Differential Ratios 515

[afterdark]

My (new) 515 is too lowly geared.....can anybody tell me what the available differential ratios are? My 515 is down-plated from factory to 3.5ton hence there is no speed limiter or tachograph required. Current revs at 100kmh =3000 which is VERY hard on fuel consumption.
Im considering having the 315 diff fitted....has anybody had this alteration carried out....and was it successful?

Thanks in advance,

CD

[radiotwo]

Originally Posted by afterdark

My (new) 515 is too lowly geared.....can anybody tell me what the available differential ratios are? My 515 is down-plated from factory to 3.5ton hence there is no speed limiter or tachograph required. Current revs at 100kmh =3000 which is VERY hard on fuel consumption.
Im considering having the 315 diff fitted....has anybody had this alteration carried out....and was it successful?

Thanks in advance,

CD

Hi CD

That seems very high, I have a 318 with a Auto box and higher ratio back axal and get 60MPH (100Kmh) at 2000rpm.

But sorry cannot rember what the diffrences are, Do you know what ratio you have at the moment?

I wonder what mph you get?

Radiotwo

ps I am sending you a PM

[afterdark]

Hi radiotwo.

Ive responded to your PM.

I dont actually know what my fuel consumption is, but it is significantly worse than my old sprinter (which had 200k on the clock). My old sprinter did something similar to yours....about 60mph at 2000rpm.

Nor do I know what the actual ratios are...I was hoping that somebody here might be able to help.

AD

[Col]

Bit of Fred drift here, but what did you have to do to down plate?

[ionut1410]

the same problem i hawe with a 413 cdi

i look om my diferential and ratio is 35:8

maibe someone can tell us what ratio hawe on ather car

please say what speed on what rpm
thanks!

[radiotwo]

Originally Posted by ionut1410

the same problem i hawe with a 413 cdi

i look om my diferential and ratio is 35:8

maibe someone can tell us what ratio hawe on ather car

please say what speed on what rpm
thanks!

Hi ionut

I don't know where you are getting your ratio's from (35:8)?

but a standard ratio should look like 3.923:1 which is correct
for a 318cdi

so you need to look elsewhere for the ratio!

Radiotwo

[ionut1410]

no its ok this means the ratio for my car is 4,375 :1 its a diferit method tho calculate !
standard is 3,923 you say its corect for 318
ok lest see on other car !

[ionut1410]

http://www.detali.ru/cat/oem_mb2.asp...SGR=350&SGN=03
i think i found what i want look here this is for my car look down of page on codes how much gear ratio exist !
my problem now is y can change just that part not all diferential ??