plentymoon

OK so I just recently bought my 1983 Mazda rx7 and I'm guessing about 110k original miles (cluster got swapped but I have the original) anyways I was thinkink about getting a new carb set up and get a racing beat manifold and making my own custom catless exhaust. Now before anyone ses a anything about emissions we don't test for that here in burley Idaho so I will be OK as long as I don't go to the bigger cities to live.

But can I do that and get the same performance as if I were to buy the from like racing beat? And what difference can I expect with racing beats carb setup on my 12a also still learning about carburetion so bare with me please.

CyByrd

Just get the bonez pipe from the rx7 club and be done with the cats. $90 to ur front door. Ezy pezy jap. Well u get the idea. It's greaaaaattttt man

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MosesX605

The rx7.com cat delete pipe is pretty good. It doesn't raise the noise level too much and is a relatively easy install. That being said, if you're prepared to spend some money, you can't really beat the RB street-port system for street usage. It's probably the best combination of performance and noise reduction you can buy.

If you're dead-set on rolling your own exhaust, I had good results with Borla mufflers. Decent noise reduction and a very bassy tone. Just expect to run a couple of silencers and a largish muffler to get the noise level down to acceptable levels.

Cookboy

iTrader: (10)

The cat delete pipe delivers 1/2 to 2/3 the benefit of the RB short primary system at 1/10 the cost. It's a great way to go, and you'll be very pleased.

If you get a hankering for more power down the line the long primary (which I've been procrastinating about installing) is the way to go. My current setup is an old RB road race header into an equally old and NLA RB collector/presilencer followed by a 2" magnaflow Magnapack into a 2.5" single in dual out borla muffler. Works well and sounds great, and was pretty cheap to cobble together over time.

I don't know your cash flow situation, but I'd go with the delete pipe for now, and enjoy driving. Edit: Stick with the Nikki! It's the best!

plentymoon

OK looked at the exhaust its not bad and the price is fair I will we what I can do cause this little car is peppy and I would love to see get up any go just a bit better

diabolical1

iTrader: (3)

i don't think it's necessarily difficult to match the power increases of the RB systems. i think the trick basically comes down to doing so while maintaining the same level of sound control and longevity. the RB systems are expensive, yes (perhaps excessively so), but they are worth it. i'm not trying to discourage your plan at all, i'm just giving you some points to consider.

as for getting a carbie, you should work with the Nikki for a while. it's tried, true and has tons of support here on the board. on stock ports, it's not really a limiting factor.

CyByrd

Dude peppy it will be. Better gas milage and engine runs a lot cooler. Best $90 I have ever invested. I could barely ****** 2nd and keep up with traffic. Now I catch 3rd and I pass traffic. Mine Luvs damn thing.

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plentymoon

Yeah I will try and purchase it on Monday when I get paid and get it installed after a work day.

Will be a lot easier to install things now since I finally have my own home built shop garage and not trying to do it in a dirt drive way

plentymoon

Also I should try and get some pictures of the car its in pretty good shape for the miles and still sounds like it should when it got brought off the lot new 😆

Jeff20B

iTrader: (13)

"Long Primary" is a search term I think you should really... use as a search term.

DivinDriver

iTrader: (15)

Exhaust upgrades are widely considered the first, best-bang-for-buck, easiest bolt-on HP for a stock rotary... and it really melts my cheese that I can't take advantage of it without having to swap out my system twice every other year.

Specially since I OWN a full RB system for my car. & all I get ot use is the muffler (which is excellent.)

Grrrrr....

RxTex

iTrader: (4)

Id of assumed that you knew that swapping the exhaust takes maybe 5 minutes once the cars in the air... Not bad for a once every other year thing if you ask me.

plentymoon

lol thanks for all the tips guys yeah I was out tonight cruising around in the good ole FB and I've been giving her some Redline of course and I think it helped free up some carbon cause now the exhaust is having the that nice rotary idle exhaust tune.

and with a quick look over with a few fellow mechanics but we all kinda came to the conclusion that both the carb and the motor were rebuilt sometime ago and thats why it has almost no problems.

hopefully this saturday and monday Im gonna be getting some extra income and gonna try to do a full exhaust all at once. xD

DivinDriver

iTrader: (15)

Little more complicated with a thermal reactor system like I have, Tex.

The RB header & pre-silencer is 5 mins either way, sure, but the thermal reactor, heat shields, air duct, cold air injection / air pump plumbing, hot air plumbing, heat exchanger, ACV, EGR, block-off plates... those take a bit more time, effort, and gaskets.

Unlike the FBs you are used to & which the OP asked about, with the skinny stock exhaust manifold, removing the thermal reactor alone requires either special tools or removal of the intake manifold to gain access to the stock upper mounting nuts.

And it's twice every two years, (before, then after, the smog check), not once.

I'd have assumed you'd want to know that before you tried to troll a guy who's been working on these cars (& passing smog with them) for 25 years.

CyByrd

Shot dd. get on dat a-ssss lol

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DivinDriver

iTrader: (15)

Just a friendly explanation for our good friend Tex, Cy.