top speed with 3.73?
12-20-2004, 04:32 PM
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top speed with 3.73? My buddy claims that his 3.73s I put in are killin his top speed, says he went 120 at 5,000 !? wtf, claims car will only go 140, shouldnt it go about 168 at 6500?
12-20-2004, 05:15 PM
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The last high speed run I had, we figured it up and I was doin' about 145-150 at almost 5.5k.(i think) My speedo only says 110, so we had to figure it up on a speed calc.
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12-21-2004, 01:04 AM
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hmm I was doing 146mph with my car the one night after I got bored. I forget what rpms it was at, but it was still pulling with 3.73s outback with some 255/50/17s 
Matt
Matt
12-23-2004, 09:57 PM
#12
There is a spreedsheet someone made for our cars that allowed you to enter your car, tire size and gear ratio. Anyone have that? That would answer this question with 100% accurate math.
12-24-2004, 06:57 AM
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oh I already figured it out with a calculator, 168 at 6,400 RPMs, OD with 7% converter slip......he dont beleive me though says he was goin 120 at 5000 that cant be right, especially with stock converter, oh, and his tires are low profile, only 24" tall
12-24-2004, 03:59 PM
#14
I've used this calculator before: http://www.juric.org/mopar/tools/topspeed.php
I've had my car up to 5900rpm (Autometer tach read off the MSD) in 5th gear (.74 ratio) and with the 315/35/17's I had on it, it calcs out to be 178mph and it was still pulling slowly in 5th gear. I ran out of freeway though and I was getting a bit leary winding out the stock shortblock for that amount of time. Car was dead solid at speed though, I was impressed with the stability. I've gone 150 in my friends C4 and it felt really 'floaty' and made me nervous.
Mike
I've had my car up to 5900rpm (Autometer tach read off the MSD) in 5th gear (.74 ratio) and with the 315/35/17's I had on it, it calcs out to be 178mph and it was still pulling slowly in 5th gear. I ran out of freeway though and I was getting a bit leary winding out the stock shortblock for that amount of time. Car was dead solid at speed though, I was impressed with the stability. I've gone 150 in my friends C4 and it felt really 'floaty' and made me nervous.
Mike
