After getting all the fuel system complete on the GTR. The car went on to the Dyna Pack at TDI’s in Lakeside to see what the power output would be.
After a few runs the car was misfiring above 1.6 bar, we took the spark plugs out and inspected the Splitfire coil packs and they look practically brand new.
At first I thought it was down to the voltage draw from the two extra Bosch 044′s in the boot of the car (which incidentally make some serious noise!) but it wasn’t. So the voltage was checked and it was operating within safe margins it didn’t drop below 12v.The Splitfires are actually able to fire on really low voltage e.g. 10v which is good for cold starts and the GTR which only gets driven on occasion.
So I’ve been looking into many alternative options for my GTR. With anything if it fails I do as much research as possible to find out why it has failed and look at ways of upgrading it so it doesn’t fail again. We are planning on fitting Nitrous on the GTR to help with its serious amounts of lag which is frustrating but as soon as the Turbo comes all is forgiven!
Project GTST looks like it runs standard coilpacks with an ignition amplifier (according to the spec list) and the r33 GTR by Sumo Power runs a bespoke Do-Luck ignition system which has 6 individual coil packs located above the inlet cam overs. I will try and find the pictures. Doing my research I haven’t found people are running similar power upgrades to me so I’m on my own.
So far what I’ve discovered is that I have 3 potential routes right now
- Replace the splitfires with splitfires – easy option about £400
- Use LS1 coilpacks and two bosch igniters from an Audi TT – This is a TDI special cocktail – £???
- Use an uprated coil pack e.g. MSD ignitions or Accel
I’m favouring option 3 at the moment and continuing to do research. Accel have some serious gear fox example~:
This works out to £43 a coil but they are seriously big coilpacks so I need somethng a little smaller. The above is designed to power all 6-8 cylinders not just one cylinder so probably on the excessive side!
I’ll update this post when I make a final decision but if you’ve had any experience with a serious ignition coil pack upgrade feel free to comment.
