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Discussion Starter · #1 ·
Looking to add shorty headers, 3.73 gears, 1 piece driveshaft and a set of lower control arms during the Winter months. I also have new wheels and tires which may hurt more than help since I'm going from 17" 215's to 20" 255 & 295 in the back. Right now I have a JLT CAI, 73mm throttle body and MPT tune. Is it reasonable to anticipate picking up .8-1.0 in the quarter mile? That's what I'm reading for similar mods. It's an automatic 2013. ImageUploadedByMustang Evolution1481166772.758478.jpg


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It'd be at the top end of what's possible, but i dont think its totally outrageous. The stock auto shifts SOOOOOO lazy ... hell, even with a tune the stock torque converter is so soft it's not hard to outshift it in a manual. The gears and tune on the auto are pretty big gains. Do some before and after testing and keep us posted.
 

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Compared from 100% factory stock, I think you could hope for .8-1.0 off your 1/4 mile times with the mods you are doing. In my opinion adding the shorty headers, gears and tires you might take .4-.6 tenths off of your current 1/4 mile times. I know 1 tenth doesn't sound like much but I read somewhere that at around 100 mph I tenth of a second is 15 feet. :)
 

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The shorty headers will provide very little gain and the gears may end up being detrimental to you. Everyone thinks gears equal instant gains at the track and that's just not true.
 

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The shorty headers will provide very little gain and the gears may end up being detrimental to you. Everyone thinks gears equal instant gains at the track and that's just not true.
There is a big difference between the 5.0 and 3.7. My wife's old auto 3.7 the 3.73s alone were worth over half a second, the tune was another .2.

The 5.0s dont benefit from a gear change on the stock converter, but they also have a much better final drive stock. The 3.7 needs a gear change to do anything.
 

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Because the 3.7's lack torque unlike the 5.0's , a gear swap is a must. 3:73's are amazing for our 3.7's. Go with long tube headers. More power mid to high range and more overall power than shorties

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There is a big difference between the 5.0 and 3.7. My wife's old auto 3.7 the 3.73s alone were worth over half a second, the tune was another .2.

The 5.0s dont benefit from a gear change on the stock converter, but they also have a much better final drive stock. The 3.7 needs a gear change to do anything.
Agreed.

3.15s in a V8 are much more capable than 2.73s in a V6.
 

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Because the 3.7's lack torque unlike the 5.0's , a gear swap is a must. 3:73's are amazing for our 3.7's. Go with long tube headers. More power mid to high range and more overall power than shorties

Sent from a non car enthusiast V6 mustang owner's cell phone.
The 5.0's lack torque as well.
 

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Because the 3.7's lack torque unlike the 5.0's , a gear swap is a must. 3:73's are amazing for our 3.7's. Go with long tube headers. More power mid to high range and more overall power than shorties

Sent from a non car enthusiast V6 mustang owner's cell phone.
Go with the Shorties, when the BBK's first came out someone on another site went from the Long Tubes to the Shorties and picked up a tenth in the 1/4.
That and they are actually street legal if you do not touch your cats :whistling:
 

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Go with the Shorties, when the BBK's first came out someone on another site went from the Long Tubes to the Shorties and picked up a tenth in the 1/4.
That and they are actually street legal if you do not touch your cats :whistling:
Valid and good point about the street legal. I'll check on that 1/4 mile being faster with shorties than long tubes with same exact mods and same transmission

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Go with the Shorties, when the BBK's first came out someone on another site went from the Long Tubes to the Shorties and picked up a tenth in the 1/4.
That and they are actually street legal if you do not touch your cats :whistling:
The fastest N/A 3.7's in the country are running Lt's

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I would argue that the shorties will make a big (relative) difference because they will help you get out of the hole. little gains in the first half lead to big gains in the back half, so it's almost a wash... if a shorty helps you get going faster, vs a long tube pulling you through on the back half... IDK, i dont care enough one way or the other, these are just my thoughts on the matter.
 

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But the biggest difference between the two is the shorties are still in the rpm range of a street car.

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Discussion Starter · #16 ·
Thanks for all the replies everybody. Apparently my notifications aren't working for the app. I know that overall the longtubes generally see more gains, but my car is really lacking out of the hole. On just about any car I've gone up against so far, they are beating me off the line by a lot and I'm running them back down in the top end. I'm hoping to have everything bought this winter and installed by Spring. My best time in the 1/4 was a slow 14.1, so I should blow that out of the water. And anything under 14 requires a helmet. Better pick up one of those!


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Thanks for all the replies everybody. Apparently my notifications aren't working for the app. I know that overall the longtubes generally see more gains, but my car is really lacking out of the hole. On just about any car I've gone up against so far, they are beating me off the line by a lot and I'm running them back down in the top end. I'm hoping to have everything bought this winter and installed by Spring. My best time in the 1/4 was a slow 14.1, so I should blow that out of the water. And anything under 14 requires a helmet. Better pick up one of those!


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What gears are you running? I'm guessing 2:73 gears? If so or even 3:31 gears, that's a good part of your getting out of the hole issue

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Discussion Starter · #18 ·
What gears are you running? I'm guessing 2:73 gears? If so or even 3:31 gears, that's a good part of your getting out of the hole issue

Sent from a non car enthusiast V6 mustang owner's cell phone.

Yeah, 2.73 to 3.73 will be a dramatic improvement.


Grabber Blue 2013 V6 3.7L
 

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Discussion Starter · #20 ·
Right there is one of your problems. A big problem and lack getting out as you speak

Sent from a non car enthusiast V6 mustang owner's cell phone.

The fact that someone mentioned they gained half a second with the gears alone makes me optimistic.


Grabber Blue 2013 V6 3.7L
 
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