Kevllaar

I have recently purchased a Silverado 2500HD with 8.1L. I tow a 28ft. Toybox trailer with it, the truck does just fine pulling the trailer. I see advertised a Trottlebody spacer that is supposed to increase power and fuel economy. I'm alittle sceptical, has anyone tried any of the spacers? Where they worth the money?

cams 98 silverado

my friend tried it on his 92 explorer... he said he could tell a difference when all it was is a half inch piece of aluminum that cost him 100 bucks. that sexy 8.1l you got goin on sucks some major air. but you cant achieve more performance AND fuel economy. more air means more fuel thus that awesome performance increase. in my mind the only way to get more power and efficiency is a tune. by pokin around the air/fuel mix at different throttle positions and revs and such. thats just my idea. but it was weird because my friend with the exploder said he had both fuel economy and power. so i dont know. personally... i wouldnt get the plate. hell if you know someone that is good with metal and can get a plate of aluminum that thick then id say make it. i even hear ppl using wood. id rather get a better air flow sensor. but please this is only my ideas and my friends results. some say it worked for them others say different i hope it helped and i hope more post so you get your chance to choose.

mudmaniac

My TBI spacer helped alot............But mine does have a 2 little tubes that spray fuel and nitrous.

x1cn18

well first off i dont think economy and 8.1L go in the same sentance but my spacer helped a little on the torque but didnt notice anymore than about 1mpg increase

ukrkoz

you looked into those?
http://cgi.ebay.com/ebaymotors/aw-cg...m=380069451833

there's another one that has 'prongs" in the bore to create a vortex. also, i saw one for plenum, just can't find it again. also, with air turbulance modification.

jkgray80

I understand the theory on carbed engines, fuel is pulled furthur & atomizes into air better. Butmultiport FI engines,? If anything you are just de-tuning the intake. The air still goes through your heated throttle body so, there goes the denser charge claim. Unless of course you get one of the fancy threaded ones that makes little horsepower tornados in your intake.

Kevllaar

Thanks for all of the input. If I decide to get one I will definately post my results.