Jeezus

iTrader: (4)

ok, YES I searched my butt off, and everything I read so far seems like it doesnt apply to my car

trying to find the secondaries arm, cant find it, so I look for the 2 10mm bolts that are on the back passenger side of the carb... maybe I'm blind but I cannot see them..

also searched for pictures, but the threads are so old that I guess they got erased.

could someone circle where I can find these things at? or how to do it?

Please help me!

82transam

iTrader: (18)

Neither pic shows exactly what you need, but I've attached one of the pics with some labels. It shows the vaccum actuator for the secondaires on the front of the carb, follow its linkage and you'll see where it goes, you can then look in the back (where my arrow is) and find the other end of the secondary rod (whatever you wanna call it) if you get a pic of where the arrow is pointing we can tell you more accuratly, in those pics the linkages are all hidden.

Jeezus

iTrader: (4)

Thanks! now another question, the green wire is sopposted to hook up to the secondary jet (I believe) here in the pic, but it has came out. what does this wire do, and how can i hook it back up?

Jeezus

iTrader: (4)

Here is the best i can do at the angle..

Jeezus

iTrader: (4)

https://www.rx7club.com/showthread.p...daries+picture


wired them open like in the pictures, but it never moved, help?

GSL12a85

I tried the same thing with the wiring, but I decided I'd rather have the vacuum secondaries.. speaking of those.. is there a hose? or should it automatically work

1badFB

iTrader: (1)

This is what you wire together:


I hope thats what you were wondering and hopefully this will help!

Jeezus

iTrader: (4)

yep! wired them together! I just have to figure out how to run a little leaner...

cdrad51

What do you mean by that?

Jeezus

iTrader: (4)

My muffler never exploded until i had this done :p

I do not want to lean it out much, maybe (if i am thinking right, screw?) 1/8 to 1/4 a turn

82transam

iTrader: (18)

I wouldn't adjust it much if any to compensate for this mod, its just one of the possible side effects, I'd live with it, rotaries are known to backfire, now you're one of them

GSL12A85: the vaccum actuator gets its vaccum from the carb internally, no hoses run to it, so unless the little gasket on the back of it is bad it should just work.

cdrad51

Well, first of all, and assuming that you are talking about the mix screw, that only affects idle mixture. Second, I suggest you modify the way you mash the pedal. Now that you have mech secondaries, when they open is under your control, so if you floor it before the engine is at around 4k rpms minimumly, you'll get undesired effects.

Jeezus

iTrader: (4)

i never floor it unless i am above that RPM, my muffler went kablooey cause it sucks anyways :p

cdrad51

That we agree on. Get an RB or something.

82transam

iTrader: (18)

The screw affects what the carb is doing anytime your not on the throttle, typically at idle, but if you let off the gas its setting takes effect then as well. Still though I wouldn't adjust it just for this mod...

Jeezus

iTrader: (4)

Ok, so I am getting the RB muffler then...

would the header/RB muffler need the rats nest removed? I hope its just a removal, and not remove and add extra parts minus the vacuum caps.

cdrad51

the screw affects the idle circuit, i.e. below 2k rpm. Not when one lets off the gas. Very different.

cdrad51

RB muffler doesn't need the rats nest removed. Header doesn't either, strictly talking. It dependes if you plan to put a cat after the header. Then you'll still need emissions. Otherwise you can get rid of the rats nest.

82transam

iTrader: (18)

I run a RB header and muffler with a cat and rats nest, works fine.
cdrad51, are you sure about that? I used to think that it only affected it at idle, but i was playing around with my carb a while back, I richened it up quite a bit, and when I'd rev it the engine wouldn't immediatly drop off, whereas when I'd lean it out and rev it the rpm's dropped much faster. Its no coincidence, because I can replicate the results very easily...

vxturboxv

iTrader: (2)

If your not flooring you car unless your above 4k rpm then having this mod isn't going to improve performance at all. It's just going to increase your gas bill. I'd undo the wire and use the vac's. Your not gaining anything.

cdrad51

Study this and draw your own conclusions.

http://www.wankel.net/~krwright/file...01979-1985.pdf

Jeezus

iTrader: (4)

But when I use the vacs, I dont feel the oomph, per say, as I do when the mechs are working. I have a whole mess of wires that just hang off the passenger./secondary side of the carb.

1badFB

iTrader: (1)

This is because when you let off the gas the throttle plates close, the bulk of the fuel that is being supplied is coming from the idle circuit. Tune the idle circuit differently and the way the carb acts when the throttle plates are closed changes.
When you are accelerating, however the fuel load is transfered to the main circuit and then that becomes the main source of fuel. The idle adjustments shouldnt change this because they rely more on vacuum than air velocity (like the main circuit).

82transam

iTrader: (18)

Isn't that what I said? If I wasn't clear that is what I meant, any time you are no on the gas the idle circuit is controlling the amount of fuel that enters the carb...

On a side note I don't really like the mechanical secondaries. I did at first but ended up switching back to vaccum after about a year.

vxturboxv

iTrader: (2)

I still have the umph when I floor it. U probably have a worn diaphragm on your secondary actuator. Or the gasket around the vac source that controls the vac carb diaphragm is leaking.

Try looking down into your carb while it's running and having a friend mash the gas. The secondaries should open instantly, if not you have problems.

Just seems strange to give up gas mileage and proper cruise A/F ratio's for a little kick that may last a tenth of a second.