Making the Yukon Faster

[Mondo]

Hey all,
Staright to the point i have a yukon xl with a 5.3 vortec and 4L60E trans. I am wanting to make it a little more jumpy. I have the basic k&n cold air intake kit and then Flowmaster exhaust. I also have an edge cts 2 tuner.

Even with the tuner i notice a decent amount of power increase but i still cant seem to get enough power to even spin my tires unless im accelerating out of a turn. But like burnouts i just cant seem to get it.

What would you recommend i do next to get some more power out of it.
I know i cant take the biggest fattest pig out there and make it a race car lol but i would like to get more out of it.

Ive been thinking of gear swap.
Torque converter
Corvette servo

What do you guys think.
How can I gain more power

 

[drakon543]

If all you have atm is an intake and cat back exhaust and a tuner you have plenty of options. If you have the cash and you want to do one big item have a turbo setup bolted on. If you prefer to go easy with one part at a time you can have a set of headers put on. Unless your truck has the low gearing id leave the gears alone for now and no reason to mess with the torque converter till you start making bigger numbers. A shift kit with the servo upgrade will help get the power down faster. You could also have a cam swap done. With headers and or a cam id go above the edge tuner tho and have a custom tune done.

 

[Mondo]

Im looking into a magnusun supercharger atm. But how much can I gain from just headers? And what about a Cam? And how much would they run.

I am ordering the corvette servo tomorrow most likely and do you think a shift kit will help much more after the servo?

Sorry im no pro when it comes upgrading.

 

[Countryboy07]

Cam swap, long tubes, and a custom tune from black bear. If you still want more after that, it's time to start looking into forced induction.

 

[Mondo]

got any details about a cam swap

 

[hec.deli]

I've seen a Denali with a supercharger online roaming around doing a few burnouts. Think would be a good step forward for more power. Honestly I do not know what else it had changed under the hood but seemed to leave plenty in the dust on the strip...

 

[Mondo]

Probably had a line lock or tune because stock the rev limiter is set to 1800.

 

[drakon543]

As far as a cam swap your best bet is to pick a good brand easy choice would be comp cams. Give them a call and ask for a direct swap cam. They will tell you exactly what you want. Or find a good performance shop around your area and go to them and they will take care of all the hard decisions for you. If all your looking for is to be able to do smokey burnouts and give it more punch upgrading the trans, cam, headers, and custom tune will get you what you want. If you want to go all out go straight to forced induction with a cam to match headers and custom tune.

 

[Countryboy07]

got any details about a cam swap

I have not personally done a cam swap, yet, but the LS based motors are super simple to work on. When choosing a cam, it's best to call a few different cam companies and tell them what you want, they can spec out the best cam for you.

 

[Mondo]

Ya not looking to make it a drag truck but want it to be faster off the line for the occasional time i do take it to do drags at my local 1/8th mile drag. Im doing high 10s right now. So forced induction being last on the list due to price. Im thinking trans and headers for right now and maybe a cam. Can anyone give price estimates on these things

 

[Countryboy07]

All that I have mentioned should be right around $1200 in parts.

 

[Countryboy07]

Here is some reading material for you:

http://www.gmfullsize.com/threads/cam-thread.43041/

http://www.gmfullsize.com/threads/how-to-link-for-cam-installs.256694/

 

[bottomline2000]

That's funny he linked that thread as I was going to recommend the Vinci Trucker cam. I like how the torque comes on with this cam it feels like a big block but doesn't run out of breath up top. It did shift my power band up slightly but that why I did the 2800 stall and with the 6.0..she gets out the hole nice and I spun the tires once but didn't like the sound my posi made. I have 3.42 gears and will probably go 4.10 and a better locker.

I think the rule on stalls is to stall 500rpm above where the cam starts making power. 2 things I've heard guys reget is going too small on their cam or too big on the stall..I think I'm borderline on what I would want in a dd stall, but the cam is great dd and weekend warrior..

Sent from my SAMSUNG-SM-G900A using Tapatalk

 

[Mondo]

I have 3.73 on mine and am wanting 4.10s but i do 75 pretty much 80% of my driving so i fear my mpg is gonna bet much worse possibly.
Thoughts?

 

[Countryboy07]

IMO, you won't notice much difference going from 3.73 to 4.10's. Plus it really wouldn't be worth the money for such a nominal difference. I'd save your money for other areas of the vehicle and the swap gears down the road if you still aren't happy with the of the line performance

 

[Mondo]

Ive heard alot of people say just gear swap is enough to let you be able to burn rubber. What if i did like 4.20s?

 

[drakon543]

Well i dont mean to be mean about this but what is your fascination with being able to do a burnout? My syster had a 3cyl geo metro i could smoke the tires with. Anyway going from 3.73 to 4.10 might allow you to break the tires loose but as countryboy stated its not a huge jump so you probably wont be happy with the amount of money you spent to do it. Get some more stuff done before you decide to go with gears.

 

[02DFWTahoe]

Yea hold off on gears. Do you have torque management disabled? Headers alone can run anywhere from $350-$1500. You will definitely need to do the tranny if you decide to go FI. Cam and headers could net you 50-75 rwhp while maintaining drivability without a big stall.

 

[Mondo]

sadly my tuner the edge evolution cts 2 doesnt have torque or rpm settings. i know if it wasnt for those 2 things i know i could break them loose. But besides breaking them loose i just want to be a little faster

 

[01ssreda4]