1984 Nissan 300zx, buying a cold air intake...need some more info


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So i am looking into the K&N Cold Air Intake part number 948+0052 and i wanted to know just a bit more info regarding it as i am a new to performance upgrades on cars...this will give me about 8 more horse power but i have 2 questions...

1. Will it prevent my car from heating up more than usual?

2. Will this particular part enhance the sound? (i know...i had to ask)

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So i am looking into the K&N Cold Air Intake part number 948+0052 and i wanted to know just a bit more info regarding it as i am a new to performance upgrades on cars...this will give me about 8 more horse power but i have 2 questions...

1. Will it prevent my car from heating up more than usual?

2. Will this particular part enhance the sound? (i know...i had to ask)

First off, horse power gain will vary from application to application. With some engines, such as mine (Honda JDM D15B), a CAI will make little difference unless I get an upgraded intake manifold and exhaust. Now, the air intake plays no part in keeping your car cool, and I advise you read a bit before going on with an application like this if you don't know what you're doing..while it's a fairly simple operation, it's best to be in the know. The air intake is just that, it takes air from outside and with the help of the intake manifold and brings it to the head, which in turn mixes it with fuel to explode and move the pistons.

Basically, a CAI will reach closer to the bottom of your car where there is less heat and cooler air. With cooler air your car will run richer and the explosion will be better than with warmer air. Regular intake systems or short ram intakes just take air from within the top of the bay, meaning it's hotter air. Air from closer to the bottom of the car is cooler (remember, hot air rises). There are a few things to consider about this, one is if your area has any flooding or areas where rain can accumulate pretty high. If so, water can get into the intake and into the engine unless you have a bypass valve. And even then it's risky. Look into this, as it's not a good thing to have happen :) You'll have a dead engine if it does.

About the sound, most likely no. While some intakes will make the car sound a bit better, it usually won't be noticeable. If you open the hood and put your ear close to the intake, then yes. Otherwise, there will be no sound enhancement unless you upgrade your exhaust system as well.

Good luck, hope this helped.

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So i am looking into the K&N Cold Air Intake part number 948+0052 and i wanted to know just a bit more info regarding it as i am a new to performance upgrades on cars...this will give me about 8 more horse power but i have 2 questions...

1. Will it prevent my car from heating up more than usual?

2. Will this particular part enhance the sound? (i know...i had to ask)

Just to add to Cpu Killers' informative post.

I doubt you will see 8hp from just a cold air intake. I would look to see if anyone has actual dyno runs with that intake installed on your model car. That 8hp is probably some generic number from the intake manufacturer with a test installed on a car that had a very restrictive intake (but good manifold), ran hot, with a free flowing exhaust, done in the heat of summer, in a desert, ect.

300 zx's are sports cars and I would expect would be engineered with a decent performance oriented intake system from the factory. I think you may see some hp gain, but 8 would be optimistic. I'm going to assume as popular and as long lived as the Z cars are that there is a Z forum out there some where. You should be asking your question there also.

It will not prevent your car from heating up more than normal. That is a function of the cooling system. If you are having problems overheating then look at your cooling system.

It will probably change the sound of your engine some. Enhance would be a subjective opinion. You also may not notice any sound change at all depending on how loud your exhaust is. The exhaust is what most people hear.

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  • 2 weeks later...
First off, horse power gain will vary from application to application. With some engines, such as mine (Honda JDM D15B), a CAI will make little difference unless I get an upgraded intake manifold and exhaust.

New WRX gets 20+whp and 20+wtq from them....hardly "little". the only cars that will have "little" difference are cars that have a VERY efficient stock system. Both my Escort and Mustang had gains from an intake.

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New WRX gets 20+whp and 20+wtq from them....hardly "little". the only cars that will have "little" difference are cars that have a VERY efficient stock system. Both my Escort and Mustang had gains from an intake.

Well yes, that's why I said it will vary by application, and in my case it makes little to no difference :p. I have no idea how much of a difference it's gonna make on his 300zx, but my guess is not much. I'm also emphasizing that if the place he lives floods, he has to be careful, because even with a bypass valve he can get water in the engine, and that's it for him; the CAI will end up being a hassle that's not worth the gain. My assumption is that if he thinks an air intake will help the car run cooler, he won't have enough know-how to rebuild an engine.

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New WRX gets 20+whp and 20+wtq from them....hardly "little". the only cars that will have "little" difference are cars that have a VERY efficient stock system. Both my Escort and Mustang had gains from an intake.

20 hp at the wheels from just a CAI. I'll jump out on a limb and say that I doubt that number is any more than marketing hype. I would have to see a real dyno, on a real stock car in order to buy that. If that 20 hp is true than my opinion of Subaru's engineers just went way down. That has to be one restrictive stock system.

Again, you may see some gains. You may even see some losses. It depends on the car. Just don't blindly accept the advertising. Look this up on the Z forums. I'm sure someone has done this and probably even has the dyno runs to show.

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20 hp at the wheels from just a CAI. I'll jump out on a limb and say that I doubt that number is any more than marketing hype. I would have to see a real dyno, on a real stock car in order to buy that. If that 20 hp is true than my opinion of Subaru's engineers just went way down. That has to be one restrictive stock system.

Again, you may see some gains. You may even see some losses. It depends on the car. Just don't blindly accept the advertising. Look this up on the Z forums. I'm sure someone has done this and probably even has the dyno runs to show.

Totally agree, 20 seems way out of the water. And again, check some Z forums, guys there will probably be more than willing to help you out.

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  • 1 month later...

I really doubt you will get a noticeable gain from a CAI. There was a lot of chatter about CAI's giving big gains to the Nissan Maxima which I own, but after reviewing a lot on the chatter, i decided it's probably unlikely to give me any benefit except extra noise.

The 300zx is one kickass car, i hope you post some pictures, and if you're truly trying to get [even more] performance out of it, i suggest you dig deep online for a good first mod. I have a Maxima and am looking at a Ypipe soon, as that is the best hp/price mod available for mine.

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as cpu killer said, the cold air box on a stock standard car will make little to no difference. If you have a highly modded car you might see this 8hp difference, but its response and all the rest that is what it'll help the most.

When you increase mods thats when you'll notice it because the car will be wanting more air. You probably already know this though.

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A local, well respected VW tuner did some tests using the BMC Cold Air Intake on VR6 engined VW's and did find that they got noticable gains when compared to the stock airbox. I'm not talking like 10 horses or anything but a few BHP and a few lb/ft of torque.

A CAI will also improve the engine note, no doubt about it.

The Cold Air Intake is the only type of filter I'd use other than just a drop in panel filter replacement. Cone filters, etc even with heat shields just draw in too much warm air from the engine bay IMHO.

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