Nice mate cheap that aswell
Announcement
Collapse
No announcement yet.
My project Corsa, AKA Cecil
Collapse
X
-
So its been while since my last update... Basically I got the bottom end mostly built up, was having a tidy up and had a small accident, I dropped the short motor, breaking the corner off the block and bending the crank!
So I stripped the ,luckily, undamaged pistons and rods out and had to find another block and crank and have it machined and re check all the clearances.......
I then came to the next problem, early cranks have two flats that drive the oil pump like this.
Later ones have six flats like this,
The later pump bodies don't have the crank sensor bracket that I need, luckily the pump rotors are interchangeable, however somebody at GM decided to change the oil seal diameter to a different, dumb, size so the pump body was dropped off for machining to take the later seal.
I then built up the bottom end and fitted back in the car before I could damage it.
Then lapped all the valve seats and built the head up with new springs, seats and retainers
and dropped that back on the block
Because the head and block have been skimmed I checked all the valve timing (forgot to take a photo with the dial gauges on) found the exhaust to be spot on but the inlet cam was advanced 4(cam) degrees so I redrilled the gear ten teeth plus 4 degrees retarded, pictured here before I timed everything up
All back together, doesn't look any different to before.
We've been out for a session to bed everything in, no fluid leaks so should be able to start winding the boost up at the weekend
Comment
-
Air guides straight from the tool
Start trimming
Test fit
Bend up some mesh to keep rocks, wildlife, small children out.
Hold it all in place with wire and lollipop sticks whilst the glue sets
And after the adhesive cured.
Last edited by andrewt1971; 17 September 2019, 09:57 PM.
Comment
-
A small update. I needed to do something with the bulkhead closure plate where the gear selector used to go through so.
I removed it from the car and weighed it of course...
Trimmed it back to leave the flange and screwed it to a board
Filled and pattern coated the plate
Flatted and polished
Mould pulled and polished
Layed up and infused
Pulled from the mould
Trimmed and weighed, a 130g saving.
Steel hold down nuts
Replaced with aluminium, another 50g saved
and the plate fitted
Also I have been doing a little mapping but have had to order bigger injectors as I've run out of duty at 1 bar boost at 7200 rpm.
Comment
-
Not much of an update as I haven't been able to do any proper work on the car for three months, mostly because of continuously poor weather, but I did take it out for a little mapping session the other day and tested the launch control on a slightly damp road, all went well until the launch control switched off and then it just spun the wheels.
Comment
-
Another small update, In an attempt to get a wider range of boost control I've decided to ditch the regular BCS and actuator setup for a garrett electro-mechanical actuator usually found on VNT diesel turbos. One of the ideas been that I can force the waste gate open when launching and stop the engine effectively going into anti lag and building boost.
First task was to source an actuator that's PWM controlled and not can bus, turns out a 6nw008412 will do.
So remove the standard parts.
Then make a bracket the mounts the new actuator on the stock mount.
Fit a 2 pin plug on the actuator and earth it locally to the bracket and a ball joint on the actuator arm, this and the above bracket means I can easily swap straight back to 'normal' if I have to
Actuator mounted and aligned with wastegate arm
And a small, extremely dull, video of the wastegate under control of the ECU. Apologies for the quality but its not easy trying operate the camera whilst not burning you arm or melting the camera and changing the ecu map settings on the laptop..
All I need now is for lock down to ease so I can go out and map it, Knowing my luck id' get pulled by the police and I Don't think they will believe its 'neccessary travel'!
Comment
-
For a while now I'd been thinking about moving the engine oil radiator and ducting it and the gearbox oil rad together. The engine oil cooler wasnt causing any issue in front of the water rad and intercooler I was just after better packaging..
So armed with some cheap aluminium I set about it.
The gearbox rad sits directly behind. When I have some time I'll pull the aluminium panels off and replicate them in carbon.
Comment
Comment