This is topic gears top speed in forum Tech Talk at Northern California Ford Owners  .


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Posted by bobbystang (Member # 2747) on :
 
on my 99 cobra what will be my top speed with a 4:10 gear in it definite answers please? how much will these help me on my car! Much appreciated replies.
 
Posted by cegan (Member # 3185) on :
 
If you are looking for top speed 4:10 is to high, for drag racing yes. 3:73 is a better choice
 
Posted by bobbystang (Member # 2747) on :
 
basically i jsut need to know from someone who knows like they say dont fear the gear, and some people are even telling me go 4:30 and many regret getting 3:73 from waht i hear 4:10 minimum in stangs
 
Posted by Jdub07 (Member # 2728) on :
 
what is your goal? Top speed or track speed? Top speed I'd say 3.73's track speed I would go high as you can!
 
Posted by 91 5.0 (Member # 1527) on :
 
Because the cobra motor redlines so high, you can get away with running lower gears. Go with 4:30's, or if youre going to be blown, 4:10s. [patriot]
 
Posted by bobbystang (Member # 2747) on :
 
Guys all i want to know is my mph speed with a 4:10. stock it is 150 so what would it be now
 
Posted by Primer GR40 (Member # 476) on :
 
quote:
Originally posted by bobbystang:
Guys all i want to know is my mph speed with a 4:10. stock it is 150 so what would it be now
Top speed is limited by the computer, and after that how much power you make. If you had the power, you could do around 220 with 4.10's.
 
Posted by DropTopFox (Member # 1689) on :
 
the top speed is 150 cause it is limited there. That car is capable of way higher then that. get 4:10's your op speed will be the exact same. [patriot]
 
Posted by bobbystang (Member # 2747) on :
 
thanks so ur saying itll be the same speed, than why does everyone say my max speed will be less with gears?????
 
Posted by Red97SVT (Member # 2811) on :
 
I don't think Cobras have a speed limiter except for the 03s. The reason 03s have a limiter is because there is no rear wing to create down force which at >150 is dangerous.

As to which gear will have the highest top speed? I don't think it really matters too much. Mathamtically the lower (numerically) the ratio, the faster you "can" go. The problem is that the faster you go the more power it takes to push through the air. Having a numerically higher ratio allows you to get higher in the rpm range where there is more power, but you have to spin the motor faster to go the same speed. It is a toss up.

To really go faster you need to reduce drag and increase power.
 
Posted by HungryHippo (Member # 537) on :
 
your max possible speed will be less, but you need a lot of power to redline 5th gear. depending on your mods, gears can actually increase your top speed
 




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