Just bought an 89 S5 TII, I would like to put an intake on it, but not go too crazy. Emissions are a concern as it's driven a few times a week t work. Any suggestions?

 

Leave it stock.

The intakes on the FC's are not that restrictive for the N/A motors (unless is is some crazy ported with a full custom throttle body or carb setup) and what you gain in flow you will lose double or more in hot air from the engine bay.

Start with your exhaust....that is where rotaries gain power in gobs..

 

It's a Turbo, not an NA, kind of would like to enjoy the sound of the turbo more

As for exhaust, any suggestions there as well? I like how quiet the stock exhaust is honestly, but I wouldn't mind the power gain from aftermarket exhaust. However, passing emissions is a must as well. I like the racing beat cat-back system, but its so pricey....

 

drop in K&N filter

 

Please define what you mean by "intake" and "too crazy". What is wrong with the current intake system?

 

well if you didnt know its cool to have a cone filter sucking hot air outta the engine bay rather than sucking in cold air from outside? jeeze havent you ever seen a honda before?

 

Nothing wrong with the current intake system, just thought there might be some gains by having a better aftermarket one. From what I've heard, having an aftermarket intake makes the turbo a little louder as well, without adding the headache of a BOV...

 

When I first got my car, the first thing I did to it was an apexi cone intake. Hot air blah blah blah. You can build a box, but since you have a turbo, we all know building a box around it won't matter. It's going to heat up at the turbo regardless.

I really loved the sound of the stock car with the intake on it. Gave it a nice growl/bark. I did notice a bit better throttle response as well. I'm honestly not sure how it will sound on your turbo, because my turbo has full exhaust on it + I can't even hear the intake.

I'm a huge fan of corksport products as well. Keep an eye out in the for sale section for used cat backs. As long as your cat is in decent condition, your motor is strong, + you have your air pump in then emissions shouldn't be a big problem. Just putting an intake on probably won't change much in that aspect.

 

Yeah, hot air blah blah. No performance gains blah blah. Useless intercooler, blah blah. Fragged apex seals blah blah.

Better to just vent your stock BOV straight to the engine compartment if you want zoom, zoom noises. Sucking preheated air into a rotary is a bad idea from a performance and a life standpoint. If you prefer cool turbo sounds to cool air, go ahead and install a cone, just don't fool yourself into believing you're doing it for more power.

 

that doesnt make any sense. it doesnt matter on a turbo system because the air passes through the intercooler. therefore bye bye hot air.

edit:wait is this guy running it without an intercooler?

 

sarcasm.

 

The flaw in this theory is that the SMIC is terribly ineffective at cooling the charge air at decent boost levels. Have you ever measured temps at the IC exit? I assure you they are far from ambient beyond 9 psi boost. Adding more heat load to an already thermally challenged intercooler is simply a bad idea.

What you're saying is true for a more efficient front-mount setup, but we're talking about a stock car here.

 

UHHH. Stock cats don't run 9 PSI.


And for you other comment, who the **** blows up their motor because of an intake?
Seriously, unless you show me dyno proof of the same car with the stock airbox + then with an intake i call bullshit. Yes, there won't be much of a gain from just an intake, but it's not going to hinder the performance either. You're running that air through a turbo which is hitting somewhere around 1000 degrees. Probably more, but that's a modest estimate for a stock car. Plus, you're freeing up more space in the engine bay + a lot of people like how it sounds without all that snokeling + box ****.


Sorry I'm drunk + had a bad night. fuckoff. I just wannna see a dyno graph proving everyone's theory about this ****.

 

seriously look at some numbers, a good intake tube, cone filter with some draw to ambienat air temps (like stock, or "cold air intake") might do 5% hp increase. 5% of a 150~ is not much.

 

+1 K&N drop in filter.. cheap and still uses the stock cold air box.....

as for exhaust RacingBeat is by far the most used for after market exhaust other than trust/greddy and apexi N1.. im getting mine installed tomorrow.. scratch that today!!! =D

 

The cone filters do look cleaner than the stock ones.... And sound better.... I'll probably hold off for now, until I can figure out some sort of cold air box to build around a cone. It is a stock inter-cooler, I suppose the chances of me causing more harm than good are not worth having the intake "sound cool". Thanks for the opinions folks, I appreciate it

 

Corksport does make a TID replacement, but you are still on your own when fabbing up the airbox. Changing the intake should not effect emissions as long as the proper fittings are on the new tube to connect the PCV line.

 

Oh, if you are just looking for more noise, then yes, you will gain some intake air noise by replacing the stock air box with an aftermarket cone type filter. On the 89, you can just attach the cone filter directly to the airflow meter with a hose clamp or zip tie once the stock air box is removed. Do not buy any of the cheapie Ebay filters, as they have been known to disintegrate and the pieces get sucked into the turbo and engine. If you want to keep the air pump, it will require its own "crankcase vent" filter.

LOL, I never did figure out why the Honda engineers designed some of their engines to suck air from the top rear of the engine.

 

the old guys here will tell you to keep it stock and put a drop in because they never stepped out or experienced anything outside of that.

Sadly there isnt much intake kits for our cars,
Intake kits/aftermarket wasnt really around when our cars where new, and it wouldnt be wise for a aftermarket company to start producing a kit for an old car . so do a lil custom fabing.. like a intake pipe from another car, couplings, and a 2.5 cone filter to attach to the maf.. Then from there you can direct cool air to it via opening up a hole in the wheel well and ducting it.

 

Aaron, I like the corksport ones. So I'd have to buy both pieces right? There's two for my model, ones a charger pipe, and ones like an "S" shape. Does the airflow meter go in between the two?

I'll have to come up with some ideas for a cold air intake

I need to sell my Jeep, need money for all the tasty stuff for the car now

 

The airflow meter comes before the turbo inlet duct. The order of piping would be:

Filter->AFM->TID->Turbo->Charge Pipe->Intercooler

The TID is the s-shaped snake tube. The charge pipe comes out of the turbo and into the intercooler.

 

So I'd only need to buy the the TID if I put a cone on the AFM? Are the HKS kits nice?

 

You don't need to buy a TID at all unless you want to replace the stock one. A cone filter would go directly on the AFM after removing the stock airbox. The stock TID could be kept.

 

Oh... thats much cheaper... lol. So are the HKS kits worth the money? Or would a standard k&n filter suffice?

Anyone have any links to builds people have done for cold air intakes?

 

Actually.... after thinking about it, wouldn't boxing in the filter negate any "turbo" noise I'm looking for? Would it be worth it?