Twin Spark Project

hughqv · #1 (**permalink**) 07-16-2006, 01:47 AM

Just finished making the distributer, some pics for those interested. Will keep you posted on progress. Happy to supply same should anyone be interested.

rust collector · #2 (**permalink**) 07-28-2006, 03:53 AM

Tell us more about your dissy! Is it an adapted from a Nissan?

I'm just finnishing a Twinspark to go in a 105 and looking at the ignition options. I like the idea of mapable ignition, but I also like the idea of it looking sort of period with a distributor? How have you set the advance curve?

Whats the approximate cost?

Cheers Nick

**Craig** · #3 (**permalink**) 07-28-2006, 04:28 AM

G'Day Nick,

I can't answer for Hugh (I think it's Hugh) but if you're keeping the EFI then it's a Nissan twinspark cap and rotor grafted to an empty bosch ( or Marelli ) dizzy (no points etc).

If you're ditching the EFI it get's more complicated.

Both can be bought from Jim Steck http://www.autocomponenti.com/perfor...re_distributor

rust collector · #4 (**permalink**) 07-28-2006, 05:42 AM

Quote:

Originally Posted by Craig

G'Day Nick,

I can't answer for Hugh (I think it's Hugh) but if you're keeping the EFI then it's a Nissan twinspark cap and rotor grafted to an empty bosch ( or Marelli ) dizzy (no points etc).

If you're ditching the EFI it get's more complicated.

Both can be bought from Jim Steck http://www.autocomponenti.com/perfor...re_distributor

slyalfa · #5 (**permalink**) 07-28-2006, 12:39 PM

"Do you know if you can run a mappable system through a distributor"
yes that is very common you will need a triggerwheel some where ether in the dizzy or a lot better on the crank. the dizzy has a lot of shake so you get spark scatter. if you can trigger on the crank the timming will be rock stable. the problem with runing a single coil can be the charge time at max RPM if you run wasted coils you get 2x the time to charge. etc so as long as the dwel time for that one coil will fit for the max RPM you will run it will work fine.

turbolarespider · #6 (**permalink**) 07-28-2006, 01:11 PM

Quote:

Originally Posted by rust collector

Out of interest on EFI systems what the square block the the HT leads come out called? Do they perform the same function as a coil? Can you get individual units or do they only come as blocks of four?
Sorry if this is a supid question, but I just was wondering if you could put them in the body of GTA style distributor to provide the look, but retain the functionality?

Cheers Nick

rust collector · #7 (**permalink**) 07-29-2006, 05:15 AM

Quote:

Originally Posted by turbolarespider

They are called coil packs. You can get them individually, for coil-on-plug applications, or packs of 2, 4, or 6. The two packs are what Electromotive used on their TECII's. 4 packs are what we commonly used for 4 and 8 cyl products, and 6's for 6's.

If you could use a single 4 pack, there's no reason why you could not mount it to sit in the exact same position as the distributor- having a hole that large should be able to hold up a pretty heavy thing. Pait it red, and only the very observant would notice that it's not a real distributor.

One interesting solution for the distributor style ignition- use a Mega Squirt... no need to use the inectors- you can just use the spark output that can be set up to run a distributor. Not sure which one off the top of my head, but you can...

Eric

alfazagato · #8 (**permalink**) 08-01-2006, 03:23 PM

By the way, there is a repacement distributer called the 123\GB-4-R-V which replaces most 4 cyl Lucas distributers. Marelli drives and shaft sizes appear to be the same as this unit which is no surprise as Lucas and Marelli were interchangeable on the earlier cars. But what makes this distributer interesting, is that it has 16 different advance curves. In effect it is mappable. No connection to the Company..find them on 123ignition.com.

rust collector · #9 (**permalink**) 08-02-2006, 05:21 AM

Quote:

Originally Posted by alfazagato

By the way, there is a repacement distributer called the 123\GB-4-R-V which replaces most 4 cyl Lucas distributers. Marelli drives and shaft sizes appear to be the same as this unit which is no surprise as Lucas and Marelli were interchangeable on the earlier cars. But what makes this distributer interesting, is that it has 16 different advance curves. In effect it is mappable. No connection to the Company..find them on 123ignition.com.

alfazagato · #10 (**permalink**) 08-02-2006, 10:49 AM

Don't know. Give 'em a e-mail find out. May be just the thing for you! Best of luck

turbolarespider · #11 (**permalink**) 08-03-2006, 06:44 AM

Quote:

Originally Posted by rust collector

Thanks for the info Eric,
From reading the other threads mega squirt looks interesting, but as you can see I don't know heap about electronic sytems! What would be required to use it in a twinspark application? Has anyone actually done it successfullyin a twinspark?
Can you buy the components made up?

Cheers Nick

nda9h · #12 (**permalink**) 08-03-2006, 07:10 AM

Hi,
i´m currently building a TS engine with an EMS Stinger ECU ( http://www.enginemanagementsystem.com/ ), and i just use the engine´s original 60-2 crank wheel with the standard sensor. My setup is 4 double-coils in a distributorless, wasted spark setup (cylinders 1+3 and 2+4 always fire the sparks at the same time).

That should work very fine, and this kind of setup should also be possible with other engine management systems as e.g. megasquirt.

Thomas

Max Banks · #13 (**permalink**) 08-03-2006, 12:17 PM

Quote:

Originally Posted by nda9h

Hi,
i´m currently building a TS engine with an EMS Stinger ECU ( http://www.enginemanagementsystem.com/ ), and i just use the engine´s original 60-2 crank wheel with the standard sensor. My setup is 4 double-coils in a distributorless, wasted spark setup (cylinders 1+3 and 2+4 always fire the sparks at the same time).

That should work very fine, and this kind of setup should also be possible with other engine management systems as e.g. megasquirt.

Thomas

turbolarespider · #14 (**permalink**) 08-07-2006, 07:17 AM

Here's some info I got in an e-mail from a friend of mine who is a parts person:

Quote:

I will research it. I know where to look for a few items but I will get them all tomorrow.

Also if he hasn't, he should read this:

http://www.megasquirt.info/ms2/EDIS.htm

It has most of the info on there about sourcing the parts.

And this

http://home.earthlink.net/~beanbooge...t_engineering/

ignition module -
coil pack - E9TF-12029-AA, E8TF-12029-AA tone wheel - Needs to be 89-02(?) Ranger crank sensor -

I will fill in the blanks later ^^^

GTV-GR · #15 (**permalink**) 11-06-2009, 02:29 PM

seems everybody has done it but no one tells about it.
How the devil you fit the rotor and cap , what you do with the mechanical advance? what kind of distributor u use ? i got a magneti marelli early one with mech advance and there are many issues , the mechanical advance unit makes the nissan cap sit about 6cm from the dist base