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SVTPerformance's Chain of Restaurants
The Blower Bistro
Best gears for turbo application?
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<blockquote data-quote="61mmstang94" data-source="post: 8862153" data-attributes="member: 39350"><p>Look at it this way, you know a turbo car likes load and when you increase the load, the better your turbo setup is going to perform. Having slightly longer gears really helps with this, hence why 3.73s will actually hurt the performance compared to a 3.27. If you go with the 3.73s you're going to be shifting too soon and will run out of gear before you get to the end of the quarter most likely.</p><p></p><p>To really figure out exactly what gear you need you'd have to run the car at the track and look at your RPM crossing the line. You want to cross the line at whatever the optimum RPM is and your gearing is what will change that.</p><p></p><p>For example, say you put 3.31s in your car and you are crossing the line at 7500rpm, but it would be more optimal to cross at 7000rpm. You would swap in 3.27s in hopes of getting it down closer to the 7000rpm target so you can go faster. If you were trying to get exact, then that would be the way to do it. But if you go with 3.27s you'll probably be close enough to what you want and from there you could make small changes to get it perfect.</p><p></p><p>Another example would be my own car. I went with 3.31s and a 28" tire...and they work alright. They load the turbo up good, the gears aren't too short, etc., but I would benefit from a set of 3.27s because I'm currently running out of RPM towards the end and it stops pulling before the finish line. So if I went with the 3.27s it would effectively allow my car to be at a little lower RPM and pull all the way through the finish line and my times would be better.</p><p></p><p>Hopefully my jumbled up explanation makes sense.</p></blockquote><p></p>
[QUOTE="61mmstang94, post: 8862153, member: 39350"] Look at it this way, you know a turbo car likes load and when you increase the load, the better your turbo setup is going to perform. Having slightly longer gears really helps with this, hence why 3.73s will actually hurt the performance compared to a 3.27. If you go with the 3.73s you're going to be shifting too soon and will run out of gear before you get to the end of the quarter most likely. To really figure out exactly what gear you need you'd have to run the car at the track and look at your RPM crossing the line. You want to cross the line at whatever the optimum RPM is and your gearing is what will change that. For example, say you put 3.31s in your car and you are crossing the line at 7500rpm, but it would be more optimal to cross at 7000rpm. You would swap in 3.27s in hopes of getting it down closer to the 7000rpm target so you can go faster. If you were trying to get exact, then that would be the way to do it. But if you go with 3.27s you'll probably be close enough to what you want and from there you could make small changes to get it perfect. Another example would be my own car. I went with 3.31s and a 28" tire...and they work alright. They load the turbo up good, the gears aren't too short, etc., but I would benefit from a set of 3.27s because I'm currently running out of RPM towards the end and it stops pulling before the finish line. So if I went with the 3.27s it would effectively allow my car to be at a little lower RPM and pull all the way through the finish line and my times would be better. Hopefully my jumbled up explanation makes sense. [/QUOTE]
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The Blower Bistro
Best gears for turbo application?
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