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Index > Engine/Drivetrain > Thread: Blocking Nozzles
Thread: Blocking Nozzles
mazdaorbust


Revvin Up
Posts: 82
posted August 11, 2007 05:02 PM

Blocking Nozzles

I am removing the air pump off my 13B. I know that RB sells blocking nozzles for 12A's. Does anyone sell them for 13B's or will these they fit either one?

       
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TimPA136


Redlining
Posts: 325
posted November 18, 2007 04:56 PM

Blocking Nozzels

I'm also interested in that answer if I can't locate a good intermediate exhaust to bolt up to my good thermal reactor.
Will a racing beat header bolt up still using the A.I.R.pump?

       
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Klaus44


Redlining
Posts: 365
posted November 19, 2007 09:50 AM
Edited By: Klaus44 on 19 Nov 2007 09:55

RB Blocking Nozzles:

1975 and earlier Rx-2 and Rx-3...Part # 11301

1974/75 Rx-4, and 1974-76 Rotary Pickup...Part# 11302

That is how they are listed on page 53 of Racing Beat's older version of their 'Technical Manual/Catalog', anyway...

Some folks simply plugged these holes with regular bolts, then ground 'em down to flush in the exhaust ports... IMHO, it's much better to avoid the use of dissimilar metals in this location, and plug aluminum with aluminum, rather than steel.

The air pump and all the rest of that stuff get removed when the header goes on. There's an additional blockoff plate that covers where that system used to mount to the stock intake manifold.


       
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TimPA136


Redlining
Posts: 325
posted November 22, 2007 11:15 AM

Blocking nozzels

OK, Thanks Klaus.

I better buy the plate and nozzels for the future. If I can repair or get a new stock intermediate exhaust thats all I really need . This is my excuse to get a good custom exhaust.... Maybe Santa will bring a header and pre silencer.

       
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Klaus44


Redlining
Posts: 365
posted November 24, 2007 12:11 PM

I hope he does!

The RB header --and a free-flowing exhaust from there back-- is the single best bang-per-buck upgrade from stock you can make. Plus, then you're set for your choice of intake improvements... (or not).

       
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Jeff20B


Moderator
Posts: 661
posted December 01, 2007 10:00 AM

I didn't even use any blocking nozzles. One one engine I shoved a bunch of quicksteel in the ACV port. On the other, I simply used an ACV cover plate.

       
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TimPA136


Redlining
Posts: 325
posted December 02, 2007 03:27 PM

blocking nozzel / alternatives

Thanks for the tips.

Tim

       
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