Hi Mike;
I don't have vag com. I have another type of scan tool. I wish I would
have found the TDi club website before I bought it. I was thinking about
larger injectors. Apparently that route is better than changing the
chip because it allows the ECU to remain stock injection timing which is
best for emissions. Widening the injection pulse will add more fuel but
affects timing and hence emissions whereas larger bore nozzles just
admit more fuel in the same time as the stock ones.
However....According to my friend who pioneered methanol injection years
ago with performance diesels in tractor pulling, he says if I add
methanol I won't even think about doing the injectors or chip or
anything else. Methanol should allow 25 to 30% more power and will not
detonate even under extreme compression unlike propane injection so it
is much safer for the engine and is much simpler and less costly to
implemement. I'm taking photos and I'll document the journey so others
can follow along if they choose. I have the wimpy clutch too but the
car has 240,000 kms on and I'll be replacing the clutch one day soon so
I'll put the VR6 clutch on - this is apparently a plug and play upgrade
for the TDi.
Joe
Mike Weaver wrote:
That's pretty cool. I chipped mine and swapped to a K&N filter. I
bought bigger injectors but haven't installed yet - I have the wimpy clutch
and it's already putting out plenty of power.
Have you fiddled with VAG-COM yet?
Well worth the price for tuning the motor.
-Mike
Joe Street wrote:
So I've collected most of the bits to try adding methanol injection to
my Golf TDi. I've bored a hole in the manifold and added an injection
nozzle. First I've got to insttal a boost gauge to keep an eye on boost
pressure, but the nozzle I got has two ports so one of them will serve
for a boost gauge. I also picked up a GM fuel pump which I plan to drop
into the windshield washer tank which will be my methanol/water
reservoir. I still have a few parts to pick up. Some kind of small
inline filter. A check valve needs to go in the delivery line to stop
the boost air from bubbling back through the tank when the pump is not
running, and I need an adjustable pressure switch to sense boost
pressure at the point I wish for the methanol to come on. This switch
will be series connected with a floor mounted push switch which will sit
under the accelerator pedal and an arming switch on the dash to disable
the whole system when desired, like when the washer tank runs low.
Sweet that the car has a low level indication light for washer fluid. I
am even considering having a second pressure switch set for a higher
boost pressure which could short out some diodes in the circuit that
normally would lower the voltage applied to the pump motor. Then when
the higher boost level is reached the pump would speed up and deliver a
suitably higher methanol flow to the intake manifold. I have a needle
valve for the delivery line and I plan to adjust it and the pump
voltage(s) by trial and error. Normally the methanol will not come on,
and the car will be just as always, but when I need to pass or
accelerate quickly it will be available if I push the pedal all the
way. This way also methanol can not come on when I don't want it in
between shifts for example or when RPM's are too low and there is
insufficient boost to warrant more fuel. I'm not sure how the ECU is
going to react to all this. For sure the intake air is going to be very
cold after vaporizing a bunch of methanol and this is all downstream of
the air flow sensor so the ECU doesn't know about it, but then on the
other hand if the air densifies then the compressor should unload and
just make up the slack so the airflow sensor should still sense more
flow right? Right?
I hope to get rolling with it in the next few days so I'll keep you
posted on what I learn.(pun) Sure will be sweet to be using some of the
waste stream from the BD process finally! :)
Joe
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