Thread starter mustangking101
- Start date
The simplest way would be to remove the pump and get a shorter serpentine belt. An 89.5" belt is what you'll need. I have BBK underdrive pulleys on my Cobra, and the difference in the sizes of the BBK pulleys necessitated a slightly longer belt as the 89.5" was just a bit too short. I remedied the problem with a 90" belt. If you have a Cobra you'll have to bend the oil cooler lines slightly in order to keep the belt from making contact with them (the belt routes around the opposite side of the water pump and crank pulleys in the short belt routing).
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94-302-vert
Active Member
You can definitely bypass the smog pump without removing. Not sure why you would, though. Removing the pump and associated thermactor tubing isn't a tough task.
This thread has some good info and diagrams concerning the belts you need for different bypasses and alternate routings.
You'll get a power gain either way since the crank will have one fewer pulley to drive. However, any power gain related to deleting or bypassing the smog pump will be negligible. I just like to delete it because it cleans up the engine bay and makes it easier to change spark plugs.
Husky44
10 Year Member
My .02 worth: Deleting smog is a way to lose weight. It doesn't seem to do much for performance. I'm running a pulley kit, and took the smog and A/C off the car. No noticeable change in performance; might have changed exhaust note a bit, but nothing noteworthy. Car did lose enough weight in the nose that I could visibly see the difference at the front fender to tire gap.
Therefore: If you're not going to remove the pump and associated plumbing, don't bother with the shorter belt. You're not going to get any power gains to speak of.
Therefore: If you're not going to remove the pump and associated plumbing, don't bother with the shorter belt. You're not going to get any power gains to speak of.
95Vert383AOD
15 Year Member
Remove the hoses...and EGR, Plug the line going to the header....then pull the passenger side plastic in the wheel well and unplug the long vacuum controller with red/green etc. colored hard vacuum lines......I hate seeing an unfinished job. If youre gonna remove the Smog system....best to remove it to the point where it looks like it was never there.
Chris
Chris
You could. You would just have to plug both tubes with something.
Removing that tubing is easier than it sounds. Just remove the rubber hoses and vacuum tubes associated with the smog pump, then unbolt the tube that goes to the h-pipe so that it hangs loose. It has a small clamp where it attaches to the h-pipe, and a small bolt that attaches to a bracket on the passenger side of the h-pipe for support. With the longer tube loose you will be able to unbolt the tube from the backside of the engine. It just take a bit of wiggling to remove it completely once it's unbolted. If the longer tube gets in the way, just bend it until is isn't. The logner tube will come out easily once the tube behind the engine is removed.
You can cap the tube that's left on the h-pipe with something so it doesn't result in an exhaust leak, and just cut the tube that went behind the engine and flip it backwards so that it covers the thermactor ports in the heads. There's really nothing to it.
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