22 replies to this topic

[mini13]

well, god knows how that was managed, a std 1200 head should make that power with no head work and std cams on a 1275 bottom end.... good head and cams and witth that capacity it should make 175+ hp on a good day, or probably evven a bad one.

 

I would like to see full specs, but thats probably not going to happen, cant really see what went wrong as basically you can get allt he bits pretty much off the shelf.... swifty  DCR crank and rods, Schloar/ Specialist comps for the head work, Specialsit comps for the cams...

 

I will say MBE have a good name in rac engine circles and do a lot of good vauxhaul stuff, and have done some 6r4 engines in the past, also i seem to remember them being connected with the RAC mini in the 90's posibly the injection for it, also they did the 8 port injection stuff for minispares. I know Keith calver used to rate them highly.

[MIGLIACARS]

well, god knows how that was managed, a std 1200 head should make that power with no head work and std cams on a 1275 bottom end.... good head and cams and witth that capacity it should make 175+ hp on a good day, or probably evven a bad one.

 

I would like to see full specs, but thats probably not going to happen, cant really see what went wrong as basically you can get allt he bits pretty much off the shelf.... swifty  DCR crank and rods, Schloar/ Specialist comps for the head work, Specialsit comps for the cams...

 

I will say MBE have a good name in rac engine circles and do a lot of good vauxhaul stuff, and have done some 6r4 engines in the past, also i seem to remember them being connected with the RAC mini in the 90's posibly the injection for it, also they did the 8 port injection stuff for minispares. I know Keith calver used to rate them highly.

Who knows!!!!

everyone expected more, Im not sure the outboard injected specified helped it through...

It even went to a new dyno with a different ecu but the power never changed much!!!    

 

 It was 130 at the wheels not the flywheel.

 

In memory and this is now prob 2-3 years ago, after about 2 months trying to start it. it fired.  but there was no oil pressure so switched off and engine out stripped and rebuilt.

 

again not by me...

 

There was oil pressure on the second build..

[MIGLIACARS]

http://www.minispare...ic/CAM6292.aspx

 

 

 

Not the cranks in question, but as ive been surfing the net today found these!!!!!

 

intresting

Edited by MIGLIACARS, 02 June 2017 - 12:28 PM.

[mini13]

yep, theyve been doing them for years, if i went for a stroker that would probably be wwhat i would start with,  but that said a good billet en40 or 4340 crank should take basically anything.

[mini13]

http://www.minispare...92.aspx|Back to

[Sprocket]

Plug order on K100's
Numbered from consecutively front to rear. Number 1 cylinder at front (Cam Chain) end. 4 cylinder at the rear (Clutch).

Firing order 1-3-4-2 (3-1-2 K75)

Front Coil 1 & 4 plug
Rear Coil 2 & 3 plug

Wiring, straight path for plugs 1-3 and plug 4 wiring looped around 3 plug cap.

 

 

Late to the party here, but thats OK if you run the cams the same direction as the original BMW engine, but on the A series engine, the cams are running backwards so the firing order is reversed. Essentially 2431, or when transposed 1243. Wasted spark order is still the same, as thats basicly still 1212 since the standard arrangement crankshaft dictates this.

 

Harmonics on the crank must be different in that there is two power strokes one after the other on the same half of the crank, then the other two power strokes on the other half of the crank. A normal firing order of 1342 shares out these power strokes alternately over the crankshaft.

 

I'd be interested though to find out what harmonic damper was used on this long stroke crank............... If it wasn't a harmonic damper, that might go a ways to explain a crankshaft failure. Maybe

[Dusky]

Plug order on K100's
Numbered from consecutively front to rear. Number 1 cylinder at front (Cam Chain) end. 4 cylinder at the rear (Clutch).

Firing order 1-3-4-2 (3-1-2 K75)

Front Coil 1 & 4 plug
Rear Coil 2 & 3 plug

Wiring, straight path for plugs 1-3 and plug 4 wiring looped around 3 plug cap.

 
 
Late to the party here, but thats OK if you run the cams the same direction as the original BMW engine, but on the A series engine, the cams are running backwards so the firing order is reversed. Essentially 2431, or when transposed 1243. Wasted spark order is still the same, as thats basicly still 1212 since the standard arrangement crankshaft dictates this.
 
Harmonics on the crank must be different in that there is two power strokes one after the other on the same half of the crank, then the other two power strokes on the other half of the crank. A normal firing order of 1342 shares out these power strokes alternately over the crankshaft.
 
I'd be interested though to find out what harmonic damper was used on this long stroke crank............... If it wasn't a harmonic damper, that might go a ways to explain a crankshaft failure. Maybe

1342 doesn't share the power strokes evenly over the crankshaft.
1342 =21-34

Little difference over 1243

[MIGLIACARS]

sprocket    

 

this really throws more light on the whole situation.   as the whole build was dramatic!!!!!!!  expensive and explosive   

 

Ill add more of the real events when im sober been on  it all day and not in a state to start typing long posts...