Does anyone know where to get info on supercharging an M20?

[Finny]

I have been considering supercharging my E30 325 tourer now for some time but cant seem to find much information regarding the subject.

There is plenty of stuff out there regarding turbos but very little to do with superchargers.

Any help on this subject would be greatly appriciated.

Regards

Mark

[gepetto]

me to!!! would love to find out more info and prices if available. anyone know??? or already have supercharged e30???

[dips346]

hi i am in the middle of doing one will try and get some photos up soon

[Finny]

are u using a pre made kit or are u doing a DIY job? i was planning on using a polo g40 or g60 chargerthen altering the level of boost with different sized pulleys.

What do you do bout air flow meter? and fueling?

Cheers

[Ant]

Talk to Lentec guys, hes built his own S/charger setup using a Mercedes unit and custom pulleys etc.

To get the best of course opt for a standalone ECU setup the motronic cant "see" boost and thats not good news....

[stevetigger]

are u using a pre made kit or are u doing a DIY job? i was planning on using a polo g40 or g60 chargerthen altering the level of boost with different sized pulleys.

What do you do bout air flow meter? and fueling?

Cheers

Surely a polo one wouldn't be powerful enough!

[lentec]

Have a look at my site! Hasnt been updated in a while but most of it is there http://www.lentec.co.uk look in phase 2

[stevetigger]

or www.lentec.co.uk might work better

[chu346]

Hey lentec, what's the c/r on your engine?

[Patm3]

I am in the process once the car comes back of adding a supercharger to my E34 M5 engine, its a Bolt on and runs with a pulley, and there is all different types, the whole thing has set me back £1000, but its worth it, i used a company that a mate has recommended from Sweden and tried. After doing my Rolling Road and getting 310.5BHP, the super charger i have got, still packaged should kick out an extra 100BHP at 14psi and 140BHP at 22psi giving me something around the 450BHP mark. the company is called Lysholm in sweden. check out
www.v-performance.com and then have a look at www.maddoggsyndicate.com (site is still being designed) which is my mates site, and my car will be going on there soon (once its back and the conversion is done). one has a POLO G40 pushing 200BHP and the other a VW Golf Mk 2 G60/16v 4 x 4 that when its finished it will be pushing 400BHP+ if you want more info or live near to south london i could show you both cars or just contact them via there website, they will be fitting the supercharger for me so hopefully if no one has finished theres by then i will post some pictures.

[lentec]

Hey lentec, what's the c/r on your engine?

LOW! 8.5:1 i think.
Stock 88 2.7eta loads of room for more boost

Cheers steve thats what i ment

[chu346]

I though that the Eta engines were 10.2:1 and 9.8:1 c/r?

[Ant]

you still tempted to go FI then Chu ?

[chu346]

Yeah, definately considering it.

Would it be possible to use a variable geometry turbo from a 330d?

[lentec]

I though that the Eta engines were 10.2:1 and 9.8:1 c/r?

it says 9.0:1 8.5:1 on this site?
http://www.e30eta.com/specs.htm

[chu346]

Dunno where I got my figures from then, I thought I read it on the zone

Isn't the 8.5:1 engine the super Eta which we didn't get overhere?

What I want to determin is if my engine is the same c/r as yours, so I can boost my engine too

[lentec]

IMO if you can supply enough fuel & spark you can boost anything! within reason obviously

What setup are you running?

[chu346]

I'm running an Eta block, 731 head with 325i valves, dbilas 282/272 cam, BBTB and all the other parts are from a 325i like injectors etc.

I'm not too sure what age the block is, but it isn't the one with the core plug behind the flywheel IIRC.

[DaveD]

try this site

http://forums.bimmerforums.com/forum/fo ... .php?f=150

[Turbo-Brown]

IMO if you can supply enough fuel & spark you can boost anything! within reason obviously

dbilas 282/272 cam

except that

Hairy cams don't really lend themselves to forced induction unless you're building something to go racing with

[JazzMan]

the company is called Lysholm in sweden.

These guys? http://www.lysholm.se/

[lentec]

IMO if you can supply enough fuel & spark you can boost anything! within reason obviously

dbilas 282/272 cam

except that

Hairy cams don't really lend themselves to forced induction unless you're building something to go racing with

Not even if the c/r is low enough?

[WillG]

yes they do its back pressure you have to worry about I belive, catcams do custom cams so you can get a 280/270 cam with less overlap then their normal NA cams, they are doing a 272/272 114 degree centreline cam for me at the moment.

Ixer said that your ok with a NA spec cam if you dont have backpressure atall which will be 3" straight exhaust, tubular manifold and 18 cm turbine housing +, I think it is the more backpressure you have the less overlap you can have, you can work it out if you look at PFF's normal cam specs then their turbo cam specs.

[Turbo-Brown]

Not really sure what you mean about back pressure?

Problem with having lots of overlap is that the pressurised inlet charge blows straight through the engine taking all the fuel with it

[WillG]

Yeah I have no idea tbh, I ask Ixer like normal and he said with a big turbo and exhaust its ok to run a cam

In the case of this catcams 282 cam it's 110 degrees which is not very tight at all for a turbo car, in my experience. It's all about the pressure differential that the head will see, a positive drive pressure (more boost than exhast back pressure) is always good for cylinder filling. If you use a small turbine that will spool very quick you will get significant exhaust back pressure at full boost which will cause trouble with charge air contamination which leads to detonation/pinging.

People aren't wrong about worrying about too much valve overlap with turbo engines, it's just that the majority of stock turbo cars use very restrictive turbines to spool quickly. You can use what most consider very aggressive N/A cams on a turbo engine if you use the right turbo and manifold for the job!!

I told QEP how much boost I will be running and what im using car for and they spoke to catcams and they said that the the 282 will probly be to hot for road use even with 114 degree centreline and suggested I have 272 with 114 degree centreline.

[racecar]

hi lennie

if you are reading this thread can you drop me a pm or email "ross AT racecar.com" with your number - want to arrange to pop over and see what bits i can buy off you for quick install - and prevent the m90 gathering dust in davids garage

ms is installed and i am itching for boost - need to get it done ASAP

cheers ross - have sent pm aswell - so ignore if you see this

[e30_Turbo]

Ixer said that your ok with a NA spec cam if you dont have backpressure at all which will be 3" straight exhaust, tubular manifold and 18 cm turbine housing.....

hmmmmmm, thats food for thought.....with my 2x 1&7/8 exhaust, tubular manifold and 18cm2 housing!! Bring it on!!

[WillG]

Ixer said that your ok with a NA spec cam if you dont have backpressure at all which will be 3" straight exhaust, tubular manifold and 18 cm turbine housing.....

hmmmmmm, thats food for thought.....with my 2x 1&7/8 exhaust, tubular manifold and 18cm2 housing!! Bring it on!!

, yeah my cam im getting is for 1.5bar boost, should have it back with welded head next week