so as you can see, this isn't your typical versus thread. Yes, I am going to do nitrous instead of turbo. I feel it's more unique, and is more beneficial to a CVT sports driver. I am going to do it right though. the correct way that eliminates the negative effects of nitrous that are possible. nitrous isnt bad, people just don't set it up properly. so please dont get stuck on telling me not to run nitrous.

but to the question. i will be running a 50-100 wet shot in my engine. 100 is a lot, but once my engine is sleeved and all that other custom stuff im doing is done, it may be feasible. Would the SRI or CAI be more beneficial to the engine? I understand nitrous tends to make engines run a little lean momentarily until more fuel is added, so wouldnt the denser air of the CAI just make it even moooorrreee lean? seems risky. and I will have an evo hood with vents, so air will be coming into the engine bay if I were to get a SRI. at the moment im leaning towards the SRI v2.0


Thanks for any help!

 

It all comes down to tuning. Also bear in mind that the CAI will be better all the time. Honestly though I wouldnt use Nitrous Oxide. For one, u will be paying quite a lot to get it and set it up. A little too much for the very limited gains u see. Two, there is always a chance for something to go wrong. 3, if I am not mistaken it is not road legal.

 

Technically neither is boosting a car with most kits available, here in cali anyway. Hell most mods are not legal in cali lol. Id say if you are auto or "CVT" is the newer auto type tranny right? I would say SRI. Manual id say CAI. and a CAI shouldnt make you lean out if its a good product. And if you arnt a dummy with the gas i say juice it!

 

I don't know if anyone is still expecting a real answer to this thread but here is what I can bring up.

First, CVT is not exactly like normal automatic transmission it is, to my knowledge, a belt driven transmission where you don't have the traditionnal gear system to change the drive ratio. You can imagine it as a cone, the belt move from the thiner to the larger part of the cone as you increase in speed thus increasing the ratio and allows you to gain higher speed without increasing the RPM. This is more efficient than a standard automatic transmission. My explanation is oversimplified, if someone more knowledgeable about it what to share the knowledge, you're welcomed.

CAI can actually lean out your mix. Usually the objective of replacing/upgrading the intake is to achieve a higher air flow. This is achieve by using a less restrictive and generaly bigger filter and by using a larger pipe. The upgraded filter won't lead to any leaner mixture because your MAF will pick up the increase flow. The mix is leaned up because of the larger pipe. The amount of fuel to be injected in you intake port is computed by using an estimation of the total flow that comes in your intake. This estimation is acquire by taking the reading from the MAF and multiplying by some ratio that is calibrated to the diamete/area of your pipe. Since you put a larger pipe, the ratio is no longer calibrated and lead to the air flow to be underestimated and here come the leaning of you mixture.

So now comes the main subject: SRI vs CAI. Your application won't have much impact on the selection between the two. You must keep in mind that the are basically the exact same thing: it's a pipe of a certain length with a cone filter at the end. The difference come from the fact that the Short RAM Intake has it's filter inside the engine bay, very close to your engine thus it picks up hot air. The Cold Air Intake has a longer pipe and attempt to put the filter in a location where it would get a supply of fresh cold air. So generally, the cold air intake is a better choice. But it's got it's flaws; usually the filter is located where it can pick up and lot of dirt and water thus leading to a shorter life of the filter (higher operation cost). If not properly maintained, it can leads to potential engine problem.

For your case, with NOS, your combustion chamber temperature should rise a lot, similar to a turbo. But you don't have an intercooler to cool down the intake air so I would strongly recommend using a CAI instead of a SRI.

 

I don't know why you would put Nitrous in a FWD 2.4l engine... there's already enough torque steer..

 

just a project to keep me busy. turbo is out of the question, and i didnt wanna fabricate a supercharger. so this was the next best thing

 

I would take a look at the Takeda SRI for the 2.4L engine.

 

injen CAI.