E30 Zone

They seem to be coming down in price on the bay - granted i only run a 2.0 m20 and maybe a turbo would be better idea but i like the idea of supercharging it - has anyone thought about going this route?

I think the 4 cyl guys have mentioned the mini as you can buy the complete kits from the Mini owners who have upgraded. Not sure how it would be easily done to the M20, there's a company in Canada that sells a bolt-on M20 kit for $2500 I think.

I made a suggestion of this a month or so back, but those in the know suggested the Eton blower from the cooper S would not flow enough even with a bigger pulley

but those in the know suggested the Eton blower from the cooper S would not flow enough even with a bigger pulley

I'm not trying to sound childish but 2 Etons off a Mini might, if you could fit them under the bonnet.

Andy_magic wrote:

but those in the know suggested the Eton blower from the cooper S would not flow enough even with a bigger pulley

I'm not trying to sound childish but 2 Etons off a Mini might, if you could fit them under the bonnet.

apparently the m45 charger off of the cooper s is good for upto 13000l of air a minute....

this means that on a m20b20 (assuming volumetric efficiency of 85%) you could run it at 2bar to get get a flow of 12894l a min at 7k rpm

on a m20b25 (assuming volumetric efficiency of 85%) you could run it at 1.6bar to get a flow of 12689l at 7k rpm

bot these pressures would produce a good increase in performance IMO

it will also produce a shead load of heat!

lentec wrote:it will also produce a shead load of heat!

t'intercooler (yorkshire approach ) would work wonders-drop the charged air temp a fair bit, assuming it was fitted correctly

you know the ins and outs more than me mate

320Touring wrote:

Andy_magic wrote:

but those in the know suggested the Eton blower from the cooper S would not flow enough even with a bigger pulley

I'm not trying to sound childish but 2 Etons off a Mini might, if you could fit them under the bonnet.

apparently the m45 charger off of the cooper s is good for upto 13000l of air a minute....

this means that on a m20b20 (assuming volumetric efficiency of 85%) you could run it at 2bar to get get a flow of 12894l a min at 7k rpm

on a m20b25 (assuming volumetric efficiency of 85%) you could run it at 1.6bar to get a flow of 12689l at 7k rpm

bot these pressures would produce a good increase in performance IMO

Hmm where'd you get that little nugget of info huh Neil. Wasn't from the other thread was it haha busted.


Liam, there's a few of us who want to do this on our 4pots. you'd proably be better with a bigger eaton for the 2.0 but eaton quote that charger as being good enough for a 2.0 so it really depends how much boost you want. Though I think you be better starting with a 2.5 due to the base economy difference (apparently the 2.5 is almost always as if not more fuel efficient - unless you're name is Neil )

Anyway. Have a look at the thread in Engine Swaps / Forced Induction section at the Supercharge m42 thread. it's pretty long but there's some good info in there.

Incidentally eaton make bigger superchargerS than the minicooper one. iirc, the m65, m90 spec can be found on their website.

E30BeemerLad wrote:I made a suggestion of this a month or so back, but those in the know suggested the Eton blower from the cooper S would not flow enough even with a bigger pulley

Smaller pulley would flow more.

hoshy wrote:
Hmm where'd you get that little nugget of info huh Neil. Wasn't from the other thread was it haha busted.


Liam, there's a few of us who want to do this on our 4pots. you'd proably be better with a bigger eaton for the 2.0 but eaton quote that charger as being good enough for a 2.0 so it really depends how much boost you want. Though I think you be better starting with a 2.5 due to the base economy difference (apparently the 2.5 is almost always as if not more fuel efficient - unless you're name is Neil )

Anyway. Have a look at the thread in Engine Swaps / Forced Induction section at the Supercharge m42 thread. it's pretty long but there's some good info in there.

Incidentally eaton make bigger superchargerS than the minicooper one. iirc, the m65, m90 spec can be found on their website.

lol mate-not quite!! ran up the info on my airflow calc spreadsheet

all good! for instance my lil bro's 1.3 skoda, if fitted with an m45 can take 35psi (circa 4+ bar) at 7k

Cool, did you make that yourself?

email 'er over

hoshy wrote:Cool, did you make that yourself?

email 'er over

tis on its way mr hoshy sir!

getting 2 bar from an eaton M45 would get you more heat than presurized air.

Sirnixalot wrote:getting 2 bar from an eaton M45 would get you more heat than presurized air.

yeah that!!
mine was running proper hot that was only@ 12psi
you prob could get it glowing at 27psi

Neil, post me your spreadsheet too. Ta.

Also looking at a SC, but the mini-charger looked like too much hassle to get right. There are better options out there, supposidly. When I find the right I'll post the details.

the bloke i work with had one , he was going though hatfiled tunnal on th a1and the car in frount of him broke suddenly , so he did and 1 of the abs units on the front failed causeing him to crash in to the wall 3 times , the only thing that was left on the car to reckonise it was the frount wheel. he was lucky just to have broke his shoulder

ouch wrote:the bloke i work with had one , he was going though hatfiled tunnal on th a1and the car in frount of him broke suddenly , so he did and 1 of the abs units on the front failed causeing him to crash in to the wall 3 times , the only thing that was left on the car to reckonise it was the frount wheel. he was lucky just to have broke his shoulder

And this is a result of the supercharger?

anyway, I don't abs

sorry didnt read the topic propley . sorry fellas

garyp_E30_325i wrote:Neil, post me your spreadsheet too. Ta.

Also looking at a SC, but the mini-charger looked like too much hassle to get right. There are better options out there, supposidly. When I find the right I'll post the details.

not a problemo mate-just gimme an email addy and i'll send it when i get to work on thurs!

*no, i dont spend all day on the zone and doing airflow calculations*

*well, not every day*