2010 6.2L/6L80 Sierra bolt on results (stock CAM)
 

I swooped by the dyno today made 367rwHp/390rwTq. Gained 44Hp @ 5,200rpm and about 40rwTq across the board after adding headers, UD pulley, and dialing in AFR/Spark with a personal tune... I was turning clod hopper 295/45/22's during both runs...

Top run: AFE Intake, 1 3/4'' AR Headers, 3.5'' Gibson Exhaust, UD Pulley, personal tune

Bottom run: (April 2010) Varram Intake, 3.5'' Gibson Exhaust, stock tune

http://i207.photobucket.com/albums/b...vs_headers.jpg

Lookin good!

those are some awesome numbers from very little mods. Im about to bite the bullet on ordering a 2011 ext cab 2wd, 6.2/6l80e combo with 3.73 gears. Is yours a 2wd, and how are the 3.42's with the 6 speed. Im getting tired of modding the hell out of my 5.3 ls1, and losing mpg and gain very little.

Yes it's 2wd... 3.42's go well with the A6,1st gear is so steep it's like having 4.10's on a 4spd. My tires are 32.6'' tall and i'm done with 1st gear by 40mph shifting @ 6,100rpm. Fuel economy sucks in town but I make some of that back on the hwy (12city/20hwy@70mph), With the latest mods I can break 1st gear loose anywhere in the powerband, even if I walk her our slow to 28-30mph b4 100% throttle in 1st...I'm good on gear until I can hook what I have...lol!

These tires are usless when the temps are cool/good for making power...

VERY nice #'s, Mark.

Patrick G will be dyno tuning mine with wide band in two weeks, hoping for results as good as yours. Though - I don't have BH (before headers) numbers to compare to.

What kind of dyno did you do your pulls on?
EDIT: never mind - I see it was on a DynoJet dyno. I believe that Pat G. uses a Mustang dyno, so a direct comparison to your #'s won't be possible.

Thanks...

Yea, I see DynoJet's read higher than a Mustang dyno...Shoot i'm just a DIY tuner, Pat G may be able to unlock some real ponies..please share when you are done...

Good numbers man! Where u been hiding? Havent noticed u on here in a while...

:stupid: you've been hiding man! i need to go back and get my truck dyno tuned since i have the 6.2/6spd swap finished. im running 4:10s though...i may go back to a 3:73 one day...we'll see. i have a bigger cam than you but im running 3" exhaust :(

wut up man thanks...been workin a bunch waiting to get this thing back to the track to post some good times..

I went to No Prob Wed Dec 8th for test n' Tune, those mofo's were closed due to cold weather. In Louisiana, really? I shoulda called...but i'm a dumb ass..

wut up, yea long time no post...Look you see how much Tq my little 1.75'' pipes are putting down? I only need 10 more to break 400rwTq on the dyno, do you have some 17's or 18's I can borrow...lol? I wish the dyno would have read below 4k where my gains feel strongest...burnouts on demand...woot woot

Hey what's a good street tire that still does ok at the track? My 22's gotta go need more grip and less weight...dis bitch will see 12.999 on stock CAM, it's going to take some new shoes or maybe some slicks :rock:

U got 4:10's on a 6L80, Damn Hoss? Does 1st gear feel useless at times for daily driver?

nice work Mark, I ve been wondering where you have been as well.
General uhp's should be a good tire for you.
Any comments on the afe vs vararam? I still haven't changed mine.

hey allgonoshow, how well does your 6.2/6l80e/3.73's work on the street. Sorry to hijack the thread a bit. a 3.42 seems like a pretty good choice, i would imagine the 3.23 gear would be similar to a 4 speed with 3.73's.

Mine has the max tow pack, so came with 3.73's.
My summer tires are yoko spec x, 285/50/20.
It will break em loose a bit, but not alot from a dig and chirps em on the 1-2 shift.
Sounds like Mark may have a better tune dialed into his.
3.73 should be better from a dig.
Where it shines is 2-3000 rpm kick downs, absolutely rips on a wot application 60 mph and up.
Tows well too.

The Vararam is nice when ur @ cruising speed but those 5'' scoops also soak in heat when you parked or idling. IAT's are lower with the AFE, especially coming out the hole...

36-38mph but i shift at 6500....im still in the tuning process. i need to see where i like my truck to be and such. i have 17s and DRs which onces you wanna borrow :jest: if i dont like the 4:10s imma go up to 3:73s.

i still want 1 7/8", i like the 3500+ punch :devil:

I see, that top end CAM extends your time between shifts...It's all about matching parts...If I had shorter intake runners like on a Camaro I would have gone 1 7/8' or if I wanted a top end CAM like you...

Hey, yall going to No Problem when they open back up?

Would be interesting to do a direct, back-to-back comparison on the same dyno.

Compared to your deal - I'm running larger tube headers, but no UD pulley, stock cat-back and stock thermostat. I'm also running LARGE, heavy tires - P305/50's on Yukon 20s.

I have been considering letting Pat G spec a VVT cam for me . . .

I too would LUV to run a 12.999 with stocker cam, but don't believe that will happen without a high-stall converter. I'd like to scale my truck - both times I've raced it the scales were closed. :mad: GUESSING 5800# with my fat butt in the seat.

I know it's a LONG trip from Lafayette, but I'm going to Nelson's truck race at San Antonio Raceway in February . . . any way you could make that?

EDIT: Mark - what have you set your WOT upshifts at?

Yes it would be nice to do a back to back comparison to see what these trucks like and share with everyone else. The only way to get this brick out the hole on stock stall is bottom end, that's what i'm playing around with now using the 1 3/4's and VVT. If I can nail some 1.8 60's it may be worth 12.999...We shall see if my finesse foot is up to the challenge...I'm gonna have to find a lighter, shorter, and sticker wheel/tire combo...

My 1-2 upshift is set for 6,100 rpm, 2-3 is 6k rpm. I finish the 1/4 at roughly 5,800rpm in 3rd. My 3-4 is also 6k rpm when i'm feeling brave... After each shift i'm landing 200 rpm b4 peak Tq approx 4,200rpm...

No can do on San Antone... I may be around Houston soon...

UGH, make me want a 6.2 SOOOO BADDD

Thanks for the WOT upshift info - I'll prolly have Pat G set mine at 6K as I worry too much about bent pushrods rocker needle bearings falling out, LOL!

Damn - 1.80 60s??? I wish, LOL! Admittedly before any tuning, my 60s at Nelson's deal last Feb were in the 2.2s - and back then I was running the stocker 275/55 tires!!! I suppose I need to borrow some 17s with decent tires for the track . . .

If'n I run it with my current 305 tennies, I'm hoping like he!! I can run a mid-13.

I think you covered on mid 13's unless you can't hook or the DA is bad for power...

Hope you're right, Mark!

I've had no problem hooking up at the track - on the street, well that's another story, LOL.

Weather (and DA) SHOULD be pretty good at SAR in Feb.

Lloyd, I should have my truck back by Sunday and can get in touch and possibly swing by your side of town if you'd still like me to.

Sounds good, however . . . lately my 89 YO Mother has been VERY ill, and I'm "on-call" 24/7. We came "this close" to losing her yesterday from low BP, but refuses to go to the hospital - can't really blame her as the last time she was admitted THEY darned near killer her.

Anyway - I'd better take a rain check on seeing and riding in your SD. I'll keep in touch, and please do the same.

Thanks!

nice work. i know how to get ya 400ft lbs
:)

How is that?

If someone runs a 12.9 with a stock cam 6.2 6spd with no power adders I think I know what my next truck will be :D

Area47's Extended cab 6.2L ran a 13.32@103mph on 17's, I bet that's close to 12.999 on slicks... He had Kooks headers, stock exhaust w/muffler swap, stock intake w/k &n drop in filter, and a personal tune. UD pulley should gain him another 1/10th...and who knows what a full exhaust and aftermarket intake could add him with some cool weather...

they def run good.. Now if I could make my self like the nnbs trucks.. I can't stand the interior imo .. But I would love to have a extcab with the short crew box with the 6.2 and 6spd

Sounds like Mark and Area47 would BOTH be there with a torque converter swap!

Damn . . .

damn! impressive! its tough to keep mine stock haha

Must resist selling my truck.. Must Resist

These 6.2 motors are amazing!

mark, e85 + cranked timing = torque.

full bolt ons in my truck would get 12's.
or

4.10's and drag radials would get it really close. i can't go wot with the 373's till about 10 ft out.

I wish only E10 around here....

ohhhh you're so missing out!

Were you running E85 on your 13.3 pass? Yea, E85 and some 17's would have me near 410rwTq...

We have SOME E85 available here in Houston, but alas my '08 isn't FF compatible . . .

Somewhere I've read (on the GM Powertrain website IIRC) that the export L92 trucks were tuned for 95 octane fuel - and rated 441 HP!

Wait up???...An American company giving it's peeps de-tuned crap :devil:

yep. it spends the summer/fall on e85. which in comparison, equals out to an intake and UD.

How much spark can you run @ upper rpm with e85?