I'm currently running 3.55's, will be using brand new M/T slicks 26 x8 ( I can't recall diameter) for drag racing. Will 4.10's work with these tires? Are they too short? Meaning what would my trap speed be etc. Since they are new .....I'm not going to buy a taller tire..can I get away with 4.10's or are 3.73's more suitable for optimum e.t.
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89 ' LX 5.0L coupe ex-crash victim.5 sp., 100% stock except for Dynomax Super Turbo mufflers. 2-1/2" tailpipes, airbag in right rear, K&N filter, 4.10's,subframe conn. A plain LX . 14.06 in the quarter .@95.75 mph / 1.79 60' No front sway bar. M/T slicks 3500 rpm launch, 11 psi on 89 octane, timing in the 14-16 degree range Done on a 70 degree day. Best 60' to date 1.77, best e.t. to date 14.01 by my brother.
They will work. Your MPH may be the same if not higher. But why worry about MPH. LOWER et's is where it is at.
If i run a 13.0 @ 103 mph and you run a 13.2@ 108 mph who wins?
See what I am saying.
I ran a 26 x 10.5x 15 on 3.55's I got lower ets but trap speed was down. I am sure with 4.10's it will be a little higher mph and should be lower ets as well.
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'89 LX 5.0 Hatchback
For accuracy on your track times. GO TO THE TRACK!
8.1 with 5spd et streets
AOD all motor 8.8@78 mph street tires
125 shot nitous 7.51@91 mph street tires
I'm currently running 3.55's, will be using brand new M/T slicks 26 x8 ( I can't recall diameter) for drag racing. Will 4.10's work with these tires? Are they too short? Meaning what would my trap speed be etc. Since they are new .....I'm not going to buy a taller tire..can I get away with 4.10's or are 3.73's more suitable for optimum e.t.
There are so many variables. Where does you motor make power? 5K, 6k, 7K rpm? You have a 5 speed, I am assuming 4th is 1:1? Plan on putting any power adders / N20 in the future? Daily driver? Race car? Freeway driving? Etc.
With the limited info you gave, I am in agreement with 1stPny because to spend $500 to go from 3.55's to 3.73's seems pretty silly. I would go with the 4.10's. If you are NA, and you make power above 6000 rpm, with a 5 speed I would even consider 4.30's---unless you do alot of freeway driving everyday. Once again, so many variables.
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Paul
Daily driven 2005 GT AUTO - Whipple @ 16psi - 577 rwhp 519 rwtq
Best 1/8th mile: 6.740 @ 101.56 mph with a 1.431 60' time
Best 1/4 mile: 10.672 @ 128.42 mph with a 1.480 60' time Special thanks to:
ST Motorsports, San Bernardino CA - built engine and tune
Larry's Transmission, Corona CA - built 5R55S
M&H - 325/45/17 racemaster drag radials
GI Joe - 8 rib pulley kit
Thump_rrr - billet tensioner
Its a completely stock motor. It's a 5 speed with the Borg Warner upgrade( warranty way back when) This is the 3.35 first gear transmission. I'm not planning on any power adders , nitrous, etc. I plan on retaining the stock driveline. I do plan on concentrating on getting the car to hook up better ,(adj struts , air bag in the back suspension) weight reduction, and some better brakes, and freeing up the exhaust (possibly)
The car is driven very sparingly in the summer sunny days, just around town. Its a sunny day driver. Lucky if it's driven umm 2000 miles a year.
Its a 100% street car. No freeway driving. I want to get the car to get the lowest e.t .possible in stock form.
So I do not want to buy new tires. I want to use the ones I have but select the right gear
I'm not concerned about gas mileage but MIGHT be concerned with shifting all the time.
I have heard that 4.10's on a stock motor are not recommended ,. I'm not sure why? I know there will be more frequent shifting. Is it really that bad? I know the 4.10 will offer a hell of a launch and faster acceleration, than the 3.55's. Are they that much more better (4.10's vs. 3.73) for my application?
The 4.30's do sound appealing as well .
As long as they will work with my tires and engine/driveline.
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89 ' LX 5.0L coupe ex-crash victim.5 sp., 100% stock except for Dynomax Super Turbo mufflers. 2-1/2" tailpipes, airbag in right rear, K&N filter, 4.10's,subframe conn. A plain LX . 14.06 in the quarter .@95.75 mph / 1.79 60' No front sway bar. M/T slicks 3500 rpm launch, 11 psi on 89 octane, timing in the 14-16 degree range Done on a 70 degree day. Best 60' to date 1.77, best e.t. to date 14.01 by my brother.
Seeing how your car sees limited drive time and pretty much no freeway time, and you want to make it as fast as possible stock, AND you have slicks.....you gotta go with 4.30's!! Plus, that would be fun as hell to drive on the street. Especially with that 3.35 first gear....whooh look out!
When you are NA, don't fear the gear! And as far as people not "recomending" 4.10's, I am sure they wouldn't "recomend" you go drag racing either.
Here is a link to help you determine what rpms you will be looking at: http://www.corral.net/tech/gearcalc.html I figure with the 26 tall tire you are looking at 5850 rpm at 104mph in 4TH, and a measely 3900 rpm in 5th at 104mph. That means even with the 4.30's you could easliy get away with freeway driving in the 70mph range.
I have a friend with a Mach 1 that has done what you are thinking about, and he runs 12.40's at 104 mph with 1.6X 60' times, with a stock motor, weight reduction, suspension, gear, m/t et streets.
And don't forget, since you will be running slicks, even though your stock, most tracks will make you have a driveshaft loop.
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Paul
Daily driven 2005 GT AUTO - Whipple @ 16psi - 577 rwhp 519 rwtq
Best 1/8th mile: 6.740 @ 101.56 mph with a 1.431 60' time
Best 1/4 mile: 10.672 @ 128.42 mph with a 1.480 60' time Special thanks to:
ST Motorsports, San Bernardino CA - built engine and tune
Larry's Transmission, Corona CA - built 5R55S
M&H - 325/45/17 racemaster drag radials
GI Joe - 8 rib pulley kit
Thump_rrr - billet tensioner
Sorry I been away from the site a while. Has anbody tried the 4.10 gears on the 5.0 motor( as you know pushrod- which is quite different from the modular)
on a relatively stock or stock car?
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89 ' LX 5.0L coupe ex-crash victim.5 sp., 100% stock except for Dynomax Super Turbo mufflers. 2-1/2" tailpipes, airbag in right rear, K&N filter, 4.10's,subframe conn. A plain LX . 14.06 in the quarter .@95.75 mph / 1.79 60' No front sway bar. M/T slicks 3500 rpm launch, 11 psi on 89 octane, timing in the 14-16 degree range Done on a 70 degree day. Best 60' to date 1.77, best e.t. to date 14.01 by my brother.
Yea I had the 3.55 and went to the 4.10 and I love them they are great. But I dont know if you have a five speed or aod I have the aod. If you have the five speed some people have told me you can not shift fast enough and I have had people tell me that they love them so I guess its what ever works for you.
Back when my 89 LX was near stock I ran 4.10 gears with 26 in slicks. I was shifting into 2nd by the time I reached to 60 ft lights. I could not imagine running more gear with a stock 5.0. It just doesnt like to rev that high. Mine ran its best e.t.'s shifting at 5,400 on the factory tach. 4.10's are a lot of fun at the track if you powershift it. But based on my experience I would not recommend anything higher with a stock 5.0.
Thanks for the replies....yes it's a 5 speed car. I'm going to go with 4.10's for sure. With 3.55's in fifth at 75 mph the car is at 2300 rpm. The higher RPM won't be an issue. My daily driver is a manual car as well, so I dont mind shifting.
I like the way the 5.0 pulls out of the hole with the 3.55's.......I could just imagine the 4.10's I'll keep you posted.
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89 ' LX 5.0L coupe ex-crash victim.5 sp., 100% stock except for Dynomax Super Turbo mufflers. 2-1/2" tailpipes, airbag in right rear, K&N filter, 4.10's,subframe conn. A plain LX . 14.06 in the quarter .@95.75 mph / 1.79 60' No front sway bar. M/T slicks 3500 rpm launch, 11 psi on 89 octane, timing in the 14-16 degree range Done on a 70 degree day. Best 60' to date 1.77, best e.t. to date 14.01 by my brother.
I had my car upgraded from the rear axles, posi, subframes,driveshaft,upper and lower control arms and 3.73's.
I use the car mainly for drag racing. it's street legal ,but not a daily driver.
My car is basically stock with a 5-speed T-5 manual. I wanted 4.10's installed, but the owner of the race shop told me with the t-5 transmission, first grear is very low and with 4.10's installed 1st gear would be rendered useless. He's been drag racing and has been in business 20 or more years, so I went with his advice.
Car hooks good and leaves hard, I shift at about 5400,5500. Hit the speed traps at 96 mph in 4th 14.3 e.t. 1.9 60' consitantly.
You definately need slicks or drag radials with 3.73's or you'll just spin. I've been spinning some lately with the drag radials in the heat. I'm going to try driving around the water box and back my rears only in the water box and see if the car hooks better. I think I'm bringing water to line with my front tires (they are not skinny'sor drag fronts, they are bfg g-sports) and spinning just after I launch. Anyways, that's another story.
Make sure you talk to a race shop or someone experienced before you spend your money on gears. Call Ford Racings Hot Line. I did, and they suggested 3.55's. 4.10's are what you hear most about ,but it depends on how your tranmission is geared and the power band you'll be driving at. Good Luck
1993 GT Mustang / Stock 302 EFI / Edelbrock 5.0 Upper and Lower Intake / 75mm Throttle Body / C&L Cold Air w/76mm Mass Air / K&N Filter / Electric Fan / BBK Underdrive Pulley's / A.C. Removed / BBK Headers / Flowmaster / H-Pipe / T-5 / Alum. Driveshaft / 3.73 Gears / Eaton H.D. Posi / Moser 31 Spline Axles/ Subframe Connectors / Line Lock / Driveshaft Loop / B&M Short Throw Shifter / 16" Chrome Cobra Wheels / Nitto Drag Radials Rear / BFG G-Force Sport Front / Racing Upper and Lower Control Arms / Lakewood Adjustable Drag Shocks/ Holley 190 lph Fuel Pump / Holley Adjustable Fuel Pressure Regulator / MSD EFI Blaster Coil/ Stock Heads/ 19# Injectors
Hi, i just purchased 88 gt w/manual trans 5 speed. Would that be a t-5? What is T-5? Thanks for any info givin.
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Proud New Owner of a 1988 FORD Mustang GT 5.0L HO, H/B, 5 speed, stock. Up grades: MAC cold air intake. Ran 15.9's in 1/4 mile. Can't wait to start moding to get those times down to 13's.
The only problem I see with running 4.10's is if you run out of rpm. I have a friend with 4.10's and that car tops 4th gear at 110 mph. I have 3.73's and my best trap speed was 108 mph also on 26 inch ET Streets, I imagine if I had 4.10's and maybe the air was unusually dense one night, I may top out my car before the end of the strip. Not saying 4.10's are bad, just my situation.
Then again, you could always go to 28 inch tall tires.
Proud New Owner of a 1988 FORD Mustang GT 5.0L HO, H/B, 5 speed, stock. Up grades: MAC cold air intake. Ran 15.9's in 1/4 mile. Can't wait to start moding to get those times down to 13's.
I have a 93 that I run 26x8 M\T and I have 410s The big thing is rpm and hp if u get out of your hp ban you will lose et. You need to know where your cam makes hp and stay in that when you trap. I don't think the 410 will hurt.
considering gear change any suggestions 
