Lean% On Brenspeed Tunes?

[anticubicle]

Wondering if someone with an 05+ GT and a Brenspeed tune can fill me in on what % Lean (or Rich) the tune is running at. I've got a Predator and can adjust how lean (or rich) the car is to run via the fuel table and am wondering what those Brenspeed tunes are running @ w/ the Xcal.

Any info would be appreciated.

Thanks!

 

[maxima]

id like to know to

 

[DarkFireGT]

Well, every car is going to be different. A good tune for an NA motor should be around 13:1. The only way to tell is hook it up to a wideband. They try to hit 13:1 when they give you the tune, but every car will react differently to mods and tunes, so a wideband on the dyno is your best bet to check out the AFR.

 

[AlloyGT]

Wondering if someone with an 05+ GT and a Brenspeed tune can fill me in on what % Lean (or Rich) the tune is running at. I've got a Predator and can adjust how lean (or rich) the car is to run via the fuel table and am wondering what those Brenspeed tunes are running @ w/ the Xcal.

Any info would be appreciated.

Thanks!

I believe that with both the Predator and the XCAL, the Fuel % adjustment which you speak of refers to changing the tune you have loaded on the predator by XX%. Unless you know what you're doing, don't do this, or you may become the proud owner of a Vapor Metallic paperweight.

 

[mongoose101]

Wondering if someone with an 05+ GT and a Brenspeed tune can fill me in on what % Lean (or Rich) the tune is running at. I've got a Predator and can adjust how lean (or rich) the car is to run via the fuel table and am wondering what those Brenspeed tunes are running @ w/ the Xcal.

Any info would be appreciated.

Thanks!

You and a million others. That is why you cannot read the tune. Spend the bucks for your own SCT

 

[anticubicle]

You and a million others. That is why you cannot read the tune. Spend the bucks for your own SCT

It's called helping out. I'm not asking for all the tune parameters. I'm asking how lean the cars with the SCT Brenspeed tunes are running.

I can modify my Predator no problem, hell I have it dyno tuned by DiabloSport themselves. I'm asking for my own reference. I've got my Predator's fuel base set to 3% lean on both RPM ranges at the moment.

Was just curious so no need for rude comment

 

[onebad95]

Actually, that is a good question. I just uploaded my program I got with the tuner and never looked at the %. I will see if I can get that information. It would be nice to see what the results are with all these different guys tuning all our car's. Again, good question anti.

 

[DarkFireGT]

The percentage should be 0, that way you can tweak it up or down 3%. But again, you'd have to run a wideband while dynoing to figure out how much you should change it. You don't want to blindly change it unless you're throwing lean or rich codes.

 

[Hoodlum]

Just got back from a dyno day on saturday and I have a brenspeed 93 tune and a jlt II intake. The richest I hit was 10.0 and I hit a couple of times 10.5 and the tuner said that not even SCT makes their tunes that rich.

Check out video and pictures of the dyno sheets.

http://videos.streetfire.net/uploaded/Hoodlum.htm

 

[StonePony]

Brent has my A/F between 11.5 and 11.8 while running 11 PSI

 

[anticubicle]

I see....I'm currently running my tune @ 4% lean. Going back into DiabloSport soon to get some more Dyno Tuning done. Will letcha guys know what turns up.

 

[kkdoughboy]

Anti, What are you mods that your running it 4p lean?

 

[anticubicle]

Anti, What are you mods that your running it 4p lean?

See my sig.

 

[DarkFireGT]

You really shouldn't be messing with the AFR without seeing your AFR on a dyno with wideband monitoring. 4% is quite a bit of change. If your tune was dead on 13:1, that could put you in dangerous territory, and you could be losing quite a bit of power. You can't blindly change your AFR unless you're getting CEL's indicating it's needed. If you were getting a CEL saying you were running rich, I could see leaning it out until you can get to the dyno, but otherwise there's no reason and you really could be harming your engine.

 

[kkdoughboy]

I agree with darkfire. I wouldnt run at 4 percent lean. Your mods really dont necessitate a lean like that. I'm surprised that your happy with how the cars running. Just my opinion.