so you can buy athrottle body spacer through ebay for $60 shipped to your door. Is it worth the money? some people say it make a loud whistle noise on the gm trucks, is this true? am i really going to see the "4" mpg gain? just wondering. i get about 10 - 12 mpg with my 6L, but just got new tires today wanna see if that may help. Thanks

 

i saw a 13 rwhp increase and 3 mpg better on the highway from my spacer.

it was better than the tornado, i only got 10 hp from that.

 

Get a nitrous plate and cap off the fittings. It will act as a spacer and give you room for future power.

 

but does it whistle like a REAL spacer? thats the real question here buddy.

 

Spacers are useless on vortec trucks. Unless you're after the whistle.

 

chooo choooo


stop that!

 

The whistle isnt what im after, its the milage thing, i cant believe gm would put an engine that gets such crappy milage.

 

you are already dyno tuned?

if so, i dont think anything else is going to help much... unless you go leaner at cruise. should be about 14.7 AF/R at cruise (stoich) but you can get away with a little leaner

 

http://www.youtube.com/watch?v=Nnzw_i4YmKk
lol, oldy but goody.



D_Yurik you are new but really that could've been answered by a simple search.

 

yes speed inc. dyno tuned, im running between 12 and 14 on af/r