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Thread: Exhaust port below intake ports
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jfaplanet
Redlining
Posts: 356
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posted May 07, 2004 10:59 AM |
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Exhaust port below intake ports
I need a a bit of advise. I have a R3 set of plates that I plan on using for my 13B that I am going to put back in my restoration truck. The intake that REPUGURU fixed me up with matches the intake ports but leaves the exhaust port exposed. I have a set of GSL-SE housings that I plan on using. What is the best way to block off the exhaust port. Should I try to block it in the housings or weld it up on the intermediate plate or fab a blocking plate. Anybody have any suggestions. It seem that all my intermediate plates be them 12A or 13B have either tall ports or short ports and the exhaust port. But the 1 13B intake manifold is short port with no ehaust port. Any help is appreciated..
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Klaus43
Rotorhead
Posts: 1259
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posted May 07, 2004 11:11 AM |
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I don't have your definitive answer, but...:
...I'd utilize blocking bolts/nozzles in the rotor housings, as well as a block-off plate w,/ gasket material below the intake, just to close off everything. I'm not a fan of exposed, open places...! As far as intermediate housings/port size: there is indeed a variety without the exhaust heat 'riser' port... *some* even have 'taller' intake ports as well! It's up to you to ID just how much porting--or at least port matching--your chosen intermediate housing will accommodate... it might just be a matter of judicious porting work... remember to double-check the gasket, as well--I know some stock intake gaskets protrude into the porting...(yuk!). Also, it's said that not only do the nitrided housings last longer, but they're actually easier to port, once you bust thru the hardened layer... Best of success, --K.
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Rotorranch
Newbie
Rotary Power !!!!
Posts: 8
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posted May 14, 2004 11:52 PM |
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It shouldn't be a problem. The port below the intake on the intermediate housing is for air injection to the exhaust. From 1976 on, the motor didn't use that passage for air. It goes nowhere. If you're worried about it, I wouldn't weld it shut. You might warp the housing. Just fill it with JB Weld or a similar product, and let it ride!
Rotor
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Rotor Ranch Racing
Fayetteville, GA
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