Another microsquirt install

[Max Welton]

Is there a valve to allow air to be purged (at least once)?

Max

[55superbeetle]

His system doesn't dead head the pump. It just has a very short loop up front that is regulated, with the fuel rails Tee'ed into that loop ending up at a dead end at the rails.

I'm curious how it works out and why we I haven't seen it done before.

So basically the pump bleeds off excess pressure with a small loop to the tank? In this case, would the pump basically work like it had a FPR built in? Thats really cool. Your loop is basically contained completely under the tank and then you are just running the needed/regulated pressure to your fuel rails?

Rad.

Yes, correct. I see you're in turlock. I'm in modesto if you ever want to talk shop.

Is there a valve to allow air to be purged (at least once)?

Max

No. Im guessing the small amount of pressurized air that gets trapped escapes with the first few injector openings. Some of the newer vw's that are returnless have the regulator and return line built right into the fuel filter. I service them all the time and always start right up without any drama after getting air in the lines.


Slowly getting the car dialed in. I may need to switch up my coolant temp sensor though. I copied a setup I have seen on here by adapting a gm thermistor into a copper ring terminal. I filled it with heat transfer compound and then capped it with epoxy but it seems very slow to respond. I used the cylinder tin screw hole but because of the fiberglass shroud I dint think its getting good heat transfer. Anybody have other solutions? I think I have seen a setup with air temp sensor mounted under the cylinders. I have found that the warmup enrichment isn't affected as much as my settings for idle valve. Because the sensor doesn't move quick enough with engine temp, I cant get consistency in warm up idle speed, but I could just be getting picky now. Or maybe I should try closed loop idle control?

I have also seen some stuff lately on table switching to expand the table. I might try to do this to give me better resolution in the real low vacuum areas, where it spends most of the time. It's funny, I have had my personal project car running ms2 for almost three years now and I am still constantly learning and playing with the tune, and it is still far from running perfect like a factory efi car. Gives me so much respect for the real calibration engineers that get engines to run perfect in basically any condition.

[Steve Arndt]

What kind of Kpa numbers are you seeing with that the plenum setup? How is throttle tip in with respect to light load and Kpa numbers?

[juki48]

I bolted my clt sensor under an intake manifold bolt.

I got one that had a thin probe and pressed it into a copper ground loop. I then wrapped in insulation and shrink tube because I'm weird.http://www.amazon.com/gp/product/B001W0 ... UTF8&psc=1

[mrblyoung]

Yes, correct. I see you're in turlock. I'm in modesto if you ever want to talk shop.

I am down. I have seen and watched multiple builds of yours, but have never actually met you. Im always down to chat with smart car guys. PM me your info and maybe I will stop by one of these weekends and introduce myself.