N13 Turbo - Round 2... Fight!
Posted: Sat Apr 24, 2021 1:54 pm
This will be the build log for an experimental VNT Turbo setup on the N13 pulsar. It is already running the Delco ecu with 12P so it's not a true Delco ECU conversion but hopefully an interesting build all the same.
What we learnt in Round 1:
*Intercooling not required when using Throttle Body Injection on mild boost (6-8psi)
*VNT turbo's can offer full boost just off idle to redline
*VNT's need to be over-sized (or an external wastegate) to keep boost under control up top
*Exhaust wrap is unpleasant to work with.
Things I want to do this time around:
*Tuck the turbo under the manifold, hugging the block to keep the stock fans
*Use heat-shields and not a blanket on the Turbo. They're only oil fed so forced air cooling is a good thing.
*Use common pipe and silicone sizing throughout. For some reason 2"=cheap, 1.75"=unreasonable.
*Add room for a wastegate should I need it.
*Find a junker engine that I truely don't care about to see how much boost a stock motor will handle
Here's some pics!
My 1.6L Time machine. Takes me right back to 2001
This time 'round we're using a 2.0L BorgWarner turbo from a GreatWall 2.0L. In it's original application it makes full boost (26psi) by 1800RPM and holds it until just over 4000RPM where the ECU throttles back fueling. The intake and exhaust housings are bigger than the previous 1.6L turbo in my last build so fingers crossed it breathes a little better and makes less boost with the VNT nozzle fully open. This should work great in my 1.6 and possibly the 1.8L too - though I've got a 2.2L BT50 turbo in mind for the 1.8L. The vacuum actuator is removed ready for an electronic actuator. A 1.8L engine I grabbed from a written-off Pulsar. It took a bit of a hit head inpact on but aside from the exhaust manifold, dizzy, oil return, alternator etc it looks like it might be OK. Acid was on the gearbox for a week and made a bit of a mess of it. Appears to be superficial. There's no sandwich plate between the box and engine on this. Odd... I found this off a Barina I think it was. 2" mouth and feels pretty sturdy and looks like it'll flow better than my homemade hat. It might find its way into this build.
What we learnt in Round 1:
*Intercooling not required when using Throttle Body Injection on mild boost (6-8psi)
*VNT turbo's can offer full boost just off idle to redline
*VNT's need to be over-sized (or an external wastegate) to keep boost under control up top
*Exhaust wrap is unpleasant to work with.
Things I want to do this time around:
*Tuck the turbo under the manifold, hugging the block to keep the stock fans
*Use heat-shields and not a blanket on the Turbo. They're only oil fed so forced air cooling is a good thing.
*Use common pipe and silicone sizing throughout. For some reason 2"=cheap, 1.75"=unreasonable.
*Add room for a wastegate should I need it.
*Find a junker engine that I truely don't care about to see how much boost a stock motor will handle
Here's some pics!
My 1.6L Time machine. Takes me right back to 2001
This time 'round we're using a 2.0L BorgWarner turbo from a GreatWall 2.0L. In it's original application it makes full boost (26psi) by 1800RPM and holds it until just over 4000RPM where the ECU throttles back fueling. The intake and exhaust housings are bigger than the previous 1.6L turbo in my last build so fingers crossed it breathes a little better and makes less boost with the VNT nozzle fully open. This should work great in my 1.6 and possibly the 1.8L too - though I've got a 2.2L BT50 turbo in mind for the 1.8L. The vacuum actuator is removed ready for an electronic actuator. A 1.8L engine I grabbed from a written-off Pulsar. It took a bit of a hit head inpact on but aside from the exhaust manifold, dizzy, oil return, alternator etc it looks like it might be OK. Acid was on the gearbox for a week and made a bit of a mess of it. Appears to be superficial. There's no sandwich plate between the box and engine on this. Odd... I found this off a Barina I think it was. 2" mouth and feels pretty sturdy and looks like it'll flow better than my homemade hat. It might find its way into this build.