For anyone running 4.10's what are you other mods, and what is your 1/4mi mph?

With the 3.55's I feel I am giving up some mph in the 1/4. I am only turning 4300rpm going through the lights with the OD off. Thinking of a converter and 4.10's this winter. Want to get over 110mph.

 

I have 4.10's. I ran a 12.37@108 last Friday. This is on 28" Hoosiers, crossing the line in 3rd at 5800rpms. She is screamin'.

mods:

LFP 4# lower
LFP 2# upper
full Bassani exhaust
Cal-tracs
oval TB
90mm MAF w/cone filter
PSP 4-way
JWG electric fan
Cobra water pump
Level 10 shift kit
4.10's
28x14.5x16 Hoosiers

 

Thanks 99. I was hoping to see some higher mph numbers. I was thinking I was running through the lights at less than optimum rpm. I was hoping that raising the rpm up may also increase my mph. Doesn't look like that is the case. Back to the mod drawing board.

 

i wanted to get some 3.73's. if i put those in and since i have a 99 with lower gears would it mess up the tranny in any way?

 

Mike,
They won't hurt anything. You will have to have your speedo calibrated.

 

Silver
113.47 mph is my best and like 99SVT said she's a screamin.

Thats with 4.10's, a PI converter (Locked) and 30" tall Goodyears.

Might be down your way to see if it will do better on Sunday.
Dale

 

i really like the 4.10. i install them a month a go,last saturday i run 11.81 @115.41 with a 1.72 60" time i run m/t 28x13.50 -15

 

if I install 4.10 or 3.73 on my 2000 L what will it do when Im running on the hiway? Also not like it matters but how bad does the gas mileage drop?

 

3:73's or 4:10's will have no adverse effect on your Lightning. Speedo will have to be recalibrated through a reburn of your chip. Gas mileage has not been effected with my 4:10's at all. I have gotten and am still getting 14.5/15 mpg. Rpm's running 200 higher at 70mph on highway. Not to mention the fun factor.
I would recommend them highly.

Mark/LFP
www.lightningforceperformance.com