second try with new gears

[PSG]

went to the track for the second time today, put in 4.10s the other night , i expected better results, my e.t. came down, but only 2 10s, to 14.5, but funny thing is that the speed through the traps slowed down, with 3.55s it ran 14.7 at 95.5, now the best was 14.5 at 94.6, doesn,t make sense , the 8th mile was faster, but anyone run into this? the way i figured i should have picked up a few mph?

[MM_BKK]

2 things:

Are you running a new tune with your 4.10 gears?

Are you going through the traps in OD or D?

[PSG]

yeh i put in the DR tune for the 4.10s, and that i ran most of the runs with the od off, but the run that pulled the best, i forgot to shut off the od, but the car sat for quit a while before hand and had cooled all the way down, so that was what i was equating the better time to, i just figured the od being on didn't affect it, its going through the traps at around 4500 rpm, so i dont think it would be ready to go in anyway

[Mest30]

You have any other mods besides the 4.10s and tune? 14.5 is good for just those two. Was it 14.5 even or 14.59 or what?

[PSG]

no other mods, and it was actually 14.51 , but i just expected a bigger differance from the gears, maybe i was just too hopeful

[freakstatus]

I decided to pass on the 4.10's. I was all set to get it done until I found out it would cost near a grand...I'll use the money to save up for a Vortech...:)

[ts-pa]

I decided to pass on the 4.10's. I was all set to get it done until I found out it would cost near a grand...I'll use the money to save up for a Vortech...:)

A power adder is a great way to get faster times. The 4.10 gears will get the engine in it's most powerful rpm range faster than stock 3.55 gears would.

[Taemian]

I decided to pass on the 4.10's. I was all set to get it done until I found out it would cost near a grand...I'll use the money to save up for a Vortech...:)

Planning a self-install?:)

[sailsmen]

Temp/Hum can have a =/- .75 and affect Trap Speed. The Corrections help but do not comletely compensate.

[RAPTORAZ]

I decided to pass on the 4.10's. I was all set to get it done until I found out it would cost near a grand...I'll use the money to save up for a Vortech...:)


Who's quoting you $1K to do gears? A good set of gears is $150-175 bucks, and the install shouldn't cost more $250 at most.

[freakstatus]

Who's quoting you $1K to do gears? A good set of gears is $150-175 bucks, and the install shouldn't cost more $250 at most.

The best quote I got:

Labor: $385
Gears (Ford): $239
Install kit: $121
Oil: $40
Additive: $11

$800 plus taxes.

This is from a well respected Mustang speed shop in my area. All other quotes were around the same give or take. I could save some money with used gears, but wouldn't want to go that route.

[PSG]

$1000 is insane, the gears should't cost over $200 and even with a new seal and a pinion bearing (sometimes they get messed up coming off the old pinion) you shouldn't need more than another $50 ,and it only took me like 2 hours with an oil change and fixing a flat in the proccess.the gears deffinetely made the car respond better on the street, i would say it was well worth it, but agairn , i expected better 1/4 times

[RAPTORAZ]

The best quote I got:

Labor: $385
Gears (Ford): $239
Install kit: $121
Oil: $40
Additive: $11

$800 plus taxes.

This is from a well respected Mustang speed shop in my area. All other quotes were around the same give or take. I could save some money with used gears, but wouldn't want to go that route.

I just noticed you're in Canada. I guess this kinda stuff costs more there. I just had the entire rear end built in my Jeep. New gears, new Tru Trac differential, and all new bearings. Parts and labor was just a hair over $800. It would've been less, but all the Tech's at my shop(I work for a Ford/GM dealership) were afraid to touch it since it was out of their norm. I had one of our guys put 3.73's in my Mustang last summer. Cost me $175 for the FMS gears and $50 to have them put in.

4.11's coming soon to my Marauder.:banana:

[BATMANN]

I am having 4:10s installed at mustang magic in deer park on long island next week, including gears they quoted me $410 said it would take 3 hours.

[MENINBLK]

Going from 3.55:1 to 4.10:1 will get you faster acceleration and lower top end speeds.
You will get there faster, but you'll be traveling slower when you arrive.

It is hard to understand but it is just physics...

[PSG]

i understand the physics, ive raced other cars in past, and with that kind of gear ratio change ive had much bettert results. the engine is not even close to toped out so the lower top speed isn't the issue, it seems to come out harder, though the 60 ft times really dont reflect the change, still pulling a 2.25 which is almost identical to before, i am wondering if the shift points are to late, the seem to be about 6200 or so, i was thinking thet if it shifted at like 5800 it might be better, anyone tried anything like that?

[freakstatus]

I am having 4:10s installed at mustang magic in deer park on long island next week, including gears they quoted me $410 said it would take 3 hours.

That was the price range I was expecting....Maybe I should get the job done in the states. I'm 5 minutes from the border.

[Mest30]

no other mods, and it was actually 14.51 , but i just expected a bigger differance from the gears, maybe i was just too hopeful

Were your tires spinning more with the new gears in? This could affect how much of a change you saw as well.

[MM_BKK]

$1000 is insane, the gears should't cost over $200 and even with a new seal and a pinion bearing (sometimes they get messed up coming off the old pinion) you shouldn't need more than another $50 ,and it only took me like 2 hours with an oil change and fixing a flat in the proccess.the gears deffinetely made the car respond better on the street, i would say it was well worth it, but agairn , i expected better 1/4 times

WOW! It only took you 2 hours to replace rear gears with new bearings and seal and do an oil change and fix a flat? :eek: :bows:

Do you have any gear noise at all on your install?
Would you be interested in doing other member's car and what would you charge? Where are you located?

[MM_BKK]

Going from 3.55:1 to 4.10:1 will get you faster acceleration and lower top end speeds.
You will get there faster, but you'll be traveling slower when you arrive.

It is hard to understand but it is just physics...

Yes that's true, but you forgot this little thing about aerodynamics.

With 3.55 gears, if you could get the motor up to 6000 RPM in 4th gear you would be doing about 200 MPH, but you'll need to have about 500 RWHP to do that otherwise you'll be drag limited to something a lot lower.

With the 4.10 and no power adder, you could actually obtain higher top speed than 3.55 gears. The 4.10 will have more torque to power through the aerodynamics.
At 6000 RPM in 4th gear, you would be doing about 174 MPH which is more attainable.

[PSG]

no tire spin issues, and yes, 2 hours, thats what i do for a living, i'm a mechanic, and no it didn't have any noise, and i drove 120 miles to the track and raced all day and drove home when i was done. i'm in eastern ct about 20 miles north of bridgport

[MM_BKK]

, it seems to come out harder, though the 60 ft times really dont reflect the change, still pulling a 2.25 which is almost identical to before, i am wondering if the shift points are to late, the seem to be about 6200 or so, i was thinking thet if it shifted at like 5800 it might be better, anyone tried anything like that?

Your shift point will not effect your 60 ft times. I don't think you'll be in 2nd gear yet at the end of 60 ft, unless you start in 2nd gear or spun the tires like crazy from green light.

Wheelspin will drasticlly effect your 60 ft times.

[PSG]

the gear change should have affected the 60 ft times, the shift point concern, is getting the speed up at the end of the track, it seems like over 5800 the accelleration drops off alittle, but its not shifting till 6200, so if it shifts just before it drops off, it should pull more consistant through the shifts, i just figured if someone else already tried this they might know if this will help or is even feasable with the xcal 2 ?