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> 1971 Gold Metallic Project, The Turbo 1.7
McMark
post Jul 16 2013, 10:52 PM
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QUOTE(ConeDodger @ Jul 16 2013, 07:45 PM) *

A thing to watch for on tear down with water injection with aluminum heads is leaching of the combustion chamber metal. This used to happen with Datsun heads that were water injected until we discovered we were destroying the heads. (IMG:style_emoticons/default/blink.gif)

Did a little research. Apparently it's not the aluminum itself that corrodes:


for ALUMINUM heads, he said it was bad for NISSAN L-Heads due to their high silicone/copper content. Corvair Aluminum heads do not suffer from it as they are a different alloy than Nissan used, same for VW. Who knows what they used on VG motors? They may be O.K., but L-Motors will turn to cheese if you use it enough, mine did.
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ConeDodger
post Jul 17 2013, 11:50 AM
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QUOTE(McMark @ Jul 16 2013, 08:52 PM) *

QUOTE(ConeDodger @ Jul 16 2013, 07:45 PM) *

A thing to watch for on tear down with water injection with aluminum heads is leaching of the combustion chamber metal. This used to happen with Datsun heads that were water injected until we discovered we were destroying the heads. (IMG:style_emoticons/default/blink.gif)

Did a little research. Apparently it's not the aluminum itself that corrodes:


for ALUMINUM heads, he said it was bad for NISSAN L-Heads due to their high silicone/copper content. Corvair Aluminum heads do not suffer from it as they are a different alloy than Nissan used, same for VW. Who knows what they used on VG motors? They may be O.K., but L-Motors will turn to cheese if you use it enough, mine did.



Yes that's it, it leaches copper out of the alloy and causes pitting in the combustion chambers. Glad it isn't a problem with the VW head. Inject on!

Why should I be surprised that Datsun used an alloy that wasn't quite up to it. They used some SAE fasteners. I just had to go explain that to the body shop putting the front spoiler on when they couldn't figure out why the turn signals didn't use an M5 or an M6. I said "well, did you try a 10/32?" Huh??? (IMG:style_emoticons/default/blink.gif)
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McMark
post Jul 17 2013, 01:04 PM
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(IMG:style_emoticons/default/av-943.gif) 10/32 - 3/8 - 13/64 what a completely idiotic system of measurement. Sorry, side note. (IMG:style_emoticons/default/biggrin.gif)

I noticed something potentially interesting. I updated my MicroSquirt to the latest code/firmware (3.83) and it hasn't pinged since then. (IMG:style_emoticons/default/blink.gif) Could my pinging have been a software problem all along? I added 2 degrees of timing back in under boost. We'll see how that feels when I go for a test drive.
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Chris Pincetich
post Jul 17 2013, 01:15 PM
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OMG is MicroSquirt a Bill Gates product, buggy and tempermental unless constantly re-connected to the mothership for updates?

Great work McMark! BTW my 914 started right up after sanding all (+) battery connections to remove the coastal rust and corrosion. (IMG:style_emoticons/default/beerchug.gif)

Super cool that the turbo is working so well. I was hoping to read that you were going to set it and forget it for 6+ months, drive and abuse it, and keep it as close to simple bolt-onto stock as possible. If you are still planning to add water to your aircooled motor....I can't stop you (IMG:style_emoticons/default/biggrin.gif)

Ifn I can't get my engine lid mounts welded locally I will pay you a visit soon! (IMG:style_emoticons/default/beerchug.gif)
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McMark
post Jul 17 2013, 01:54 PM
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(IMG:style_emoticons/default/smilie_pokal.gif) No pinging on the way to lunch. Addded 2 more degrees on the way back. Got a couple of pings and adjusted those sections. If I have time today, I'm gonna turn up the boost.
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Mike Bellis
post Jul 17 2013, 06:43 PM
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QUOTE(McMark @ Jul 17 2013, 12:54 PM) *

(IMG:style_emoticons/default/smilie_pokal.gif) No pinging on the way to lunch. Addded 2 more degrees on the way back. Got a couple of pings and adjusted those sections. If I have time today, I'm gonna turn up the boost.

Now you can add your water injection and turn up the boost. (IMG:style_emoticons/default/evilgrin.gif)

Get a boost activated switch and add some methanol to the mix...
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McMark
post Jul 17 2013, 06:47 PM
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Turned up the boost, but I think I have a pressure leak somewhere. Either that or turning the screw didn't have as profound of an effect as I expected. Peak pressure was 6.5psi. I could feel it though.

Figured I should post my config file and a log. Let me know anyone can download and open these. I had to configure the board software to allow these types and I'm not sure it worked right.


Attached File(s)
Attached File  2013_07_17_17.01.21.msl ( 2.48mb ) Number of downloads: 41
Attached File  CurrentTune.msq ( 30.33k ) Number of downloads: 34
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FourBlades
post Jul 17 2013, 07:01 PM
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(IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/smile.gif) (IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/smile.gif)

I nominate this thread for the prestigious Thread-Of-The-Month award, which I just made up.

(IMG:style_emoticons/default/smile.gif) (IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/smile.gif) (IMG:style_emoticons/default/biggrin.gif)

Anyone second me?

John
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Mike Bellis
post Jul 17 2013, 07:02 PM
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You should be able to get 25psi out of that K03... (IMG:style_emoticons/default/happy11.gif)
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Mike Bellis
post Jul 17 2013, 07:02 PM
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QUOTE(FourBlades @ Jul 17 2013, 06:01 PM) *

(IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/smile.gif) (IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/smile.gif)

I nominate this thread for the prestigious Thread-Of-The-Month award, which I just made up.

(IMG:style_emoticons/default/smile.gif) (IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/smile.gif) (IMG:style_emoticons/default/biggrin.gif)

Anyone second me?

John

(IMG:style_emoticons/default/agree.gif)

It should be highlighted in pink. (IMG:style_emoticons/default/biggrin.gif)
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Andyrew
post Jul 17 2013, 11:09 PM
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QUOTE(kg6dxn @ Jul 17 2013, 06:02 PM) *

You should be able to get 25psi out of that K03... (IMG:style_emoticons/default/happy11.gif)

^ I've done it

(IMG:style_emoticons/default/happy11.gif)



Watching your water injection solution Mark!!
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SirAndy
post Jul 17 2013, 11:32 PM
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QUOTE(kg6dxn @ Jul 17 2013, 06:02 PM) *
It should be highlighted in pink. (IMG:style_emoticons/default/biggrin.gif)

Lemmy test my new coloring a thread admin page ... BRB ...
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SirAndy
post Jul 17 2013, 11:36 PM
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Mike Bellis
post Jul 17 2013, 11:37 PM
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QUOTE(SirAndy @ Jul 17 2013, 10:36 PM) *

(IMG:style_emoticons/default/first.gif)

(IMG:style_emoticons/default/cheer.gif) (IMG:style_emoticons/default/cheer.gif) (IMG:style_emoticons/default/cheer.gif) (IMG:style_emoticons/default/cheer.gif) (IMG:style_emoticons/default/cheer.gif) (IMG:style_emoticons/default/cheer.gif) (IMG:style_emoticons/default/cheer.gif) (IMG:style_emoticons/default/cheer.gif) (IMG:style_emoticons/default/cheer.gif) (IMG:style_emoticons/default/cheer.gif)
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McMark
post Jul 18 2013, 12:00 AM
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McMark
post Jul 18 2013, 12:01 AM
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oldschool
post Jul 18 2013, 01:04 AM
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QUOTE(kg6dxn @ Jul 17 2013, 06:02 PM) *

You should be able to get 25psi out of that K03... (IMG:style_emoticons/default/happy11.gif)


Or you can use a turbo like this..
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ConeDodger
post Jul 18 2013, 08:00 AM
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Oh No! I think Mark just saw his thread turned pink!


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get off my lawn
post Jul 18 2013, 10:36 AM
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Ya can't do it.
Turbo a 914.
can't be done.

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ConeDodger
post Oct 6 2013, 11:15 PM
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So I got to drive the famous 1.7 Turbo today... (IMG:style_emoticons/default/driving.gif) (IMG:style_emoticons/default/unsure.gif)

First off, it has nice manners. It idles just as you'd like, there is no popping and sputtering. In short, it runs like a stock motor, new from the factory.

It has power something like a 2270. The turbo makes for a pretty quiet exhaust so it doesn't sound racy. It pulls really strong to redline and I didn't hear any pinging...

In short, I'd recommend this motor to anyone who wants stock like mannerism and way more power!
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