I have a 2005 f150 with rear mount 70mm turbo and it takes a while to get into boost. Once it’s in boost it pretty much stays there. I had .96 at and changed to .68 and it made a lot of difference was just wondering if I change my rear gear from 3:73 to 4:10 if that would help any? Thanks

 

I don't think it will make a ton of difference. I had 5.3 with a 67mm and 81 ar and it helped incredibly though going from 3.42 to 4.10's. Stock exhaust and mounted in place of the muffler with no tailpipe.

 

Thanks ZO6Ted. If the gear change helps me with low end it would be great. If anyone knows these 5.4 they don’t have any guts down low especially when it’s tuned to boost and not in boost yet

 

You bet. Normally a converter matched to the cam may help more before gears if you can live with it. Also depends on your tires and tire and wheel weight. I had a 10.5" converter that would flash to maybe 2700-2800 as I recall at the time. I switched to the 4.10's and was at only 5-5 1/2 lbs. Went to 4.10's with no changes one weekend to the next and dropped from a 9.54 to 8.90 in the 1/8th and the cam didn't really wake up until about 3500. A world of difference though! I guess it was a dog from a dig because of a 02 ZO6 cam. Truck ran 10.39 stock. Eventually ran time in sig.