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2011-2014 Mustangs
VMP Performance
VMP 75mm or 79mm pulley numbers?
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<blockquote data-quote="mackdog2008" data-source="post: 15064272" data-attributes="member: 152681"><p>It was at 15° timing when I ran 91</p><p></p><p>My E85 is running 22° timing.</p><p></p><p>My 91 dyno was a different dyno than my E85 dyno, so that may explain the nearly 100 hp increase.</p><p></p><p>Even if both are reading high, say 30 hp that's still 600 on 91 and 700 on E85 </p><p></p><p>I went to the track the other day but I am out of gear probably 1 to 200 feet from the finish line (maybe more), according to an online calculator, with 3.31 gears, 4th gear ratio at 1.32 and my tires being 295 35 18 (26.1" tall) 4th gear runs out at 126 miles per hour at 7,100 rpms, I am getting to 7k and holding because I really don't have a lot of time to shift into 5th, at that speed distance goes by fast.</p><p></p><p>I am looking at a set of 305 45 18 like these </p><p></p><p><a href="http://m.summitracing.com/parts/mtt-3580" target="_blank">http://m.summitracing.com/parts/mtt-3580</a></p><p></p><p>I would be out of 4th gear at 139 miles per hour, so this is next on my mod list, a set of these tires and an extra set of 18" wheel's.</p><p></p><p>I don't take it wrong don't worry but I don't see a dyno reading way off, even if you took off 50 hp from my E85 dyno that's 678 rwhp but I am betting it's not off that much at all.</p><p></p><p>Soon I will have my tires and get back to the track for some better times.</p></blockquote><p></p>
[QUOTE="mackdog2008, post: 15064272, member: 152681"] It was at 15° timing when I ran 91 My E85 is running 22° timing. My 91 dyno was a different dyno than my E85 dyno, so that may explain the nearly 100 hp increase. Even if both are reading high, say 30 hp that's still 600 on 91 and 700 on E85 I went to the track the other day but I am out of gear probably 1 to 200 feet from the finish line (maybe more), according to an online calculator, with 3.31 gears, 4th gear ratio at 1.32 and my tires being 295 35 18 (26.1" tall) 4th gear runs out at 126 miles per hour at 7,100 rpms, I am getting to 7k and holding because I really don't have a lot of time to shift into 5th, at that speed distance goes by fast. I am looking at a set of 305 45 18 like these [url]http://m.summitracing.com/parts/mtt-3580[/url] I would be out of 4th gear at 139 miles per hour, so this is next on my mod list, a set of these tires and an extra set of 18" wheel's. I don't take it wrong don't worry but I don't see a dyno reading way off, even if you took off 50 hp from my E85 dyno that's 678 rwhp but I am betting it's not off that much at all. Soon I will have my tires and get back to the track for some better times. [/QUOTE]
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VMP Performance
VMP 75mm or 79mm pulley numbers?
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