Man I havent really drove my truck all that hard in a while and i tried today. I have my tune loaded and everything is at its usual setting. My 0-60 seemed like it took forever. Today was only in the high 80's so i didnt think it was that bad. Usually the truck climbs through the mph's with ease. Maybe its is just me but it seemed like it was a total dog. I would have been scared to race a 4.6 f150 it felt so bad. Well it cooled down tonight and seemed alot better. I know cooler temps make it run better but my word it seemd like 50rwhp difference. My tune from diablo has my timing back for my nitrous application. But i have run it with this tune for a while and it never seemd this bad. I havent changed the plugs in a while but i dont think its that. Your thoughts please. thanks
Alex

 

Maybe you just need to wash it. That always seems to make them feel faster.

Seriously though, maybe you should try a compression test or something if it's bad enough to really notice a huge difference.

I lost about 6-7 degrees of timing when I changed over to the big injectors and that is definately a very noticeable loss of power.

Then again it could be that you're just getting used to it. I hate when that happens.

John

 

Washing always helps, it even makes mine look faster.

I run tr55 plugs and gap em at .035". It runs good like that but I've heard that the tighter gap can reduce plug life. Can't remember how many miles I had on the old ones but I did notice a difference when I changed them. Not 50 to the rear wheels but it did make a difference.