ToMitz' 1981 Mitsubishi Sigma

[ToMitz]

Hi Guys,

 

I have already started a discussion thread with information on what i'm planning so I decided to get this one started so I can throw up some pictures of the vehicle and the progress.

[ToMitz]

//oldschool.co.nz/index.php?/topic/49522-tomitz-1981-mitsubishi-sigma-build-ideas/

[ToMitz]

Here is a few pics of the car. Sorry they are not very good. I lost all the older ones i had so these are just from the other day when we removed the engine.

[ToMitz]

Stock engine bay

[ToMitz]

Engine getting pulled apart and head ready for removal.

[ToMitz]

Block being removed. Big thanks to Richard for lending a hand and an engine crane.

[ToMitz]

Head Striped and Cleaned + Block Striped and Cleaned. Ready for the fun to begin

[ToMitz]

These bad boys just showed up all the way from Germany. In really good condition for the $$. So long to the terrible stock manifold. 

[ToMitz]

Here is a comparison of the stock intake valve lift vs the lift that will be made with the new cam I have designed. Hopefully start welding and grinding this cam soon.  

Tom's intake comparrison.bmp

[ToMitz]

Have mostly been ordering parts and waiting for them to arrive recently. New pistons and valves on the way. Picked up new gasket set and rod and main bearings. sent cylinder head away to have combustion chamber welded up as current combustion chamber is in need of some loving. 

[ToMitz]

Decided to polish up the inside of my block while waiting for parts. Promoting oil return to the sump never hurts.

[ToMitz]

Picked up the cylinder head from Royce Clive Engineering this morning, Big ups to the guy there for the great job they have done. Here is a comparison of combustion chambers before and after. Have filled in the weird little channel in front of the spark plug and built up the wall as much as possible to help with quench as well as increase compression. 

[ToMitz]

A shot of the complete, welded cylinder head. Will hopefully get on to machining back the welds tonight. 

[ToMitz]

Sent Block, crank, pistons and rods to machine shop today to be Bored, ground and fitted together ready for the block to be decked. Spent the evening lightening the flywheel.  

[ToMitz]

Here is the finished result. Down from 9.8 kg to 6 kg. 

[ToMitz]

Created a master and ground the camshaft on Saturday. Here is the finished result.  

[ToMitz]

Quick update, nothing photo worthy though sorry. Have been busy porting the head, it is currently ready to be bogged up. Have sorted out new springs, titanium retainers, machined spring seats and have got most of the fuel delivery system assembled. Purchased new clutch which has been sent along with flywheel to the machinist for balancing. Should hopefully have most of the engine, except for intake runners, ready for mock up by the end of next week. 

[ToMitz]

Picked the block up today. Cylinders re-bored +0.5mm, Deck skimmed, pistons machined and everything balanced, cleaned up and assembled.  Could not be happier with the Job completed by Glen at Glen Durie Engine re conditioners in Woolston. 

[ToMitz]

Also had crank reground and new oversize main and rod bearings fitted. Block is basically all brand new now except better. 

[ToMitz]

Here is a quick update showing the new inlet port design (lots of bog!!) and the new combustion chamber shape (Ready to make around 12:1 compression after the head receives its skim).