My 200SX S13 1991

The Damn Fifth gear just wont go in!!!!!

What is the problem???

I think you should phone and get quotes at gearbox places, I don't think any one of us are able to fix gearboxes, Jay boy did his own but he is not around that much

I guess you right....

ChemCool wrote:

think he just used that figure to get his point across, could of said 12v or 4v i suppose.

Sure, ok. Just making sure we dont get confused

i am not worried about the power transistor. that is a constant in the equation.

what i am saying is that i "heard" that if you use a bigger, higher, stronger (whatever) trigger, your coil will output a bigger, higher, stonger (whatever) output!

is this true?

and drillergy, if your gearbox isnt working and you cant do it yourself, then i'm afraid it has to go to someone who can do it. in this case i would recommend a "professional"!!!

Yes, if you use a "stronger" coil, then it will output a higher voltage and you will get a better spark. The power transistor can't supply more voltage than that power supply (which is about 14V for a car battery, unless a charge pump is used, but I doubt that), so your only option of getting a higher voltage to the spark plug is to use a coil that has more windings (it works like a step-up transformer). Or you could use some electronics jiggery pokery to get the transistor or ECU to supply a higher voltage using one of those amplifier jobbies in the pic ( which will probably use a charge pump or dc-dc converter to increase the voltage to the coil). Bear in mind that the coil is only designed for a certain voltage in the primary windings, so if you increase it, you run the risk of melting the coil, especially at higher RPM's.

If you look at what the ignition amplifier does, it provides more juice for the coil... the ECU can't provide 30Amp per channel continuously so the more amperage available to the coil the better the spark will come out even at high RPM, since at high RPM (8000) there is roughly 33 sparks ignited every second per channel, thus the ignition amplifier must be able to provide enough amperage and quickly enough for a coil to spark to its full potential...

Voltage don't matter, the ignition amplifiers are triggered with very little voltage and at low current, but they amplify power drawn from the battery.

😀