WTB: MSP aftermarket intake

[Zhan]

Bump for any more offers. Nothing solidified yet. =(

 

[TX Speed Demon]

Don't buy the perrin intake. Why do you think I sold mine for only $65? It had a torn filter (noted in sale thread) and didn't perform as well as the injen did.

There's a 40 degree differance in intake temperatures between the Injen CAI and the Perrin SRI at the same outside temperature. Perrin registered at ~105 while the injen regestered at ~65 while cruising at 80mph. test was done on different cars, but only one night apart and under similar weather conditions.

That's a big enough differance for your ECU to retard timing and reduce performance with the SRI. If you put the IAT sensor in the perrin intake the differance will not be as drastic, but will be noticable, especially in humid Florida weather.

I would not go back to an SRI untill after I have EMS to fully control timing.

 

[Zhan]

Don't buy the perrin intake. Why do you think I sold mine for only $65? It had a torn filter (noted in sale thread) and didn't perform as well as the injen did.

There's a 40 degree differance in intake temperatures between the Injen CAI and the Perrin SRI at the same outside temperature. Perrin registered at ~105 while the injen regestered at ~65 while cruising at 80mph. test was done on different cars, but only one night apart and under similar weather conditions.

That's a big enough differance for your ECU to retard timing and reduce performance with the SRI. If you put the IAT sensor in the perrin intake the differance will not be as drastic, but will be noticable, especially in humid Florida weather.

I would not go back to an SRI untill after I have EMS to fully control timing.

I have some Ebay piping + filter that sticks onto the MAF which can let me relocate the filter further away from the radiator fans and over the wheel well hole.

And in humid rainy Florida weather I feel a CAI is kind of dangerous.

 

[Scott]

Don't buy the perrin intake. Why do you think I sold mine for only $65? It had a torn filter (noted in sale thread) and didn't perform as well as the injen did.

There's a 40 degree differance in intake temperatures between the Injen CAI and the Perrin SRI at the same outside temperature. Perrin registered at ~105 while the injen regestered at ~65 while cruising at 80mph. test was done on different cars, but only one night apart and under similar weather conditions.

That's a big enough differance for your ECU to retard timing and reduce performance with the SRI. If you put the IAT sensor in the perrin intake the differance will not be as drastic, but will be noticable, especially in humid Florida weather.

I would not go back to an SRI untill after I have EMS to fully control timing.

I don't think the Perrin i bought off you is all that bad. Sure, I had to replace the filter, but there's other things to consider besides temperature when choosing an intake.

One example is intake velocity...
Get two straws. One that's normal length, and one that's 4 times longer. Now tell me which one is easier to drink through. A shorter pipe will pull air more easily.

Another example is basic physics dealing with friction.
Friction causes heat. Even air hitting the inside walls of a pipe causes friction. So, as the air has to travel through the longer metal pipe, with more bends in it, the particles heat up more, expand, and thus lose velocity.

Another important thing in our area...
Florida floods easily. In many places across our wonderful state, there's improper water drainage. Couple that with the atrocious conditions of some of our roads and highways, it's very easy to be driving what you think is a tiny puddle, only to find out it's a foot deep in the middle, and you've just swallowed a giant gob of water through that pipe.

To me, the meager benefits of slightly cooler air going into the filter, are not worth the extra $150, and added risk of snapping rods like twigs just by driving through a big puddle. Also, I have yet to see a side-by-side dyno with both intakes on the same car, same dyno, and on the same day...so I'd reserve any judgement that one's far superior to the other until I could see it with my own eyes.

 

[Zhan]

Actually, I just read an interesting "article" on intake theory: http://www.clubprotege.com/forum/showthread.php?t=144&highlight=intake+diameter

If I get one of these CAIs, I think what I will do is run it as a CAI for one week, then an SRI for the second week (and maybe repeat this for 2 more weeks) and see what my butt likes best.

 

[Scott]

I would be genuinely surprised to see any real noticeable difference between the two setups.

You're going to have to help me out on that other thread. I'm not a member of that forum and it won't let me register for some reason.

 

[Zhan]

Well if I don't notice anything different I'll stick with the short-ram setup for ease and lack of hydrolock. =)

The article is really long, and I can't say it has really much to do with the topic at hand, I just mentioned it off-hand. The person who posted the article does mention, "A longer tube creates faster air flow compared to a short tube and peak volumetric efficiency will occur at an earlier or lower rpm. This is why a longer CAI has an advantage in the midrange over a short ram, regardless of intake temperature differences," but I don't think that's part of the "tech" part of the article written by someone else who's taken classes in fluid dynamics. The rest mainly discusses the diameter of the tubing rather than the length, so it doesn't really apply to the SRI vs CAI argument. It's rather long, and I've got to go soon. But maybe I can summarize it later when I get back. You can't register, though? =(

 

[Scott]

Nope. Whenever I click register, it gives me a 404 notice.