Not Enough Spark?

[flat out]

ok guys, took my car to the mechanics and there diognostic was that the boost is blowing the spark out, the spark was around 10-000 volts where it needed to be around 30-000+,

they recomended to go electronic distributor

 

the thing is my old engine was running points and it ran fine, loved the boost,

 

my boss (mechanic) told me that theres something wrong and it might not be getting enough power in,

 

i have tryed new, plugs, points, dizzy'z, condensors, leads are fresh as are the rotor buttons and dizzy caps, i have mucked around with plug and point gap, no difference, also heaps of different timing.

 

it runs better but still not great with the turbo pipe off, aka NA, but still not good-great.

 

i just fitted a new coil and its made no difference,

 

I'm going to test my voltage imput next, before and after the balast,

 

the only other thing i can think of is a dirty earth? or not enough earth straps? think it has one or 2 atm?

 

any help at all would be great as its really starting to annoy me

 

 

if it helps iths a 2tc with a blow thru turbo system

[Falken_KE30]

Is the battery in boot?

Is the battery in good condition?

 

Could possibly be a bad earth,

Have you tried running a Hi Energy coil without a ballist resistor, I'm sure that causes the points to burn out quicker but might give a stronger spark?, but so will your tyres and other parts anyway :y:

 

Maybe try a MSD ignition box thing, provides like 3 times the spark. then again it don't explain why it ran on last motor :hmm:

[Medicine_Man]

Intensity of the spark is due to the field collapsing faster, That's why transistorized ignition systems are better for this sort of thing. Do yourself a favor an invest in an electronic dizzy..

[flat out]

yeah thats what every one says, but imo its just masking the issue, i just need to get the ignition system running as good as it should with the points, if that fails me then elec is the way

[philbey]

The point about the MSD is a good idea though - I'd run the Crane Cams Hi-6 over the MSD 6AL, its a digital unit (vs Analog in the MSD's), cheaper, and has a much nicer in built rev limiter setup too.

[Felix]

I'd use a multimeter and check the voltage at the coil. 10,000 volts is very low.

 

I've got one of those spark tester tools.

My ke15 with points dizzy, echlin sports coil and older dick smith HEI kit puts out 30,000 volts at idle.

When I had a 5k electronic dizzy with Bosch transformer coil it put out 40,000 volts at idle.

[flat out]

yeah the crane one was what the parts store had, the guy that was going to tune it recomended the msd, but ild rather a crow sticker :y:

 

$280? from memory maybe cheaper, then ill get a decent coil aswell.

 

does anyone think that an extra earth strap would help?

[Taz_Rx]

  flat out said:

does anyone think that an extra earth strap would help?

 

Can never have enough earth mate! :y:

 

Only problem with the hi-6 is I don't think you can get a Hi-6 "BTM" equivelent (I know casey knows what I mean).

[flat out]

ok, brought a spark tester, I'm getting a max of 22-000 volts on idle, still coughing but no excessive bangs, more like a fuel suge?

[irokin]

Whats your spark plug gap?

[flat out]

it was just how they come from the box, then i gapped them right down, just buy eye, no feeler guage

[irokin]

I'd be gapping them properly, at a guess probably to something like 0.040. Also whats the heat range of the plugs? Its possible they're too cold.

 

Just to give you an idea how much voltage turbo motors have for spark, the SR20DET coilpacks produce about 40,000 volts.

[philbey]

BTM?

[Taz_Rx]

MSD BTM ie Boost Timing Master. Has a vacuum line to it and retards the timing for boost. :yes:

[flat out]

its going a little better, going to buy a crane elec dizzy conversion this week and a coil to suit, been driving it, too noisy tho, goes well under load but wont rev past 4k