Mazdatrix told you that because they know there's not much you can do about it. If a guy is willing to run a stock carb on a ported motor, what do you tell him? "Buy a bigger carb?". They're not going to tell you how to do the job half way. The do carry bigger jets, but probably nothing that will be of much use to you.

The accelerator pump pumps gas into the primary barrels when you step on the gas. It feeds the engine the extra fuel required when the butterflies open up but the main fuel jets still havent caught up. If it's failing, the car will stumble when you quickly give it gas. If it's failed, the car will downright stall when you give it gas. Increasing its displacement will spit more gas into the carb every time you press the throttle... this will help your lean situation durring on/off throttle transitions, but it wont do anything for the overall lean running of your carb. It's located on the drivers side lower right corner of the carb. A shop manual would help you out with this...

 

It doesn't stumble when I floor it, it just doesn't go like it should. Is it worth rebuilding it, or should I just look into getting an upgrade?

 

For a couple extra 100$ you can get a proper carb for your car. I'd do that .

 

Would a YAW carb be the proper one?

 

That would be your cheapest option. Either that or search the net for a 12A moded Dellorto, Weber or Holley.

 

something like these dual Webers for $275?

 

That would work!... IF you can ever get them dialed in properly. Doesnt that look aswesome? Compare the look of that to a Nikki...

 

Well, the Webers are sweet but who the hell cobbled up that manifold and spacers? It's an aesthetic nightmare! If they didn't bother to smooth out the obvious imperfections on the outside prior to final casting, then what do the actual internal runners look like that can't be seen easily?? I'd sit down with an air grinder to knock it down and remove excess metal and then poish it if it's aluminum or powder-coat if it's cast iron before it graced my engine bay...what is the definition of a proper carb, by the way? Still emissions capable or modded for ITA duty?

 

How would these duals compare to that of a YAW Nikki?

 

Or even one of your carbs, RXcetera?

 

My Carbs? You mean one of my Dellorto's? I would take the Dellorto over that for sure, but that's just because I've heard those duals can be a nightmare to dial in.

I supposed that Weber is vaguely comparable to a Yaw. I mean... they acheive the same results albeit very differently.

 

No, no... I meant one of your worked Nikkis.

 

Oh, sorry. For driveability and reliability, Nikki all the way. For more power, more tunning and unreliability go for the Duals.

Honestly Jimmy, you need something bigger than what I can provide you for your streetport (when it comes to Nikki's anyway). Yaw might be able to help you, but if you dont want to wait, look around for an aftermarket carb.

 

What would I have to do with the above pictured dual Webers to install on my car? I think I see the linkage, but I could be wrong. I definitely would remove the spacers.

 

There's nothing wrong with the spacers (other than they look like crap). A longer intake tract lowers at what rpm the power comes on. That manifold is really short so you'll need spacers to make power below 8,000 rpm lol.

 

who made this manifold and the spacers?i didnt know you could take two carbs and slap them together like that on a rx7,i tought you could only use sidedrafts?**** i might get one of those manifolds with some spacers and go with some dual 48's

 

I asked the seller and he said it was on an 83 when he bought it.

 

What kind of Webers are those anyway? Never seen em before.

 

36 DCD's or something like that?

 

 

RXcetra. 150bhp seems high for a stock untuned carb with just exhaust side mods. Most tuners are lucky to get 130. Paul Yaw with full carb mods is only getting high 150s.

Is there a similar relationship to Canadian hp as is to the dollar?

 

Dual 48's? That would be a total waste of time and money. Way too much carb.

 

RXcetra having reread the thread, apologies for my last post. I agree with you that a streetport will get you 150hp chocking on a stock carb. I had in my mind SP as the original quote meant stock port not street port which I used to know as extended port and covered a range of port openings up to bridging.