EFI University

tony94s4 · Joined: 15 Apr 2010 Posts: 16

can lt10s drive the ign-1a coils with built in ignitors?

my curent setup is maxed out lt10s+x4+bosch coils,
505whp, 439 torque mustang dyno on e85,
93 mazda rx7

Pantera EFI · Joined: 12 Feb 2005 Posts: 1268 Location: So. California

The IGN-1 Coil could use the Micotech's internal Ignitors.

The Microtech site has no information found about the internal ignition drivers current rating.
The Pantera EFI ECU uses 36 AMP drivers though 25 AMPS should work.
(25 AMP coils)

The IGN-1 & IGN-1A have the same output, the IGN-1 costs less.

Lance

tony94s4 · Joined: 15 Apr 2010 Posts: 16

thnx Lance,

Its hard on microtech u can't get no suport and their forum has been down for a wile,

not sure on the drivers but I think it gives 12v signal and x4 converts it to negative and the IGN-1A I have take fallin 5 volt to fire,
will that be a problem if I ditch the x4 and the signals going to x4 hookem straight to the coils?

I was going to ditch microtech completly on my new engine but
blew the engine on one of my lotuses so need to rebuild it before I can spend more money on the rx7

10sec_rx7 · Joined: 27 Feb 2005 Posts: 379 Location: Sydney Australia

it shouldnt be a problem worst case it will burn out the X4

tony94s4 · Joined: 15 Apr 2010 Posts: 16

I was going to eliminate the x4 and run the signal straight to the coil since ign-1a have built in igniters, can I do that?

or do i still need to use the x4 box?

C. Ludwig · Joined: 29 Sep 2006 Posts: 244

You can run the IGN-1A directly off the MT. Output edge is falling. I'd start the dwell time at around 2.5ms and go up from there. Keep in mind the MT is running the leading in wastespark. A 3.5ms charge time will be a 93% duty cycle at 8000 rpm. Just keep that in mind.
_________________
Haltech, AEM, Apexi PFC Sales, Installation, Tuning
Custom Harness Solutions
www.ludwigmotorsports.com

tony94s4 · Joined: 15 Apr 2010 Posts: 16

U R THE MAN Smile

thnx u made my day,

I will wire them up and give them a try,
by the way my lt10s is setup for direct ignition I think
with the x4 box,
with stone age ecu like microtech who knows

10sec_rx7 · Joined: 27 Feb 2005 Posts: 379 Location: Sydney Australia

lt10s is sequential on the leadings so you wont have any problems,

even with the X4 box and 4 FC trailing coils i have done over 700rwhp with a little 12a so thay work pretty well

tony94s4 · Joined: 15 Apr 2010 Posts: 16

thnx 10sec_rx7
couple more questions please,

how safe is it to run the 2step on my turbo rx7 with lt10s?
and does it cut ignition or fuel?

10sec_rx7 · Joined: 27 Feb 2005 Posts: 379 Location: Sydney Australia

its fine to run it, but you will not have the drag racing one on that box but it will still make good boost

just set it to what ever rpm you want, inpadd to .5, inptim -15 and that should get you started

Pantera EFI · Joined: 12 Feb 2005 Posts: 1268 Location: So. California

Yes, I agree the MT site is VERY miss-leading as my information found shows the LT-10 section with LT-8 wiring diagrams.
Then, the picture shows the X-4 "ignition enhancer" sold with the LT-10.

The more informed friends you have found here must have the correct answer proven with proper field experience.

The dwell Duty Cycle is IMPORTANT, start with the 2.5ms dwell, work at higher settings (3+ms) ONLY when required.
A 100% Duty Cycle will "fry" the IGN-1A coil, or any other coil.

What will be the Max RPM of your engine ?

The Secondary Ground should go to the SAME rotor housing as that housings coils.
Please use a Silicon Dielectric grease on the boots.

Lance

tony94s4 · Joined: 15 Apr 2010 Posts: 16

10sec_rx7,
looks like if I need to add .5 fuel it is ignition cut, I like that,
have frind of mine with older MT and his is fuel cut,

Lance,
I plan to rev no more than 9k and I need to take it easy with the dwel
on the MT It has only one setting, u can't build a table with boost or rpm dwell control,

on my x4 with bosch coils I cranked my dwell from 3.5 to 4.75 it cleaned up and gained almost 20whp but fried the x4 shortly after that

by the way what kind of plug gap should should I run with IGN-1A,
and Icurently use ngk non resistor plugs can I do that with the new setup or should I use other plugs, what do you guys recomend?

10sec_rx7 · Joined: 27 Feb 2005 Posts: 379 Location: Sydney Australia

4.75ms is too much for the X4.. 4ms is max i would ever run...

depending on the boost i use anything from B9EGV to r6725-115

most street cars with 15-20psi B10EGV will be ok

C. Ludwig · Joined: 29 Sep 2006 Posts: 244

We've had better luck with the R6725 and R7420s than any of the other plugs. We have a daily driven street car running R6725-11 with the IGN-1A coils with zero fouling issues. With a proper tune there are no fouling issues. More expensive sure, but they work very well. With the 6725 and 7420s you'll want to run the gap they ship with. It's easy to damage the precious metal tip trying to regap them.

Let us know how everything works out with the new coils.
_________________
Haltech, AEM, Apexi PFC Sales, Installation, Tuning
Custom Harness Solutions
www.ludwigmotorsports.com

tony94s4 · Joined: 15 Apr 2010 Posts: 16

great,
need some more help,
where do I hook the pin b. est low, ttl gnd?

C. Ludwig · Joined: 29 Sep 2006 Posts: 244

A - Trigger
B - ECU Ground
C - Rotor Housing Ground
D - Battery Negative Terminal
E - Switched 12V+
_________________
Haltech, AEM, Apexi PFC Sales, Installation, Tuning
Custom Harness Solutions
www.ludwigmotorsports.com

tony94s4 · Joined: 15 Apr 2010 Posts: 16

spark plugs I got
set of stock to brake in and tune the engine,
and
set of ngk's
trailing r6725-115,
leading r6725-105 and two br10eix I am going to compare the leading
on the dyno,

I am waiting for the engine balance so I can put it back togeather
and will report if I will be able to get the coils to work

thnx for all ur help guys

tony94s4 · Joined: 15 Apr 2010 Posts: 16

she is alive:)

I hooked the IGN-1A Race Coils straight from mt without the x4 box
and the car fired up with no problem's.

I did hook the leading only for test with 2 light guage jumper wires for ground on each coil and it still gives powerfull spark,

idled the car for over 30min with 3ms dwel 3.5ms pump dwel and coils
didn't warm up at all, the mt was cool too,

I will fab some brackets, get all the wiring right and give it a try on the dyno,
by the way the car is idleing with 4injectors hooked paralel on primaries 2x1000cc & 2x1200cc and @ 7psi the secondaries 2x1600s should come on

heres couple links
thnx for all your help guys

http://www.youtube.com/user/mammamiagrill#p/a/u/2/Ni_nx4mbnk4

http://www.youtube.com/user/mammamiagrill#p/a/u/1/RiAexhyGNKk

http://www.youtube.com/user/mammamiagrill#p/a/u/0/SJckyB-xATc

Pantera EFI · Joined: 12 Feb 2005 Posts: 1268 Location: So. California

Hi Tony, after "run-in" would you like to try my method of fueling ?

To do so, you would need FOUR Primary fuel injectors of equal size/FOUR independent Injector Channels or a total of SIX Injector Channels with your TWO "staged " Secondaries.

Now, set your "primary" injectors to fire at OPPOSITE times in the cycle (every 720 degrees each).
Start with double the PW of your last fuel injector setting.

You will find 1/2 the Idle Fuel is available with the same volume when Duty Cycle is HIGH.

Lance

tony94s4 · Joined: 15 Apr 2010 Posts: 16

sounds good but with mt I have only 4 chanels all togeather with the secondaries,

I have couple aem 1050 boxes laying around I am going to try one of them in the next few days if I can get it to run with fd crank and cam pick up,

if it will work I wil make a new harness an run more chanels,
its great if I can get half of the fuel on idle, wife allready not happy every morning I start the car the whole house smels like e85

thnx Lance