E30 Zone

Hi all, I'm thinking of fitting an m20 turbo in my car, I've got an engine lined up, fully forged 2.5 with 2.7 stroker kit and modified head, it comes with turbo and manifold not eBay one (not sure what turbo it is but the it's all speced to run 700+) and has uprated clutch, basically the main engine is sorted as is intercooler and pipe work.

I'm looking for around 400-500 bhp with room to improve at a later date.

What I'm not sure on is, what injector size I need, I'm thinking 700cc but have been told I can get away with 500cc, can I use skyline ones, as I understand BMW injectors are top feed? and engine management, this bit I have nooo idea on at all, mechanical yes, electrical no lol, I've got a mate who can wire it for me but I haven't a clue what I might need or what you get in a kit/loom, can I use the original sensors, do I need to fit extra sensors, does it replace original loom or just splice in as an ecu replacement and which is the best one to use and price?

Also the capability of the e30 drivetrain it currently has the original sport 260 getrag box and LSD (can't remember the ratio) what sort of power do these take before they destroy themselves?

Anything else I might need to know would be much appreciated.

This has become pretty much a money no object build a˜ž but the cheaper the better, obviously a˜ƒ

500 out of an m20 is no easy task. Ask ross2009 about it. An m50 would be a better choice IMO.

I'll calculate what injector size you need when I get home. Megasquirt and VEMS both offer plug and play ecu's for motronic 55 pin.

Box will be ok, for a while anyway. Zf units from an e36 can handle more though. I would sell your sport box and buy a zf. Diff will depend on how you drive it. Drive shafts are the weak point on an e30 but I would want to install a twin ear diff cover from an e36 as you will eventually rip the diff out.

Before contemplating that kind of power, I assume you have upgraded the brakes and chassis to handle it? e30 brakes aren't the best with a standard m20, let alone over 2 and a half times the power

Brakes are uprated to 335mm disc 4 pot calipers, she's on bilstein coilovers with adjustable top mounts and poly bushed all round and basically fully rebuilt I've replaced pretty much everything for new which is how it's come to cost so much but I wanted it perfect. I understand it's not an easy task that's just what I've kind of set my aim at, id be happy to start lower and work my way up as I get a better understanding of it all, I just wanted to make sure I understand enough before I bite the bullet. What's the 324td box like strength wise and how do you get round the twin eared diff mounting, just weld another mount to the body or is there a more technical way?

Thanks for the help

Because of the gnarly donk in the 324, they only used a Getrag 240, weaker than the 260 used by 325's and sports.

Pretty much just fabricate and weld another hanger on. You also need to swap the speedo trigger wheel out for an e36 item as it is smaller. The speedo sensor will hit it if you don't.

Spend some time on Bimmerforums in the forced induction, a lot of useful knowledge in there, although it's mainly e36 and m5x based

For injectors, 650cc will be ideal and give you a bit of headroom. 500cc's will max out around 415hp.

That's great thank you for help, lots more bed time reading ahead lol

does anyone know if these will fit

http://www.ebay.co.uk/itm/Denso-650cc-t ... 25939aa58d

60lbs injectors Should do pending the size of your turbo, Management wise you can get a plug play VEMS ecu which Gunni on here does, or a plug play
Megasquirt ECU.(USA best place to look IMHO)

Extra sensors and other things should be need which are-
Wideband sensor(lambda)
Boost pressure sensor
IAT sensor
Wasted spark coil pack (either MSD or a vauxhall omega 3.0v6, the one I'm using)
Gauges (oil pressure and wideband a must)
Boost pressure solenoid
Map sensor(normally built in with VEMS ecu not sure on megasquirt)
Colder spark plugs
Performance ignition leads
Higher flow fuel pump(Walbro or Bosch 215lph I think)
Wastegate
BOV

The above items IMHO is what is needed the minimum.

If you can get in contact with Gunni on here he can give you ample of advise. He done a group buy some time last year on a VEMS ecu(check the group buy section) and for a extra charge, if you supply your loom to him he can wire it up as a plug play. He will provide a base map which will get the car running . But it will need further tuning.

I myself have gone with VEMS ecu

cool, gunni's gstuning correct? i was going to email them later.

manifold is fitted with a 38mm tial wastegate and comes with a 50mm BOV.

For a fuel pump i was going to go with walbro 255 in front the original in tank pump.

if using wasted spark that eliminates the dizzy on the front correct?

apparently the turbo is a PTE PT6262 CEA, 62mm inducer compressor wheel.

Have a look here for the VEMS PnP:

https://shop.vems.hu/catalog/vems-motronic55-p-122.html

And here for the PnP megasquirt:

http://www.megasquirtpnp.com/docs/mspnp ... ?isModel=1

And yes, you can remove the dizzy if you go wasted spark. Both PnP's I posted can use the standard dizzy system, but I would probably want to change to wasted spark

or get a megasquirt 3 with the ms3x card or ms3pro as opposed to the pnp, you can have full sequential fuel and spark if you add a cam sensor, antilag, boost by gear and a lot more if you connect up the vss signal and so much more.

have a read here http://www.msextra.com/feature-xref.html

if running a MAP sensor does that eliminate the MAF?

if running an after market ecu like vems / megasquirt this will allow you to use speed density for fueling so can use a map sensor but will need to add an air temp sensor as well, but you can then do away with the afm.

Dan_556 wrote:if running a MAP sensor does that eliminate the MAF?

Yes

majority of the aftermarket ecu come with a built in MAP sensor in the ECU. Just need to run a vacuum hose from the ECU to the manifold.

Thanks for all the help

if I do it I think I might go with the MS3-Pro, seems a good price considering all the features and also I have a friend who has worked with it before

another thing, is it better to run 6 individual coil packs, one six bank coil pack or does it not really make any difference?

Individual coils will most likely provide a better(stronger spark). If you are referring the six bank coil pack as a wasted spark one, then you will save some money and space

All in all I don't think there's much of a difference

yeh sorry should have been more specific lol, I do intend on running wasted spark ignition, on an MS dealer site they also do coil packs, thought i just as well get it all from one place, they do individual or six tower (not bank) wasnt sure which would be best, but ive just checked again and one single coil pack is pretty much the same price as a six tower one , think i might just go with a six lol

its more common to find smart coils with built in ignition transistors in individual coils form so that would mean you could drive them directly from the ecu (5v logic level trigger) so would be no need for an external ignition module. with megasquirt 3 you can wire 6 individual coils but fire them in pairs (wasted cop)

if you wanted a wasted spark coil pack iv got a ford mondeo one i was using with silicone plug leads to suit a m20, but you would need an ignition amp to run it from a ms3, eg a quad spark box