'Eric Wiklunds Volvo 142 Turbo'
This car shares a lot with Jonas car: MembersPage/MattiasSandgren/VolvoBtwenty
Basically the same engine configuration, only this one is turbo-charged.
- Stock B20 block
- 8-bolt crank
- forged KS pistons
- F cam (300 degree duration, 111 degree lobe separation, 11 mm valve lift)
- head ported by Jens Gustavsson
- 3K K27 turbo (51 in/65 out)
- home made turbo adapter to stock N/A manifold
- home made wastegate
- home made intercooler (from a large diesel truck)
- MSD/Holley fuel injectors 895 cc/min @ 3 bar
News
2007-07-31
None of the MCP3208 analog inputs work, this explains the problems with the EGT inputs. The chip seems to have +5V and ground, but MegaTune reports randomly flickering values between 0 and 5.0 Volts in the datalogs.
The chip has probably been damaged about two years ago when we first installed everything, the harness was then redone because it was only used to control ignition and datalogging. I don't think there is reason to suspect anything wrong in the harness at this point.
How do I confirm that there is a problem with the MCP3208 chip?
It could be the AVR, as the only chip that talks over SPI is the MCP3208. I feel it's easier to just replace the chip and try it out on the desk.
2006-10-23
The engine now has a rebuilt bottom-end and there must have been an incredible amount of blow-by on the old bottom-end because VE increased almost 20% at higher loads, with no other changes. The turbo is much more responsive too.
The injectors have been wired in series with a 6.8 Ohm 50W resistor for each injector and a transient protection diode (Zener) has been added to the flyback wire. The total opening time has increased for a given effective pulse width but the accuracy seems to have increased due to more effective flyback control.
There is still problems with EGT readings, I will look into that very soon as the car will go on to a dyno in a few weeks and then put into storage for the winter.
2006-06-11
The car ran 12.34 sec @ 174 km/h at the "local" dragstrip in PiteƄ, north of Sweden. A very nice result for such a simple setup. 110 kPa boost and very little tuning. [Movie here]
Genboard specific configuration
This is a v3.2 with production number 126.
Both triggers are configured for Hall.
MCP3208 channels 5,6 and 7 are wired to EC18 pins 6, 12 and 16.
EGT - only EGT #2 is wired in (MCP3208-4 ?), see page about EGT trouble: MembersPage/MattiasSandgren/EricsVolvoTurbo/EGT
Using power flyback for the injectors with a 30V transient suppression diode.