johnnylee3

are you talking about this water bag thing that goes over the filter?

johnnylee3

if so, then you would probably have to take off the front bumper. o yea, for those of you who plan on putting on the aem intake, the aem instruction is really bad, they make you do alot of unnecessary stuff. follow the instructions of how to take out the actual intake, but all you really need to take off after that is the front bumper and one other part. there's no need to take off the wheels and unplug the electronics inside the wheel and underneath the car.

lurch519

the black back is not actually a water bag, that is a filter cover that helps keep larger debris from the filter, basically a prefilter. you can choose to put it on or leave it off, i left mine off.

johnnylee3

btw, lurch519 do you already have a bypass valve on yours? cuz i'm thinking i'll really need one down the line when i starts raining

lurch519

no i do not, and i will not be putting one on. i have driven through torrential downpours in my old civic, which was lowered 2", without a bypass valve on, with zero problems. as long as you are not driving though deep (by deep i mean in excess of 6") puddles or standing water, you should have no problems. the biggest problem is people driving through standing water or deep puddles, and keeping the rpms up, when you do this and have the filter submerged up to the intake piping, at the higher rpms you are sucking water up the piping just like a straw, which is bad for the motor.

again, rain will not affect your car with an aem cai. it is standing deep water that is a concern.

johnnylee3

icic, thanx for the info man. it's just cuz our filter is so exposed that i get kinda worried about it. it's kind of like i just want a bypass for the winter season and take it off for the summer.

crossbow

And you should never drive through standing water period to begin with (of any depth). Its funny that when people come across an area with water deep enough to kill the cars, they fail to notice the other dead cars on the side of the road, and drive through anyway .

If your in 12-18 inches of water, your screwed regardless of whether or not you have an intake. The amount of useless deaths caused by people trying to drive through standing water is depressing. Street flooded? Turn around and find another route!

Mr.Wankel

I was reading this forum and somebody said that you had to take the bumper off everytime you have to clean the filter. Is this true? I live in the desert where dust is pretty prevelant and I don't think cleaning it once a year is going to be sufficient. And I don't want to be taking my bumper off to much as it will eventually wear out the clips or screws holding it in place.

lurch519

i havent looked too close, but i believe you can just remove the big plastic piece that sits underneath the engine.

eclps0

NO you do not need to take off the bumper I have taking off my filter about 5 times with the bumper on. Also there was a sick thunder storm with a couple of inches of water i did not hydro lock then engine and no its ok that the filter gets soak and wet..... :D

lurch519

well, finally had a chance to get on the rollers with the aem. :D :D

so far mods are:

aem cai
royal purple for entire drive train (5w20 in crankcase, and 75w90 in trans and diff)
custom engine ground kit

and the numbers are...............


181.3 hp and 136 torque.

evidence below

eclps0

you gained 1.2 hp

lurch519

im not sure what i gained, as i didnt have an accurate before and after. those were 3 4th gear runs today, all with the aem and etc

eclps0

ohh i thought you only gained like 1.2.. with cia you get more hp than what the dyno shows.

PoLaK

iTrader: (1)

Hey that redline seems to have shown similar gains at 6550 to 6750 do you happen to have the dynoRun file for that red line, or could you call the shop and ask them to email it to you, if you can I'll make a cool little comparo.

lurch519

lol, sorry polak, dont have a number to the shop. was at a car show here in delaware and they had a dyno set up. no number on the sheet, nothing.

are you talking about the quick dip then rise right at that range. thats probably from the intake ports reconfiguring if i remember correctly. secondary's open around 3700, then theres some kind of crosslink port that opens i believe right around the 6200 point, then the tertiary's open, i think thats right

DARKMAZ8

wouldn't the length of this intake decrease torque?

PoLaK

iTrader: (1)

huh, whats your logic behind that ...? if your decreasing torque your loosing horsepower since torque is proportional to HP....

or are your mearly trying to snide in that stock is still the holy grail of intakes for the rx-8...? I was like you till I dyno'd REVI and installed the Ram Air soon afterwards I've leaned out my AFR's significantly for just intake mods.

StealthFox

quite the logical engineer we have here don't we

therm8

Calm down people. Good grief, heaven forbid someone doesn't praise the almighty AEM Perhaps he meant low end torque...

Intake tract length and diameter changes definately shift the old torque curve around a bit. Most CAI installations result in a loss of low end power while gaining in the upper end.

lurch519

actually, a longer intake runner should bump up the low end torque due to resonant frequency. look at the integra with the dual intake runner lengths. long runners for low rpm, short runners for high rpm.

when the intake ports open on an engine, you get a vacuum wave traveling up the intake tube, when it gets to the end, it reflects back as a compression wave. at different rpms, you will get different volumetric efficiences, due the compression wave timing reaching the intake port and pushing a bit more air into the engine.

DARKMAZ8

Thank you...this is exactly what I ment.

PoLaK

iTrader: (1)

Well my apologizes in this case, however it's incorrect... lurch519's explaination longer runners will give you more lowend short ones for highend, although with all the quirks with the MAF in the 8 I find it hard to make such generalizations.

DARKMAZ8

Wouldn't the diameter of pipe also contribute to the gains. Now that I think of it, The CAI with 3" wide piping will yeild more high end and vice versa. The Aem piping looks like 2.25" so it should increase torque but might not breath as well in the high rpm range.

lurch519

the aem is actually bigger in diameter than the throttle body itself. the section where the maf goes is about the same diameter as the stock maf pipe.

aem piping ranges from about 3" to 3.5 inches.