mustang_gt808

05 mustang gt 5 speed question is if I install 4.10s. Is my top speed gonna be at 110 mph???

outceltj

why would u think that??? NO

mustang_gt808

I read some comments on American muscle of customers saying they top out 110mph

2009 Eleanor

I have 4.30s and taken it to 125ish in 4th with still a little more in it! My rev limiter is at 7,500 so I revved it out to get that speed. 3rd gears tops out around 106ish.

Nuke

You'll lose a little top end but not that much. 110 maybe in the V6 but the GT still has enough torque to put you in the 130's or possibly higher. With my 3.55's and 275/40/18's, the aerodynamics all but kill whatever is left power-wise at a bit over 150 MPH where I'm turning only about 4600 RPM in 5th. I redline in 4th at about 144 MPH.

PM me with your email for an RPM vs. Speed spreadsheet where you can input your setup. It's damned accurate (for me).

Nuke

Really? Factory is 6250. Brenspeed set mine at 6800 which scared the heck out of me so I dialed it down to 6500. I've bounced off it numerous times at 6500 but I'd chit myself if I set it above 7000 and bounced off it. 7500 and it didn't fly apart? I'm impressed.

bigmike06gt

144mph in 4th?? WOW! Mine topped out in 4th at 120mph at 6400rpm on the dyno(with the factory 3:55's) and even testing out the top speed it would top out just under 120 with the stock rev limiter at 6250ish

You will have no problem breaking 110mph with the 4:10's, I can easily hit 150mph in mine but that is about as high as it wants to go, like the guys say, aerodynamics take over at that point.

bakerjd

I can personally attest to being able to go over 110 with 4.10s

808muscle

I hit 115 mph at the drags in fourth gear with 4.10s and its still pulling hard! Dont be skierrt...........install em! LOL

mighted1987

ouch, id seriously get that rev limiter down, even when I had my forged engine I was set at 7200 max. im 6250 atm.