Help with a cold air intake?
Hey guys- just picked up an NA '90 convertible. Down the road I'm planning on doing a full engine rebuild and turbo, but until i get some money saved up I wanted to do a few basic things. First and foremost I was going to put in a cold air intake, ordered a cheap aluminum tube and cone, went to put it in an found the air flow meter... Is there an aftermarket replacement? Or what do you guys recommend? I've been looking online and it seems like everyone just puts a cone on the end of it and calls it a day... Is that the best I'll be able to do without buying a map sensor and a new computer that will work with it?
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Originally Posted by peteyboy
(Post 11896428)
Hey guys- just picked up an NA '90 convertible. Down the road I'm planning on doing a full engine rebuild and turbo, but until i get some money saved up I wanted to do a few basic things. First and foremost I was going to put in a cold air intake, ordered a cheap aluminum tube and cone, went to put it in an found the air flow meter... Is there an aftermarket replacement? Or what do you guys recommend? I've been looking online and it seems like everyone just puts a cone on the end of it and calls it a day... Is that the best I'll be able to do without buying a map sensor and a new computer that will work with it?
http://rx7.com/store/rx7/images/Bone...rnew_small.jpg No need for an aftermarket replacement unless you're doing a standalone, where you can delete it. The only premade CAI is the Mariah Motorsports one: http://www.mariahmotorsports.com/ima...irbox1_200.jpg http://www.mariahmotorsports.com/ima...irbox2_200.jpg You can buy the close out assembly here: Mariah Motorsports by Design Energy Inc. RX-7, Rotary, KitCar and Sportscar Specialist |
Is there any way to delete it or replace it with something that will fit inline with an aluminum tube air intake all the way to the throttle body? It looks like the stock afm is really restrictive so I was hoping to do something else other than work with the stock one...
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Originally Posted by peteyboy
(Post 11896434)
Is there any way to delete it or replace it with something that will fit inline with an aluminum tube air intake all the way to the throttle body? It looks like the stock afm is really restrictive so I was hoping to do something else other than work with the stock one...
To get rid of the AFM you'll need to buy a standalone like a Haltech, Microtech, Adaptronic, Tech3, etc. Then you can can go to speed density and replace the AFM. ECUs | Adaptronic Haltech - Engine Management Systems | Engine Management Systems Microtech EFI Electromotive | Electromotive Just buy the AFM adapter and put the filter on it if you'd like to have a cone filter. In stock form the stock airbox is just fine. |
I would not have guessed cars made that much power on the stock intake- I'll just throw a K&N filter in it and call it day then I guess. Any suggestion for other entry level upgrades to make (I'm hoping to get maybe 200 whp out of it for now)? What is the weakest link stock? Exhaust? Ignition? I just want to give it a little more power and better sound for now while I save up for the rebuild.
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Originally Posted by Jager
(Post 11896431)
You'll need an AFM adapter.
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I have the cone filter adapter sitting in my garage.
And our cars have a "cold air intake" from factory. Its a ram air style provided you have all the original plastic bits. The S4 box flows better and "Broke_A_Baller" probably has one laying around for you. Tell him I sent you. |
Originally Posted by clokker
(Post 11896447)
Not with a S5 AFM he won't.
My bad! Sorry about that. Then he just needs to clamp the filter on the end of the AFM. Ez pz. |
Originally Posted by peteyboy
(Post 11896440)
I would not have guessed cars made that much power on the stock intake- I'll just throw a K&N filter in it and call it day then I guess. Any suggestion for other entry level upgrades to make (I'm hoping to get maybe 200 whp out of it for now)? What is the weakest link stock? Exhaust? Ignition? I just want to give it a little more power and better sound for now while I save up for the rebuild.
I use just whatever filters, takes forever to recoupe the money for a K&N. But I've had them before and it's great to not have to replace them. For a NA RX7 I'd do an exhaust, and if you want power eventually, you may need to look into a rebuild with a streetport, aftermarket intake manifold, aftermarket ECU, lose the exhaust diffusers, and a great tune. Another great modification is gears. But aftermarket RX7 gear sets are very expensive, but very worth it, and can help with the lack of torque that a RX7 has. Search around here and you'll need many different ways to upgrade your RX7 and enjoy it. |
Thanks for all the input guys. Like I said I'm just going to put a better filter in the stock intake (I do have all the parts). So with that settled, any suggestions for good mods to start with to up the power a bit and give it a little more aggressive sound? Ignition? Exhaust? (I have a wet shot nitrous kit laying around too but I don't know if that's a good idea to a bone stock car?) I'm super new to this car/rotaries any so input is appreciated!
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Your gonna play hell to hit 200hp out've a n/a without a deep wallet, just enjoy the car for now, save up for another motor and rebuild, than worry about your HP #'s
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What is everyone's opinion of nitrous? I only ask because I already have a kit laying around. It's roughly a 65hp wet shot though I can reduce that if necessary... Ok or bad idea? Would I need anything special other than a fuel pump, wideband afr, and adjustable fpr?
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IMO, save it for your turbo build, i don't see the tension bolts holding up to NOS, just run her how she is, learn the car, and while learning, make a todo list
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Originally Posted by archaphil
(Post 11896451)
I have the cone filter adapter sitting in my garage.
And our cars have a "cold air intake" from factory. Its a ram air style provided you have all the original plastic bits. The S4 box flows better and "Broke_A_Baller" probably has one laying around for you. Tell him I sent you. I'll grant that we have an ambient air intake stock but if you can prove there's an iota of "ram" effect in that setup, I'll eat my filter. |
Originally Posted by clokker
(Post 11896494)
First of all people, the OP has an S5 and that's a totally different animal than the S4 AFM...it doesn't easily work with a S4 airbox.
I'll grant that we have an ambient air intake stock but if you can prove there's an iota of "ram" effect in that setup, I'll eat my filter. Even if it didn't, the air still has 3 walls to hit before it even makes its way into the tube connected to the throttle body, if anything, i would think the air would be slowed down with the stock setup, let alone the small amount the stock opening had, unless that was to help speed it up? Quick batman, to the science chamber! |
There is an unimpeded path from the nose to the air intake snorkel, even with the hood closed.
It is a reasonable implementation of a fresh air intake given production constraints but there is no pressurization of the airbox at speed, thus, no "ram air". The engine is relatively free to suck in all the air it wants but I don't believe that any speed actually crams extra air to the throttle body. |
Originally Posted by peteyboy
(Post 11896428)
Or what do you guys recommend?
As parts wear out and need to be replaced, this is what I would recommend: - Drop-in K&N air filter - Racing Beat catback exhaust - Koyo radiator - KYB AGX shock absorbers and Racing Beat springs - Fumoto oil drain valve (no nipple) - Anything but the OEM stereo, lol
Originally Posted by peteyboy
(Post 11896428)
Is that the best I'll be able to do without buying a map sensor and a new computer that will work with it?
Originally Posted by lduley
(Post 11896523)
I honestly never understood the "ram" part either
Originally Posted by lduley
(Post 11896523)
the air still has 3 walls to hit... Quick batman, to the science chamber!
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