V6 gears and other Mods

danielr410 · Jul 19, 2022

Hello.

I recently bought a 94 v6 convertible auto. Looking to do some mods but my budget is low and also Im not in the US.

Mi first question is: Should I get 3.73 or 4.10 gears? I know most people recommend 4.10 for autos but I dont want to be at 2500-3000 rpm at 70MPH. I want to improve my acceleration so is there a lot of difference between those two?

Also, is absolutely neccesary to add a LSD? As I said I am not from the US so having one shipped yo my country (Colombia) can be very costly due yo its weight.

Also looking for some opinions about intake and TB spacer, UDP and CAI.

Warhorse Racing · Jul 19, 2022

You can use an online calculator to determine your rpm in each gear. Here's a link to one:

Spicer Transmission Ratio RPM Calculator

Use the Spicer Transmission Ratio RPM Calculator to determine your engine’s RPM based on the transmission gear ratio, tire height, MPH, and ring and pinion gear ratio.

spicerparts.com

A limited-slip differential will help get the power down and is much better for performance driving. Whether or not it's a necessity depends on how you plan to use the car.

There are a number of companies that make upgrades for V6 SN95 Mustangs. It's a little harder to get power out of the 94-98 V6 cars.

I've never been a fan of intake and TB spacers on V6 cars. I would suggest looking into Harland Sharp 1.8 Roller Rockers. I use them on my 2004 V6 autocross car and they make a big difference. They are relatively light to ship and relatively easy to install. The roller rockers, along with a CAI, larger TB and a dual exhaust conversion will give you a little more power and better throttle response.

There are versions of the mods I cover in this video that will work on your car (keep in mind the part numbers might be different for your car).

View: https://www.youtube.com/watch?v=vbHHYAwMUmg&t

danielr410 · Jul 19, 2022

Thank you for your answer.

I think 3.73 gears would be more suitable for me. Would that be a major improvement from the stock 2.73 gears right? I just want the car to be more fun, it kills me that off the line acceleration.

About the rockers, it is the first time I read about that. What exactly do they add that make more power? I found them on ebay and they cost $900!!! that is too much for me right now

As for the throttle body, the only one I found that fit my car is this one:

NEW BBK 94-98 KIT 1548 FORD MUSTANG 3.8L-V6 56MM POWER PLUS THROTTLE BODY | eBay

Find many great new & used options and get the best deals for NEW BBK 94-98 KIT 1548 FORD MUSTANG 3.8L-V6 56MM POWER PLUS THROTTLE BODY at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Can I expect some noticeable gains with that one?

Warhorse Racing · Jul 19, 2022

You will definitely notice an improvement going from 2.73 to 3.73. Keep in mind that the automatic also factors in to how the car feels under acceleration.

The 1.8 roller rockers increase horsepower by reducing friction and increasing airflow. You can get the roller rockers from Harland Sharp for about $430. Here's a link: https://harlandsharp.com/collection...s/products/ford-3-8-v6?variant=40820520976536

When it comes to the other engine bolt-ons for the V6, one is almost never enough to make a huge difference in how the cars feels. The V6 is really restricted, so it benefits from multiple bolt-ons that work together to increase power and throttle response.

danielr410 · Jul 19, 2022

About how much hp and torque (I actually care more about torque) can I expext to gain with those rockers?

To be honest, I'm planning to spent not more than $600-$700 in the next year. I know it is not much but at least the labor here is pretty cheap, for example a good shop can do my gears for like $100.

What about UDP? this one seems interesting:

MAC 94-98 Ford Mustang V6 3.8 Underdrive Pulley Kit Crank 89-98 Thunderbird 97 | eBay

Find many great new & used options and get the best deals for MAC 94-98 Ford Mustang V6 3.8 Underdrive Pulley Kit Crank 89-98 Thunderbird 97 at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Forgot to mention the car has dual exhaust, it is 2" divorced duals with original cats and some rusty mufflers that make it sound horrible lol. Maybe an X o H pipe system can add a little more power?

Im not looking to have and incredible fast car, but at least more fun to drive.

Warhorse Racing · Jul 19, 2022

Getting the most out of your budget is key. All of my cars are built with a budget in mind. Based on your budget, you will see the most improvement out of rear gears.

I used an underdrive pulley on my autocross V6 in conjunction with the other mods. I don't see that one mod making a huge difference by itself on a 94-98 V6. And there are other concerns about charging that come along with underdrive pulleys that wouldn't make them my first mod.

My advice would be to look at mods that will increase throttle response, they will make the car feel better. A Cold Air Kit and a TB will work together, headers will help some (but an X-pipe and a better cat-back system would do more).

limp · Jul 19, 2022

I would try the gears first... going from 273 to 373 gears will feel like you put a supercharger on it....

danielr410 · Jul 19, 2022

That was my thought, but can gears still be a noticeable change without límited slip?

limp · Jul 19, 2022

Sure......

danielr410 · Jul 19, 2022

Perfect...

So about exhaust, if I plan to add an X Pipe would one of these work fine? Or should I ask a shop to custom make one?

X-Pipe 2 1/4" x 2.25" Exhaust Adapter Connector Dual Coupling | eBay

BRX225 Mild Steel Reversible Exhaust Stamped X Pipe Adapter Connector 2 1/4” 2.25" Dual To 2 1/4" 2.25" Dual. Your original invoice and picture of the failed connector while still installed will be required for warranty.

www.ebay.com

Also, should I get high flow cats? I don't want any O2 sensor annoying lights.

danielr410 · Jul 21, 2022

I was thinking maybe a shift kit would be useful? Does anybody has tried the transgo shift kit in a v6? Somebody told me it could help the acceleration.

LILCBRA · Jul 21, 2022

A shift kit will do nothing for acceleration. It will, however, change how and/or when your transmission shifts.

Going from a 2.73 to a 3.73 will be a very noticeable change. A LSD will only affect how your car will launch, it will not affect the effects of the gear swap. All a LSD will do is make it so both tires spin instead of one when you launch. BUT.... if you want a LSD, installing it during a gear change is the preferred method since it can all be done at one time. Another point to mention, changing your gear ratio will affect your speedometer as well, so that might be something you want to address when you're having the work done.

If you're limiting your budget to ~$600-700, I'd definitely concentrate on the axle first. I'd pick up a LSD (since I'd only want to have the rear end torn apart one time...), gears, speedometer gears to correct the inaccuracy, and go from there. Factor in oil and incidentals and I'd suspect that that would exhaust your budget. Then, when funds allow, pursue the other good advice that was given here. I think you'll be pleasantly surprised at what kind of difference just swapping the rear gears will give you.

danielr410 · Jul 21, 2022

So whats the point of a shift kit? Shorter or longer shifts? How does exactly change driving experiencie?

Also which speedometer gear should I get for 3.73 gears?

LILCBRA · Jul 21, 2022

Shift kits can help you to maintain a gear and give you more control over shift points compared to a stock valve body. They can also "tighten" the shifts by adjusting the hydraulic pressures, making the shifts faster.

As far as a speedometer gear, you can use this calculator from LMR.com:

https://lmr.com/products/Mustang-Speedometer-Gear-Calculator?gclid=Cj0KCQjw8uOWBhDXARIsAOxKJ2F4t-J-V6TTNS5pFqZugoNKtWRaETQlRhzRmlRFQ4FGOmuA9OD7x9YaAtYxEALw_wcB

danielr410 · Jul 21, 2022

So I need a 23 tooth, on ebay they are black and also white ones. Is there any difference between those?

Also I've read on another posts that 23 tooth gears wears really fast, is that true?

LILCBRA · Jul 21, 2022

I can't really answer those questions. I'd suspect that the only difference between the colors might be for transmissions of different years? But that's just a guess. And I can't answer the wear question at all, I have no experience with them in that application.

LILCBRA · Jul 21, 2022

Looking at LMR's website, they indicate the black one is for automatic cars, white is for manuals.

manicmechanic007 · Jul 23, 2022

Go with the 3.73's
Don't mess with the speedo driven gear until you see where you are at in the end

rednotch · Jul 23, 2022

Do they have wrecking yards there with ford rangers or Areostars or explorers? If they do save your money, ford gears from a wrecked ranger with a 7.5 rear end is a cheap source for 3.73 or 4:10 gears and a ford traction lock, or you can try to find a complete.8.8 with gears from a v8 mustang if you plan to engine swap it later on. Bolt ons for a 94 3.8 vert isn't really practical for the small gains vs the cost.

danielr410 · Jul 23, 2022

rednotch said:
Do they have wrecking yards there with ford rangers or Areostars or explorers? If they do save your money, ford gears from a wrecked ranger with a 7.5 rear end is a cheap source for 3.73 or 4:10 gears and a ford traction lock, or you can try to find a complete.8.8 with gears from a v8 mustang if you plan to engine swap it later on. Bolt ons for a 94 3.8 vert isn't really practical for the small gains vs the cost.

They where some rangers and Explorer, but I don't think as much to find parts that easy. Plus here they will sell a used rear end for about $400-$500.

Also know I will never do an engine swap since its almost Impossible to find a V8 from a mustang Gt. There are a lot of 302 in junkyards but with a carburetor lol.

V6 gears and other Mods

Member

Member

Member

wrap a little cheese around it and its a done

Member

wrap a little cheese around it and its a done

Member

Member

I wish I didn't have all of these balls in the air

Member

I wish I didn't have all of these balls in the air

Member

I wish I didn't have all of these balls in the air

I wish I didn't have all of these balls in the air

I'd like to remain having one chocolate starfish

Member

Similar threads

Privacy & Transparency

Privacy & Transparency