MicroSquirt.com read only forum (Jan.15,2018)

I have a question on TPS sensors, is it true most of them read from 0 to 5 volts? The reason I ask is from my research the TPS sensor that was supplied with my TWM throttle bodies is a Rover part ! Not exactly a over the counter part. I have the old ( bad ) one that I plan on taking to local parts ...

You can also use the cheap $35 LED A/F meters designed to work with a narrow band O2 sensor. Run one output of the LC-1 to the LED meter and it'll be acccurate, as opposed to using it with a narrow band sensor, where it doesn't really measure much.

jack

Also, following cooling system swirl pot design, use a cylindrical tank, and feed the high velocity return fuel in tangentially part way up the tank. This swirling action forces the vapour bubbles to the centre where they can rise up to the vent line that returns to the main tank.

That was a pain ...

Once plugs get soaking wet, they sometimes don't fire again correctly. I'd swap them out with new ones or burn them clean with a propane torch.

I'll leave the running issues for others with more experience.

jack

Whatever you use, you can test to full pressure by deadheading the return line at the tank until you get full pressure, then shut the pump off and go look for leaks. Test everything.

Great idea PSIG. It takes the regulator out of the equasion and allows full pressure. I should have though of that ...

The injectors on my manifold (mid-80's Rover) use hoses over smooth pipe. It's only a 36 psi system, but a smooth pipe is a lot different (more apt to leak or slip) than a barbed fitting.

Use the correct injection hose and clamps and you should be fine.

jack

I'm building my FA intake out of 2.5 inch exhaust pipe and rubber elbows. The is for a 3.5 liter V8. In time, I'll insulate the pipe with a layer of Carbon Fiber (so it'll look faster) or just paint, inside and out. This will help a great deal. Remember that most of those commercial cold air ...

FI pumps really are not good at pulling vacuum to get their fuel supply. If you have your pump in the front of the car and the fuel tank is in the back, especially if the pump is higher than the tank, this is likely your issue.

Injection pumps are happiest when they are close to and below the fuel ...

About the filter being infront or behind - is there an offical stance on this? Some say put behind pump so that dirt won't harm pump as sock on pickup isn't good enough, others say only infront.... kind of confusing.

Filters always should go after pumps. This is because if they plug, after the ...

I would assume it would be 18.3 lb, like virtually all of the RV8's. Hmm, now I'm thinking 18.13. I'll look it up over the weekend, while I'm home, if no one respond before then.

jib
TR's 3&8