4.10 GEARS STUPID???!!!???
6th Gear Member
Joined: Jan 2004
Posts: 10,639
From: IL
RE: 4.10 GEARS STUPID???!!!???
ORIGINAL: Lucy2005
-------5:38 pm---6:26 pm -----7:14 pm-----8:01 pm-----9:15 pm----MARCH 10th (Factory gears, but with supercharger)
60'----2.154------2.010---------1.910--------1.895---------1.886-------1.993
330 --5.887-------5.657---------5.785--------5.616---------5.587-------5.721
1/8---8.943-------8.859---------8.697--------8.664---------8.607--------8.801
MPH--81.57-------81.08---------81.54--------81.53---------81.42--------80.97
1000-11.561------11.496-------11.308-------11.281--------11.224------11.370
1/4---13.741------13.498-------13.488-------13.467--------13.414------13.540
MPH--103.83-----102.45---------103.75------103.44--------103.30------103.30
Last year, before the S/C, before the gears, with a cold air kit, axle backs, and a Diablo tune , my very best time was 14.079 at 99.02 mph, 60' time 2.104
I know it will not run as fast as all the sea level cars, noone does at Bristol. some 3000 feet above sea level, uphill etc. there is a 1/2 second difference at least. I run as well or better than the best COBRAS do here, and we arent far off on HP, though I havent been Dyno'ed (estimate). B ut I dont understand why the gear didnt make a difference. The first 5 columns are with the 4.10 and the last column is without it. I have added an adjustable rear upper control arm, and steeda rear LCA's, along with the gear, but did not have much spin at all. In fact, I spun more without the gear and the suspension upgrade. I hit the rev limiter on the march 10 run, but never touched it on the five runs last night. I have a shift light set at 5900 rpms, and it lit every time, but I never hit the limiter, so i am shifting between 5900 and 6250
-------5:38 pm---6:26 pm -----7:14 pm-----8:01 pm-----9:15 pm----MARCH 10th (Factory gears, but with supercharger)
60'----2.154------2.010---------1.910--------1.895---------1.886-------1.993
330 --5.887-------5.657---------5.785--------5.616---------5.587-------5.721
1/8---8.943-------8.859---------8.697--------8.664---------8.607--------8.801
MPH--81.57-------81.08---------81.54--------81.53---------81.42--------80.97
1000-11.561------11.496-------11.308-------11.281--------11.224------11.370
1/4---13.741------13.498-------13.488-------13.467--------13.414------13.540
MPH--103.83-----102.45---------103.75------103.44--------103.30------103.30
Last year, before the S/C, before the gears, with a cold air kit, axle backs, and a Diablo tune , my very best time was 14.079 at 99.02 mph, 60' time 2.104
I know it will not run as fast as all the sea level cars, noone does at Bristol. some 3000 feet above sea level, uphill etc. there is a 1/2 second difference at least. I run as well or better than the best COBRAS do here, and we arent far off on HP, though I havent been Dyno'ed (estimate). B ut I dont understand why the gear didnt make a difference. The first 5 columns are with the 4.10 and the last column is without it. I have added an adjustable rear upper control arm, and steeda rear LCA's, along with the gear, but did not have much spin at all. In fact, I spun more without the gear and the suspension upgrade. I hit the rev limiter on the march 10 run, but never touched it on the five runs last night. I have a shift light set at 5900 rpms, and it lit every time, but I never hit the limiter, so i am shifting between 5900 and 6250
Either you need a lot of practice driving, (Which it doesn't really sound like you do, and I say that because your times are fairly consistant) or you need to find a tuner with a dyno, and bring him your slips. The 60 ft's are terrible with drag radials, and 4.10's. The MPH tells me that the car just isn't making anywhere near the power it should be. So somethings up. And to be honest, I wouldn't be running a blower car without a tune in it anyway.
Edit: The other thing I would suggest, since you're having trouble getting the car out of the hole is to run it up to around 4000 rpms at the light, and try slipping the clutch when you're leaving. Maybe you're just not in the power at 3K.
2nd Gear Member
Joined: Feb 2006
Posts: 227
From:
RE: 4.10 GEARS STUPID???!!!???
Other 05-06 GT mustangs, Stock, at Bristol, run mid to high 14's, even low 15's. These (13.4) are reasonably good times for this track. The Roush Supercharger setup includes sending the computer to roush for a reflash and installation of proprietary roush software. It is retuned by roush, and cannot be retuned without going through roush and voiding the warranty. It isnt the car. Must be the track. Frankly, I never beleived the times I have seen on here from stock, or basically stock, cars, until I realized that new GT;s run times consistent with what I ran at Bristol.
That really isnt the issue. I dont see why the times didnt CHANGE when the 4.10's went in. It doesnt matter if I was running 3/8s of a mile at 16 sec, if I still ran 3/8s mile at 16 sec with the gears and without the gears. What I cant fathom is how the time did not CHANGE when the gears were added.
That really isnt the issue. I dont see why the times didnt CHANGE when the 4.10's went in. It doesnt matter if I was running 3/8s of a mile at 16 sec, if I still ran 3/8s mile at 16 sec with the gears and without the gears. What I cant fathom is how the time did not CHANGE when the gears were added.
I ♥ Acer
Joined: Jan 2006
Posts: 619
From:
RE: 4.10 GEARS STUPID???!!!???
ORIGINAL: praztek
Those that have 4.10's, any issues with the oem driveshaft vibrating? Since its rotating at a higher revolution, was just curios?
Thanks
Those that have 4.10's, any issues with the oem driveshaft vibrating? Since its rotating at a higher revolution, was just curios?
Thanks
There's something screwy about these driveshafts, they are two piece I was told and you have to line them up?? I know you have to align splines and all, but I wonder do they have to be in certain positions when you mate them?
BTW IMHO, 3.73's are plenty of gear for those with automatics. You are technically geared lower with a 3.73 in an automatic than you are with 4.10s in a manual. I'm taching about 2700 rpm @ 80mph in mine; any more and why have an OD transmission?
Thx,
Mike
3rd Gear Member
Joined: Dec 2005
Posts: 601
From: Long Island, New York
RE: 4.10 GEARS STUPID???!!!???
Lucy, you might just have to get your car dynoed, like Sidewayz said, so you know where the power is, not sure if you've gotten it dynoed tuned yet. Your problem might be the shifting too. Comparing your times to mine (from two weeks ago with the stock gears) you got me beat by .2 seconds when you reach the 60', then your times start going down from there. When you get to the 1/8, I have already caught up to you (my best 1/8 was 8.642), then by the end of the 1/4 mile I have already passed you, my best time was 13.34 at 103.7. Even if you didn't chance anything on the launch and just perfected your shift points, your times might even get you into the 12s, like I said you're already launching .2 seconds faster than me and I got a 13.34.
2nd Gear Member
Joined: Feb 2006
Posts: 227
From:
RE: 4.10 GEARS STUPID???!!!???
Im going to try and set up an appointment on my next day off. Might be a couple weeks. I do need a thorough dyno. I guess I could shift harder, and I have a steeda short throw adapter I never installed, that might help speed up my shifting a touch.
2nd Gear Member
Joined: Feb 2006
Posts: 227
From:
RE: 4.10 GEARS STUPID???!!!???
Also, my overall rear wheel circumfrence is quite a bit less with the drag radials. There were only 2 choices to fit a 17 inch rim when I bought them. Could this have much of an effect on my time and speed? I mean, the overall size of the tire and wheel is noticeably smaller than the factory wheel and tire. And Im not referring to the speedometer reading, Im talking about the actual recorded time and speed at the track.???
3rd Gear Member
Joined: Nov 2005
Posts: 794
From:
RE: 4.10 GEARS STUPID???!!!???
Had the frrp 4.10 installed for about 4 weeks now. Noticing a whine while backing up or pulling into a parking space. The wheels are turned pretty tight, this is the only time I hear it. Another member on the forum states it’s the rear clutch pack. The shop says the only time this would cause the noise would be due to a insufficient amount of fluid. He's suggesting bringing in another bottle of friction modifier and this should fix it. Also read that the rear clutch packs have been already replaced by some members due to defects.
2nd Gear Member
Joined: May 2006
Posts: 169
From:
RE: 4.10 GEARS STUPID???!!!???
In the newer model mustangs you are using a transmission with an overdrive , 4.10 rear gear in not a stretch with that , in the older cars trans output final was 1:1 making a 4.10 gear a bit low for street use.
1st Gear Member
Joined: Apr 2006
Posts: 65
From:
RE: 4.10 GEARS STUPID???!!!???
So I have read this entire thread and everyone has their good/bad regarding the gears. Assuming that your only replacing the clutch, etc.... It's a good excuse as most put, to buy something a little stronger, assuming you got some extra $.
My point is, does the 4.10 gears make your car faster, in all aspects? ie: 60ft, 1/8th, 1/4mile, total trap speed, 1/4 speed, etc, etc.
You are "wrapping" out each gear a lot quicker and making extra shifts perhaps when one (Stang) could still be "wrapping" out beside you with 3.55 gears and still pulling 2nd or 3rd, then you are making some time up with the 3.55, unless that driver can shift like a "maniac", which most do not practice enough to make this happen. I guess I just want to know if it's quicker than the next , stock....
Point is if your lowering the gears, you "wrap" out each gear faster and if you can "SHIFT" well, then you will not outrun the next guy??? [X(]
All assuming the variables are rear end gear change only, utlizing the same setup per Mustang GT. DO YOU GO FASTER? [:-]
Just Brainstorming.. Thanks!
RED[:@]
My point is, does the 4.10 gears make your car faster, in all aspects? ie: 60ft, 1/8th, 1/4mile, total trap speed, 1/4 speed, etc, etc.
You are "wrapping" out each gear a lot quicker and making extra shifts perhaps when one (Stang) could still be "wrapping" out beside you with 3.55 gears and still pulling 2nd or 3rd, then you are making some time up with the 3.55, unless that driver can shift like a "maniac", which most do not practice enough to make this happen. I guess I just want to know if it's quicker than the next , stock....
Point is if your lowering the gears, you "wrap" out each gear faster and if you can "SHIFT" well, then you will not outrun the next guy??? [X(]
All assuming the variables are rear end gear change only, utlizing the same setup per Mustang GT. DO YOU GO FASTER? [:-]
Just Brainstorming.. Thanks!
RED[:@]