Wow Tom,,,can't believe how fat the afr is from the factory,,,great work!
Bet the owner is a happy camper!
Jimbo
__________________ sig by GR8 White
'03 EB/mod blue VE interior, LME-LS3 Stroker, AFR 225's and a nasty cam from Pete at V-MAX, 3" custom Powerstick exhaust and lots of attitude! Any questions? Z06 Fest member III, IV, V, VI, VII, and Winterfests 1&2. new times coming soon!
Dumb rookie non gearhead question: What does it mean to have a "fat afr"? Is that like an ugly fat girlfriend?
I already have the Corsa exhaust and the Killer Bee on my 07 Z, but no tune.
What does the "tune" do or what do you do to "tune" it? If I move towards a "thin afr", whatever that means, what additional reliability issues or longevity issues are inherent in such a move? Will it shorten engine life or am I already on my way with a heavy right foot? Please start slow and take small steps with the explanation. I'm ready to make room for a little more information.
Is this the Jim Hall emailTune? What and how does it do what it does?
The terms most often used in relation to Air-Fuel Ratio (AFR) are Fat and Lean. Fat simply means that there is more fuel in the mixture, lean means there is less fuel in the mixture. Putting more fuel in the mixture robs the car of some performance but also protects the engine from "burning up" components. Leaning out the AFR will help you gain performance, but there is a fine line between lean and too lean. FRC Tom is extremely knowledgable in what works for these engines and what does not.
A Tune is the tweaking of various computer characteristics in the engine computer system. Specialized software is required to modify the parameters in the engine control system. FRC Tom uses a package called HP Tuners to perform the tuning of the engine control system.
A tune like what is shown above is not a mail in tune, but rather a Dyno and road test tune of the car live and in person at a perfomrance shop. Depending on what modifications you have made to the engine of your car a mail order may or may not work. A mail order tune works best when a specific set of known mods have been added to a car. Generally speaking, however, it is always better to take your car to a reputable shop and have a known tuner put your car on the road and on the dyno to perform the tuning of the engine.
Tuned properly, you should suffer no longevity issues or engines problems, this only happens when tuners get too aggressive with their modifications to the engine control system.
If you have a stock 07 and the killer Bee intake, send a PM to FRC Tom, he may be able to provide a mail order tune for those mods that will allow you to get the most out of what you have.
FRC Tom is one of the best, I trust him implicitly, he has tuned my car several times.
The terms most often used in relation to Air-Fuel Ratio (AFR) are Fat and Lean. Fat simply means that there is more fuel in the mixture, lean means there is less fuel in the mixture. Putting more fuel in the mixture robs the car of some performance but also protects the engine from "burning up" components. Leaning out the AFR will help you gain performance, but there is a fine line between lean and too lean. FRC Tom is extremely knowledgable in what works for these engines and what does not.
A Tune is the tweaking of various computer characteristics in the engine computer system. Specialized software is required to modify the parameters in the engine control system. FRC Tom uses a package called HP Tuners to perform the tuning of the engine control system.
A tune like what is shown above is not a mail in tune, but rather a Dyno and road test tune of the car live and in person at a perfomrance shop. Depending on what modifications you have made to the engine of your car a mail order may or may not work. A mail order tune works best when a specific set of known mods have been added to a car. Generally speaking, however, it is always better to take your car to a reputable shop and have a known tuner put your car on the road and on the dyno to perform the tuning of the engine.
Tuned properly, you should suffer no longevity issues or engines problems, this only happens when tuners get too aggressive with their modifications to the engine control system.
If you have a stock 07 and the killer Bee intake, send a PM to FRC Tom, he may be able to provide a mail order tune for those mods that will allow you to get the most out of what you have.
FRC Tom is one of the best, I trust him implicitly, he has tuned my car several times.
Mark
Thank you Professor. I understand that at a very basic level, but I have to start somewhere. It's like beer, neither to much nor not enough, is ideal. Your time and information are very much appreciated.
Location: Yuma, Az. ?????? Z06 Fest IV, V, VII and Winterfest 1 & 2
Posts: 2,975
Re: 2008 Killer Bee with tune.
The stock number seems low to me as compared to what I have seen with the 06 and 07 Z's. Did GM change something in 08 (besides running rich)? Less aggressive with the stock tune?
As usual, great work Tom.
__________________
Sig by GR8 White (modified by Speedratchet) 2004 MS/BLK
NCM#31853 Still retired out in the middle of nowhere.
Tom...how many 08 Z06's have you tuned? Just wondering because the stock rwhp and tq seem awfully low. My 06 without a tune pulled 448 rwhp and 439 tq. The majority of 06's I've seen on the dyno have pulled 445-455 stock. If the 08's are in the 426 range stock, something seems amiss....
Tom...how many 08 Z06's have you tuned? Just wondering because the stock rwhp and tq seem awfully low. My 06 without a tune pulled 448 rwhp and 439 tq. The majority of 06's I've seen on the dyno have pulled 445-455 stock. If the 08's are in the 426 range stock, something seems amiss....
I think they're overly-fat from the factory, Mike. I believe they'll all end up approx the same after tuning (me hopes!)
I've yet to baseline dyno the '08. My '06Z did 439/417 stock.
Nice job Tom!
__________________
George B.
* '08 JSB Z06 11.4 @ 126 on EMTs, 481/454 SAE #s--some bolt-ons...
* '90 ZR-1 SGC built 368ci 'Factory Black Motor' (11.0 @ 130.2 & 11.2 @ 132.4) w/ the 368 (421ci Stroker coming!)--sprayed 120 shot.. 448 RWHP on motor, 560+ RWHP on the spray (SAE #'s)
Tom...how many 08 Z06's have you tuned? Just wondering because the stock rwhp and tq seem awfully low. My 06 without a tune pulled 448 rwhp and 439 tq. The majority of 06's I've seen on the dyno have pulled 445-455 stock. If the 08's are in the 426 range stock, something seems amiss....
I have only done 2 08s Mike and both dynoed low.
I believe I have another one later this week.
All the 06s i have done were in the 440-450 range stock.
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Re: 2008 Killer Bee with tune.
sig by GR8 White
Any questions? 
Z06 Fest member III, IV, V, VI, VII, and Winterfests 1&2. new times coming soon! 
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