Sorry for the late reply, but I was trying to dig for more info on this...

Others have had great experience with the LSx coils.
I'm not a very big fan of them - I believe in bigger-is-better when it comes to coils.
(If we had the money, I'd go for MSD HVC series coils, but these are EXPENSIVE and also very bulky.)
We're trying to retrofit LSx (dunno which series) coils on our long-dormant 20B ourselves.

There was a great thread on the Evil Forum, but I can't find the thread right now using Google search.
It pointed to the EFI101.COM website, but I'm not getting good hit on there either.
All I remember was "mercury marine" coils - this search popped up a few hits on EFI101, but not the threads I was looking for...


-Ted

The MoTeC dealer that I bought my M820 from recomeended the LSx coils and thus far I have had zero problems with them. His rec came from using them on T-BIGMF'ers gulping meth and putting down damn near 1000hp. However, you need to be sure that whatever EMS you decide to run does not need wasted spark. The LSx coils require more dwell time than is allowed and like a healthy supply of juice.

As for the Mercury Marine coils............. being a MARINE GUY myself I can tell you there are two types, the I/O type and the outboard type. The I/O types are standard LS coils of some variety. The outboard coils I have seen two versions of, the 2-stroke and the 4-stroke. I would think the 4-stroke coils would be require to long of a dwell time and produce an average spark. The 2-stroke variants, well, obviously they have to be a much stouter coil.

FYI - Yamaha builds a number of Merc engines. Best thing to do would be to contact Quicksilver directly and talk to them.



EDIT- QuickSilver being the parts division of Mercuy Marine... get it. QuickSilver, Mercury :rofl:

Just a little update..

Bought 3 NEW 13b housings

Also im working with a interchangeable intake that will work with a single plenum and ITB.

Ill try and get some solid models soon and discuss my approach to it as far as testing different setups etc.

Ouch :rofl:

Sounds like it'll be a sweet setup when it's done though. :icon_tup: I'm interested in this intake idea.

Hey Charlie, have you seen these...

http://www.tweakit.net/shop/product_...roducts_id=118

price is not too bad....

$1,200 shipped. Not bad at all.

Charlie... Welcome to the growing group of 20b NA guys! Great build you have going.

Couple of things. Generally, you should just go with whatever EMS your builder is most comfortable with and ignore most of the flack. However, I would echo most of what RETed said comparing the Tec and Haltech systems. I like the e6k a lot and really liked the ignition flexibility, since I used several different trigger setups (back in the day). I would add that with an NA motor, many of the functions both TEC and Haltech provide are a bit less critical than with the turbo motors. I use a Microtech and it works just fine.

On ignitions. Again, I agree with RETed that CDI is a benefit. CDI only runs generally from 0-3,000 rpm, but the mutliple, stronger sparks burn much better than inductive setups or stock. Plus, if you go MSD, which is my preferred ignition, they (I think) are still the only true digital system and the firing is very precise at high rpm.

On coils. Bigger is better. The MSD Blaster series are reasonably priced on sale especially and do a great job. Output is very high and the rise times are very quick. Since the NA motor will rev to 10,000 rpm if balanced right and with no worries, you need the fastest rise times you can get. MSD's run very cool at high rpms.

Carry on...

Gordon

Thanks for posting Gordon, your car was the inspiration for this build..

As far as updates..I have none.

The engine will be back by the end of the month. I have all the CAD work done for the motor mount brackets and mounts. I planned on using 1/8 steel plate but decided to go with 1/4 aluminum for corrosion resistance, etc. They will be plenty beefy and will get the job done. I will have some pictures of them when they are done.

Charlie... Any update?

Gordon

just out of curiosity, how much will this build cost you? i was talking to dave at KDRotary in PA, idk if you guys know him or not, but for the rx8 he said its roughly anywhere between $20 - $25 grand.