EA82 Electronic dizzy coil to GT40R??

subalex · Post by **subalex** » Mon Apr 09, 2007 3:46 pm

I've taken a Bosch GT40R ignition coil off an L-series some time ago when I saw it - I had some messages going around in my mind at the time suggesting that this would make a good improvement in power over standard coils. However, I've since spoken to an auto electrician and they said that since mine ('91 model) has an electronic dizzy (no points) then it won't make a little bit of difference.

What's the final word out there? Is that right or has anyone with an electronic dizzy found this to be false?

Alex

BaronVonChickenPants · Post by **BaronVonChickenPants** » Mon Apr 09, 2007 11:52 pm

The GT40R is under rated for an electronic dizzy, MSD Blaster 2 is what you want.

Jordan.

subalex · Post by **subalex** » Tue Apr 10, 2007 5:42 pm

Thanks for the reply Jordan.

It begs the question though. Will the outlay of another $80 (on E-bay) for an MSD Blaster 2 provide a noticeable difference in takeoff from idle? That, with 27" tyres, is mostly what I'm after... along with better power when going up a hill with the car loaded up.

Alex

fredsub · Post by **fredsub** » Tue Apr 10, 2007 7:19 pm

well....its typically said theres a few % gain.......
not sure if this relates to you, but with a turbo (eg ea82t) it allows upping the fuel curve (aka aftermarket ecu) for more fuel/boost without snuffing it out! so that really does give more power.......but also the coil really needs to be driven with a cdi to get these results.
How this may relate to a carby....don't really know, but maybe weber etc, more fuel (probably stuff your economy tho)....others may answer better...

subalex · Post by **subalex** » Tue Apr 10, 2007 10:26 pm

Hmmm... no mine's not a turbo. I'm still running the strock Hitachi carbi EA82.

I've been VERY close to doing the EJ20 conversion but changed my mind. I'd rather get the most out of the stock engine and, if needed, change it over to the spare one I have here with half the mileage.

I've also read so many of those threads about the best mods to get the most power. I've got a larger exhaust system that needs adjusting for the 3" lift. I've even got an airbox and snorkus from an MPFI EA82 that might allow better air flow. The best thing for me at moment is to improve the air/fuel/spark mixture to get better and smoother power from standing starts. I need to get the carby tuned properly too so if the increased spark will add to the whole mixture and settings then I'll fit that first.

It seems that the advice here is not to bother with the Bosch GT40R coil so that brings me back to the question of, ok, is this worth the effort anyway? Anyone gone step by step here and found reasonable gains? If not, then the 'handbrake' wins and I'll leave it alone.

Alex

BaronVonChickenPants · Post by **BaronVonChickenPants** » Tue Apr 10, 2007 11:42 pm

The exhuast can be one of the most expensive upgrades and you've already got that, all thats really left is:

Adding the MSD Blaster ~$80
Enlarging your spark gap $0
Advancing your timing to ~12 BTDC $0
Make sure you use 98 octane fuel (with ethanol for a squidge more power at the sacrifice of economy) $0
Do the wire mod to your hitachi and possibly revuild and rejet it ~$20-40
OR replace it with a weber ~$50-100

The first 4 there basically all go together, they either wont work or you wont really get an advantage from them with out doing the blaster first.

Personally I wouldn't waste anymore time or money than that trying to get more power from any EA series engine, if this doesn't cut it it's EJ time.

Jordan.