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Split Fire Coils Are They As Good As Stated

GTR 400

By GTR 400,
in Engines & Forced Induction

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GTR 400 Enthusiast

GTR 400

Posted
Posted

Hi to all i just got my new Stage 2 Tomei poncams installed in my R32 gtr, with the adj cam gears, new iridium plugs gapped to 0.7,Sard 700cc injectors, split fire coils, and o44 pump with Apexi PF, etc etc tuned all together.

I seem to have a bad miss from about 5000rpm to 8000rpm its not over the complete range but random in this rev range, the split fires dont seem to be up to the task is there some way to amplify the spark delivery better because my spark plug gap is getting smaller all the time we cant open it up because of the miss on the dyno whilst tuning.

Very frustrating i heard in a previous old post that split fires are not as good as the originals is this true or does it happen that split fires do occasionaaly stuff up or might need to be amp up to get more spark, i am pushing 335Rwkw already and up but this is limiting me alot can anyone help please.

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

The Splitfires are upto the task. They are the same as stock coils, and they are good for over 400rwkw.

You obviously have another issue with wiring/voltage or something there.

So talk to your tuner/auto elec and go over it. Its a 15+yr old car and they are starting to have these types of problems

Munkyb0y Grand Master

Munkyb0y

Posted
Posted (edited)
The Splitfires are upto the task. They are the same as stock coils, and they are good for over 400rwkw.

i thought splitfires provide a 10% stronger spark.

have i got it wrong?

Edited by Munkyb0y
R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Who knows, no-one has really tested them back to back with brand new OEM coils (not 10yr old ones), and noted how much better they are.

I just say same as stock for the sake of the point im getting across is that he has other issues :(

13thracer Rising Star

13thracer

Posted
Posted

IGNITOR on its way out mine did the same thing with my splitfires swapped the ignitor with another one and problem solved FOR ME, anyway HKS have an ignition amp if you want to go that way i believe they have plug in adaptors for the kit now too. have a browse through nengun to get an idea on it :)

sly32 Proficient

sly32

Posted
Posted (edited)

i completely agree with the igniter been stuffed, split fires wont do that with you, also check that your exhuast (cat) isnt screwed, mine got screwed up and so i had no exhaust flow slowing the engine and causing a miss, thats my 2 parts

JV

Edited by sly32
sewid Grand Master

sewid

Posted
Posted
i thought splitfires provide a 10% stronger spark.

have i got it wrong?

I don't think anyone claims that.

The reason people go for splitfires is the price. They are half as expensive as new coils, bolt straight in and are brand new versus your 10+ year old coils.

noone Experienced

noone

Posted
Posted

Uras posted some powerfc settings on here somewhere with his preferred settings for splitfires as the saturation curve on the coils is different to stock ones.

Havn't tried these settings myself yet but am planning to when the oportunity arises, changes were to dwell vs rpm i think

link here

http://www.skylinesaustralia.com/forums/t1...p;hl=splitfires

GTR 400 Enthusiast

GTR 400

Posted
  • Author
Posted

Thanks guys i checked the cat we took it of and put a straight thru pipe ran it up and no change in power my cat is flowing, besides the miss , some say that maybe my cooler is a bottle neck i am running a JJR 100mm tube and fin with the standard rubber piping still.

I am going to check the wiring and see if the coils are getting the right amount of voltage for sure as this sucks i should be able to run more boost but cant.

Just curious can the split fire coils be amped anyway to increase the spark at all? not that they might need it but can it be done.

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