As the title states, I keep seeing people talking about V10's with EGR and without EGR. My question is which one is "better"? My 99 V10 has the EGR...


Thanks!
Cole

 

The one that allows you to pass any needed emissions testing is the "better" one. If you don't have emissions testing, it doesn't matter.

Other than that, don't worry about it and just drive the truck.

Google your question, there's a wealth of information on the internet that you can learn on your own.

 

A few quick things about EGR:

It stands for Exhaust Gas Recirculation. It takes a small amount of exhaust gases and recycles them into the intake.

The purpose is to reduce the "peak combustion temperatures" under light-to-moderate loads.

This has two effects, the first one the most important:

First, it reduces NOx emissions (oxides of Nitrogen). This has a big effect on smog, and maybe some effect on some other things emissions-related.

Second, it has an added benefit of reducing the likelihood of pinging. One of the first indicators you had an EGR problem in the 70's and 80's was that the engine would ping like mad under light throttle.

Some say it also helps gas mileage, but that's up for debate.

There's nothing wrong with having it or not having it, as long as the engine came that way stock.

What sucks is when it breaks and you have to pay to fix it

Oh, and the reason you see some V10s with it and some without, California requires it on certain weight (GVWR) vehicles, with certain years as cutoffs. Most (if not all) non-PI head V10s had EGR, probably because they were first put in vans and were under the weight limit so they required it. When they first put the non-PI head V10 in the F-series, I guess they just figured why screw with a good thing