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SVT Shelby GT500
Engine failure questions
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<blockquote data-quote="nxhappy" data-source="post: 14957981" data-attributes="member: 50238"><p>lots and lots of factors. a good tune is needed. aka somebody that knows what the hell they are doing. IATs need to be low. so a dual fan HE, large IC tank, and 170 Tstat are a MUST if you have any aftermarket parts. Also, fuel is a huge issue. If you are in a state where only 91 octane is available, you cannot push the car as "hard" ...aka high boost or advanced timing. Unless of course you have meth or use torco. The higher the octane the better. This is because the motor is less prone to "pre ignition" or "knock". It's really not this simple but the best thing you can do is talk to your tuner. Rule of thumb: pump gas you want to stay 18 pounds or less on the boost. keep the timing conservative. you start going crazy on the timing, you risk the motor. Also target AFR should be 11.0-11.7 . If you are over 12.0 air to fuel ratio your motor is lean (on a boosted motor). also- do NOT rev this motor too high. keep you shifts around 6200 or less. You take it over 6500 you are rolling the dice. bottom line ....listen to your tuner, get someone that works with GT500s, and use high octane if possible.</p></blockquote><p></p>
[QUOTE="nxhappy, post: 14957981, member: 50238"] lots and lots of factors. a good tune is needed. aka somebody that knows what the hell they are doing. IATs need to be low. so a dual fan HE, large IC tank, and 170 Tstat are a MUST if you have any aftermarket parts. Also, fuel is a huge issue. If you are in a state where only 91 octane is available, you cannot push the car as "hard" ...aka high boost or advanced timing. Unless of course you have meth or use torco. The higher the octane the better. This is because the motor is less prone to "pre ignition" or "knock". It's really not this simple but the best thing you can do is talk to your tuner. Rule of thumb: pump gas you want to stay 18 pounds or less on the boost. keep the timing conservative. you start going crazy on the timing, you risk the motor. Also target AFR should be 11.0-11.7 . If you are over 12.0 air to fuel ratio your motor is lean (on a boosted motor). also- do NOT rev this motor too high. keep you shifts around 6200 or less. You take it over 6500 you are rolling the dice. bottom line ....listen to your tuner, get someone that works with GT500s, and use high octane if possible. [/QUOTE]
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