JohnC

Educate me on the L99 Chevy 6.2L

87 posts in this topic

9 minutes ago, gammey4 said:

You need a tune. Short term/long term trims of +/- 4% are what you generally shoot for. Yours are all over the place. Your pulling 10% fuel at idle, midrange adding 7-9%, wot looked pretty good. If the calculated airmass is being reported wrong it will also throw the timing off as well. Looked like you have about 11 degrees at idle.

Ahh. Thanks. :up:

Guess I'll park it until I get some mods so I can tune it all once.

Probably do LT's, high flow cats, cam and delete AFM/DOD.

 

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Ahh. Thanks. :up:

Guess I'll park it until I get some mods so I can tune it all once.

Probably do LT's, high flow cats, cam and delete AFM/DOD.

 

I'm not saying to park it. Bring it over sometime and I'll plug it in with my hp tuners and we can run the scanner.

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40 minutes ago, gammey4 said:

I'm not saying to park it. Bring it over sometime and I'll plug it in with my hp tuners and we can run the scanner.

Sounds good. I'll PM you on my next days off. I work this whole weekend.

Where area do you live in?

 

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1 hour ago, gammey4 said:

You need a tune. Short term/long term trims of +/- 4% are what you generally shoot for. Yours are all over the place. Your pulling 10% fuel at idle, midrange adding 7-9%, wot looked pretty good. If the calculated airmass is being reported wrong it will also throw the timing off as well. Looked like you have about 11 degrees at idle.

Is there fuel trim at WOT? 

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Is there fuel trim at WOT? 

No fuel trims are ignored in power enrichment. His "generous use of throttle" fuel trims looked good. I doubt he entered pe though. It usually has a delay built in.

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So the computer does not adjust fuel trim at WOT.   Didn't Caddy alter fuel trims at WOT a few years ago,  or am I mistaken?   They did have widebands, right?

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So the computer does not adjust fuel trim at WOT.   Didn't Caddy alter fuel trims at WOT a few years ago,  or am I mistaken?   They did have widebands, right?

Once your in pe the computer commands a richer afr than stoich. The narrow band o2's would be useless. Some gen3 ecms would carryover the ltft if it was a positive number. I think the 2.0 turbo lnf had a factory wideband.

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11 hours ago, gammey4 said:

Once your in pe the computer commands a richer afr than stoich. The narrow band o2's would be useless. Some gen3 ecms would carryover the ltft if it was a positive number. I think the 2.0 turbo lnf had a factory wideband.

Do you mean carry over into pe at WOT?  I only mess with diagnosing stock stuff, and I've not yet seen a car that stays in closed loop at WOT.

And just tell John to trade for that other Camaro. ;) 

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Do you mean carry over into pe at WOT?  I only mess with diagnosing stock stuff, and I've not yet seen a car that stays in closed loop at WOT.

And just tell John to trade for that other Camaro.  

If that last know ltft was a positive number in the last airflow mode on the ve map then it would be applied. Only some of them did, I don't remember which ones. My truck doesn't, it's a gen 3 ecm.

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I'm just wondering if it would be worth it to try and tune it myself with HP Tuners?

http://www.hptuners.com/products/vcmsuite.php

http://www.hptuners.com/order.php

I don't have a lot of free time, so that will make it difficult. That and having no place to really go balls out WOT for tuning unless I hit the track.

With my job, I have to keep a squeaky clean driving record, so I can't play much on the street. :no:

 

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I'm just wondering if it would be worth it to try and tune it myself with HP Tuners?

http://www.hptuners.com/products/vcmsuite.php

http://www.hptuners.com/order.php

I don't have a lot of free time, so that will make it difficult. That and having no place to really go balls out WOT for tuning unless I hit the track.

With my job, I have to keep a squeaky clean driving record, so I can't play much on the street. :no:

 

It's a huge learning curve. If you decide to buy it get it from Motown performance. You get three(iirc) hours free training with a purchase.

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13 minutes ago, gammey4 said:

It's a huge learning curve. If you decide to buy it get it from Motown performance. You get three(iirc) hours free training with a purchase.

Thanks! I'll look in to it. :yes:

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Trying to decide here....

HP Tuners, or one of the SCT tuners....

http://www.hptuners.com/products/vcmsuite.php

I can't tell any differences in what the SCT junk does other than interface. One is a hand held, one is a touch screen, the other works on your iPad/iPhone wireless.

https://www.sctflash.com/products/sct/SCTLWTSP/sct-livewire-tsplus?vehicleYear=2010&vehicleMakeId=2&vehicleModelId=37&vehicleEngineId=84

https://www.sctflash.com/products/sct/SCTITSX/sct-itsx?vehicleYear=2010&vehicleMakeId=2&vehicleModelId=37&vehicleEngineId=84

https://www.sctflash.com/products/sct/SCTX4/sct-x4-performance-programmer?vehicleYear=2010&vehicleMakeId=2&vehicleModelId=37&vehicleEngineId=84

Looks like the SCT would be less control and adjust ability, but it would be simple. Just disable DOD, and then select for intake and exhaust. It should have a decent base tune to get me by until I can hit a dyno.

The HP Tuner would be a learning curve. No telling how long it would take me to figure out how to disable DOD and do all the fuel and spark adjustments with my work schedule and OT. :lol:

Hmm...

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I will say that the HP tuners is not easy to use.  I feel pretty comfortable with aftermarket efi, but the HP tuners is too much for me to want to learn.  That's why I took it to someone who has an excellent track record with it.  There are multiple ways to do the same things in it, but some are better than others.  I think you would be selling your mods short trying to tune it yourself.  I don't trust many other people to work on my car, but this was an area that I had to go to a pro.  The engine tune has a huge effect on how the 6L80e trans works.  If someone changes the wrong things in the engine tune, it can easily kill the trans.  

If you have to choose, the HP tuners is the LS standard.  I'm not sure I've ever heard of anyone doing SCT on an LS.  I have HP an HP tuners pro that my friend let me use credits on.  But I don't think I'll need it much now that the major tuning is done.

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7 minutes ago, Mike said:

I will say that the HP tuners is not easy to use.  I feel pretty comfortable with aftermarket efi, but the HP tuners is too much for me to want to learn.  That's why I took it to someone who has an excellent track record with it.  There are multiple ways to do the same things in it, but some are better than others.  I think you would be selling your mods short trying to tune it yourself.  I don't trust many other people to work on my car, but this was an area that I had to go to a pro.  The engine tune has a huge effect on how the 6L80e trans works.  If someone changes the wrong things in the engine tune, it can easily kill the trans.  

If you have to choose, the HP tuners is the LS standard.  I'm not sure I've ever heard of anyone doing SCT on an LS.  I have HP an HP tuners pro that my friend let me use credits on.  But I don't think I'll need it much now that the major tuning is done.

Who did your tune?

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Trying to decide here....

HP Tuners, or one of the SCT tuners....

http://www.hptuners.com/products/vcmsuite.php

I can't tell any differences in what the SCT junk does other than interface. One is a hand held, one is a touch screen, the other works on your iPad/iPhone wireless.

https://www.sctflash.com/products/sct/SCTLWTSP/sct-livewire-tsplus?vehicleYear=2010&vehicleMakeId=2&vehicleModelId=37&vehicleEngineId=84

https://www.sctflash.com/products/sct/SCTITSX/sct-itsx?vehicleYear=2010&vehicleMakeId=2&vehicleModelId=37&vehicleEngineId=84

https://www.sctflash.com/products/sct/SCTX4/sct-x4-performance-programmer?vehicleYear=2010&vehicleMakeId=2&vehicleModelId=37&vehicleEngineId=84

Looks like the SCT would be less control and adjust ability, but it would be simple. Just disable DOD, and then select for intake and exhaust. It should have a decent base tune to get me by until I can hit a dyno.

The HP Tuner would be a learning curve. No telling how long it would take me to figure out how to disable DOD and do all the fuel and spark adjustments with my work schedule and OT. :lol:

Hmm...

Get it tuned by someone with hp tuners.

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On 1/31/2017 at 1:35 PM, Mike said:

http://www.shortuning.org/

 

I also think Shannon Taylor at Boost Addicts could also do an excellent job on your car.  He used to be a member of tennesspeed.

I'm going over the game plan now.

LT's, high flow cats, DOD/AFM delete kit, VVT cam and then a tune should be a good start.

Keeping VVT because I want to keep that red-light to red-light 0-60 tq-monster if possible. :D

It'll take some OT to get it done, but I'll get there eventually. :yes: 

Major mod down the road might be heads or boost. Just depends on how much cash i can scrape up. I'm no baller, but ramen noodles is doable for max rwhp. :rofl:

 

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Well, since the old GT stayed stock for 21 years, this one might take a while to mod.

You might want to click my garage and look at that mod list.

Full aluminum block pi swap, 4r70w to Tremec 3550 swap, 3:73's and on....

Sent from my iPhone using Tapatalk

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Well the PI swap was kind of needed after the giggle gas mishap.

You had almost and entire 5.4 DOHC swap but you sold it. :(

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You might want to click my garage and look at that mod list.

Full aluminum block pi swap, 4r70w to Tremec 3550 swap, 3:73's and on....

Sent from my iPhone using Tapatalk

I'm trying to help you get some money

Sent from my SM-G930V using Tapatalk

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