I'm in the process of working out some electric 6th port magic (based on the RotaryResurrection electric 6th port page), and was considering tying the starter signal into the actuator so the ports are actuated during starting in an RX-8 style "Keep 'em freed up" procedure.

Will this cause any starting problems? They would snap open during cranking, and closed upon release of the starter. I don't *think* it would cause issues, but I thought I'd check.

-=Russ=-

 

no it won't cause starting problem. The engine isn't seeing more air with them open. Its still limited buy the throttle body. Actually thats a damn good idea!

 

If I get the whole arrangement working properly, I might sell kits or such. And I'll almost certainly do a writeup on it.

I just have to get stuff working first.

-=Russ=-

 

there might be a decrease in air velocity with them open which could I guess in theory make it a little harder to start as well as the longer duration bleeding off a pressure for the combustion proccess. but don't know how much of a differenc that could make

 

My 5th and 6th ports are wired open and she starts up fine.

 

^ I'm sorry, sucks to have no low end.

 

^ Indeed. First and second gear ratio's altered to counter that heh... Previous owner did it. Point is though it still starts fine

 

That's kind of what I was looking for. Thanks! I've played with opening mine manually during idle, and it doesn't seem to affect anything (RPM surges for a second or so, then settles back in), so I didn't think it would affect starting, but it's good to hear that people have no problems with it.

-=Russ=-

 

Are yourunning a modified 1st gen or 2nd gen tranny?

 

That's a good question? I've only had this car for 3 months and am working it all out myself... Whats is the difference between a 1st and 2nd gen tranny, anything I can check? I'm happy to, good to learn

Would it not have to be a 2nd gen to match the engine?

Cheers and sorry for hijacking the thread a bit, but you do have your answer

 

1st gen and 2nd gen n/a 5spds are about the same. I'm finding it hard to believe anyone would bother changing the gear ratios. Unless they are miata gears, I think somoene would pay out the *** for custom gears... Not to mention it takes more than standard tools to swap the gears out, which means unless he owns his own shop, he wouldn't have done it. And if he did have his own shop, he surely wouldn't have just wired the things open, he would have properly fixed them. :/

 

The ratios have been changed, Below 3000rpm it is pretty shocking, but once your past there, BAM your at the redline in no time.

The valves for 5th and 6th have been removed, and where the actuators are meant to be, it's all welded up.. Nice job eh.. Added bonus, they welded the UIM to LIM.

Dont believe me ? :P

 

Who the hell would take the time to weld Mazda's unobtani-aluminum.. damn Alright, maybe you've got me, heh.

 

Um... there are easier ways to fix a vacuum leak... Though I guess their method is pretty much forever. Who *really* needs to separate the UIM & LIM anyway?

-=Russ=-

 

The only problem I have with it is getting to my primary injectors... Other than that, It's pretty fine.

PS. What is that plate bolted onto the LIM (lower left corner of the pic above) ?

Cheers

 

Air control valve blockoff plate. Controls (controlled) airflow from the air pump into the exhaust system.

-=Russ=-

 

Ahh! cheers Russ !

 

http://www.16paws.com/rx7/index.html

That's some tranny's so you'll know which you have.

 

It's a tough one. It could be an FC... I reckon it would be likely, but I haven't taken my tranny out so only know what it looks like from underneath..