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SVT Shelby GT500
best gears for 800hp
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<blockquote data-quote="F8L SN8K" data-source="post: 11058150" data-attributes="member: 50367"><p>Robert thats pretty close to what the math says it should be. The math isn't exact but gets a person in the ballpark fairly close. Calculated out its ~6775. 3 things are going on also that can dirty up the math. </p><p></p><p>1: Is tire growth which is hard to calculate as each tire grows and there is a lot of factors in that so I usually leave them out. But every 1/10 of an inch is ~25rpm </p><p></p><p>2: Trap speed is calculated from the amount of time it takes to break the 2 beams of the last 66ft so the MPH is based on the computer calculations on that. </p><p></p><p>3: Factory Tachometer is usually off by a little bit. Although in the 99-later cars it's much much closer then the older ones. Due to the way they get their signal. My 99 cobra was extremely close although it was hard to break it done to the 25/50 rpm increments as the factory tac is just not that detailed. LOL I had a fox that was off by 50rpm at idle and almost 500rpm at redline! One of my friends had one that was close to 1,000 rpm off. Man has technology brought quality a long way. </p><p></p><p>I hope some of this information helps you guys seeing how we are all here to learn from each others experience.</p></blockquote><p></p>
[QUOTE="F8L SN8K, post: 11058150, member: 50367"] Robert thats pretty close to what the math says it should be. The math isn't exact but gets a person in the ballpark fairly close. Calculated out its ~6775. 3 things are going on also that can dirty up the math. 1: Is tire growth which is hard to calculate as each tire grows and there is a lot of factors in that so I usually leave them out. But every 1/10 of an inch is ~25rpm 2: Trap speed is calculated from the amount of time it takes to break the 2 beams of the last 66ft so the MPH is based on the computer calculations on that. 3: Factory Tachometer is usually off by a little bit. Although in the 99-later cars it's much much closer then the older ones. Due to the way they get their signal. My 99 cobra was extremely close although it was hard to break it done to the 25/50 rpm increments as the factory tac is just not that detailed. LOL I had a fox that was off by 50rpm at idle and almost 500rpm at redline! One of my friends had one that was close to 1,000 rpm off. Man has technology brought quality a long way. I hope some of this information helps you guys seeing how we are all here to learn from each others experience. [/QUOTE]
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best gears for 800hp
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