I am looking to boost my Fuel efficiency any way possible, one of my ideas was to put a throttle body spacer on my 97 4.6 V8. any input? any other ideas out there for saving gas? anything would be helpful

 

2003 5.4, I used the Helix spacer--I notice a little more bottom end torque and got 1/2 mpg better, thats about it, if everything is working right and have a clean air filter you are not going to see any better gas mileage.

 

Throttle body spacers have more of a placebo type effect. The physics behind them really doesn't make sense in a port injected engine. The fuel/air mixture happens at the head. If the mix happened at the TB, then things would be different.

Having said that, I did go out and buy one - I have a Powerdyne power plate... I had to port it to match the newer 75mm TB. The TB made a small difference, but I'm pointing the truck in the direction for a supercharger.

Mileage-wise... didn't do a thing.

Other than tire pressure, a tune up, possibly a tuner or chip, and a light foot, you're not going to get much better mileage.

-Kerry

 

I agree with this guy. On my old f150 years ago I bought a camper top the same height as the truck, and got 3 mph over an open bed. Other than that to tell you the truth only 2 things will help you in the future with the price of gas. Be happy you have a great truck and with its size and physics on your side you will probably end up in better shape than the other guy in a crash and the hospital bill will be much cheaper and HURT less.

 

save your money- dont buy the plate. to get better milage, watch the lead foot.

 

thanks, that advice on the lead foot is a little hard to take. i put the dual exaust on it and all that makes me want to do is accelerate quicker.