100hp stock M20B20 E30

[barf 0]

the original M20B20 engine lost compression at 290,000km. apparently, cylinder 2 ate something other than a mixture of gasoline and air.

so replaced it with a south african-spec 130,000km M20B20, and a nice new clutch (courtesy of rds)

replaced a leaky sump gasket, add some silicone

blanked off the distributor hole, added wasted spark, a pod filter and a Megasquirt 2.

and this is the result after a street tune and about an hour on the dyno.

the afr is a bit rich (lambda<0.85) over 5400 so there is room for improvement still. using NGK plugs.

[barf 0]

fuel is pump gas, 95RON. coolant temp is modest - 68deg when cruising on a hot day. cruising lambda = 1.00 and WOT lambda = 0.85

using pennzoil 20w-40 and external oil cooler with thermostat

plugs are standard $5 NGK's BP5ES - but need to replace with resistor type to reduce electrical noise.

engine runs quiet and smoothly, even as slow as 350-400rpm - using 700rpm idle. smooth spark retard rev limit at 6800-7200.

[thorburn 121]

Is this your first megasquirt project? Have all ways wanted to have a play with building up a megasquirt and attempting to tune it myself. There'll be a lot more reading needed before I do jump into it.

Any more planned for this car?

[E30BMA 0]

The old notchback Celica in the background brings back memories. I used to own one the same colour and all.

Anyway back on topic... 71kw, is this much more than a standard m20B20??

[Lucan 196]

less than "stock"

Stock was supposedly ~121hp or 92-95kw when new

[Forrest 35]

^ Isn't that 71kw at the wheels though? and the factory figure will be at the fly

[Lucan 196]

Has anyone put a standard 320i on the dyno lately?

EDIT: m20b20 obviously

Edited November 24, 2010 by Blackie

[Guest Simon*]

You could buy a M20B25 for the cost of a dyno run surely!

[_ethrty-Andy_ 2132]

You could buy a M20B25 for the cost of a dyno run surely!

This _b

for as much as being different and doing up a B20 is worth, i would rather the extra power, torque and future potential the extra 500cc would give?

[huff3r 347]

My standard m20b20 pulled 71kw atw on a dyno run I did at tech a few years ago, so no great improvement by the sounds. But so much more potential with megasquirt yeah?