1jz E36 BMW frankensteining

[Mitevo7]

Ah, I thought the CEL triggered a reset

The CEL only appears when the RPM stops working, like i said the issue can be resolved by simply restart the car. Of course i hope there is a remedy for it.

 

[^pomen_GTR^]

The CEL only appears when the RPM stops working, like i said the issue can be resolved by simply restart the car. Of course i hope there is a remedy for it.

do you have any volt meter to monitor voltage issue to see if it related

 

[Mitevo7]

do you have any volt meter to monitor voltage issue to see if it related

At times when my car's voltage drop by 12V, this will happen, however i can't find relation to the RPM.

Thanks,
Ken

 

[Izso]

At times when my car's voltage drop by 12V, this will happen, however i can't find relation to the RPM.

Thanks,
Ken

to drop to 12v is kinda low. how's the grounding for your car?

 

[Mitevo7]

to drop to 12v is kinda low. how's the grounding for your car?

Grounding's good, mechanic thinks that the Fan and AC is draining too much power from the alternator. Car runs perfectly fine without AC, occasionally when cooling fan kicks in, the voltage can drop from 14.1 all the way to 13.1v ...

Thanks,
Ken

 

[vr2turbo]

Grounding's good, mechanic thinks that the Fan and AC is draining too much power from the alternator. Car runs perfectly fine without AC, occasionally when cooling fan kicks in, the voltage can drop from 14.1 all the way to 13.1v ...

Thanks,
Ken

The current drawn seems to be very high......

 

[gunnerzz]

The current drawn seems to be very high......

Interesting to see how much load (amp) the fan draw when it kicks in. should be easy to test. I bet it consume at least half the alternator output during idle.

 

[Mitevo7]

The current drawn seems to be very high......

Yeah man, we have a hard time to try to rectify the issue, the original electric fan eats up lots of current. The issue is not apparent if i was driving but at idling. Our next option is to modify the alternator pulley so that at 800 rpm, the alternator can spin faster to increase voltage output, i have a voltage regulator that regulates voltage at 14.5 to prevent overcharging the battery.

Thanks,
Ken

 

[Mitevo7]

Interesting to see how much load (amp) the fan draw when it kicks in. should be easy to test. I bet it consume at least half the alternator output during idle.

I think it drew at least 20 over amp easily. My 1JZ alternator is 100 amp, so you can guess with all the accessories on, i almost used up the juice.

Thanks,
Ken

 

[vr2turbo]

Yeah man, we have a hard time to try to rectify the issue, the original electric fan eats up lots of current. The issue is not apparent if i was driving but at idling. Our next option is to modify the alternator pulley so that at 800 rpm, the alternator can spin faster to increase voltage output, i have a voltage regulator that regulates voltage at 14.5 to previous overcharged.

Thanks,
Ken

Bigger drive to smaller pulley will be heavier, moreover even though won't over charge, will it over work the alternator at high speed?

 

[Mitevo7]

Bigger drive to smaller pulley will be heavier, moreover even though won't over charge, will it over work the alternator at high speed?

The pulley is only 10% smaller than the current size, according to mechanic, it only will burnout the carbon brush sooner. But since the carbon brush is new so it won't be burning out very soon.

What's your input on that statement?

Thanks,
Ken

 

[Izso]

The pulley is only 10% smaller than the current size, according to mechanic, it only will burnout the carbon brush sooner. But since the carbon brush is new so it won't be burning out very soon.

What's your input on that statement?

Thanks,
Ken

10% is a lot... Personally I would not do that to an alternator. Suggest you try uprating it la.

 

[vr2turbo]

The pulley is only 10% smaller than the current size, according to mechanic, it only will burnout the carbon brush sooner. But since the carbon brush is new so it won't be burning out very soon.

What's your input on that statement?

Thanks,
Ken

I am not an electrical nor electronic expert but my previous Accord had the diodes melted in my stock alternator, so not only the carbon brush but will it affect other parts?

 

[vr2turbo]

10% is a lot... Personally I would not do that to an alternator. Suggest you try uprating it la.

Means bigger output alternator rather then over clock the old one......lol

 

[Mitevo7]

Means bigger output alternator rather then over clock the old one......lol

I suggested that, but the mechanic said its not necessary can cure the low rev voltage low problem, especially when fan is kicking in. He asked me to try the pulley first, if it works, then pay, if its not, then no charges.

Thanks,
Ken

 

[^pomen_GTR^]

The pulley is only 10% smaller than the current size, according to mechanic, it only will burnout the carbon brush sooner. But since the carbon brush is new so it won't be burning out very soon.

What's your input on that statement?

Thanks,
Ken

should be usable and monitor..

if it works fine...then keep using it...

 

[vr2turbo]

I suggested that, but the mechanic said its not necessary can cure the low rev voltage low problem, especially when fan is kicking in. He asked me to try the pulley first, if it works, then pay, if its not, then no charges.

Thanks,
Ken

In that case go ahead and test first......

 

[Mitevo7]

In that case go ahead and test first......

Yeah, just need to find time to drop the car over to install the pulley, fan belt will need to find slightly shorter to accommodate the reduce pulley sizes.

Thanks,
Ken

 

[Nightstalker1993]

At times when my car's voltage drop by 12V, this will happen, however i can't find relation to the RPM.

Thanks,
Ken

When does it drop to 12v? Does your actual engine RPM drops when it drops to 12v?

 

[Mitevo7]

When does it drop to 12v? Does your actual engine RPM drops when it drops to 12v?

When cooling fan kicked in with A/C system on, the rev will drop to the 500 rpm and 12.1 V. If i turn of the A/C, and fan is not kicked in, the volt will at 13.6 v

Thanks,
Ken