coils

[RICE RACING]

Originally Posted by mattallac

rice racing my question is the second jen turbo came with inductive coils why didnt they use a cdi ,i do understand electrical theory and yes a cdi can magnify spark or a msd 6a box will multi spark (only to 3k) .i have ran my old repu on the dyno for testing with and without 6a boxes and there was no hp difference .that was a streetport 13b ,holly 600 ,road race header with dual 2" ,166hp to rear wheels at 7500 rpm.now as for turbo application on a rotary i have not tried a cdi yet. with the stock coils on my rx2 i am at 347 hpp on a mustang dyno at 10 psi.7500 rpm.aem coil is 118 mj ,up to 3.2ms

CDI costs money, Inductive is cheap, that is why OEM dont use it from factory. Look at the factory LeMans winner, you will find CDI on it

If its ported, or running boosted at good power CDI is a no brainer really.....
I have a video of stock std 13B S5 engine block here I ran 10 to 15 years ago > http://www.riceracing.com.au/water-injection.htm
S5 video > 440rwhp down bottom of page.
You cant do this on inductive with 11 heat range plugs and a true daily driven car, I have had people try all types even with inductive boosters and much higher primary voltage to coils and it just flat out does not ever work as well as any decent CDI system.

One thing you will NEVER see on a good CDI set up is people changing spark plugs to warm up a race engine lol, you wont see people changing plugs cause they are fouled either on true road cars, you also will never see doctored "tunes" cause of misfire limitations imposed by a fundamental lack of secondary voltage or poor spark "type" characteristics (dont worry about token energy ratings some spurt out)......... CDI suits rotary engines end of story.

The bike CDI's are actually some of the most reliable, so are some of the marine version too. I pioneered the use of dynatek systems for rotaries and many across the world have copied my lead on that. Cheap, compact, powerful and reliable with no limits as I have described above at length.

Its a free world chose what you want @ the end of the day, just passing on what most would not care to tell forum people