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The 1/4" NPT thermostat fitting screws into a gauge tee on the outlet of the turbo bearing block. However the specified American Volt thermostat fitting drives so far into the Summit Racing tee (finger tight) that it may as well be a gate valve. I ordered more tee's from Jegs and elsewhere same issue. Does anyone have a recommendation for both thermostat and AN/NPT/NPT tee that will actually work? The tees, stat or both are poorly cut.

I didn't have this issue with the parts I ordered from the material sheet. I do want to make a note however that the thermswitch is comprised of 2 parts, one with a tiny screw that goes into the larger npt thread fitting. If you over-tighten the thermoswitch itself it will easily break that tiny screw (ask me how I know.) When securing the npt fitting to the T-fitting, tighten it at the fitting itself, not at the thermoswitch.

Edit: Here's what I'm talking about:



Another way to explain is to attach the NPT fitting first and snug it up. THEN screw the thermoswitch onto the fitting using much less force (due to the tiny screw.)

I did not have that issue, mine screwed in and tightened prior to blocking flow at all. Sounds like there is a possibility the AV bushing is cut too small. Can you thread other fittings into your collection of “t” fittings and see if they go in too far or stop where you would expect? Then try the AV bushing in other fittings and see if it goes in too far on those as well. I’d guess that it would based on what you found so far. If no luck with sourcing a better fitting bushing maybe you could get a T with a 1/8 tap, and then drill and tap it to 1/4 npt yourself slowly working your way to the right cut size?

Yes the AV fitting seems to screw too far into everything I tried so I'm going to order another. If that doesn't work I'll try an inline brass tee or like what was recommended modify one to fit.

I did see that the AV stat is 2 pcs...

Thanks

Hey Peter did you ever come up with a good solution to this?

Spaceman wrote:Hey Peter did you ever come up with a good solution to this?

I tried several different gage tees from jegs and summit none were good with the 3 thermostats I bought. In each case the stat screwed so far into the tee it was like a partially closed valve. So I purchased a common brass reducer and put that in the gage tee...the reducer thread was much tighter so it didn't seat as far into the tee.. I screwed the stat into the reducer. Hopefully the added height won't effect the thermostat cutoff setpoint.

Spaceman wrote:Hey Peter did you ever come up with a good solution to this?

Sorry I should have said coupling not reducer.
Male end into the tee...thermostat into the female end.

Pic

Nice!! Thanks for the update. I also just saw that Sonex updated the instructions to add a note about this issue. They suggested using a 90-degree elbow but now that everything's installed I think a straight fitting like you used will be easier to access. I'll check mine and see if this is the same issue I have... hopefully that's all it takes to solve my ridiculously low flow rate.

Here's a link to the fitting for anyone else with the same problem: https://www.jegs.com/i/NOS/741/16784/10002/-1

I don't believe that I have this problem but was wondering if the cooling fan on anyone else's turbo runs for as long as 30 minutes after shutdown? I'm thinking that if that is normal, then I am fine. If everyone else's shuts down after 5 or 10 minutes, I may have this restricted flow ssue,