Hey Guys,

Thought I would wander over here, especially as I have had thoughts of doing a few tweaks on my truck: 2001 Silverado HD CrewCab LQ4

It is primarily a DD and tow vehicle for my track car, a '94 Z28. however, I can't leave well enough alone and occasionally feel the urge to mod it a little bit. So far I have trimmed the EGR tube and swapped the AC Delco for a K&N airfilter!!! WoW!

Couple questions for the informed membership: Do TB spacers on trucks like mine really deliver much of the claims? ie. a few more ponies and foot-lbs and possibly a little better mileage? Also, for my truck what air intake systems and cat-back exhausts seem to be effective and a decent bargain/bang for the buck?

I know I could search these things, but with the myriad of trucks out there, I'd rather ask directly about what would work on my particular truck and what would work for my particular circumstances (ie. not modded yet and pretty much just a DD).

THANKS in advance.

 

Welcome to the forum.
No to the spacers, they offer no gains. A cat-back and intake will get you ~10hp total and most of us buy them but a drop in filter and muffler swap will probably do as well.
Enjoy the site!

 

Welcome to the truck side!

 

Welcome! There is very little differences in modding a late model truck and a F-body. You just have to take into account that it is a heavy truck and that you do tow with it when it comes time to pick a cam etc...

 

Thanks guys. OK, cross TB spacer of the list of possible ideas. The truck is in nice shape, but has 127K and is never anything that will be remotely fast. Physics are not on my side, plus it is never going to be more than a DD/Tow rig. I just want to see if I can squeeze a couple more ponies and, maybe more importantly, a couple more MPG out of her.

So, the AirRaid and K&N cold air systems are more hype than honest results? A good lid or cold air system is usually good for 10-ish RWHP on my F-bodies (as you guys know). I understand that all of the principles are the same, just want some informed results on what kits have proven to work on them and what has been mostly snake oil.

 

A tune is the biggest bang for your buck on the trucks. IMO

Welcome to the site by the way.

 

Tune is very noticable gains. The stock mufflers are very restrictive if you look at one cut open and you can do your own version of a cold air kit. Cut a hole in the front of the air box or through the bottom and the lower plate (the front is easier). The intake holes through the fender are restrictive. You can fab you own straight pipe to replace the factory silencer assembly on the intake tube to save some bucks.

 

Welcome from VA. Right now I have a 08 5.3 Sierra ext. Cab. I don't have any dyno records to support my claims except for the dyno in the seat of my pants.

I installed a Flowmaster Super 44 catbak. I did notice a slight gain in high RPM's. However, it seemed like I lost a little of my low end torque. But the truck sounds awesome now!

Also, I bought a Diablosport Predator and installed their high octane tune and noticed gains all through the power band. But especially in the higher RPM's. Plus the truck shifts firmer now, which I like.

So there you have it. My humble commentary on these two mods. Hope it helps. I would recommend trying these first along with maybe a Cold Air Intake or a supecharger.

 

Welcome! i recognize your rides from ls1tech, these trucks are not too different from what your used too.
I would do intake, exhaust and a tune(custom is best) and that should help alot, if you have any questions there are plenty of answers here!

 

Thanks for the warm welcome and ideas guys. If anyone has a link to some pics or even a "how-to" on homemade (but clean) cold air ideas I'd love to see it.

Again, I'm just looking for a very mild improvement in both power and efficiency (ie mileage). I understand that leaning out the factory rich fuel curve and perhaps deleting or dialing back the torque management should give the truck a little more performance. However, most of the time I just put 87 octane in it and drive like a grandma. There are entire weeks where the motor never turns above 3K RPM.