JoshRx5

Hi all, hopefully this isn't frowned upon but pretty sure im only allowed to post in here and I can't find the details elsewhere.

I want to run the series 2 renny injector setup with my ecu so I can run fully sequential injection instead of semi sequential with the 6 injectors as standard on the s1 231 engine.

Im getting some injector bungs made up but my question is that are there any internal differences? Angle of injector holes or something that might make buying the s2 a better idea.

That and finding someone willing to sell a s2 inlet separately for a sum considerably closer to getting 2 injector bungs made up is impossible.

wcs

iTrader: (2)

I can't answer your question, sorry.

Why would you want to do this?
Sounds like a lot of work to solve what problem?
And ... the Series 1 injectors aren't sequential?

Maybe I'm not understanding what the difference is between Full and Semi (?)

And yes posted in the only spot available until you have been here long enuf and have enuf posts (or something to this effect)

Maybe find something here ..
https://www.rx8club.com/series-ii-te...n-done-222458/

9krpmrx8

iTrader: (46)

You would need the S2 upper intake manifold and the S2 lower intake manifold and then you would have to pull the engine to install the lower intake manifold and then modify the wiring harness in order to run the S2 injectors and then tune the ECU so that the car could run.

And all this for what reason?

JoshRx5

Sorry guys I forget im not on my blog sometimes and assume people know my project haha.

Okay so I have a series ii renesis going into my mk1 mx5. I bought the engine with the series ii upper inlet but a series i lower (they quite happily bolt together so im assuming the lower casting is physically the same). My adaptronic ECU has a limited number of AUX outputs for injection, so If I want to run the staged injection as per the series I renesis I have to loose an output otherwise I can only run semi-sequential with 2 of the injectors firing in a batch.

The upper inlet im running is custom, stainless manifold running individual throttle bodies so that's not a worry.

I have got a set of series ii injectors (they were fitted into the series I manifold I got so not sure where the series ii manifold is) so my plan is to run the higher cc series ii injectors in the series I manifold so I don't have to lose an AUX output to run the 6 injectors correctly, I only have to worry about running 4.

I'll also be running wasted spark so that I can free up an aux output to use to design/run a 2 stroke injection controller as per the EOMP fitted to the series I.

So my question is are there any differences in the manifold besides the injector holes?

9krpmrx8

iTrader: (46)

I can look when I get home but they should be the same except for the injector holes.

JoshRx5

If you could confirm that would be spot on! Need to get some info about the series ii oil injection system too once I've got access to the technical sections.

Loki

iTrader: (1)

Side note regarding wasted spark: you're effectively doubling the fire rate of each coil if you do that, so you could start running into limitatof what a coil can deliver. Say you fire both leading plugs together whenever either of them needs to fire, that's 6 times per rotor rpm, so twice per crank rpm, so 18,000/min at redline, so 300 times per second. So you have about 3ms between discharges. If my math is right, may want to think this over

JoshRx5

Loki cheer for the input, it's something I've already got covered. I've spoken to Andy at adaptronic about it and there's plenty of reading to digest too. As im running an aftermarket ecu I have to use coils with build in igniters and will be going COP using coils with a dwell time of 2.8ms so I should be fine. I have read that you can't run the trailing spark plug wasted spark anyway only the leading plug can be, but as I only need to free up 1 AUX output im all good.