E30 Zone

My winey diff could do with changing to a quieter one, and was thinking changing to a shorter one to make it quicker

has anyone got any experiance with either a 4.27 or 4.45 diff

also does anyone know what revs it would be doing at 70mph in 5th with both diffs


i mainly do town driving and maby once or twice a month do a couple hour drive down/up the motorway

Thanks

I know Dan318iS had a 4.27 LSD in his and i think i found it fine on motorways, went Le Mans with him the other year and he had no complaints and a few weeks later he drove it down to the south of France and reported some pretty good MPG. I seem to remeber him saying it had a similar affect to how the car drove to my JBR flywheel.

Not sure what a 4.45 would be like but i have a nice quiet one on ebay at them moment .

With the 4.27 diff you will have 3400rpm at 70 and with the 4.45 3500rpm.

With the std 4.10 ratio 70 mph is at 3250

Kedge wrote:I know Dan318iS had a 4.27 LSD in his and i think i found it fine on motorways, went Le Mans with him the other year and he had no complaints and a few weeks later he drove it down to the south of France and reported some pretty good MPG. I seem to remeber him saying it had a similar affect to how the car drove to my JBR flywheel.

Not sure what a 4.45 would be like but i have a nice quiet one on ebay at them moment .

i belive it was you i asked a question about shipping last night

DHFiS wrote:With the 4.27 diff you will have 3400rpm at 70 and with the 4.45 3500rpm.

With the std 4.10 ratio 70 mph is at 3250

Is that it, i think i will go 4.45 then

i was thinking 4000 -4500 rpm at 70mph

4.27's work well on an is, they make them more interesting

a 4.45 may make it more interesting

Alex wrote:a 4.45 may make it more interesting

no, it just makes the gears really short and boring.

but the power band is high up in the revs on these turds

or would i get sick of changing gear

Alex a couple more cylinders would make it more interesting

Oh come on it was only a matter of time

capri_rob wrote:Alex a couple more cylinders would make it more interesting

Oh come on it was only a matter of time

i 100% agree but the next engine up a 320i will cost an extra £500 to insure

i'am debating an engine conversion next year

Alex wrote:

capri_rob wrote:Alex a couple more cylinders would make it more interesting

Oh come on it was only a matter of time

i 100% agree but the next engine up a 320i will cost an extra £500 to insure

Ouch !!!

Was only pulling your leg fella

How much No Claims discount do you have now ?

capri_rob wrote:

Alex wrote:

capri_rob wrote:Alex a couple more cylinders would make it more interesting

Oh come on it was only a matter of time

i 100% agree but the next engine up a 320i will cost an extra £500 to insure

Ouch !!!

Was only pulling your leg fella

your rite though

capri_rob wrote:How much No Claims discount do you have now ?

1 year will get 2 year in feb 2010

Just save up and get a proper engine next year

I think 2 Years claim free should see you with quite a drop in premiums - IIRC I went from a 1.3 Astra L to a 1.8 Cavalier SRi just after I had 2 Years NCB for about the same insurance cost

Alex wrote:

Kedge wrote:I know Dan318iS had a 4.27 LSD in his and i think i found it fine on motorways, went Le Mans with him the other year and he had no complaints and a few weeks later he drove it down to the south of France and reported some pretty good MPG. I seem to remeber him saying it had a similar affect to how the car drove to my JBR flywheel.

Not sure what a 4.45 would be like but i have a nice quiet one on ebay at them moment .

i belive it was you i asked a question about shipping last night

Arh i see, was wondering that, does that mean you want it then?

will let you know

not sure if i want a 4.45 or 4.27 still

4.10 is fine, motorway miles will be hatefull with a shorter final drive and the diff will be completely useless if you did an engine swap later.

3.91 is cheaper and easier to come by if you want a slipper, and a few extra ponies from a chip and BBTB will make the steeper ratio disappear completely.

4.27 isn't too bad on motorways to be honest. I think 4.45 would get very annoying very quickly. A 4.27 diff in my touring feels a little nippier than my old saloon with a 4.10, so a 4.27ed saloon should be pretty good really.

And I feel your pain with this insurance malarky, although now I can insure a 6 pot, I just don't have the cash to get one

Living in jersey and our great little windy roads, I want a short ratio LSD for my 325i. We have a top speed of 40mph <<pause for the laughs>> (not to say everyone sticks by that) but its all about handling and acceleration over here as theres nowhere to have a really good run *safely* unless you find your way into the car club and enter the rare sprints and hill climbs etc.

What I want to know is I've heard 4.10 LSDs are ok, but will the higher ones like Alex mentioned be chewed to pieces by a powerful M20B25? Will they cope at all? I mean even a 3.91 or preferably 4.10 would be great, but going into the higher ratios will be more suited for my humble little home rock.

3.91 is cheaper and easier to come by if you want a slipper, and a few extra ponies from a chip and BBTB will make the steeper ratio disappear completely.

i'am thinking that with a 3.91 a bbtb and chip will be wasted, though

think i will play it safe and go for 4.27 rather than the 4.45

Grindculture- how much quicker is it, just a bit nippier or noticably quicker??? what do you prefer????

I thought 4.27s were very very rare to find though, or is that just LSD versions?

LSD version will be, all 316i tourings have them

actually there is a 316i touring parked outside my house

Theres one sat on my garage floor too

lol, hmm, how quiet of a worker are you , some chavs managed to remove my friends turbo recirculation valve from his impreza one night without him waking up.

Alex wrote:Grindculture- how much quicker is it, just a bit nippier or noticably quicker??? what do you prefer????

It's only a little more noticeable in my car as I'm lugging the extra weight of a big boot around with me. Off the mark I'd say it was a little slower (due to the weight and the lack of torque ) but once it's up and revving it's more perky. I'd say a 4.27 in a 2door would be a noticeable improvement.

Alex wrote:all 316i tourings have them

All 4 pot tourings have 4.27s if manual, 4.45s if auto.

so only available in small cases?

Yup

GrindCulture wrote:

Alex wrote:all 316i tourings have them

All 4 pot tourings have 4.27s if manual, 4.45s if auto.

i thought the 318i had a 4.10 even the tourings

I have 4.45 in mine as that was what was with the car when I did the conversion and want to get a 4.10 ASAP. To be honest 4.45 is just annoyingly short.