That Rx-7 kid

I have a 91 n/a and i was just wondering (from the guys with experience with the product or something close to it) if the "intake kit" is worth buying. Specifically the one that has the bonez filter and clamp, and the filter for the air pump. Is there much of a power gain? So far my car is pretty much stock, bot im ordering a rb header, bonez high flow cat, and corksport cat-back. So, i was wondering if i should get some kind of intake upgrade too while im at it and have the money. Any opinions on this subject will be appreciated.

Thanks- matt

adrock3217

Just a note, your ears are going to be bleeding with that exhaust setup.

And uh...intakes are worth it, but only cold-air, or if that isn't an option, one with a box.


The "bolt-on" intakes made by Bonez, HKS, etc. are not worth it, and will literally cause you to lose horsepower.

SayNoToPistons

Simple answer... no unless you have some sort of great custom design so heat from the engine wouldnt enter the intake. K&n drop in ftw. search.. its been covered many times before.

That Rx-7 kid

the bonex is similar to the kn- im gonna just wait and design my own custom intake- pipe, filter, cold air box and all..........and yes i know that my exhaust set up is gonna be loud......really damn loud

tuns0ffun65

it is pointless to upgrade your exhuast system without upgrading your intake system also. tis not the fact of whether the engine is taking in hot air, i meen obviously you do make more power with colder air, but the volume of air is also important. the more air you get in the motor the more power you make, simple as that. so yes get some sort of aftermarket intake system and it will make a difference

AbortRetryFail

I've got a K&N cone on mine right now, YES it did make a difference, mostly on cold days or before the car has been driven for hours. Once it gets heat soaked power goes to ****... Though the stocker did that too.

I left the fresh air snorkel thing on. There's no reason to remove it as it DOES bring in some cooler air.

bacek

i dont believe you...

and your wrong

with his mods he doesnt need an intake. the only reason for him to get an intake is for the sound

tuns0ffun65

so you're saying that a vehicle with a full aftermarket exhuast system does not need a high flow intake system?

do you know the exact reason for opening up and exhuast system in the first place aside from looks and sound?? the more air you move through an engine the more power you make. opening up the exhaust makes it easier to get air out of the engine. now that mod is pointless with out a high flow intake system to get more air in, its like having half the equation. you will make more power with the high flow intake, its simply how the combustion engine works. so no im not wrong.

Sideways7

iTrader: (7)

Yes, you are. Even on a TT Supra, there is only about a 6 or 7 hp increase with a cone filter, and that car will flow way more air that an NA rotary. Sucking in hot engine bay air will lower your power more than the gain from the increased air flow. Someone figure out the difference in intake temps, and it amounts to a pretty substantial loss of power.

Noel Caraballo

iTrader: (2)

corksport catbacks are bad ***, aint nothing sweeter than people staring at your ride comming towards them and setting off car alarms 200 ft away

Sgt. Pepper

Unless your car is freakin slow. Having a loud car is fine if it's turbo/fast, but loud NAs arn't really cool.

NoRotor,NoMotor

aw... i have a loud NA.. FTW

Rx7TyreBurna

iTrader: (1)

Eh, I had a cone filter. And it was great for the first 10-15 minutes of driving. After that. It was crap.

With my cone filter on there, I had a 3800 stall, and overall once the car warmed up, less power.

Put the stock box on, and the 3800 stall went away.

One thing you really want to remember about intakes is air velocity. You can increase volume, but it is going to kill torque. So maybe you will feel that extra 3hp in the last 500 RPM before you shift.

Spend the money on something useful. Or save up for an SAFC or something.

lupin

iTrader: (3)

Go with a zeal megasquirt and there will be no more afm and it will control everything else under the sun. The megasquirt system is better than the safc because it is a complete standalone ecu.

I believe in exhaust velocity and that it is better to have a cat in place. I don't believe that a more restrictive air intake will help anything though.

tuns0ffun65

ok you guys go on thinking that high flow air filters suck and stay with your stock ****, and ill stay out in front of you while you wonder why you cant make enough power

Sgt. Pepper

I bought my car with the stock air box. I switched to an Apexi cone filter with no heat shield or cold air source. It felt sluggish when the engine bay got hot. I Put back my stock box and it feels fine now. Not any big increase but It feels less sluggish.
So the only way I will put a cone filter on in the future is if I get a heat shield with some form of cold air going into the box.

I ran a 16.9 consistently with the Apexi and ran a 16.8 with the stock box if that changes anything

Sideways7

iTrader: (7)

I actually have a cone filter, because the car came with it and I didn't want to **** with getting a stock airbox. I know that it doesn't give me gains, though. There have been enough people on here that have posted objective experiments, not just theory, proving that. I still believe they give gains on a turbo car, though, due to their higher air flow.
Once I get my car back running, I'm going to rig up some sort of CAI.

KompressorLOgic

iTrader: (6)

haha i had basicly that exact same ehxuast setup, yeah it is LOOOUUUUDDD it was just barly loud enuf to make my ears hurt after driving for a while...

after that i had a second muffler welded inline ( another fart can) and it toned it down just enough to where my ears would not hurt, but it was crazy loud still


as for an intake, id say a cone filter alone does not add anything
unless it has a heat shield cornering off that area,

Sideways7

iTrader: (7)

It made your ears hurt? I have a similar setup (RB header/presilencer and apex N1) and it was damn loud, but never to the pain level. On a side note, I just sold a "stock catback" for 50 bucks, only to find out it was a dynomax system. Oh well, the last thing I needed was more car parts.

KompressorLOgic

iTrader: (6)

that is because i did not have the rb presilencer( that thing does alot! for sound!)

, i had a " high flow 3" cat instead ,which did allmost nothign for sound...)

scrip7

iTrader: (6)

After getting a good look at my stock airbox, I have yet to see how people supposedly get hp gains as they claim to. The collector appears to be of adequate size and it is definitely aimed strategically to bring only air outside the engine bay that is more dense than what you would have behind the fan. The duct from the box to the afm seems to be large enough as well. I'd like to see some test results from a flow bench.....surely someone on the planet has concrete answers.

Sideways7

iTrader: (7)

Ah, that explains it. I actually ran for about a week with nothing but the stock exhaust manifold while I was waiting for my header to come in. Damn that was loud.

Sgt. Pepper

Damnit I just bought a Racing Beat header and hi-flow cat. I thought hi-flows muffle better than straight pipe and presilencers. I have an Apexi N1 catback. Man I don't want it to be annoyingly loud Guess I need to save for a Racing Beat catback, in the meantime buy a silencer.

My5ABaby

iTrader: (7)

How the hell is an intake going to change how his car sounds?

scrip7

iTrader: (6)

Haven't you ever heard the "chwoooooahhh" sound that an engine makes when the intake duct is removed from the throttle body and you step on the gas???....you get that sound when you install a cold air intake. Most car manufacturers install a plastic "resonance chamber" somewhere in the intake tract to "cancel out" those sound waves so it's quieter.