cls6888

So I tried to make a cai for my 87 TII . . . but i guess its not possible?? Cause it just stalled at idle. What are my options to get cool air to my intake , pictures and ideas would be appreciated. HeatSoak is owning my cars performance once it gets hot.

NZConvertible

If what ever you did makes the engine stall then you did something wrong. Most likely you've forgotten to plug the AFM back in (if you disconnected it) or you've created a post-AFM air leak.

Evil Aviator

Yes, it sounds like it is probably not possible for you to make a CAI, and it's good that you realize it before you cause a lot of damage. Some people are just better off working overtime at their regular job and paying an actual mechanic to work on the car. In fact, most of the fastest sports cars in the world were not built by the owner and/or driver. The sports cars owned by mechanics are usually all beat up and never seem to work quite right. (Hehehe, I'm gonna take some heat for that remark, but it's usually true).

Have you actually measured your intake manifold air temperatures, or are you just guessing based on what a bunch of Honda idiots told you? I recommend that you take your car to a reputable rotary engine performance shop and have them diagnose and correct the performance problem. Also, stay away from the Honda idiots.

WadeMCarter

cai impossible? you give up quickly.

Rx7TyreBurna

iTrader: (1)

http://www.mariahmotorsports.com/eng...iah_airbox.htm

????

NZConvertible

A heat shield is not a cold air intake. How many times does that need to be repeated?

cls6888

Well it just seems like ive never really seen a cai on a turbo just n/a's all ive really seen are heatshields , The AFM was plugged in , I guess i must have just had a small pin hair leak or something that threw it off.

SuperRotorMan

guys.. im turboes and have a Cold Air Intake....

http://www.cardomain.com/member_page...75_20_full.jpg

Evil Aviator

An intake that does not cool the air below ambient temperature is NOT a cold air intake either. How many times does that need to be repeated?

Also, heat shields usually work better than a "CAI" because they tend to offer the same air temperature but without the usual restriction of the convoluted "CAI".

A REAL cold air intake:
http://www.are.com.au/Big%20HP/Dry%2...%20cooling.htm

NZConvertible

No, you have a Very Hot Air Intake.

The air outside is always going to be colder than the air in the engine bay. What would you rather call it?

It's impossible for just a heat shield to do that. The air has to come from somewhere, and if there's no path for outside air to get in, then hot air from the engine bay has to be sucked around the edges of the shield. This not only defeats the purpose of having a heat shild, it also causes extra restriction.

That would be a misunderstanding of the term then. A cold air intake is any system that ensures only outside air is able to enter the intake, and not hot engine bay air. That doesn't (and shouldn't) necessarily mean a "convoluted" air path. My pod filter is in the usual place in the engine bay surrounded by an insulated heat shield, with two holes cut in the sheetmetal to let outside air in. No duct is necessary.

Evil Aviator

I think maybe he means "cool" intake (cool meaning that it looks nice, lol). Ironically, "very hot" can also mean the same as "cool". Don't you love slang?

It's called an "air intake", plain and simple. If it is designed to suck in hot discharge air from a heat exchanger, then it is a "poorly-designed air intake", lol.

It's not impossible, and I have personally measured manifold air temperatures to verify that properly-designed shields/deflectors/guidevanes work just fine. Maybe it would be impossible for you or the general public to come up with an efficient design, but it can and has been done.

Most of the "CAI" products on the market are of the convoluted type. Apparently, the non-convoluted types are now called "short ram" intakes. Sometimes I wish there were some giant monster defender of physics who would stomp on the heads of these marketing guys.

The insulation is not necessary, but it doesn't hurt anything.

From the point at which air begins to enter the intake system to the discharge end of the lower intake manifold (LIM) is called the "duct". One could argue whether or not the AFM, air filter, intercooler core, and throttle body are or are not components of the duct, but absolutely without a doubt your car does have a duct and it is necessary.

Factoid: The automotive term "manifold" is a short form of "manifold duct".

NZConvertible

So maybe you get a reduction in radiated heat from the engine, I'll give you that. But that still doesn't change the fact that unless there's another way for air to get to the filter, you will be sucking in engine bay air. It's not going to magically appear from somewhere else. I have personally measured engine bay air temperatures over 60degC/140degF, and the result of heating warm outside air (27degC/77degF) that high is a reduction in density of 10%, with a corresponding affect on power. That's not a guessed number either, it's calculated.

I totally agree. When I refer to a CAI I'm definitely not referring to anything marketed as a "cold air intake", or what half the people here think is one. I'm talking about a system like I described above.