Don't know for sure. Charlie tends to sand bag about his set up.

 

Lol ^^^^

 

Im just wondering, i saw where you posted how the 4.8 gets better gas mileage than the 6.0...how good of gas mileage are you getting with a 228/3600 combo in a less than 300 cubic inch motor? Personally, if youre worried about gas mileage i wouldnt be driving the truck daily therefore that tidbit of info would be pointless? Just my .02

 

Also, idk if im just biased or what but i dont really see the point of trying to push a 4.8 na? In the end itll just be cheaper to either go fi or swap in a bigger inch motor. I mean a pretty nasty setup(minus the 4.8) only running 13.5s? Im hoping for less than that with just a small cam 5.3 and 3200 converter, maybe a step up in gear

 

The way I see it is 11s in a 6.0 gets boring too, I really enjoy pushing things to there limits and seeing how fast it gos for what it is, 13.5 is fun to race if it shouldnt be that fast. But once the goal is met I like to move on, we have done a few stock 6.0 swaps into a singe cab and they get 18mpg if they are just tuned, my bros had 4.56 gears and did 18 on a trip.

 

Right now with the longtubes,TR-6's and a wheatley tune I have been getting around 15 MPG outta my 4.8,but I got a heavy foot too.

 

i understand what you mean jake...to me it just seems like trying to set a record for the fastest na 4.8 is like trying to be the best inmate at the county jail...honestly all the record crap is getting on my nerves...i say just build the truck how you wanna build it and go racing, have fun with it. dont be worried about some record....but idk? i never really understood it

 

with my lts, tune and cai, i get like 24 on the highway in my 5.3...to me it seems like the smaller the motor in the same size vehicle, the harder it has to push itself to turn the same weight...? idk tho

 

Seems like I saw something online in lasy year or two about a 4.8 with TFS heads and custom cam running like 12.40 n/a ,but, can't remember where or who it was. I would think it could be done with the right combo and some weight reduction could probably get in the high 11's.

 

I found an old article and it was a guy Charlie from Vengance Racing. 4.8 rcsb with TFS 205 heads and TFS cam specs around 220 @.050. Not sure about converter etc, but said it went 12.80 @110 which sounds like with better converter, suspension etc could have went low 12's.