Whats the m2 website?

 

www.m2performance.com
Is the Petit an airbox intake? (not open element "hot air")

 

My pettit is awesome.

 

i was going to get the one from rotary rliability and racing. similar to pettit's but half the price. check it out.
http://rotaryracing.com/ff_featured_items.htm

 

ive seen the RRR intake setup...it looks good on the car and seems to be as functional as the pettit.

so is no one interested in swapping my fugly pettit for a shiny m2 box?

please...

hahahhaha


j

 

I had the Pettit and switched to M2. I wanted colder air.

I have an M2 radiator, and originally I was having fitment problems. Ideally, you need to drop the radiator a little by modifying the upper mounts so the rad sits lower.

However, through careful fitting and trimming of the hoses, you can get the M2 to fit without modifying the radiator.

 

as far as a constant flow of air over the air filters goes, it seems that a good bit of that air on the Pettit intake could be hot engine air. With the M2 box, it sucks air in from straight under the car, and with the vacumm suction of a turbo intake, you shouldn't have to worry about having a constant flow of air over the filters as opposed to air getting trapped in a box, right??

 

this is why m2>pettit

http://www.scuderiaciriani.com/rx7/intake.html#COM

STOCK M2 PETTIT
IDLE 147.4 137.5 162.3
HIGHWAY 97.7 112.5 124.2
VALLEY 90.8 104.2 122.9


I have the pettit and tested the air temp right around the filters and as soon as the rad fans start blowing that heat shield is basically useless because the air just blows right around it. at a standstill the air around the filters heats up *very* quickly. i fabricated another heatshield to try and stop it but for the price difference either of the box intakes is the better value...

 

the air on the intake side is way cooler standing still (with fans on)...I haven't tested it while rolling, but imagine it's even cooler.

My heat shield works...and yes it's an eye sore. I have descent numbers however.

 

how are you testing the intake air? if its with the hood up and sticking your hand in you can imagine how thats not very accurate. quick excerpt from the scuderia site:

"Do not go with an open type system such as the Pettit/N-Tech. There is no way in hell that it will draw in fresh air. They will draw air from the engine compartment. They will not magically only use the air that flows up from under the nose of the car. Also, this air from under the nose of the car would be ok, except that they are depending on ram air. You just won't get much ram air from there. It can't come from below because of the engine under cover. It has to come from the nose of the car, make a left hand turn at the radiator and squeeze between the crack between the radiator and the frame rail.

Let me reiterate. Don't buy the Pettit/N-Tech systems if you want fresh air. They should not be calling them Fresh/Cold Air Intakes. If they had ever tested the intake temps they would know better. I'm sure these units are great for getting more/less restrictive air, but they should be calling them something else. Even the manufacturers of the sealed boxes (M2/Rx7Fashion) should probably change the name, as they bring in warmer air than stock. "

 

I would go with the M2 personally...Well, that's if you don't plan on upgrading to a FMIC or large SMIC...

IMO, although it may work well, the Pettit cold air intake looks like a ghetto heat shield with K&N filters. TKT all you want...I am sticking with my Airinx.

 

apnea...those filters suck air from the hottest part of the engine bay...at least the pettit is stuffed all the way forward to the nose. yer shooting yourself in the foot using those things. the goal is to lower the intake temps...not increase them.




will someone please trade me an m2 box for my pettit POS. hahahahahhaha...


j

 

I agree they do suck some hot air...I guess it's not so much of a "I will stick with them" it's more of a "I have to stick with them" Have you seen how crammed it is when you install a FMIC? It's nuts....I tried to make my Apexis fit but no go. I have thought about making a heat shield for them but I probably wont be using them forever since I intend to join the singles club some time in the near future.

Someone need to invent a cold air box for FMICs.

 

So what air filters work with a FMIC and which ones work with a SMIC?

 

airborne is right, the box type kits do not have a direct source of air, due to the underbody panel. Also, you guys with open filters under the hood need to remember what type of suction a turbo engine creates, not to mention the type of suction any engine creates while cruising. You are definetly getting hot air from the engine bay sucked in..
So I guess the question is what is the best cold air intake setup? How about racing beats kit that draws in air from the nose?

 

At high boost, the RB kit can pull warm air back thru a stock intercooler. Not a very good design.

 

As AdamC just pointed out, even the front of the nose intakes have flaws. Even though my PFS intake has that same flaw, I still think it's much better than an open intake and I think it can receive more air through "ram air" than the cold-air box style intakes. No proof of that of course, it's just wishful thinking.

Actually, the only intake I've seen so far that may be nearly perfect is Rotary Extreme's new intake meant to work the V-mount system. That sucker gets a TON of fresh air from the nose and as such is not likely to draw hot air back through the intercooler. It also is completely shielded from drawing in engine compartment air.

Of course, you do have to buy the $2300 V-mount set-up for that intake to work....

 

A lot of people look at the stock airbox in a negative manner. If you have room to keep it, it can work nicely with a little modification. I cut a hole in the bottom of the box, and built a shield to keep the hot air out. My stock box now pulls air from the original ducting, the front of the car, and under the car. I think it works better than the M2 or others like it.

Adam

 

The stock airbox (when opened up) works very well but I wanted a bigger SMIC.

For those of you who never saw Zerobanger's post, I'll reiterate what AdamC just said:

Zerobanger has done over 80 drag strip runs and made the discovery that his trap speeds were consistently lower when he changed from an "opened up" stock box to a cold-air box style intake (I won't mention whose but they all work the same anyway). His trap speeds went back up to where they were before when he fixed up a tube and inlet to direct "ram air" to the opening of the cold-air box. This is probably due to the fact that the air inlet to the cold-air boxes is restrictive and the stock box keeps intake air the coldest of any intake.

The point is, that if you are still running a stock-size intercooler, buying ANY intake is a waste of money compared to modifying the stock box.

 

rynberg, couldn't you adapt your SMIC duct to flow air into the intake?

Like cut a hole, attach some sheet metal, and duct it right into the RE cold air intake.

I love the look of that giant gaping intake hole.

 

seems like in dryer cooler air, like here in Colorado, maybe the M2 would be the best, although it does not function like a ram air kit like the stock box. The racing beat system still looks pretty good as well because it at least pulls in air from the nose. Maybe a homemade kit is the way to go, with some special large diameter hose routing air to the air box.

 

Very funny you should mention that because I have the PFS SMIC and intake and that's EXACTLY how it works! For that matter, the stock setup already does that, just not very well.

BTW, you can't keep the stock airbox with any IC other than stock, SR, Blitz, or Greddy, which is why I don't have mine anymore....

 

How do you like the PFS? I don't know if I want to spend 3500 bucks on the V-Mount quite yet

 

the numbers from the scuderia website do give evidence on the stock airbox's ability to draw cold air so modifying it is a fine idea, but could someone come up with equally good data on a modded stock airbox? go to radioshack and pick up this bad boy for $20

http://www.radioshack.com/product.as...5Fid=63%2D1035

stick the sensor inside the box and lets see what ya get.

**Important Edit**
Make sure you put it on the side of the filter towards the outside air, not on the side closer to the engine so you can be certain it won't get sucked in...

 

looks like the stock box pulls in the coldest air, but for increased air flow, it is better to just modify it rather than spend 500 bucks on an aftermarket piece