HOMEWORK
did a little research and consultation with alot of experienced people and some of the most significance one was from uncle Pungky (B.P. Kusumo Bintoro)... as usual, his resourcefulness has amazed me again 
ok so now we start with M20B25
bore 84mm (with 0.2mm off due to heat, need to either bore it to bigger size or resleeve it back to 84mm, i rather bore it up)
stroke 75mm
Piston CH 34.7mm
conrod length: 135mm
now, i could just rebuild it back to normal, but i decided to do upgrade while at it to ease the pain
the weapon of choice is:
Crankshaft and Con Rod
from M52B28
stroke is 84mm
conrod length is the same with M20B25: 135mm
however some modification needed. see the comparison of both crank from M20B25 (left) and M52B28 (right), need to add the extra sleeve in order for the M52B28 crank to sit properly on M20B25 block
and uncle Pungky (B.P. Kusumo Bintoro) is kind enough to provide me with the CAD tech drawing of it for the machine shop
PISTON with the correct Compression Height (CH)
so now the correct piston CH that i need is: 34.7mm - (84-75)/2 = 30.2mm
the 2 closest candidate with bigger bore than 84mm is:
M43B19TU piston with CH 30.4mm Bore 85mm
or
M44B19 piston with CH 30.4mm Bore 85mm
but then my good friend Posma has supply me with M44B19 Oversize 85.5mm Piston, so the bore will be 85.5mm (will be confirmed tomorrow when i see him)
so the final displacement would be: 84 *
and for the head gasket, uncle pungky suggested: E36 M3 S50B30 head gasket as it has 86mm bore, or custom made
that is all so far...
Thursday, December 16, 2010
HOMEWORK
Day 5 at RIVERSIDE
Day 5 at RIVERSIDE
work done by: Riverside. Race/Rally Preparation, Engine rebuild and Competitive Parts. Mr. Loqy Siregar.
http://www.facebook.com/profile.php?id=561148403
head being inspected. based on mr. B.P. Kusumo Bintoro, a resourceful and helpful senior member of BMWCCI, he informed me that up to 0.3mm shaving is allowed. my M20B25 head was put against glass and measured with gaping tools and some area have gap of 0.09mm so i still can shave it
RIP (rusted into pieces) 
close up of one of the valve and head dome
clean clean scrub scrub
the block is cleaned and measure. cylinder 3 and 4 is 'oval' because of the heat... meaning that the diameter is not 84mm all around, there are some 0.2mm differences on the different diameter orientation.
now back to rust... left front subframe today
inside view of the left frame
closer...
the main roll cage loop was made first...
interior in progress...
working on the left front floor panel now
left floor panel made to fit, waiting to be welded on
next target :O
Wing donated from Qui Ngo, and the Sparco Sprint i bought sometime ago... waiting patiently to go in
in front of my BIMMO, there was koko's E30 4 door, converted into 2 doors and pumped guard
comparison of my guard and his guard hahaha
mr Loqy the evil mastermind of this project... muahahaha
and his loyal accomplish
Wednesday, December 15, 2010
Day 4 at RIVERSIDE
Day 4 at RIVERSIDE
work done by: Riverside. Race/Rally Preparation, Engine rebuild and Competitive Parts. Mr. Loqy Siregar.
http://www.facebook.com/profile.php?id=561148403
so far i have been very pleased with the personality and professionalism of mr. Loqy, the humble owner of Riverside. He gave updates and report before i even ask, quick and detailed in his work and replies, also the quality of the craftmanship that his lead welder did was quite amazing.
the dodgy previous owner appearently had rust and instead of fixing it, he decided to hide it by paint or patch a new plate ON TOP of the rusted surface without cleaning it, so the rust kinda grow from inside out.
new floor right hand side (now we can start on left hand side LOL)
new plate over the front chasis
intake plenum being removed, no more octopus humping my engine...
rocker cover opened...
the good news is, i got the '885' head which have highest flow in stock form out of the other 2 M20 head
being cleaned first
bimmo's organs. piston are cooked
Tuesday, December 14, 2010
Day 3 at RIVERSIDE
Day 3 at RIVERSIDE
work done by: Riverside. Race/Rally Preparation, Engine rebuild and Competitive Parts. Mr. Loqy Siregar.
http://www.facebook.com/profile.php?id=561148403
subframe section
inside view of the welded front subframe
this reminded me of the scene on fast & furious, when the green eclipse floor fall out and the laptop yell danger to manifold! hahaha
new floor being made
Monday, December 13, 2010
Day 2 at RIVERSIDE
Day 2 at RIVERSIDE
work done by: Riverside. Race/Rally Preparation, Engine rebuild and Competitive Parts. Mr. Loqy Siregar.
http://www.facebook.com/profile.php?id=561148403
Removing the guards to exposed the front subframe
inspecting more rust area
patch and welded the front sub frame with galvanised metal plate
next area to be cut
