Tunes for the 07's?

HuntingEd · January 24, 2007

First off, want to say hello, I just joined today, but have been reading your posts for a while now. I recently ordered the new Silverado Crew Cab, 6.0L Max, 3.73, Z71, etc...

After reading all the edmunds reviews and some of your posts Im worried my truck is going to have a bad throttle response. I was just curious if anyone has put any tunes on their new trucks and whats available for the new trucks yet.

thanks

Big Tool · January 24, 2007

Man plese don't worry at all. you're truck is going to have plenty of throttle response. The 6.0 has tons of power. You're butt o meter will tell you more than the dyno trust me. Will you take a new tundra in the quarter stock. probably not, but believe me the 6.0 will fly for a pickup.

cerbomark · January 25, 2007

A good tune will eliminate any throttle delay set in the PCM. I have not looked into who is doing them yet but there will be plenty of people doing the 07 soon. Bryan from pcmfor less was not doing the 07 s as of a month ago, SOON!

cerbomark · January 25, 2007

Just spoke to bryan from pcmforless(who tuned for me before) and he will be getting 07 tunes soon and will notify me. Anyone near northern NJ who is interested can PM me and he will likely meet us and do the tunes in person if we can get a few trucks of any year that want a tune. The throttle delay is called an enrichment delay ,is removed according to bryan.

svensk · January 25, 2007

Why the heck did edmund's 6.0L dyno in the 270's??! That sounds more like they dyno'd a 315hp 5.3 instead.

crepitus · January 25, 2007

im in nj and may be interested in a tune for my 06. let me know.

Butch 02 Denali · January 25, 2007

im in nj and may be interested in a tune for my 06. let me know.

If you're anywhere near Toms River NJ look up Tune Time Performance. He has a brand new Mustang AWD dyno and is a flashing dealer for Wester's tunes plus his own tuning. Wester's tunes for the 07 LS2's/Canbus trucks have been available for about 4 months now. Ask for Matt http://www.tunetimeperformance.com/

HuntingEd · January 25, 2007

Hey guys, thanks for the replys, I just couldnt find a VMax to test drive, Im currently in a 03 Ext Cab Z71, 5.3. (anyone interested in buying let me know, mint condition less than 30k.)

Anyway, just wanted to hear what you guys think of the 6L.

thanks

DanMan_S · January 25, 2007

Why the heck did edmund's 6.0L dyno in the 270's??! That sounds more like they dyno'd a 315hp 5.3 instead.

This explains it in the article (they couldn't measure peak torque properly as it falls within the 4 seconds of doom):

Although the spike resulted in a peak of 297 hp at the wheels — about right for the rated 367 hp at the flywheel, once drivetrain loss is factored in — the Silverado's measured power appeared to be underachieving everywhere else in the rev range.

In fact, the Chevy produces significantly less power than the Titan for the duration of the dyno test until the Chevy finally surpasses the Titan's peak of 291 hp at the wheels.

As it turns out, the explanation boils down to an engine calibration strategy. GM calibrated the 367-hp 6.0-liter V8 to remain in stoichiometric "closed-loop" fuel delivery mode for 4 seconds after the throttle is floored. This fueling strategy helps keep emissions in check (and saves fuel) at the expense of reduced power — about 40 hp less at the peak. Once the driver lifts his right foot from the wide-open throttle position, the 4-second clock resets.

This explains why the Silverado's power is low everywhere on the graph right up to the jump in power right before redline. Corresponding to the expiration of the 4-second window, the jump in power is indicative of the engine switching to open-loop "power enrichment" mode. It is only when operating in this mode that the engine delivers its full rated power.

DanMan_S · January 25, 2007

Whoops, double post.

Anyhoo, I was planning on ordering a new Chevy Silverado VortecMax but now I'm going to wait until this is sorted out. This would definitely be a purchase killer for me as I want an engine that will actually make it's advertised power ratings. I'm not too concerned with economy as I do live with a gas guzzling Hemi so all of that extra programming would be the first to go if I had the choice.

GeoHawk · January 26, 2007

Why the heck did edmund's 6.0L dyno in the 270's??! That sounds more like they dyno'd a 315hp 5.3 instead.

...As it turns out, the explanation boils down to an engine calibration strategy. GM calibrated the 367-hp 6.0-liter V8 to remain in stoichiometric "closed-loop" fuel delivery mode for 4 seconds after the throttle is floored. This fueling strategy helps keep emissions in check (and saves fuel) at the expense of reduced power — about 40 hp less at the peak. Once the driver lifts his right foot from the wide-open throttle position, the 4-second clock resets.

This explains why the Silverado's power is low everywhere on the graph right up to the jump in power right before redline. Corresponding to the expiration of the 4-second window, the jump in power is indicative of the engine switching to open-loop "power enrichment" mode. It is only when operating in this mode that the engine delivers its full rated power.

Wow, this is just retarded. Leave it to GM to design a gem of a motor (L76) and then restrict it so much in the vehicle that it is virtually useless. Oh well, looks like a tune is in the cards for my new truck too. Just wondering if the VVT aspect of the L76 will pose any special problems to the tuners.

Its amazing how much a tune woke up the LQ4 in my 1500HD. It was fun pulling out to pass someone on a 2-lane highway just to have the engine fall on its face because the ECM pulled the timing way back. I guess it's GM's way of protecting us from ourselves.

DanMan_S · January 26, 2007

Wow, this is just retarded. Leave it to GM to design a gem of a motor (L76) and then restrict it so much in the vehicle that it is virtually useless. Oh well, looks like a tune is in the cards for my new truck too. Just wondering if the VVT aspect of the L76 will pose any special problems to the tuners.

Its amazing how much a tune woke up the LQ4 in my 1500HD. It was fun pulling out to pass someone on a 2-lane highway just to have the engine fall on its face because the ECM pulled the timing way back. I guess it's GM's way of protecting us from ourselves.

I wish that they'd give us some 'non advertised' performance options such as a performance computer tune or LS2/LS3 straight from the factory. Just keep it on the down low so the mainstream buyers don't know about it but make it so all of us fellow truck enthsiasts can go in with the extra knowledge and demand a HO motor without all the nanny stuff.

Make it a modern day VHO program. After seeing those dyno charts I'd much prefer getting one of these trucks with a no frills LS2.

ridgekid · January 26, 2007

Geohawk- You saying a tune did not help your LQ4?

I'm looking at tuners, and have the LQ4 but have not decided yet.

GeoHawk · January 26, 2007

Geohawk- You saying a tune did not help your LQ4?

I'm looking at tuners, and have the LQ4 but have not decided yet.

On the contrary, the tune helped immensely. The issues I had were before I got it tuned. The factory ECM programming was holding the engine wayyyy back, not allowing it to reach its potential. After the tune (Just a basic tune from PCMforLess primarily to remove the torque management) it was like a completely different engine. Much better throttle response and firmer transmission shifts.