>Dave, I'm just using the regular 3" superflow on my Dak. Though the 3" is
>fine on my 5.2, my feeling is the 2.5" would be more appropriate for the
>4.7. It's a smaller engine and I'd want to maintain more low end torque,
>especially in a heavy truck. My plan for my 4.7L Grand Cherokee is to
run
>a high-flow 2.5" cat and the 2.5" Gibson cat back, single outlet.
>
>My Jeep, with it's only mod being a K&N FIPK at this time, has run the
>quarter in 15.40 @ 85 mph with a 2.08 60' time. That's at 4300 lbs with me
>in it and with full-time 4-wheel drive. It'll outrun most stock Mustang
>GT's in the 1/8 mile, thanks to the low end torque and gearing, but runs
out
>of steam after that. Just consider what most of your driving will be like.
>Probably not much high rpm stuff, right?
>
>RayB
Yeah, no racing or anything...although the way I drive it'll seem like
racing :) I hear the 4.7 revs higher than my 5.9 tho. I'm definitely
looking to keep all the low end grunt that I can, especially since I'll be
going up to 33" tires.
-Dave
This archive was generated by hypermail 2b29 : Fri Feb 06 2004 - 11:46:12 EST