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2015+ S550 Mustangs
5.0L Coyote V8 Engine Modification/Discussion
Bullitt gear swap 4.09 or 4.56
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<blockquote data-quote="HI RPM" data-source="post: 16388436" data-attributes="member: 193343"><p>Have any Bullitt owners swapped out their gears?</p><p></p><p>I am a current 2013 Boss owner. The new Bullitt and PP2 cars have caught my attention.</p><p>As I read thru the specs I see the updated 2018+ mt82 D4 ratios are quite different than mine.</p><p>I realize the new engines have more torque, (420 vs 380) but they still seem to be geared to high.</p><p></p><p>The tight gearing in the Boss is what makes it fun on the street and backroads where I spend my time driving. I don't take it to the track. </p><p> The 2018+ cars (according to a speed/ratio calculator) would need a 4.30 gear set to be comparable. The 4.09/4.10 set is still not quite enough (but a big step in the right direction) and the 4.56 set makes 1st gear almost to steep. Sadly I don't see a 4.30 gear set available.</p><p></p><p>Any info or insight about the required tuning and drivability would be appreciated.</p><p></p><p> The ideal situation would be to purchase a new Bullitt or PP2 car, have the dealer swap the gears with FPP's before delivery and leave there with the factory new car warranty intact. Thanks.</p></blockquote><p></p>
[QUOTE="HI RPM, post: 16388436, member: 193343"] Have any Bullitt owners swapped out their gears? I am a current 2013 Boss owner. The new Bullitt and PP2 cars have caught my attention. As I read thru the specs I see the updated 2018+ mt82 D4 ratios are quite different than mine. I realize the new engines have more torque, (420 vs 380) but they still seem to be geared to high. The tight gearing in the Boss is what makes it fun on the street and backroads where I spend my time driving. I don't take it to the track. The 2018+ cars (according to a speed/ratio calculator) would need a 4.30 gear set to be comparable. The 4.09/4.10 set is still not quite enough (but a big step in the right direction) and the 4.56 set makes 1st gear almost to steep. Sadly I don't see a 4.30 gear set available. Any info or insight about the required tuning and drivability would be appreciated. The ideal situation would be to purchase a new Bullitt or PP2 car, have the dealer swap the gears with FPP's before delivery and leave there with the factory new car warranty intact. Thanks. [/QUOTE]
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5.0L Coyote V8 Engine Modification/Discussion
Bullitt gear swap 4.09 or 4.56
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