On my current setup I have been getting some light ignition breakup on the top end. The car has pretty much every bolt on as well as a ported motor running non sequential turbos at 14 psi on a PFC.

I'm running the stock coils with 10mm Magnecore wires and 9's all the way around. I really don't want to have to buy a twin power and I'm wondering if there is anything else I can do to help my ignition. B10EGV's? NGK race plugs? FC leading coils? Any sudgestions would be great.

 

Really an ignition module such as the Twin Power is what you will need to remedy that breakup, or run lower boost.

 

Why would you not want to buy a twin power? It pays for itself in the long run. It's one of my absolute favorite mods, and that's saying something

 

I was wondering the same thing. I just replaced my coils and ignition harness and still get just a little bit of breakup up-top if I run more than 12.5 boost. I guess I have to get a twin power too

 

Mike, you sprung for all three coils new? ouch. Even I havent done that.

 

I agree with Rich, there is no reason not to get a twin power or simal ign amp. You will need something along those lines if you ever plan to run more boost or go single.

 

The first (and inexpensive) thing you could do is put in a type of plug that allows you to run a reduced gap to keep the firing voltage requirement at a reasonable level--and don't run colder plugs than you need for your setup. 9's leading, 10's in the trailing may be appropriate.

(Be sure your AFR's aren't excessively rich and/or that your not drowning it with water if you're using AI.)

If it were my choice, I'd put an MSD 6A on the leading coil and use wide surface-gap BUR9's (leading) which will make a good combination. The advantage of the multi-spark is that the car will have improved low end and sharper throttle response, especially on ported or high overlap motors.

 

Twin power is the first mod I did myself. It was easy as pie to install, inexpensive, and fixed my ignition break up. I would do it again in a heart beat.

 

haha thats because you're too busy with JDM windshield wiper fluid tanks.

 

You can always try the B9egv's. They are inexpensive enough. The materials used for the electrode are great for conducting and will result in a hotter spark with the same amount of current applied. Unfortunately the material used also doesn't withstand heat as well so you'll be replacing plugs more often.

If you're thinking about going with NGK race plugs the 7420's are the only one's to get. Great plug designed for a hotter spark and better life. Greddy has the exact plug just rebadged for close to half the price so find the greddy's. Cost is around $115- $135 a set for the greddy's.

If you had an amp I would say go all 10's, but since you don't you might need to go 9's to keep them clean.

 

Yeah, with these cars, what's a couple hundred bucks I had so much $$$ momentum on the car lately (water pump, broken water temp sensor, chrewed up belt, emissions crap, cat converter, 2nd oil cooler) I figured, fugg it, just get them. FYI, the coils were $149.28 each from Ray (the list price is @$236.96). Both my old trailing coils were a little out of spec according to the FSM, and I didn't want to replace just those, since who knows when the leading one would die. The car feels great, a hell of a lot better than before!!

 

Thanks for the help. I was thinking of trying B10EGV's all the way around. Any reason why this might be a bad idea?

Also, after the last time the motor blew I removed the OMP and switched to premix. Would premixing cause this break up?

 

[QUOTE=If it were my choice, I'd put an MSD 6A on the leading coil and use wide surface-gap BUR9's (leading) which will make a good combination. The advantage of the multi-spark is that the car will have improved low end and sharper throttle response, especially on ported or high overlap motors.[/QUOTE]

How do you hook up one MSD 6A to both leading coils? Wouldn't you need to MSD boxes?

 

Leading coil fires 2 plugs, so only 1 MSD box.

 

Ok, so I changed all my plugs to B10EGV's and it cured the problem. The car is so much better in all aspects.

 

Glad to hear it. If you have trouble with them wearing quickly you should look into the greddy race plugs. (re-badged ngk r7420's)

 

I had the same problem with all my mods. It was more or less like the engne sputtered in the higher rpm band. I put the hks twin power in an wala it runs like a dream, idles better too.

 

While I've got everyones attention I was wondering if you can run a MSD 6a on resister-less plugs like B10EGV's. I know you can't on the twin power but how about the MSD?

Also if you are running a MSD box what plugs are you running?

 

Yes, either resistor or non-resistor plugs are fine with the MSD6A.

You can run pretty much any plug with the MSD, but they will wear somewhat quicker.

Advantages of using the box include running a slightly colder plug without fouling and the ability to use a slightly larger gap, which improves idle and drive-ability.