Anyone running a 4.05 drive on the street with lots of power? Instead of artificially making my gears alonger by throwing a stupid big tire on it (235/60/15 M/H) Id like to keep a 24" tire. This car is mainly street driven with a 4.226 FD on a GSR trans.

 

i have for years. love it. also put the ls 5th gear in it to get awesome gas mileage!

 

Who makes this 4.05 FD?
Lightning whats your top speed in 4th gear with the 4.226FD?

 

its the stock ls final. and any aftermarket company that makes final drives have the 4.0

 

Mfactory, gear-speed, synchrotech I think
Calculated it should be 141. Im seeing about 135, GPS confirmed at 8700 rev limit, 225/45/16 R888

 

i was running a 4.4 final drive and a ls gear set, just switched to gsr 3-4 and like it alot better. im not sure if your going the right way. what kinda of power are you making?

 

525 now, probably near 600 next year

 

It'll help but it's not like it'll be a WORLD of difference. I ran the 4.05 FD a long time ago and loved it. I went through a couple stock 4.4 and 4.26 FDs and the 4.05 lasted way longer for DD and drag racing. No more stripping the gears off.

 

mine made a WORLD of difference on my car. went from a b16 to a gsr 1-4th and ls final. better 60,1/8th and was using way more of my power band. but at 500whp i rung off 4 stock final drives. always shitty tracks tho and would wheel hop at the top of first and thats all it took. i bought a m factory 4.05 but never used it. still have it if anyone is looking. b16/ls bolt pattern.

 

Is that the pro series gear or the street/strip gear?

 

i dont know how to tell the diffrence?lol its the old style as there website pics show. it doesnt have the extra holes cut out of the ring gear. put it this way, i was told when i bought it that it was the pro series. it did not come in a box. pm me your number and i can send you a pic of it.

 

I'm pretty sure it is just the revised 4.923 gear that has the extra holes.

 

for what i paid it better be the damn pro series! but just looking at it and seeing the quality i dont think there is any way its the cheaper street series.

 

The only visual difference in the PRO and Street/Strip or Road/Race final drives is the color and finish due to the WPC.

 

one of the local guys run it in their 800whp civic... it's fucken awesome.... trapping at +140mph he said he crosses the line at like 8600rpms or so.. (gsr tranny with 4.02 fd)

 

What size slick.

 

sorry 9600rpms... lol i recall 24.5 x9

 

lol. ok. i was like huh?

 

Evans Tuning installed the 4.05 Mfactory Final drive in my 500whp ITR. They also put in the MFactory 3.07 1st Gear, GSR 2nd Gear and LS 5th gear. I have not tracked the car yet but I have put over 5000 miles on this setup on the street and I have been very pleased with it versus the stock gear ratios and final drive. With boost-by-gear and high performance summer tires the car is much more driveable over the previous setup and gets better mpg.

 

Chris, is this what you are doing over the winter?