ALH Turbo Delete: Daily Driving a Naturally Aspirated 2001 Golf

samedi 15 juillet 2017

"Don't worry, this is only temporary...

...unless it works." - Red Green.


I blew my turbo and I decided not to replace it right away. Instead, I wanted to try natural aspiration:

All of the hard work is already done, I have:

- Removed most of the intake pipes, broken turbo pieces, intake manifold and exhaust manifold.

- Removed the oil feed line to turbo and replaced the banjo bolt with a shortened regular M12x1.5 bolt and one copper washer to seal the outlet at the oil cooler:





- Removed the VNT vanes and their backing plate from inside of turbine housing to allow free exhaust flow:



- Remove turbine shaft and replace with a lower control arm bolt, nut and an aluminum crush washer





- Reinstalled the center cartridge into the turbine housing and made a block off plate for the oil return flange on the bottom of the turbo:



- Reinstalled the exhaust manifold with block of plate between it and the oil return line.

- Finally, I reinstalled the intake manifold and connected it directly to MAF housing using a piece of shop vacuum hose:



I'd guess I have about 30 hp available now and the check engine light is on for boost control. I have Bosio Sprint 520 injectors and a RC3 tune. Zero to sixty takes 30 to 40 seconds, but I can putter around town no problem. Also, once up to speed on the highway, it is easy to forget there is a problem. Some torque seems to be available between 1500 and 2000 rpm but above that there is little to no power.

I will have to get some larger intake tubing: right now I am using 1" inside diameter shop vac hose and I just realized that if I upgrade to something closer to the 2" diameter of the race pipe, the cross sectional area would be almost five times larger!

Will post updates.


ALH Turbo Delete: Daily Driving a Naturally Aspirated 2001 Golf

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