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> 1971 Gold Metallic Project, The Turbo 1.7
McMark
post Jan 19 2015, 11:00 PM
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Drove it home tonight but didn't find the magic boost. (IMG:style_emoticons/default/sad.gif) time to look at waste gate control. I know from my undercar video that the waste gate is opening quickly.
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edwin
post Jan 20 2015, 02:35 AM
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Easy way to check how quickly and what levels are possible is to quickly pull the wastegate line off. What are you doing for a boost controller? I assume a Mac style solenoid and pwm from the microsquirt?
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McMark
post Jan 21 2015, 12:55 AM
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Right now it's just the built in waste gate. This is a Chinese knockoff KKK so I expect the wastegate is the weak point. Looking at the turbo smart adjustable controller (bleed off style). But I just realized maybe I should install the real KKK turbo I got from Mike. (IMG:style_emoticons/default/idea.gif)
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edwin
post Jan 21 2015, 02:04 AM
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The wastegate settings on the turbos would be the same I expect.
Turbosmart bleed valve is an easy fix or if you have a spare pwm channel on the microsquirt then use that and a boost solenoid for the best control.
Do yourself a favour and just unplug the wastegate and plug the boost line. Go for a drive and watch the boost. Just remember the only think limiting the boost will be your foot.
Only do this for testing.
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Mueller
post Jan 21 2015, 12:25 PM
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Mark,

What you do differently if you had to start from scratch?

The '73 I am getting that has the bad motor supposedly has a Kerry Hunter header on it...hmmmm, and it already has a megasquirt on it....
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McMark
post Jan 21 2015, 11:28 PM
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I don't think I would do anything differently. It's been great for a long time now, and I enjoy it every time I get in. It's a long slow learning process, but so far the minor changes I have made here and there haven't made much difference. So there haven't been any big mistakes to correct. (IMG:style_emoticons/default/wink.gif)
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falcor75
post Mar 4 2015, 12:58 AM
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Loved reading thru your thread, can you post some pictures of your coil setup?
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McMark
post May 24 2015, 08:15 PM
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Installed the high amp alternator today. Laughably, I did that whole upgrade mostly because I was seeing a lot a variation in battery voltage (via the MicroSquirt logs). But the alternator wasn't the problem. Tried a different battery. That wasn't the problem either. Started checking the relay board, pulled and reinstalled the fuel injection connector, and all went back to normal. So I did all this work and it was just a corroded connector after all. (IMG:style_emoticons/default/laugh.gif)

I also resealed my exhaust.... Hallelujah! Btw, I never 'got' the tip about annealing the copper exhaust gaskets, until this time. Holy crap, I should have listened to everyone a LONG time ago. So much nicer. So much quieter.
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rick 918-S
post May 24 2015, 10:27 PM
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Hey nice rack! -Celette
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Can't blame you for doing the upgrade. I have similar symptoms showing on the factory gauge. Very annoying. Glad you found the real issue.
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Aircooledfool
post May 25 2015, 05:41 PM
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This may have been asked already, do you plan to offer this type of setup to the public?
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McMark
post May 25 2015, 06:47 PM
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Never as a loose collection of 'bolt on' parts. I'd be happy to build a setup for someone, but it would be build-to-order and also dependent on the rest of my work load. You have to get the fuel injection and that's around $3k, the turbo and exhaust fab work would be another $2000-2500. If anyone is interested, they can PM me.

Just realized maybe you're talking about the alternator setup. Same caveat, but the price is more reasonable. (IMG:style_emoticons/default/biggrin.gif) The alternator itself is in the $300 range, plus shop rate for making the modifications to the unit, which would be in the $200 range.
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ConeDodger
post May 25 2015, 07:37 PM
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Mark,
As far as the turbo is concerned, I think you've proven the concept. Let's build a new engine and bolt on the turbo. That way you can customize the cam grind, get heads that work really well with boost...
I can come down for build days! (IMG:style_emoticons/default/rolleyes.gif)
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nine9three
post May 26 2015, 04:09 PM
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I've enjoyed reading this thread. Seems to me that a well designed turbo system would find a home among many on this board. My only issue is the cost. It would seem to me that the easiest way to control some those costs would be to keep as much of the original system as possible (D-jet/L-Jet). I'm not sure how boost effects the MPS or if it's necessary to use alternative injection systems. When I had a 930, which was K-jet, I placed an Andial unit on the intake which activated the cold start valve for boost cycles. Could this be done? Andial is not around any longer but would something like this work?: http://1jzmerc.com/hks-faq/accessories/hks-aic

Basically cheers on you mate for wetting our appetite but find a way to make this work economically so I can forget about the 2270. Wait a minute? Don't you have a separate thread on "engine choices"? (IMG:style_emoticons/default/poke.gif)
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McMark
post Oct 17 2016, 07:22 AM
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Now that I finally have room in the shop for my car I made up a work list for the next few months. This is phase 1. (IMG:style_emoticons/default/happy11.gif)


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Mueller
post Oct 17 2016, 08:09 AM
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QUOTE(McMark @ Oct 17 2016, 06:22 AM) *

Now that I finally have room in the shop for my car I made up a work list for the next few months. This is phase 1. (IMG:style_emoticons/default/happy11.gif)



Everyone knows you cannot sell a turbo Type IV engine (IMG:style_emoticons/default/smile.gif) (IMG:style_emoticons/default/poke.gif)

Congrats on the progress!
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rtalich
post Oct 17 2016, 09:13 AM
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QUOTE(Mueller @ Oct 17 2016, 07:09 AM) *

QUOTE(McMark @ Oct 17 2016, 06:22 AM) *

Now that I finally have room in the shop for my car I made up a work list for the next few months. This is phase 1. (IMG:style_emoticons/default/happy11.gif)



Everyone knows you cannot sell a turbo Type IV engine (IMG:style_emoticons/default/smile.gif) (IMG:style_emoticons/default/poke.gif)

Congrats on the progress!


True that!!
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djb
post Jun 2 2018, 04:17 PM
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Great thread! Probably the best Turbo 914 thread on the web, thanks for documenting it.

I have a 75 914 1.8 that I am seriously considering doing a Turbo conversion. What would you say a safe level of boost and approx power a stock 1.7 or 1.8 street engine can support and be reasonably reliable without abusing it?

Im familiar with setting up and tuning stand alone FI systems, just not clear on what the stock engine will support when tuned properly/safely.
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ConeDodger
post Jun 2 2018, 04:38 PM
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QUOTE(djb @ Jun 2 2018, 07:17 PM) *

Great thread! Probably the best Turbo 914 thread on the web, thanks for documenting it.

I have a 75 914 1.8 that I am seriously considering doing a Turbo conversion. What would you say a safe level of boost and approx power a stock 1.7 or 1.8 street engine can support and be reasonably reliable without abusing it?

Im familiar with setting up and tuning stand alone FI systems, just not clear on what the stock engine will support when tuned properly/safely.


8psi...
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jim_hoyland
post Jun 2 2018, 05:25 PM
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Get that VIN ?
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QUOTE(ConeDodger @ Jun 2 2018, 03:38 PM) *

QUOTE(djb @ Jun 2 2018, 07:17 PM) *

Great thread! Probably the best Turbo 914 thread on the web, thanks for documenting it.

I have a 75 914 1.8 that I am seriously considering doing a Turbo conversion. What would you say a safe level of boost and approx power a stock 1.7 or 1.8 street engine can support and be reasonably reliable without abusing it?

Im familiar with setting up and tuning stand alone FI systems, just not clear on what the stock engine will support when tuned properly/safely.


8psi...


Good question; what determines the ultimate boost ?
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mepstein
post Jun 2 2018, 05:35 PM
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QUOTE(jim_hoyland @ Jun 2 2018, 07:25 PM) *

QUOTE(ConeDodger @ Jun 2 2018, 03:38 PM) *

QUOTE(djb @ Jun 2 2018, 07:17 PM) *

Great thread! Probably the best Turbo 914 thread on the web, thanks for documenting it.

I have a 75 914 1.8 that I am seriously considering doing a Turbo conversion. What would you say a safe level of boost and approx power a stock 1.7 or 1.8 street engine can support and be reasonably reliable without abusing it?

Im familiar with setting up and tuning stand alone FI systems, just not clear on what the stock engine will support when tuned properly/safely.


8psi...


Good question; what determines the ultimate boost ?

Crank it up until it blows and then you know to go a little less.
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