[smburney]

Hi everyone, this is my first post on the forum. I was planning on upgrading my cobra with 4.10 gears but then decided to add a Vortech supercharger. Now I was told that getting gears that low (higher number ratio) with a blown engine would be a mistake. I plan on using the car mainly for daily street driving, with rare trips to the track. The same person suggested I use 3.73's with a blown engine. Please provide any input to this problem. Thanks!

[guitarist9008]

Originally Posted by smburney

Hi everyone, this is my first post on the forum. I was planning on upgrading my cobra with 4.10 gears but then decided to add a Vortech supercharger. Now I was told that getting gears that low (higher number ratio) with a blown engine would be a mistake. I plan on using the car mainly for daily street driving, with rare trips to the track. The same person suggested I use 3.73's with a blown engine. Please provide any input to this problem. Thanks!

Wait, 4.10s are too low, so use 3.73s? It depends what you want. If it's a manual, and a daily driver mostly, I'd go with 3.73's. 4.10's while rob your gas milage when you're constantly in the higher power band. Then again, with a blown cobra, I don't think gas milage is an issue..

[04KenneBellGT]

Well due to traction issues and missing boost, ya might wanna go with 3.73. I love the setup i have on my GT but we have diff kinda blowers. But even witht he centri blowers i think 4.10 are too much, but there are some guys on here with that setup who seem to like it. But if it were me, 3.73 would be the way.

[Cobrals1eater]

If you can get traction, 3.73 will be a good gear.

[smburney]

And one more thing. I don't really want to spend the money to get the car tuned right away. If I get a Speedcal from american muscle with the gears and also have the chip that comes with the Vortech Kit will I be fine as far as tuning goes. I looked into getting a speedo gear but found that 99+ mustangs must be electronically tuned.