I have a 2007 F150 Roush 500RC, with a ported plenum, smaller pulley to get 10lbs of boost, C.O.P. upgrade, Caltracs trac bars, and custom tuned by Troyer performance. Plus a ground force 2-4 drop And 22" Roush wheels with 305/45R22 tires.



In the spring I am putting on my e-fans, LT headers and a full magnaflow exhaust with x-pipe and true duals.



When I went from 20" wheels to 22" wheels, I felt a little bit of a performance drop. I have 3.73 lsd gears now. Trying to decide on 4.1's, 4.3's or 4.56's. And might try a locker, any suggestions?



Thank in advance for your help

 

How do you drive the truck?

Do you race in the 1/4?

My 4.11's with 28" slicks are right on the ragged edge of RPM at the end of the 1/4....

 

Right now the truck is my DD, and I haven't had it on the track yet. I plan on it in the spring. Right now, I get an average of 13 mph beteen the city/hwy driving. even if my milage goes down a couple I'm fine with that. Plus my tires are 32" tall

Fatherford; how much power does your truck have? whats your times in the 1/4? What kind of milage do you get with your 4.11's? Plus your truck looks good

 

I run 4.11's with a 32" tire as a daily driver and a 28" at the track. Cross the traps at 5200rpm and change. Great combo. The 4.11 performs great. Love my caltrec bars too. Avg 14-16mpgs.

 

I run 4.11's with 30" tires daily, 28 slicks at the track. Crossing the traps around 5400. With 26" tires I was bumping the rev limiter before the finish.

I'm at 460ish rwhp on my 93 octane tune, and 500 on my 93/100 mix. I haven't been to the track since the 460 tune though. I average around 12-13 around town, and 19-20 on the highway.

I am in a regular cab pickup, so I have a few 100lbs difference over twinscrewd, which is why we are slightly different I would imagine.

I was debating switching back to 3.73's, but I'm hoping after an engine swap I can go to 6500rpm.

 

Is that Highway milage? or a combo between city an highway

 

Combined.