Advice needed on m10B18 turbo conversion

[bavarian47]

Hey guys, I need some advice, I have turbocharged my M10B18 about 2 months ago and blew head gasket. I done motor over again and planning to run with a bigger turbo but this time with a spacer gasket spacing the cyl.head from the block (deckplate) keep in mind that I'm using stock ecu, I want to use stock ECU for now till I get money for a management, my question is. Will the car start with lowered compression on stock ecu? Please guys help and advice will really be appreciated

 

[Rooi_Willie]

I'm no techy, but probably not... Get in touch with Burgy on the forum (ProjectShift) or Xcede Performance. They should be able to give you an educated answer.

And I would seriously suggest you get management ASAP :thumbs:

 

[hennie]

even if you lower the compression you still going to blow head gasket on the standard ecu
go management asap

 

[Gizmo]

Yes the car will start on lowered compression, the motor will swing easier on start-up. Please don't use a spacer gasket as its a cheap and half arse way of reducing the compression of a motor. Rather shorten the rods or deck the pistons if on a tight budget, if finance allows then buy forged low compression pistons and never worry about it again...

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even if you lower the compression you still going to blow head gasket on the standard ecu
go management asap

...care to explain how you came up with that idea?

 

[phantom]

BMW's are all relatively high compression motors.With 95 octane you can rarely get more than 0,3 bar boost before detonation.Head gaskets on most occasions blow due to detonation caused by insufficient fuel octane or not enough fuel.
Putting in a spacer will advance your cam timing and negate most of the compression gain.
Once you start the turbo trail one of the most important rules is to get higher octane fuel. Add ten percent ethanol to 95 and you already have 98 octane. This will allow you to boost 0.6 bar but your injectors are too small for that boost so you will have to add extra fuel.
With limited budget you can buy a pressure switch that activates from 0.1 bar to 1.1 bar and set it to activate at 0.2 bar. A 160cc injector will take you to the fuelling required for 0.6 bar.
If you are cosidering more boost than this there is no alternative to getting forged low compression pistons. (Wiseco for instance).
You do not say which turbo you have or are what is next. On higher compression it is best to get a turbo with a bigger exhaust housing as you get less heat in the combustion chamber that can also destroy a motor.
Yes the motor will start.

 

[328ii]

8?>

 

[racing snake]

i wouldnt boost a car without fitting management as you cannot retard the timing enough and it will detonate which will cause more damage in the long run. rather gather all the parts then build the whole car in 1 go, properly.

the std management system has no method of measuring the manifold pressures and therefore the fuelling will need to be set from the tps and thats not advisable as the setting will only be accurate when the temperature and humidity are exactly the same as the day you tuned the car.

rather build it properly... the cheapest turbo mods cost the most...:thumbs:

 

[bavarian47]

Thanks a lot for the help guys. Every bit counts

 

[GPGrobler]

www.e30clubsa.co.za