> -----Original Message-----
> From: jldenning@earthlink.net
>
> Decided to keep my 99 5.2L 4x4 insttead of buying my bud's 05 4.7L
> (actually,
> his bro decided he wants the truck!). So, gotta tweak my 5.2 so that it
> solidly outruns both my buds' 4.7s (all are 4x4, one is OQ).
>
> Mine's stock. Got a good TB but haven't polished it (it's in a box). How
> much
> improvement can I get if I pay a shop 2 or so grand? Gotta have same
> bullet-porof reliability. Any recommendations for shops near Washington
> DC?
>
> Also, I've 3.55 gears and am thinking I should switch to a ratio more
> suitable
> for acceleration and beach driving. ?
>
> Thanks
I can have you outrunning a 4.7 for a lot less than 2 grand. Since you
have a 4x4,if your tires are stock size, go to a 4.10 gear. If they're
larger than stock go with a 4.56 gear. That will be your greatest
improvement.
Forget the polished TB. There's nothing in it. I've tried them all,
including a billet F&B and there's no improvement in performance in a mild
engine. I use a 52mm but then I shift at 6000 rpm along with a lot of other
high rpm mods too! A stone stock TB was good for 13.60s on my 5.2.
Next get a Superchips programmer. Available from www.autoanything.com for
$399 with free shipping. Sorry, you just missed a sale at $310. You can
program for 87 octane or 92+ octane. Your choice.
Next, get a Gibson cat back system. Good improvement in low and midrange
torque there also. Also works fine at 6000 rpm.
Then maybe a FIPK from K&N. Just make sure whatever you get isolates the
air intake from underhood heat.
A 180 degree thermostat may help a little too.
If all that isn't enough, consider a high flow cat and then maybe headers.
But make sure your header choice comes with a mandrel bent crossover pipe.
Without that you're not getting all that's available.
Check out my mods at my dragtruk link but bear in mind they're not
necessarily appropriate for a 4x4 that shifts at less than 6000 rpm.
Ray
http://www.dragtruk.com/ENTRIES/20KM1FD2KWBP.html
.
.
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