Jump to content
SAU Community

Ignition coil upgrade

NotGTR

By NotGTR,
in Engines & Forced Induction

 Share

Recommended Posts

NotGTR Rookie

NotGTR

Posted
Posted

Hi all. Think I am having issues with the ignition system on my R34 GT-T. It has Splitfire coils but I am pretty sure I am having ignition breakdown on one of them once the boost goes past 14-15psi. I had the exact same problem in my old R33 and that was later tracked down to the factory ignition coils. Car drives really good and even on partial throttle it will pull quite well but as soon as the boost starts to climb, the engine note changes and the power drops off massively with almost jerking hesitation. It will still rev out (I only went up to 5K) but you can tell it just hated it. 

I inspected the ignition coils and two of them look to be much newer looking than the other four. Just cleaner looking and the blue colour is much brighter. I am pretty sure someone has been in here before and maybe changed a couple of failed coils. Spark plugs all looked pretty much the same. Couldn't see any difference there.

For the guys with tuning experience, would I be ok getting the R35 ignition coil kit and just fitting it in there. I don't want to mess about with the Splitfire ones any more. Could I drive it like that without adjusting dwell settings? If that isn't a good idea could I at least drive it to a tuner with R35 coils fitted? I have bigger plans for the car down the line but currently it is tuned for just under 300kw on e85 with GT3071R pushing 20psi. I want 400kw down the track so an engine rebuild and turbo upgrade will be in the pipeline. I just want the car to run to its full potential for the moment.

Sorry for the long post guys but just wanted to give as much info as possible so that you can give me the right advice. Thanks for any help.

Link to comment
https://www.sau.com.au/forums/topic/482607-ignition-coil-upgrade/
Share on other sites
BK Grand Master

BK

Posted
Posted
On 08/07/2021 at 9:27 PM, NotGTR said:

would I be ok getting the R35 ignition coil kit and just fitting it in there. I don't want to mess about with the Splitfire ones any more. Could I drive it like that without adjusting dwell settings

Yes, not a problem. The dwell time for standard RB coilpacks is lower (shorter charge time) than what the R35 coilpack saturation point is. This just means if you leave it at stock dwell you're not getting the full energy potential from the R35 coilpack. Even so, the R35 coils at stock RB dwell times still massively outperform the stock or Splitfire RB coilpacks anyway.

Just get them and whack 'em in, money well spent 👍

  • Like 1
NotGTR Rookie

NotGTR

Posted
  • Author
Posted
On 08/07/2021 at 10:57 PM, BK said:

Yes, not a problem. The dwell time for standard RB coilpacks is lower (shorter charge time) than what the R35 coilpack saturation point is. This just means if you leave it at stock dwell you're not getting the full energy potential from the R35 coilpack. Even so, the R35 coils at stock RB dwell times still massively outperform the stock or Splitfire RB coilpacks anyway.

Just get them and whack 'em in, money well spent 👍

You're an absolute legend. Thanks bud. Dusting off the old credit card right now.

BK Grand Master

BK

Posted
Posted
On 09/07/2021 at 7:36 AM, joshuaho96 said:

You might be able to find those coils for cheaper by searching for Hitachi IGC0079, in the US RockAuto sells those coilpacks for 55 USD/73 AUD each. Not sure how to make sure you're getting a genuine coil though, there are counterfeits everywhere for these parts.

Its not hard, you buy from reputable resellers in Australia like Golebys, Just Jap or Kudos Motorsport. You could even order the coils direct from Nissan if really really worried and purchase the mounting / wiring separately.

The coils aren't the expensive part, it's only about half the price of the kits as the billet brackets and wiring harness make up the other half.

NotGTR Rookie

NotGTR

Posted
  • Author
Posted
On 09/07/2021 at 8:48 AM, BK said:

Its not hard, you buy from reputable resellers in Australia like Golebys, Just Jap or Kudos Motorsport. You could even order the coils direct from Nissan if really really worried and purchase the mounting / wiring separately.

The coils aren't the expensive part, it's only about half the price of the kits as the billet brackets and wiring harness make up the other half.

What about Godzilla Motorsports kit? They seem to be a fair bit cheaper than others. They also sell genuine R35 coils or they have an option of their own "high output" coils which they reckon output more energy than the OEM R35 coils. Even if that is the case the long term reliability would be worrying me. They want $900 for the genuine kit but which is fair whack cheaper than PRP kit from Golbey's. Which would you go with? It's only a money saving if it's just as good. If not then I much rather buy the PRP kit and be done with it. 

BK Grand Master

BK

Posted
Posted
On 09/07/2021 at 12:06 PM, NotGTR said:

What about Godzilla Motorsports kit? They seem to be a fair bit cheaper than others. They also sell genuine R35 coils or they have an option of their own "high output" coils which they reckon output more energy than the OEM R35 coils. Even if that is the case the long term reliability would be worrying me. They want $900 for the genuine kit but which is fair whack cheaper than PRP kit from Golbey's. Which would you go with? It's only a money saving if it's just as good. If not then I much rather buy the PRP kit and be done with it. 

Yep the were the first ones I seen selling them. I have the Godzilla motorsport kit on my blue 32 with the genuine unmodified Nissan coilpacks as I wanted the genuine coils. Full kit was about $1200 from memory for coilpacks, billet bracket and wiring harness.

NotGTR Rookie

NotGTR

Posted
  • Author
Posted
On 09/07/2021 at 12:43 PM, BK said:

Yep the were the first ones I seen selling them. I have the Godzilla motorsport kit on my blue 32 with the genuine unmodified Nissan coilpacks as I wanted the genuine coils. Full kit was about $1200 from memory for coilpacks, billet bracket and wiring harness.

Damn.......they have the genuine kit on special at the moment for $900. I should jump on that. My understanding is that the R34 Neo engine the R35 coils are direct plug in. No loom needed. Is that right?

Thanks man. You've been a huge help.

  • 2 years later...
  • 2 weeks later...
GTSBoy Grand Master

GTSBoy

Posted
Posted

I understand that the R34 ECU can be sensitive to what is going on wrt the coilpacks/loom. You'd be well advised to put a Consult reader onto the diagnostic port and read the codes. The one(s) in the ECU will be the ones most likely to tell you what's going on. The TCS light will be a secondary effect.

  • Like 1
joshuaho96 Veteran

joshuaho96

Posted
Posted
On 4/18/2024 at 11:47 PM, shortyboy said:

I just did the R35 coil pack conversion with Hitachi coils. Now I'm getting TCS, slip and cel lights on. Car runs great and better than before on factory coil packs. Has anyone else ran into this issue? 

Pull the codes. I have seen a code 21 for primary ignition circuit fault on these conversions for some reason, I'm not sure exactly how the ECU decides this either. 

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • cobo_11
      My BMW 335i

      By cobo_11 · Posted

      Noted. Have noticed BMW are more 'high maintenance' for sure. They've attracted my attention as I think the used car prices seem reasonable vs other options, and the extra quality overall vs a commodore / camry / corolla or similar of the same vintage is appealing, especially the interior, and they are more on the sporty side whereas the others mentioned can be more cruising or economical A-to-B only.
    • cobo_11
      My BMW 335i

      By cobo_11 · Posted

      Haha yeah I know, this is SAU after all, why are we talking about BMW's of all things!? I hear you on the 'don't have to worry about it' side of things. Having been fortunate enough to be have been able to buy a brand new motorbike or two...never really enjoyed them as much as I'd have liked as you worry so much about where you park it, will it get scratched, stolen, attempted theft, knocked over, etc...and yes dirty. Older less valuable bikes you can just go where you want and park it wherever and not really worry that much in comparison. And who cares if it gets dirty! Never owned a V8, and have had my eyes on VE / VF commodores for years but with their prices climbing so high, the M3 has come into focus more as prices are much closer than I've ever seen...is it a potential contender now?...of course need to factor in the S65 'maintenance' especially and like you said general M car 'tax'. One can dream anyway. But more on the reality front - did read the whole 330i thread as well and was a great read too, both threads enlightening as I've never even driven one of these cars! I do recall 330i didn't seem to have the same amount of issues for almost the same car (turbos and related differences notwithstanding)...perhaps down to getting it earlier in it's life so looked after better than the 335i? Perhaps so as your 130i has been good and quite similar, so finding a car that's been looked after well is the especially-crucial-BMW-first-step.
    • luke gtr
      So i brought a boat...

      By luke gtr · Posted

      Nice. Dont worry about the time of not running. My current skyline hasn't run since I bought it. About 8 years ago.
    • PranK
      My BMW 335i

      By PranK · Posted

      It's also worth noting that I am heavily and unconditionally biased. I've had a lot of cars including some GTRs a fair while ago. I love my BMW's now a lot. They make no sense a lot of the time and the guys on here remind me regularly that I could get something else that does what I want better and cheaper. If you're going to take on an older BMW it's definitely a commitment. If you bail on it early you'll lose money and also the ability for it to put a smile on your face. Stick with it and it just gets better.  f**k I should get into advertising.  
    • PranK
      My BMW 335i

      By PranK · Posted

      Careful with posts like that around here without the flame suit on @cobo_11! 😂😂 My 330i journal is on here too. That car was so good and super reliable. We still have a 130i in the family which is almost identical to the 330i and easier to find in manual. It has also been almost faultless over the 6 or so years in the family.  I used to want an M car a lot more than I do now but if I'm honest and without trying to sound like a wanker, I can get such good performance and handling out of my 335 without needing to worry about all the crap that goes along with M car ownership. I don't need to worry about my bearings or subframe issues or the cost of replacing brakes or suspension or whether it has been impeccably maintained. And I can leave it places and not get upset when it's always filthy.
×
×
  • Create New...