So.... I got a good view of what big tires. and 3.55 gears can do.... err... NOT do.

I ran my truck twice on the track last night as a test and tune. 18.3 both times.

so a six inch lift 35x12.5r18 tires and 3.55 gears = slow as $#&@

so now I cannot wait to get gears in my beast. weird thing is the truck "Feels" faster than my 1996 yet its much SLOWER.

truck specs.

2003 F-150 ext cab. afe intake and edge programer. (edge was on level 2) magnaflow cat back exhaust.

6 inch fabtech lift with 35 inch tires on the stock 3.55 gears.

 

poor transmission and poor motor

 

You getting 4.10 or 4.56?

 

Yeah you really need some gears on that, my bone stock 4.2 ran 18.2s with 3.08 open diff. Good luck with the build.

 

The transmission temp never got above 120 going down the 1/4 mile, And I don't think doing 2 runs to get a baseline was gonna hurt it.

never the less yeah I agree no one should race a truck with huge tires and 3.55 gears.

im going 4.56 for gears. and I am ordering a valvebody in the near future (any recommendations?)

also I am getting different tires. something thats lighter but still 35 inches.

 

I have heard the car valve bodys are the best.

 

wow, just goes to show how fast the 6.2L Raptor really is. I've seen high 15's from stock Raptors (on 35's).

 

Gregg Evans.... Factory tech shift kit.. He knows what he is doing for sure.
Positive no slip shifts that bark 2nd and raise the nose of the truck in third at 75

 

hell i ran a 17.01 in my f150 with the 5.4, 4.88 gears, and 38 inch toyos

 

I ran 16.5 in my 4.6L. That's with massive 23" Saleen wheels in 305/40 rubber and 3.55's.
Plan on going to 4.30's soon, but not bad for now.