Roots style supercharger with 4.10 gears

foru2nv4 · 01-28-2009, 07:51 PM

I was wondering if its a good idea and if anyone has experience with 4.10 gears on a supercharger 2003 mustang GT? The supercharger I have is a twin screw type supercharger I went ahead and changed out the exhaust and put a bigger BBK 75mm TB on the supercharger and the supercharger is intercooled. What I want to do is put bigger gears in because the launch sucks on take off from a light until the supercharger kicks in at about 2500 rpms. Very dissappointed with the take off and am wondering if 4.10 gears will fix that and its not an over kill. Would like to be able to shift the car from first to second to third within about 1 second between each gear. So I would like to be in third gear at the top of it within 3 seconds. Would appreciate any opinions but experience would definetly be preferred.

Thank You.

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Bullitt5339 · 01-28-2009, 07:54 PM

I would go with 3.73's instead. With 4.10's and a twin screw, 1st and 2nd gear would be useless.

foru2nv4 · 01-28-2009, 08:05 PM

When you say useless do you mean I couldn't shift fast enough through the gears?

Bullitt5339 · 01-28-2009, 08:09 PM

You may be able to shift through the gears fast enough, but you won't be going anywhere. Twin screws are notorious for making tons of torque down low. You'll be in 1st for like 1/4 second, 2nd for maybe 1/2 a second, but the torque from the twin screw will overwhelm street tires pretty quickly. Also remember, if you go to the track, you'll be limiting yourself with the 4.10 gears. More than likely, you'll hit redline way before the stripe in 4th gear, and you don't want to have to shift into 5th in the 1/4 mile.

foru2nv4 · 01-28-2009, 08:24 PM

Well thanks for your advice I am already reving the engine to 3200 rpms and let the clutch go just to get the take off and the car will slide side to side left and right due to the tires. So my next question is without popping the clutch and reving the engines rpm before take off will 4.10 gears help me in the same way without reving the engine and popping the clutch?

GTmusang01 · 01-28-2009, 08:38 PM

maybe try 3.73s its not as good as 4.10s but when i put the 3.73s in my stang i could feel a significant difference in take off.

Soldier GT · 01-28-2009, 08:44 PM

Quote:

Originally Posted by GTmusang01

maybe try 3.73s its not as good as 4.10s but when i put the 3.73s in my stang i could feel a significant difference in take off.

373's are a very good gear but when I installed the 410's man what a difference. I will aslo be going with a S/C (Procharger) I just hope I don't have any issues with the 410 gearing.

foru2nv4 · 01-28-2009, 08:47 PM

Was that with a supercharger? Just looking at not having to rev the engine up with stock gears and a twin screw SC to pill out to get the SC to kick in at its powercurve. I would like to have gears that will allow me to pill out at the same time I give it gas and release the clutch. I am thinking 4.10 gears with help me achieve that with my 35X275XR18 tires in the rear. After the install of my new gears which I haven't decided yet waitin on all opinions, I might go with 35X305XR18 on the rear to help traction alittle bit more but I don't mine the left to right pill out from a light cuz it shows torque and power. But I will worry about the tires later. I have 18" rims by 10" width so I can run pretty good size tires on the car as long as they don't rub the fender wells. My main concern is what gears to run with a twin screw SC on a 4.6 L mustang 2003? I can make it stick later with diff tires if need be. Thanks for your guys input.

foru2nv4 · 01-28-2009, 09:24 PM

Is that you don't fear the gears no matter what is on the car or engine. I would like to run the 4.10 gears on a twin screw SC with an intercooler and a BBK 75mm TB. 30lbs fuel injectors and a saleen program on the PCM. And the exhaust that has been changed out to SPL I loudmouth exhaust. I am looking at the take off right now. I have to rev. the engine up to 3200 rpms to get it to pill out with 275X35XR18. IF I go with 4.10 gears I am thinking I don't have to rev the engine up and acheive the sam performance as if I had to rev the engine and pop the cluth. I figure if I have 4.10 gears I would be able to release the clutch at the same time I give it gas from a light and achieve the same thing without wearing the clutch out, So in my mind 4.10 gears are the best to go with without bing dissappointed. If I don't like the results since I have 18 inch rims by 10 inch with I can put on 305's or 315's it will get me where I am at right now. but give me a better EST time even if I slide from left to right with bigger tire? I still think I can beat a 6.1 dodge challenger with a hemi with my mustang if I can get it where it needs to be with a 281 block? Help cuz I hat bigger engines with a heavier that thinks they got what it takes to beat a mustang GT that is much lighter no matter what bolt ons are done.

foru2nv4 · 01-28-2009, 09:38 PM

Please there has to be someone out there that is running 4.10 gears on a SC twinscrew Mustang GT. My expectaitions is that its the best gear to run do to the take off of the mustang 4.6L engine, b4 the SC kicks in. I suspect that the 4.10 gears are no different than if I am reving the engine and popping the clutch. I would suspect that it is harder on the clutch with the 3.27 gears than running 4.10 gears. Atleast I wouldn't have to pop the clutch and put strain on it. I could give gas at the same time I release the clutch with 4.10 gears and receie the same results but a better e.t.a. time tham with 3.27 gears. HELP PLEASE HELP ANYONE WITH EXPERIENCE?????!!!!!!