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Inline 5cyl Petrol engine tech / Re: 2.5L Tune Up Advice

« on: July 20, 2016, 09:08:09 pm »

No need to remove fans. Detach front grille/radiater/fan assembly by removing 4 fasters at top of core support. Two per side.  Grab center handle lift firmly up and forward. This will allow acess to the spark plugs, wires etc. 

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Inline 5cyl Petrol engine tech / Re: Turbo!!

« on: December 09, 2015, 08:48:05 pm »

Justin, thanks for the info about the EGT's.  I agree with Cole that gas turbos don't seem to see this as diesels do.  Perhaps with the slower combustion of diesel  as some of the fuel continues to burn past the exhaust valve as it is pushed down to the turbo.  However, with the 5cyl issue with cracking manifolds, the EGT's are still important.  The way to find out is to do it.  I'll be adding a vacuum/boost, EGT, and fuel mixture gauges.  I have oil temp, oil pressure, and coolant temp gauges too but that may make it look too much like a cockpit?

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Inline 5cyl Petrol engine tech / Re: Turbo!!

« on: December 04, 2015, 10:22:54 am »

Great point on the EGT's.  What temps range do you like to see?  Measured before or after turbo?   I agree a long pull under boost at higher rpm's could see a spike.  I figured the horsepower goals I was looking for would come at a lower RPM point compared to the 1.8t motor and that's fine as the 2.5 isn't really a revver in the Eurovan.   

 

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Inline 5cyl Petrol engine tech / Re: Turbo!!

« on: November 30, 2015, 09:46:08 pm »

As far as digifant reprogramming I'm planning to go another route.  I'll be adding a couple of additional injectors for fuel and likely adding 92 octane fuel for detention prevention.  The turbo will be a hybrid of a Passat compressor (in line engine) and a Jetta turbine (transverse engine).  These small k03 turbos are rated for 180hp at stock boost levels which should be just fine in a currently underpowered 93' weekender.  I'm looking forward to the boost in torque and the less frequent downshifts.  In theory I could see a slight uptick in MPG if I can keep my foot out of it and minimize the time in boost.  The factory air box will be replaced by a intercooler from a Jetta.  A cone style air filter will easily fit on the drivers side behind the headlight. 

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Inline 5cyl Petrol engine tech / Re: Turbo!!

« on: November 06, 2015, 09:29:02 pm »

I am considering turbocharging my '93 weekender.  However, I think 150-200hp is a better goal.  I completely understand where Cole is coming from as I made a road trip this last summer which included several Rocky Mountain passes. We made it atop Pikes Peak with calculated 65hp at that altutide.  A normally aspirated 24v would be down to about 120hp from its peak hp.  I've accumulated most of the hardware from other turbo VW's.  How many others out there are interested?