If your bullnose has a smog engine, what results would you notice if you simply removed the crossover tube, egr, air pump, and emission controls on the carb?

Older trucks seem to run forever without any of this stuff.

Thanks, j66b

 

Older trucks run forever without any of that stuff because they never had any of that stuff to begin with. Lots of folks on these boards over the years have struggled to get a smogger running good after a previous owner yanked all the alien looking gee-gaws and threw them away. Proceed with caution. Not saying it can't be done by any means, but can be frustrating because of the engineering that went in to it.

 

In most cases the external stuff isn't the main power killer. Low compression and smallish cams are the major issues. Removing egr can really fubar some engines as the ignition curve relies on the egr to prevent preignition. Air injection is nearly harmless and a pcv system is important. Evap is harmless and saves gas sometimes.

 

Is there a specific reason why you want to remove all of the components? If it is to save on gas and increase power, I would just remove the belt that runs the pump. I take mine off after emmision testing and then reinstall when it is time in two years. AS mentioned in previous posts, some items are required to have it run as designed.

 

What is the reasoning behind removing the belt so the pump doesn't run?

 

Yes, if he is asking if it is OK to remove all of the smog components for the reason to just increase power or save on gas, then removing the belt will increase that. It will not pump air into the exhaust and have an affect on emissions, but he may not need to be tested.

 

If you have all of that stuff in good working order, leave it alone.

You won't gain anything on a stock engine by removing it. In fact, there is a good chance your truck won't run as good without it.

 

Sorry, I could have worded my question better bcamill. I will try again.
You stated in your earlier post you remove the air pump belt after your emissions. If you must go through emissions, and have all under hood equipment in working order, what is the reason you remove the belt from the pump? Does it rob that much power?

 

No, it does not rob that much power, but these pumps are dry and need replacing more than I prefer to pay the 200 plus dollars to do so. I am just eliminating the use to preserve its life, as it does not affect the operation of the truck, just the ability to burn off gases better for the emissions test.

 

Thanks for the info.

 

With the EGR valve you can take a coke can even and use it to block it off, I would recommend doing this first to ensure no negative effects. I did it to mine cause I had a positive effect, my EGR valve for some reason keeps opening too soon and would cause a bog/stumble blocking it off took 90% of it away.

 

If the truck has the catalytic converter(s), I believe the operation of a functional smog pump helps to make them last longer (reduces the chances of a clogged catalytic converter).