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> Anyone looking for a Turbo type 4 motor?, Comes with 1976 chassis.
matthepcat
post Aug 11 2016, 01:00 PM
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https://sfbay.craigslist.org/sby/cto/5725629865.html

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krazykonrad
post Aug 11 2016, 01:49 PM
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Everybody knows you can't... (IMG:style_emoticons/default/blink.gif)

Konrad
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HAM Inc
post Aug 11 2016, 03:03 PM
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QUOTE(krazykonrad @ Aug 11 2016, 12:49 PM) *

Everybody knows you can't... (IMG:style_emoticons/default/blink.gif)

Konrad

Not trolling, just sharing info. (IMG:style_emoticons/default/smile.gif)

I've prepped plenty of T4 heads for turbo engines. The heads aren't well suited for it, but with a small bore and low revs they can be made to work for a while.

T4 heads are inherantly weak in the ex port area and as a result are extremely vulenerable to elevated EGT's, which all turbo engines are prone to. This is why small bores work better than big bores, as the bigger the bore, the weaker the head.

Thermal coatings are a must!
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Dave_Darling
post Aug 12 2016, 09:46 AM
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QUOTE(HAM Inc @ Aug 11 2016, 02:03 PM) *
Not trolling, just sharing info. (IMG:style_emoticons/default/smile.gif)


That's an old inside joke. "Everybody knows you can't turbo a 914!"



QUOTE(Jeff Bowlsby @ Aug 11 2016, 07:45 PM) *

Seems to me that when Jeff Shyu was doing his, he used a rising rate fuel pressure regulator. ... I don't understand how the correct pulse width could be attained using an MPC based system.


If the fuel pressure is right, you don't really need the correct pulse width. But fuel pressure is a pretty coarse adjustment, I think...

--DD
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Andyrew
post Aug 12 2016, 11:10 AM
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QUOTE(Dave_Darling @ Aug 12 2016, 08:46 AM) *


QUOTE(Jeff Bowlsby @ Aug 11 2016, 07:45 PM) *

Seems to me that when Jeff Shyu was doing his, he used a rising rate fuel pressure regulator. ... I don't understand how the correct pulse width could be attained using an MPC based system.


If the fuel pressure is right, you don't really need the correct pulse width. But fuel pressure is a pretty coarse adjustment, I think...

--DD


I agree. Granted people have been doing it on Honda's and other 4 cyls for years. They generally all blow up though.. Its not a long term solution.

I think the only real solution is a standalone system like Megasquirt. Being able to adjust the timing will really help low end torque and the ability to run lower boost for a higher power gain.
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