Need low end torque

[Jason1320]

My stang doesn't really start to pull untill after 5000 RPM. What can I do to get more torque on the low end?

[91LX2Bfast]

Numerically higher rear end gears.
3.73's are a minimum, but it seems that a lot of people have been going with 4.10's lately. Several company's make a 3.90 gear also, which might be a good compromise.

[MiracleMax]

Originally posted by Jason1320
My stang doesn't really start to pull untill after 5000 RPM. What can I do to get more torque on the low end?

:confused:


Peak HP occurs at 5250 rpm and peak torque occurs 4000 rpm

I can feel my car start to pull at about 3000+ rpm and its over somewhere north of 5000 rpm

in any event you've got to 6250 rpm before the rev limiter kills the fun

[04S/CStallion]

Unless ur gonna go different cam, I would definately agree with the gear. Motorvation makes a 3:90 gear if ur wantin more than a 3:73 but not as much as a 4:10, but I hear lots of people braggin about the 4:10, but I agree with you the lower end needs to get a bigger sac!!! I do know this get rid of the stupid 3:27!!!!!!!

[Jason1320]

I think the 3.73 is where I'm lookin'. I have to drive my car every day, I would like to keep the gas milage reasonalble. Took the car out to the track for the first time today. I found that rev limiter, not as dramatic as I thought it would be. I barley noticed right before I shifted.

[blue00gt]

I think you just need a supercharger :-)
With your mods your car should be almost done at over 5k, not just starting to pull.
As far as the gears go I personally think 3.73s are a waste of time. I have 4.10s and drive it on the freeway all the time to get to work and back. Go 3.90s minimum. I only noticed a 1-2 mpg loss after the change.

[GodStang]

If you have a 4.6 then get 4.10s for daily driver and 4.56s for drag car. 3.73 are just not worth it in a 4.6 but they are great in a 5.0.

[Jason1320]

Originally posted by blue00gt
I think you just need a supercharger :-)
With your mods your car should be almost done at over 5k, not just starting to pull.
As far as the gears go I personally think 3.73s are a waste of time. I have 4.10s and drive it on the freeway all the time to get to work and back. Go 3.90s minimum. I only noticed a 1-2 mpg loss after the change.

I'm still saving up for that supercharger. :rolleyes: In the mean time I'm trying to get the rest of the car ready. I just odered steeda underdrive pullys and was think about the T/A kit. Problem is, I still don't fully understand how timing works and need to learn more about it first.

Thanks for the advice on the gears. Gas milage is what I was really worried about. How much trouble is it to change gears? Or if it's to hard for a novice, how much does it usually run in labor? :rolleyes:

[blue00gt]

Underdrive pullies are a good mod because they add hp and torque throughout the rev range.
Timing is just when the spark plug fires relative to the piston being at top dead center in the cylinder. Advanced means that the plug fires before TDC (on the upstroke) and retarded means that it fires after TDC (on the downstroke).
I wouldn't recommend installing gears for a novice. Depending on where you live the labor could run anywhere from $150-$400 for install.

[TARZAN]

Go w/ 4.10's. I started w/ 3.73's, and upgraded. I actually have some 4.30's on the way now:D

Also, cams would help, especially a custom grind.


Pulleys may help, as well as better air flow in and out (intake and exhaust)......

Then go w/ a custom chip....

But a lower ring and pinion is your best bet. 4.10's would make you smile:)

-Will

[91LX2Bfast]

Originally posted by blue00gt
Underdrive pullies are a good mod because they FREE UP hp and torque throughout the rev range.

[explicitone]

go with the 4.10s
it will not kill your mpg at all I get better mpg because of the gears

you my run higher rpms on the highway but the car is not working as hard to run that high so you use a little less gas

and for the guy that said the limiter is 6250 that is not true they changed it , it is 6050 now!

i drive my car I put about 20k on my car a year(d/d) and I would have gone with 4.30s if i was not using the spray

[Jason1320]

Originally posted by explicitone
go with the 4.10s
it will not kill your mpg at all I get better mpg because of the gears

you my run higher rpms on the highway but the car is not working as hard to run that high so you use a little less gas

and for the guy that said the limiter is 6250 that is not true they changed it , it is 6050 now!

i drive my car I put about 20k on my car a year(d/d) and I would have gone with 4.30s if i was not using the spray

What did you do to adjust your spedo? I have a Jet Chip and it sucks. I wouldn't mind replacing it at all. Any suggestions?

[MiracleMax]

Originally posted by explicitone
and for the guy that said the limiter is 6250 that is not true they changed it , it is 6050 now!


When did they change it?

The only reason I can see for this is the longer stroke on the 4.6?

The total recipocating mass of the valvetrain is much lighter than on a 5.0.

[ac97gt]

Originally posted by blue00gt
I think you just need a supercharger :-)
With your mods your car should be almost done at over 5k, not just starting to pull.
As far as the gears go I personally think 3.73s are a waste of time. I have 4.10s and drive it on the freeway all the time to get to work and back. Go 3.90s minimum. I only noticed a 1-2 mpg loss after the change. do you have a 5-speed blue? do you still reccomend 4.10s for 5spd or only for auto?

[blue00gt]

I have a 5-speed. 4.10s all the way.

[GodStang]

Originally posted by Jason1320
What did you do to adjust your spedo? I have a Jet Chip and it sucks. I wouldn't mind replacing it at all. Any suggestions?


Dallas Speed recal unit. It is about 90 bucks. Just about everyone sells it. www.Steeda.com has it for sure and www.Dallasmustangs.com also has it.

[Red Mustang Gt 46]

Best bang for your buck...4:10's. I think anyone here would agree that the SMILE on your face would not go away for months...I think should be anyone's first mod...the little bolt-ons help BUT, gears are the way to go...

[Jason1320]

Originally posted by Red Mustang Gt 46
Best bang for your buck...4:10's. I think anyone here would agree that the SMILE on your face would not go away for months...I think should be anyone's first mod...the little bolt-ons help BUT, gears are the way to go...

I have decided to get the gears...now I just need to find someone to install them. The best est. I got so far is $1000, parts and labor (with spedo adjuster box). I know I can get it cheaper, I just have to wait.

[Red Mustang Gt 46]

Let me guess...??? E.L.D. performance? They are expensive!!! If and when your ready to do the install, I can recommend a couple of guys who do only driveline work at Ford dealerships...if your willing to travel north east...

Cliff

[xxxBlakexxx]

Hey, CJ Pony Parts in Harrisburg PA (which is not far from MD) does EVERYTHING on Mustangs. They are putting in my 3.73 for me (yeah, I am going with the 3.73...seems like best fit for us).

here is what they charge:

Gears - $189
Other parts - $89
Labor - $230

I bought my gears at mustangtuning.com for $149. So that should be a complete job for under $500 AND they warrenty all their work. I am having them install my subframes and exhaust at the same time.

How close do you live to Harrisburg? They are North of the city on Rt 22. I would say from the Baltimore Airport, CJ Pony is about 90 minutes.

[explicitone]

you guys that are getting gears
go to www.gefracing.com they sell the gear sets for 139


for all getting gears good luck cause I see a few getting 3.73s
all i can say is 3.73s suck for the 99+ the reason 3.73 were so great for 5.0s is cause 1st they came with 2.73 or the autos 3.08
and the 5.0s made more power down low with a peak horepower around 4400 but the mod motor needs the extra gear,they peak at 5000 (not 5250) so you need to shift at around 55-5700(stock) . with a 3.73 gear it will put you way out of the power band when it comes to drag racing at the end of the track causing your times to not be what they should be

[xxxBlakexxx]

Ok, I think I understand what you are saying. Basically, the 4.10's put you in a better "sweet spot" when running the 1/4 mile? You end the race at the peak rpms for hp? Is this what you are basically saying? Makes sense if it is true (And I am sure that it is).

Most guys hear seem to agree that 4.10's are a better gear selection than 3.73s. But, when I talk other experts at performance shops, i am being told to go with the 3.73s.

Explicitone, I want to make the right choice and I can always appreciate good advice. I can always change my order...it is no big deal. My major concern is that my wife drives this car a lot too and I don't want any complaints from her. My goal in going with different gears is to give the car more pep but I am not that concerned about the track.

You could really help me if you could tell me how I can find the gear ratios for each gear when using 3.73 or 4.10's. I would like to input this data into a computer analyzer and see how they compare. Do you follow me? I can get the data for the 3.23's but not the others. Or, do I just convert it? If so, how?

Thanks!

[Red Mustang Gt 46]

Blake...since you mentioned your wife driving the car...with 4:10's your shift from 1st to 2nd is going to be rather quick. Some who are not "into" performance driving can get annoyed with this. With 3:73's I doubt that your going to notice a big difference.

IMO, I would still go with 4:10's...don't be scared it's going to be too much...cause it ain't. As stated before, you will smile for months...

[DrJaysBlown5.0Mod]

If you're looking for more low end torque without spending a lot then gears are the way to go. They will effect your gas milage some, but not horribly. 3.73s are fine for a daily driver, especially if you do plan on adding a supercharger some day. If the supercharger is just a dream then go with the 4.10s. Now if you want REAL low end torque with essentially no effect on gas milage then add nitrous. You'll get lots of torque and you'll only use more gas when you need it, that is when you spray. But the rest of the day you'll get the same gas millage as normal. When it comes time to get your blower, a Ken Bell or roots type will give you more low end torque while a centrifugal blower like a vortech or paxton gradually kicks in but peaks higher and at a higher rpm.
Good luck!

[xxxBlakexxx]

I am VERY interested in nitrous! And have been doing much research on this to learn as much as I can. You guys have virtually sold on the 4.10's and I am going to have to make a few calls on Monday. Hopefully, they did not ship my 3.73's yet. But, I would rather be happy, then spend a few extra $ on freight.

Interesting though, NOBODY has told me to go with the 3.73's. Sure, lots are happy with them, but no one has jumped out and said 3.73 are the way to go over the 4.10's.

With that said, what gears should I have with nitrous? I will ask the POWER ADDERS too this question as I am planning on adding nitrous within 12 months. I will let that be the driving force on this decision.

[explicitone]

Originally posted by xxxBlakexxx
I am VERY interested in nitrous! And have been doing much research on this to learn as much as I can. You guys have virtually sold on the 4.10's and I am going to have to make a few calls on Monday. Hopefully, they did not ship my 3.73's yet. But, I would rather be happy, then spend a few extra $ on freight.

Interesting though, NOBODY has told me to go with the 3.73's. Sure, lots are happy with them, but no one has jumped out and said 3.73 are the way to go over the 4.10's.

With that said, what gears should I have with nitrous? I will ask the POWER ADDERS too this question as I am planning on adding nitrous within 12 months. I will let that be the driving force on this decision.

dont worry about your wife driving the car mine drove car right up untill I got the spool install and I have had 4.10s for over a year(spool went in 2 days ago)

put this way people that are worried about gears if the rain try driving a mustang with a spooled rearend and 4.10s in the rain

guess what just as easy as when stock NO PROBLEMS

gears and n2o can be a tricky one Im running 4.10 and n2o(100 shot) but with running a 100 shot I need to raise my limiter to 6500(I will trap at 6100 I just dont want the n2o to shut off in the last 200ft) now with a 75 shot you would be fine


people that dont know the mod motors or take the advise from someone that knows older cars )5.0s camaros etc...etc..) will always tell you 3.73s the shop I had mine done they were like your going to drive 4.10s on the street and **** and now the new shop that did my rear they were like your going to drive a spool on the street and well I can drive both without a problem.

if you 1/4 race I would get the 4.10s and then just turn the spray on in 2nd gear so you dont have the traction issues you would going off the line on the spray

[96_4.6]

DAMN $1000 is alot of money for gears. I got ripped off but I only payed $689.63 but I got the FRPP 4:10's, labor to install them, speedo gear and a rebuilt trac-lock.

[explicitone]

Originally posted by 96_4.6
DAMN $1000 is alot of money for gears. I got ripped off but I only payed $689.63 but I got the FRPP 4:10's, labor to install them, speedo gear and a rebuilt trac-lock.
if that was the price for the gears ,rebuild kit bearings,fluid and labor you got a great deal
now if thats only labor yeah thats jacked up


cause i only paid 592$ for install on my spool,axles,c-chip elims(you have to cut the axle tubes down and hace the brake plates on machined down to work with the c0chip elim) all new bearings
subframe connectors welded in and axle tubes welded

thats was for all labor and bearings the rest I brought

[xxxBlakexxx]

How do you know if you should rebuild the trac-lock

[explicitone]

Originally posted by xxxBlakexxx
How do you know if you should rebuild the trac-lock \


if your getting the 1 wheel peel when you get on a open back road rev it a little and do a burnout if only one wheel spins it needs to be rebuilt

[JBeryleC]

Ok... question..

I am thinking of caming & gearing mine...

Comp Cams suggests 3.55 gears with their 102200 4.6 SOHC Mild street Cam

And you are all suggesting WAY lower gears. Why?
Is it just because no one has brought up Cams, and only talked about n2o and/or superchargers???

I have no plans for nos or supercharging. But I DO want a little more lower end power. I heard the above cam is awesome.

Anyone have it? If so, what kind of hp & trq does it add?
Any suggestions?

Thanks,

[blue00gt]

Numerically higher gears will work better with the cam, too. They just say 3.55s minimum because you're losing some low end with the cam and you don't want it to take forever to get into the power band.
4.10s minimum for a '99+ GT; I don't care if it's an auto or 5-speed. The optimum gear for a car depends on the engine's powerband, gearing in the tranny, etc. 3.73's are great for '96-'98 4.6 2Vs and 5.0s, but they make power down lower than the newer motors do.
I have driven 1500 miles in a weekend with my 4.10s and didn't mind them at all.

[JBeryleC]

No, they suggest 3.55's maximum for that cam

And that cam doesnt take any low end, it gives more low end.

It moves the complete powerband down a little. low end kicks in sooner and peak isnt as high rpm as stock.

take a look at their site. let me know what you think.

I'm not arguing the gear ratio opinion, I've gathered that EVERYONE likes the 4.10's better... but I am needing to know what exactly that cam is gonna give me.

I'm not a dragstrip racer, so I want to mix the best cam with the best gears to get a good low end pull like in 4th or 5th gear and still have the peak horse power as well.

Has anyone else noticed that in 4th or 5th... anything below 2800 or so... is gutless! I wanna be able to pass the slow pokes without downshifting! :)

[explicitone]

then thats cam would not be very good for drag racing/street racing cause you pend more time from 3500 -6000 the only time you would below that would on the 1st gear hit you would not be there to long

I would much rather use either the stage 1 or 2 vtengines cams
they seem to make more power

the stage 2 cams on stock heeded(nonP&P) with stock headers picked up 22rwhp

the stage 1 on a stock headed car with long tubes and bullit manifold picked up 22rwhp

[JBeryleC]

Yeah I read all that too.

but does anyone know how much hp & trq the comp cam adds, on a completely stock motor???

[cornuts]

hey guys iam installing 4.10s this weekend on a 98 gt auto anything i should know? and how do i recal the spedo on a auto? thanks

[Narshadda]

Guys, I can see how 4.10's would work well in a 1/4 mile situation. But, how about in a road race type situation. I am starting to get more into the road race thing, and less into drag racing. My buddy has a WRX Sti which I think comes with 4.10's and it is a pain to drive around the track, he is constantly having to shift.

Which company is it that sells 3.90 gears? I think that would be a better fit, but I am just starting to do the research so I have time...