3.27 - 4.10 Gearing ???

blue00gt · 03-19-2004, 08:53 PM

Explicitone,
I'm not sure how much of that was directed at me, but I never said that 4.10s don't help you down low - that was the whole point of my statement about them getting you into the powerband quicker. I don't know if you've ever raced a car with almost identical power but stock gears. From a roll the faster you are going the less the 4.10s seem to help. Off the line is where you gain the most ground.
I have the JBAs because my longtubes were bottoming out all the time on the roads here. I am well aware of the lack of a decent gain with shorties on mod motors - that's why I bought the longtubes to begin with. I didn't have the heart to put the nasty looking stock manifolds back on when I pulled the longtubes. To tell you the truth I didn't really notice losing any hp when I swapped from BBK lontubes and short H-pipe to the JBA headers and Magnaflow X-pipe, but I need to get back to the track to see what's really up. As for the 70mm TB I just have it because I got it for next to nothing and am installing an upper plenum pretty quick here (based on the results people are posting for the plenums, it looks like the 70mm gives more gain with a lot of them than the 75mm).
One thing I will say is that the Spec aluminum flywheel and Spec Stage 2 clutch with lightened pressure plate gave more SOTP gain than the longtubes and short H-pipe and cost a lot less (I have to run cats).
For what little I have my car runs surprisingly well - I run even with my friend's new 5-speed Mach 1.

03-19-2004, 08:53 PM	#11
blue00gt Mustang Addict Join Date: Jan 2001 Location: McKinney, TX Posts: 1,294	Explicitone, I'm not sure how much of that was directed at me, but I never said that 4.10s don't help you down low - that was the whole point of my statement about them getting you into the powerband quicker. I don't know if you've ever raced a car with almost identical power but stock gears. From a roll the faster you are going the less the 4.10s seem to help. Off the line is where you gain the most ground. I have the JBAs because my longtubes were bottoming out all the time on the roads here. I am well aware of the lack of a decent gain with shorties on mod motors - that's why I bought the longtubes to begin with. I didn't have the heart to put the nasty looking stock manifolds back on when I pulled the longtubes. To tell you the truth I didn't really notice losing any hp when I swapped from BBK lontubes and short H-pipe to the JBA headers and Magnaflow X-pipe, but I need to get back to the track to see what's really up. As for the 70mm TB I just have it because I got it for next to nothing and am installing an upper plenum pretty quick here (based on the results people are posting for the plenums, it looks like the 70mm gives more gain with a lot of them than the 75mm). One thing I will say is that the Spec aluminum flywheel and Spec Stage 2 clutch with lightened pressure plate gave more SOTP gain than the longtubes and short H-pipe and cost a lot less (I have to run cats). For what little I have my car runs surprisingly well - I run even with my friend's new 5-speed Mach 1. __________________ Strike down the unroadworthy! 2000 GT Atl. Blue: '03 Cobra motor - 465rwhp/473rwtq, T-56 6-speed, full MM TA/PH & tubular K-member suspension, Saleen body, 17" Torq-Thrust II's, M/T ET Street radials, and lots more '94 Rio Red Cobra: All the bolt-ons, 3.73s

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