Thread Tools Display Modes
Old 12-30-2014, 08:36 PM   #1
Junior Member
Join Date: Dec 2014
Posts: 4
Truck horsepower

What is the best way to improve the horsepower on my 2002 Chevy Silverado 3/4 ton 6.0 engine? Only has 31,000 miles on it. I'm pulling a 2014 Flagstaff 8528 RKWS.

William S Imondi Sr is offline   Reply With Quote
Old 12-30-2014, 09:17 PM   #2
Site Team
acadianbob's Avatar
Join Date: Mar 2008
Location: St. Paul, Minnesota
Posts: 2,985
That's a tough one. Some people will recommend tuning software or exhaust modifications. Unfortunately, those are expensive alternatives for modest gains. And I think that what you REALLY want is increased torque. Some of the engine mods can actually work to reduce torque.

What is your rear axle ratio? Perhaps the truck could be geared down a bit. But if you are already at 3.73 or 4.10, there isn't any room there either.

2018 F250 Lariat 6.2 4X4 w 4.30s, 2018 Wildcat 29RLX
2003 Yamaha FJR1300, Demco Premiere Slider
1969 John Deere 1020, 1940 Ford 9N, 1948 Ford 8N
Jonsered 535, Can of WD-40, Duct Tape
Red Green coffee mugs
acadianbob is offline   Reply With Quote
Old 12-31-2014, 01:39 AM   #3
Senior Member
1l243's Avatar
Join Date: Feb 2011
Posts: 466
Tuner won't do much for gas motor. Air Intake and exhaust is about all you can do..I don't think the power increase will be worth the money.

Your Rig is a low mileage rig to say the least and you can get top dollar for it. You could consider selling and getting a diesel where Tune mods make a big difference not only in motor but shifiting as well...
1l243 is offline   Reply With Quote
Old 12-31-2014, 06:19 AM   #4
Senior Member
Join Date: Apr 2013
Posts: 268
I would say it depends what you want to spend.

cam, ported heads, headers and exhaust will get you a good increase. look at the edelbrock e force super chargers too!

if you arent looking at spending alot (10k) dont waste your money on tuners.
jgroff is offline   Reply With Quote
Old 12-31-2014, 07:20 AM   #5
Torch's Avatar
Join Date: Jul 2014
Location: Colorado
Posts: 93
What a lot of people do is a mistake, free flowing exhausts etc might increase upper rpm horsepower but it will be at the expense of torque.
Torch is offline   Reply With Quote
Old 12-31-2014, 07:55 AM   #6
Senior Member
zs325RES's Avatar
Join Date: Jan 2013
Location: Byron Center, MI
Posts: 337
Torch is spot on regarding exhaust and torque. This is especially true for the GM 6.0 on your truck which is an LQ4, a version of the LS engine.
I have the same in my 2006 2500HD and am pretty impressed with it in the stock setup.
I just sent my ECM out to get reflashed by Black Bear Performance. Along with my added cold air intake, I'm expecting a 50 hp gain in the low to mid rpm range. These engines are severely detuned by the factory to meet emission standards, so there is much to be gained with a proper tune. The tune includes reconfiguring the transmission settings for better torque management as well.
A pretty good investment for the money IMO.

Sent from my iPhone using Forest River Forums

2013 Crusader 325RES Touring Edition
2006 Silverado 2500HD LT SW ECSB, 6L LQ4/4L80E 4.10s w/16K Curt slider (not necessary), Air Lift bags & Black Bear Performance tune & CAI

Norm & Karen Zondervan
zs325RES is offline   Reply With Quote
Old 12-31-2014, 07:56 AM   #7
Moderator Emeritus
MtnGuy's Avatar
Join Date: Sep 2008
Location: Shenandoah Valley
Posts: 9,273
I have had to delete several threads that had no reference to the the OPs question. He specifically asked about a Chevy engine.....not Ford, not Dodge.

Let's keep the thread on track with Chevy answers.

Chap , DW Joy, and Fur Baby Sango
2017 F350 Lariat CCSB, SRW, 4x4, 6.7 PS
2017 Grand Design Reflection 337RLS
MtnGuy is offline   Reply With Quote
Old 12-31-2014, 09:41 AM   #8
Phat Phrog Stunt Team
AquaMan's Avatar
Join Date: Apr 2012
Location: Tipp City, OH
Posts: 6,815
I was never impressed with my 2006 6.0L. While it had power, I thought it was lacking by today's standards, with only a little over 300hp. My biggest complaint was in the transmission though. Always searching for a gear, and while it had power to pull, the transmission was constantly downshifting, and high revving the engine, which drove me crazy. Pulled my 7200lb TT one season with it before I traded it in. I do believe you could do some valve work and tuning on the trans to make it better, I had great results with Level 10 upgrades in the past. Getting the power to the ground has better results than increasing the power.
2016 Georgetown 364TS
2017 Jeep Rubicon Recon toad
Nights Camped 2018 - 7
AquaMan is offline   Reply With Quote
Old 12-31-2014, 10:37 AM   #9
Ret E-9 Anchor-clanker
donanddona's Avatar
Join Date: Jul 2012
Location: Genoa, ILL
Posts: 1,451
Don't know what the ratio is in the rear axel but have you thought about lowering it?
Don & Dona W/yorkies Gizmo, Master Chief, & Tali
2011 Flagstaff 8528 BHSS 2015 Ford 6.7 XLT
2010 Full Timers & Still Going
donanddona is offline   Reply With Quote
Old 12-31-2014, 10:48 AM   #10
Moderator Emeritus
Dave_Monica's Avatar
Join Date: Sep 2007
Location: Ontario, Canada
Posts: 4,329
I'm surprised that you're unhappy with that combo...I had the same floorplan in a Rockwood and towed it for 2 years with a Hemi Ram and I was adequate for power.

What you really what is increased torque...lower RPM even better. Increased horsepower usually increase torque too but usually increases the RPM which peak torque occurs. Increasing the axle ratio has the same effect as increasing the engine torque and would be relatively inexpensive unless you have a 4x4. If you're thinking that you need more power to be able to maintain speed regardless of the grade, you should probably change that expectation.



Nights camped in 2013 - 55, 2014 - 105, 2015 - 63
Dave_Monica is offline   Reply With Quote

power, truck

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Featured Campgrounds

Reviews provided by is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 08:41 PM.