I have a couple vacuum gauges. Will see what ranges they are.

Now i I want to test FM’s and see what it takes to pull one. Curious to quantify ‘50%’ pulled, etc.

 

That would be awesome to know. Hey, I think I have a vacuum kit in the garage. 🤔

 

is it a phenomenon like when you hold your hnd over the end of a leaf blower and it revs up higher? or when a vacuum cleaner gets blocked off it spins up faster?

 

Regardless of what intake is ran the 11+0 compressor is BY FAR the quietest compressor for the S300 turbos. Unfortunately and I dont know why, but aftermarket compressor support is only available for the S366.

 

Don’t you love it when you forget about having a tool? So I don’t know why I needed it but years ago bought a vacuum pump tool. I got a crazy discount because the gauge was messed up. Since I wasn’t using it for the gauge aspect I didn’t care and bent the needle back to zero and carried on. The needle does correctly go to zero but I don’t know the accuracy of the gauge.

So putting the vacuum pump on the FM I learned that it doesn’t take much to pull it in. Very hard to get a reading without going too far. And the FM pulls before the increments in the gauge. My best guess is the FM pulls to 50-75% at around 0.05 bar which converts to 0.72psi (I know not the correct way to measure vacuum but this puts it into something we can relate to).



About 0.05 bar takes it to 50-75%

SSJ hopefully you have a better gauge to get more accurate readings.

And now the question becomes how much vacuum is too much?

I would equate it with covering up the suction side. With restriction in the intake (filter) it would cause the intake tube (between turbo and filter) to pull a vacuum. This is what makes the FM pull in to show “needs filter”.

I’m not exactly sure what you’re saying here. The S366 has a different option that is even quieter than the factory SXE impeller?

The 364.5 SXE is a quiet turbo. The intake suction sound is much quieter than the MST in my opinion. The SXE turbo whistle is also quieter and has a different pitch which is less annoying than the MST. Not that I was bothered by the MST at all. Now the 38R is down right obnoxious.

 

Yes, the S366 has a compressor wheel option that is 11+0 (11 tall blades, 0 short blades) vs. the 7+7 wheel. It almost sounds Naturally Aspirated with the 6637 unless you start pushing it.

 

I see less smoke with PHPs 80HP tunes then their 65HP tunes.

 

regarding this ais and minder, page 2 of this is a good real with pictures, i going to try that flap

https://www.ford-trucks.com/forums/1...w-rates-2.html

 

I feel that I must make it very clear that a S366 is NOT the same turbo as a S366SXE. Just for future readers and to keep thoughts on the right track.

 

Unloaded I noticed more smoke in the PHP 80HP vs the PHP 65HP. Although, I was WELL under the turbo in 5th gear at 35 MPH and below 1000 RPM at times, on purpose and because I can. Again, this was on purpose to try and get the turbo to smoke up.

At normal MPH and RPM, there was very little smoke, if any at all that I could see. I could not see it out of the rear view mirror on the passenger side, but I could see it with the rear sliding window open looking out the windshield rear view mirror. Tomorrow I plan to run the 80HP to the campground and in a week I will run the 65HP back home the same route. I plan to log FORScan data during each trip.

 

Partially correct, my turbo is 90% SXE. Turbine wheel is same SXE series, same .91 housing and center section only difference is the compressor cover and the different compressor wheel itself. Basically it would come down to swapping the compressor housing for an SXE series to make them equal on paper. S366 is a broad term since there is no such thing as just an "S366". There are two series of the 366, the S366SX3 and the S366SXE. The SX3 has a "clipped turbine wheel" a 7+7 CAST compressor wheel, 270* thrust bearing and "tractor" compressor housing with a 3" outlet instead of the 2.5" found on the SXE.

 

Now you sound like my wife when we are bickering at each other about something ridiculous.

I apologize for not being 100% correct in your opinion and not going into great detail as you have. I figured that since most of the FTE does not desire great detail regarding the engineering and machining of the various turbos on the market that my statement was both broad and detailed enough for 99% of the FTE readers. Also, I didn't want to muck up the thread any more than I may have already.

Again, thank you for going the whole nine yards and filling in the perceived blank spaces in my broad statement.

All that said, I am wrong everyday, so take my broad statement as you will.

 

Point being if you have an S366SXE you have access to a market of different compressor wheels that are not offered to the 363 364.5 369 series. True SXE or box stock SX3 the compressor wheels all interchange, giving them a slight aftermarket gain if you desire a certain noise level. FordTruckNoob posted earlier how he likes the sound of the 38r and will miss it a little going to the 366SXE. If he desires it is quite easy to change it out for a 6+6 that will be plenty loud because the market offers that option. Much like the multiple options of compressor wheels offered for the gtp38.

 

Point taken...

I'll see my way out of the conversation now as I don't think I have anything else to add at this time. You have filled in all the blanks and done a marvelous job of doing so. The FTE is very appreciative sir!

 

Why oh why did you have to further my education with regard to alternative compressor wheels for the S366SXE? I was feeling pretty pleased with myself after buying all the parts and emptying my bank account. Now you tell me there's more PMS fodder. My wife may list you as a contributing party in our divorce papers.