what would be better for a 07 is350 short ram or cold air? and what brand?

 

cold air. f-sport intake.

Don't buy short ram. You loose horsepower at high end.

 

+1, go with the f-sport or find a used LMS

 

are there lot of people who uses lms for is350?

 

That doesn't make any sense. If you get any gains at all from a short ram the high end is where they will be.

You really can't go wrong either way, none of the intakes out there really do much of anything except for sound.

 

Do you even know what short ram is? Short ram sucks in hot air which makes your engine hotter. Why would you want hot air in your engine? You want cold air.. Cold air = cools engine.

SO F-sport is the way to go.

 

stock air box, HKS filter, joe z pipe.

 

It's not about 'cooling' the engine. Cold air means a higher density of oxygen in the combustion chamber. If you're sitting still on a dyno, yes, you will get some pretty hot air through a short ram, but that's not the point. Most of the time you're moving down the road, supplying the intake with a continuously replenishing supply of cool air, especially if you leave the stock intake track in place to funnel air to the appropriate point. Short ram intakes are more about allowing the engine to intake larger volumes of air, rather than colder air.

What I'm saying is the gains/losses are minimal in either direction so it really doesn't matter.

 

Cold air sucks air into the engine from outside the car. Not under the hood like SRI. The air under the hood gets hot since it is located where the engine is. Taking air from outside of the engine gives a colder charge which mean it is denser = has more oxygen = more HP.

My friends work at a local tuner store. They have track cars. They have done a test on a 350z/g35 3.5 liter engine with a CAI and SRI. The CAI gain HP and torque as usual but then the SRI loose HP but gains torque. I am sure many people on clublexus also know that SRI loose HP because I remember someone posting that somewhere here.

 

CAIs make the car more prone to hydrolock...better hope it doesn't rain, because she will suck water

 

this may be a stupid qn but... is our stock intake CAI or SRI?

 

I don't think it really matters for our car since you don't really gain anything but a better sound from an aftermarket Intake
yeah i know you might get 2~3 HP gain, but IMO,
Intake is for better sound for this car..
if you are looking for a sound, then go with Injen,
if you want better throttle response plus some sound, F-sport or Joe-z

I personally tried both Injen and F-sport, and in the end, I sold my F-sport

 

Except nobody actually makes the type of intake you are describing for the 2IS (where the intake inlet sits down below the fender close to the ground to suck up water from puddles)



Here's the facts-

No intake for the 2IS adds significant (more than 5 hp) amounts of power.

The -stock- intake provides more air than the engine is capable of using.

Smoother intake paths like provided by the Joe Z or F-Sport intake provide the maximum (yet still really tiny gain) for the least cost while retaining the cold(er) air nature of the stock intake box.

Short rams generally provide the same "smooth path" benefit while providing no added benefit whatsoever besides more noise and more cost, while also sucking hot air when launching the car.


The F-sport also has the advantage of being 50 state legal if you live in CA or something.

 

I felt the loss of throttle when I had my K&N Typhoon so I switched to the F-Sport...lost a little sound but gained my throttle

 

so basically.. if i wanted lil bit more throttle i would have to get joe z pipe or f-sport intake?