Diff > Fuel Consumption

[coolkid]

hey guys. just thinking about changing the diff in my car and wondering what sort of impact it will have on my fuel economy, im talking maybe a 3.73 diff swap. not 4.11. no one reccomend it coz I cant afford that much a week on fuel lol

[Doogstar]

I will start by saying sorry, but...

I had 4.11 diff gears on my NA XR6 (best mod I ever did) also had a 3000rpm hi-stall, used to get 13.6L/100. I still hold the B-series NA6 record as well.

If you go 3.73 you will always be wondering what the 4.11's would be like.

[coolkid]

so doog with the 4.11's you were still gettin 500 to the tank? dont think I will get stall converter due to my car will be mainly a dd, just the occasional test n tune day. going to 3.73's will still notice a massive increase in acceleration compared to stocko right?

[Guest]

I had 4.1's in my BA T with 6 speed manual & 340rwkw... Fuel consumption was barely affected as I drove it like I stole it before & after the swap! Lol.

If you're worried about fuel, I'd advise not modding for now

[coolkid]

not really worried about the fuel, if I was worried about the fuel I wouldnt of bought an xr6 lol, just didnt know how drastically the diff would effect fuel consumption, due to things ive been reading the 4.11 chews through the fuel

[typhoon_freak]

just do it.. your always going to chew the fuel if u drive it hard

[Doogstar]

Mine was my daily driver, yep about 500 per tank and believe me I didn't baby it.

You will notice the difference with 3.73 but you will FEEL the difference with 4.11's and people who say it chews through the fuel normally haven't got them. Maybe try 3.9?

[Guest]

Forgot the NA ran a different diff to the turbo. They make 3.9's to suit so go for them... That was what I wanted originally but they didn't make them

[104ord]

where can one source these diff gears and what are they worth to get changed over

[coolkid]

from what ive heard 2 grand with an lsd, or 1300 without. not entirely sure where can get it done yet..