Recent Posts

91

MK2 Golf/Jetta and Audi 5k / 1986 Jetta Properly converting from AC to single V belt

« Last post by Sawbones on February 17, 2024, 12:59:12 pm »

I have a 1986 Jetta 1.6 NA diesel. It used to be an AC car. Previous owner stripped everything and it came to me with a waterpump and alternator that didn't line up with the crank pulley. I went through a bunch of nonsense and got everything in line but I'd like to have the proper single belt setup. If I were to walk into a part store I wouldn't be able to say what belt I need for my crank/waterpump/alternator nor would I be able to say what alternator I need. Can I get the parts from a Rabbit diesel or MK2 diesel and bolt it on, off to the races? My alternator is a long shaft motorola but it used to be a Bosch and I don't mind swapping it back if needs be.

What all do I need? I think crank pulley, waterpump pulley, alternator but if there's other things, I'm kind of at a loss.

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mTDI Mechanical TDI Conversions / Re: Thoughts on mTDI AHU head porting

« Last post by RabbitJockey on February 16, 2024, 02:48:23 pm »

hell yeah, please keep us updated on your project

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mTDI Mechanical TDI Conversions / Re: Thoughts on mTDI AHU head porting

« Last post by jhax on February 15, 2024, 07:42:38 am »

I do have an intercooler

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mTDI Mechanical TDI Conversions / Re: Thoughts on mTDI AHU head porting

« Last post by RabbitJockey on February 14, 2024, 09:10:58 am »

you're welcome, and good luck, hopefully you have an intercooler too.

The thing with your setup is if you increase the head flow too much it will out flow the turbo even at only 18psi which will make the turbo overspeed and this will obviously affect reliability.

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mTDI Mechanical TDI Conversions / Re: Thoughts on mTDI AHU head porting

« Last post by jhax on February 14, 2024, 08:52:38 am »

I was afraid of that, I already bought the burrs, oh well. I ended up getting the BRM intake, which, according to TDIClub research, is the one that provides the best air flow. Thanks for the information though!

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mTDI Mechanical TDI Conversions / Re: Thoughts on mTDI AHU head porting

« Last post by RabbitJockey on February 13, 2024, 06:52:00 pm »

there is the swirl bump but there is also another one closer to the valve seat that is there to help prevent cracking from the location of the injector.

If I were you I wouldn't port the head because it's time consuming and the benefits aren't really worth it for 110hp.

if i were going to do it in your scenario I'd focus on just smoothing everything out and not enlarging or changing the shape of anything. only use sand paper cartridges, no burrs. this would hopefully help to gain efficiency with out losing any low speed power. Also definitely get a PD style intake, with the pd intake and very very mild porting it should run cooler and smoother.

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mTDI Mechanical TDI Conversions / Re: Thoughts on mTDI AHU head porting

« Last post by jhax on February 13, 2024, 03:44:38 pm »

Thank you for the replies. As far as HP and torque goals are concerned. I am looking at maybe 110HP out of this. Remember it is going into a vehicle with the aerodynamics of a brick and heavy. I kept the K14 because of it's early spooling throughout the rev range and I plan on not allowing it to go above 18PSI. I understand that I can get much more HP and torque with the LR IP but, once again, heavy brick. I am aware of the swirl bump in the intake ports, which assists with atomization of the fuel and air. My plan is to smooth it a bit, but from my understanding, the more it's reduced, the more the fuel just get dumped into the chamber and less efficient atomizaton, more heat, more black smoke. I also understand that the exhaust ports should remain smaller and it seems like that step from the head to the exhaust manifold allows the hot air to move quicker to the exducer, creating quicker spooling response. So with that information, port matching the exhaust ports may not be the ideal scenario. And smoothing out the intake chambers (opening up the bowls), grinding down the valve stems, and opening up the D ports, plus using some grinding paste on the valve seats and valves seems like the best option. What do we think?

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General / Re: Pretty dismal

« Last post by Dennis Froelich on February 13, 2024, 09:54:44 am »

Wish I had that kind of coin....

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General / Re: Pretty dismal

« Last post by ORCoaster on February 12, 2024, 09:55:12 pm »

Would that be the one that resembles an aircraft hanger?

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General / Re: Pretty dismal

« Last post by Dennis Froelich on February 12, 2024, 11:43:00 am »

The important ones are in my garage...