What starter relay ampage?

[monstergrowler]

Does anybody know what current rating the starter realy should be rated to in terms of A?

[blitzracing]

Hundreds- depends on how cold the engine is, a thick oil takes more power to move than hot oil. I think a minimum would be about 60 amps up to around 250. The only thing that limits the current on a stalled starter (when you first apply power) is the DC resistance of the windings, supply cable and internal resistance of the battery, which is fractions of an ohm, so the intial current is very high. Once the starter motor starts to turn, it also acts a bit like a generator pushing power back into the battery, so less current is drawn overall as its speed increases.

[That Daddy]

do you mean the relay that supplies the trigger +12v to the solenoid(small terminal)?.

[blitzracing]

Mis read the question, thought it a tad stange -go to the bottom of the class

[That Daddy]

blitzracing said:

Mis read the question, thought it a tad stange -go to the bottom of the class

Dont know you have Mark, i am a bit miffed myself

[monstergrowler]

Hi Yes Daddy I did mean to supply the 12V trigger solenoid.
Any ideas?

[That Daddy]

OooErr,,,,,,,,30/40A i would have thought would be fine,most cars trigger direct from ignition swith anyways.

[spend]

I would hazard a guess that even the smallest 20a relays or 25a micro relays would suffice.

Dave

[Ribol]

That Daddy said:

30/40A i would have thought would be fine,most cars trigger direct from ignition swith anyways.

[spend]

Ribol said:

That Daddy said:

30/40A i would have thought would be fine,most cars trigger direct from ignition swith anyways.

Is that a lithp, ith he one of them Gwiffith chappette types?

[monstergrowler]

Thanks for your help chaps.

[That Daddy]

spend said:

Ribol said:

That Daddy said:

30/40A i would have thought would be fine,most cars trigger direct from ignition swith anyways.

Is that a lithp, ith he one of them Gwiffith chappette types?

Spend,as long as im around you will only ever be second best.

Edited by That Daddy on Saturday 29th September 08:22

[david beer]

The solenoid "would" draw 12-15 amps if the wiring was up to it, hence the need for a relay back into the circuit.

[spend]

That Daddy said:

Spend,as long as im around you will only ever be second best.

Huh? Not noticed you even contributing to the Griff/Chim teasing stakes... Take your head out of your a..e, I wasn't winding you up!

Dave

Hmmm but I haven't had any North/South, BreachBoy or Speling mischief for a while...