Romans 2005 Toyota Echo

[Nominal]

1 hour ago, jakesae101 said:

Those tohatsu pumps were great but jesus they were the loudest thing ever during training we had to wait to fire them up until mid morning as not to wake the neighbors. This is a racecar tho it needs a wajax pump….

The model with the Sachs rotary?

[Roman]

No tyre rubbing at this ride height. How good! 

Its win win with the small tyres - the effective final drive ratio improves, car gets free slam, and the guard clearance improves as well. 

[anglia4]

15 hours ago, Nominal said:

The model with the Sachs rotary?

Or 10 weed eater motors

[h4nd]

Would dearly loved to have seen the helmet double take as this flew by (ext LR cam pleeeese?  ). Would totally suit a set of Mad-Dog Pizza livery (I'd pitch in for that).

[tortron]

Hatervision

[Rhyscar]

Good to see the bump stops doing their job. Car looks great on the 13's Dave! 

Pity about the water pump. Time for external jobbie? or run twin water pumps so if one fails it switches over? lol. 

[Roman]

Cheers, I'm stoked with 13s, it all worked out awesome.

Yeah waterpump is a pain alright. Id switch it back to a mechanical pump if it were easy to do on this motor.

[h4nd]

Water pump: I could make you a little clip on widget to look for V spikes at that part of the loom? (just a Zener running into a small R which is likely to blow with a generous voltage excursion)

[GARDRB]

But but but.... how did you mount the wing?

[Roman]

Little L brackets between underside of wing and the hatch. And some riv nuts near the leading edge.

 

 

@h4nd one theory my dad has, is that since theres no alternator on the factory engine, the 12v supply is highly regulated and stable. So I might just be running it outside of what its designed for in that regard. But the data sheet for that capacitor shows its susceptible to both heat and vibration, so it could also just be a 9000rpm thing.

 

[kicker]

What type of cap is it? Can't imagine swapping types would cause issues, have done it in a few amps of mine.

[h4nd]

3 hours ago, Roman said:

@h4nd one theory my dad has, is that since theres no alternator on the factory engine, the 12v supply is highly regulated and stable.

Interesting. How much current? Could loan / find you a DC/DC converter to keep its supply clean.

[fletch]

We had a problem with some caps failing on some equipment bolted to one of our gas compressors.

We got the upgraded factory device and i dissected it to discover they had just put a blob of hot glue against the cap. Still going strong 17500 hours later

[VitesseEFI]

11 hours ago, Roman said:

so it could also just be a 9000rpm thing.

This would be my bet…

[flyingbrick]

I'm no electrical engineer, take this with a grain of salt, I'd have thought the vehicles battery would do a very good job of smoothing voltage across the entire vehicle? or @Roman do you think even the increase to 14.5v during charge is likely too much of a fluctuation? If you need more smoothing just throw in a small bank of capacitors to take out higher frequency oscillations

[ajg193]

9 hours ago, flyingbrick said:

I'm no electrical engineer, take this with a grain of salt, I'd have thought the vehicles battery would do a very good job of smoothing voltage across the entire vehicle? or @Roman do you think even the increase to 14.5v during charge is likely too much of a fluctuation? If you need more smoothing just throw in a small bank of capacitors to take out higher frequency oscillations

Nah battery isn't quite enough. You can hear your ignition through your AM radio.

 

Bit of potting around at risk components is a legit idea, probably already done by Toyota though.

We cut our crystal failure rate after ultrasonic welding by thirty just by potting them first

 

Also, I'm not an electrical engineer so don't take everything I say for gospel

[Yowzer]

I still think a ESC from a RC car / drone is worth investigating haha

No idea if they'd actually be compatible with the motor, but I don't see why not, pretty sure they're just a regular brushless design.

[Transom]

42 minutes ago, Yowzer said:

I still think a ESC from a RC car / drone is worth investigating haha

No idea if they'd actually be compatible with the motor, but I don't see why not, pretty sure they're just a regular brushless design.

Rc escs get their control signal as a pwm from the receiver so a link ecu should be able to drive one no problem … water pump controller $250+
Rc 200amp esc - $60-80 … 

[VitesseEFI]

Saw this and thought of you….. possibly not relevant at this point but maybe one day 

[Roman]

That's the exact pump that my engine uses, but since It's not connected to a factory ECU then the diagnostics isnt the same. 

I guess the good news is that I know what the issue is, and some ways to hopefully resolve it.