4.8 L/lr4/engine mods

[bwilliams21]

I have an 01' GMC sierra with a LR4 motor, full exhaust-k&n FIPK-superchip, looking for some engine mods maybe a better cam, still kind of new to these vortec motors it looks very complicating uunder there. any suggestions?

[Jamest]

<div class='quotetop'>QUOTE(bwilliams21 &#064; Jan 24 2007, 08&#58;00 PM) [snapback]81100[/snapback]</div>

I have an 01&#39; GMC sierra with a LR4 motor, full exhaust-k&n FIPK-superchip, looking for some engine mods maybe a better cam, still kind of new to these vortec motors it looks very complicating uunder there. any suggestions?
[/b]

DITCH THAT SUPERCHIP AND GO WITH A NELSON TUNE FROM NELSON PERFORMANCE, ALLEN WILL SET YOU UP. HAVE YOU THOUGHT OF A LOWER REAREND GEAR? WHEN YOU SAY FULL EXHAUST DO YOU MEAN FROM THE HEADERS TO THE TAIL PIPE? WHAT ARE YOUR PLANS WITH THE TRUCK?

JAMEST

[bwilliams21]

<div class='quotetop'>QUOTE(Jamest &#064; Jan 25 2007, 11&#58;31 AM) [snapback]81167[/snapback]</div>

DITCH THAT SUPERCHIP AND GO WITH A NELSON TUNE FROM NELSON PERFORMANCE, ALLEN WILL SET YOU UP. HAVE YOU THOUGHT OF A LOWER REAREND GEAR? WHEN YOU SAY FULL EXHAUST DO YOU MEAN FROM THE HEADERS TO THE TAIL PIPE? WHAT ARE YOUR PLANS WITH THE TRUCK?

JAMEST
[/b]

I just want to give it a little more balls nothing spectacular, i was thinking like maybe a 3.43 posi. Can i use the same Pumpkin if i put lower gears in it. header down, stock cats tho.

[Blackdog]

Yea you can use the same pumpkin. I installed 4.10s and an auburn locker in mine. Woke it up tremendously. I also have slp headers and that made a big difference also. The sky is the limit and its all in what you want.

[andymish]

I have an 01' GMC sierra with a LR4 motor, full exhaust-k&n FIPK-superchip, looking for some engine mods maybe a better cam, still kind of new to these vortec motors it looks very complicating uunder there. any suggestions?

<div class='quotetop'>QUOTE(bwilliams21 @ Jan 24 2007, 08:00 PM) [snapback]81100[/snapback]</div>
DITCH THAT SUPERCHIP AND GO WITH A NELSON TUNE FROM NELSON PERFORMANCE, ALLEN WILL SET YOU UP.

That looks like an interesting idea of modifications for the Sierra. Well, my uncle is also planning to do some modifications of his Sierra to increase it's performance. At first, he was having a thought of getting a superchip but having read what Jamest said, it's better to hook up a nelson tune. Anyway, I'm gonna let my uncle know about this so he could check it out. Thanks for sharing some suggestions.

[kerrige]

I have an 01' GMC sierra with a LR4 motor, full exhaust-k&n FIPK-superchip, looking for some engine mods maybe a better cam, still kind of new to these vortec motors it looks very complicating uunder there. any suggestions?

Custom tune. Nelson is a very popular choice. Gears and Posi are a good investment but common recommendation would be a trutrac with 3.73 or all the way up to 4.10 After that bang for your buck Ebay has some nice headers for very little $ add a magnaflow straight thru 3'' and losing the cats is a good idea. After that a 3k stall from Circle D. You should be moving after that.

Edit: just noticed you already have an exhaust my bad.

[Razgriz1]

My 4.8 with the mods listed in my sig got me in the 13's

[cjriojas]

<div class='quotetop'>QUOTE(bwilliams21 @ Jan 24 2007, 08:00 PM) [snapback]81100[/snapback]</div>
DITCH THAT SUPERCHIP AND GO WITH A NELSON TUNE FROM NELSON PERFORMANCE, ALLEN WILL SET YOU UP. HAVE YOU THOUGHT OF A LOWER REAREND GEAR? WHEN YOU SAY FULL EXHAUST DO YOU MEAN FROM THE HEADERS TO THE TAIL PIPE? WHAT ARE YOUR PLANS WITH THE TRUCK?

JAMEST

Just reiterating this point. Ditch the supercrap and get a live tune. best mod period! When you say full exhaust, does that mean you have LT headers? Also, these engines are no more complex than any other motor. 3.42's will do little for you performance wise.