1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Air filter choices.

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Old 07-15-07, 07:58 PM
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Air filter choices.

Would I be better off buying a K&N stock replacement filter, and keeping it in the stock housing, and possibly extending the snorkel to outside the engine bay, or buying a open element filter assembly and doing away with the stock housing.


This


Or this.
Old 07-15-07, 08:08 PM
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I had the 2nd pic in my old SA, left everything stock. Never really noticed much power gains.
Old 07-15-07, 08:23 PM
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I had a bonez racing set up basically a k&n filter with a extension and new top hat thats smaller to allow air to be sucked from the top. I also modified the factory air box by cutting off the sides. that set up worked really well don't know if it helped in power really but you could most definatly hear the difference under throttle.
Old 07-15-07, 08:29 PM
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you won't be able to find a replacement for the stock airbox at any auto parts store. The nikki has a different size opening than the standard holley type.
Old 07-15-07, 08:35 PM
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^^I was thinking about that too.

I guess I'll just order a K&N and buy some sort of corrugated piping from a hardware store to extend the intake.Might do what others do, and cut a hole on my radiator shroud, to bring some cold air into the intake.
Old 07-15-07, 08:40 PM
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http://www.mrcmfg.com/respeed/catalo...3a48c782178a17
Old 07-15-07, 08:43 PM
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Hmmm...that product looks usefull...but I'd rather fab one for free...and also that RX-7 with the blue and yellow stripes near the site logo is a photo chop that I did...how did they get it?

Look here's the original.



Tell me they didn't steal it.
Old 07-15-07, 09:06 PM
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lol.... that is bwaits' site and you told him he could use it elsewhere.
Old 07-15-07, 09:23 PM
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Ohh yeah..now I remember haha.
Old 07-15-07, 09:26 PM
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The rope in the pic is because i have my hoses tied off the fender while coating the engine bay

i fabbed this up, i plan on modifying the headlight bucket to get cold air in, i cant see how it can hurt, i do notice a huge sound difference and a possible throttle response, not sure being i was tuning my carb when i put it on, so it could have been adjusting the carb. Some people will say racing beat did a lot of research on there design for air flow, to a degree that is true but sucking heat right off the header cant be great either. I made mine out of aluminum and made a aluminum heat shield and it pulls a lot of heat out.
Old 07-16-07, 01:27 AM
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Originally Posted by robs_seven

The rope in the pic is because i have my hoses tied off the fender while coating the engine bay

i fabbed this up, i plan on modifying the headlight bucket to get cold air in, i cant see how it can hurt, i do notice a huge sound difference and a possible throttle response, not sure being i was tuning my carb when i put it on, so it could have been adjusting the carb. Some people will say racing beat did a lot of research on there design for air flow, to a degree that is true but sucking heat right off the header cant be great either. I made mine out of aluminum and made a aluminum heat shield and it pulls a lot of heat out.

where are the hoses from the stock air housing? do you have emmisions in your state?
Old 07-16-07, 07:08 AM
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IMO, you have two options. one, go with the RB filter set up or use the respeed piece for a custom CAI. i have the RB filter set up and i love it.
Old 07-16-07, 08:15 AM
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I bought the K&N stock replacement for my 84/85 GSLs and after using it for a year realized that I'd prefer to have the paper disposable ones, which are still available for less than $5.00, at least around here.



Ray

Last edited by Rx-7Doctor; 07-16-07 at 03:15 PM.
Old 07-16-07, 08:35 AM
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Originally Posted by a-cups847
where are the hoses from the stock air housing? do you have emmisions in your state?
I have a hole underneth the rotor shape tapped with a hose going to my pcv and no we dont have emissions, if we did i would not worry about it anyways
Old 07-16-07, 12:05 PM
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to robs seven ok one more quick question,if i was to do the same thing youve done, would it be fairly easy to switch back to the stock housing andall hoses for my emmisions, or is that a really complicated peice of work?

Last edited by a-cups847; 07-16-07 at 12:06 PM. Reason: forgot name
Old 07-16-07, 02:47 PM
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It's too bad ISCRacing doesn't make their airbox anymore. It's the one I've got. I never liked the look of the RB one, but the open-air style I always found was nice.

http://s202.photobucket.com/albums/a...t=IMG_8736.jpg

I'd say get the RB one. It's especially great if you have a Sterling with Mech Secs.. when you open it up you *really* hear it through the carb, it's a cool sound.

Jon
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