Got Alta CAI and Unichip installed in my O5 MCS. Am I missing something?

 

Yea, the Pulley.

 

You really need the pulley to get more out of your CAI and Unichip. Get an exhaust like a Borla street and you should be pretty happy.

I did my intake, pulley and exhaust on the same day and it was a dramatic difference. the Unichip came a little later

 

even w/ the CAI and chip it should be enough to feel better throttle response.. you will not feel night/day performance of course...

what map do you have running on your UNICHIP?

///Gilbert

 

The actual hp addition of a Intake or chip won't be enough for you to notice much. You will on a dyno or a 1/4 mile time but not much from normal driving. You should noticed a difference in throttle response instantly.

 

It supposed to be written for the alta. I've not tried the other setting, but according to instructions, "light off" means more conservative.

 

He is right too!!!

 

light ON = MORE FUN, MORE JUICE = MORE GO FAST

 

 

Seems funny, our intake by itself, no ECU is a 10WHP gain. The unichip is supposed to give you about 5HP more than other chips, so somewhere in the 10WHP range. Even 10 is very noticable, 20 is very noticalbe. Where do you live and what kind of gas do you have there?

 

would you please post the dyno runs showing a 10 hp gain from your intake. please also indicate whether the tests were run with the hood open or the hood closed.

 

We always do it with the hood open, and fan on IC. This keeps it consistant from run to run. Hood closed on 90% of cars is not a good idea.
This is our run we did long long ago. Completely stock car, engine wise.

 

it isn't a fair test to compare the stock inlet with all of its enclosure in place (which doesn't change when the hood is open) to yours with the top of your airbox completely removed by having the hood open. you have lessened the real in-use flow losses to yours by having the hood open.

test them both with the hood closed and see if you get the same result.

 

Oh! You really need to have the pulley with the Unichip and the CAI! You will really love that combo! :smile:


Clover

 

Maybe if they leave the hood open but cover the intake from the air being blown in.

 

or leave off the "bottom" of the stock airbox, like the idea in the "cheapest cai" thread which maybe should be "the cheapest hai" thread..............

https://www.northamericanmotoring.co...ad.php?t=43257

 

I agree with flyboy2160.

I don't know about you guys, but I don't drive with the hood open either...

 

flyboy2160,
The stock air box gets air from the front of the car, and from the really small hole at the back. With the hood open and with the hood closed is is the same, and maybe better open because the front scoop is much more open. I say more open because the grill acually blocks quite a bit of the scoop (fron direct air)when it is closed.

Our intake gets air from the front of the car and the huge gapping hole from the missing air box wall. Since both these holes are so huge there shouldn't be any difference with the hood open or closed. With the hood closed, the air from the front and the air from the window scoop are plenty big enough to not cause any restriction. From a Cool air stand point, the air it gets on the dyno with the hood open or closed is going to be the same. The stock box will be sucking most of its air from the front scoop (which is nice cool air) and ours will be getting most of its from the window (nice cool air also.

From this we can deduct hood open and hood closed doesn't really effect the HP. With the hood open though we can place a fan on the IC itself to keep the air flow more consistant. Generally the fans dyno shops use are not powerful enought to simulate 30+MPH winds so having the hood closed and using these fans to cool the IC isn't enough. It is enough to keep the coolant in check, just not the IC.

uea minis idea about the cover would prove the hood down or up is better, but with large window opening it really shouln't make much difference.

Regarding the Cheapest HAI,
This is a good idea, but the Intake is still breathing through a small filter. Even if you install a foam filter, the surface area is pretty small compared to the cone filters on our intakes. I am sure this gains some HP just because the intake gets to breathe through a much larger opening compared to the front scoop but how much, that i would like to see.

 

"The stock air box gets air from the front of the car....
Our intake gets air from the front of the car and the huge gapping hole from the missing air box wall. Since both these holes are so huge there shouldn't be any difference with the hood open or closed...."


your website shows that you use the same stock front opening, so this front hole isn't "huge" compared to stock, it's the same!!! the rear "hole" is huge compared to stock, but with the hood closed the path is much more open than with it closed.


"From this we can deduct hood open and hood closed doesn't really effect the HP."

i disagree as i disagreed with the recent forge ic test with the hood open. their ic blocks most of the ic slot, but it tested "good" with the hood open.


"This is a good idea, but the Intake is still breathing through a small filter. Even if you install a foam filter, the surface area is pretty small compared to the cone filters on our intakes. I am sure this gains some HP just because the intake gets to breathe through a much larger opening compared to the front scoop but how much, that i would like to see."

the previously reported pressure drops across the stock filter of ~.1 psi indicate that there isn't much to be gained in terms of pressure by changing the filter. about 2 years ago, a poster on mini2 REMOVED THE STOCK mcs filter completely. as i recall, he noted a 1-2 hp gain, which jives nicely with the small pressure drops across the filter. (and is probably well within the margin for error of any dyno test.)

the 10-12 hp improvement claims just don't jive with other data.

 

Have you ever seen an alta intake installed? The hole in the back alone can probably flow three times the entire stock inlet. Plus, when the hood is closed the air is pressurized. how do you think air gets forced into the cabin when the fan is turned off, but the vent is open.

Alta, please do not respond to this guy. It is very sad to see this board get reduced to the lowest common denominator.

 

Sorry but I think he is trying to get a point through and learn something along the way.
Alta can handle the pressure.. very intelligent if I may add.

 

I don't think there is any pressure on alta.

May I remind everyone this is an INTAKE for gods sake! Learning is great and asking questions is a good way to do it, but threads like this are coming off as accusatory rather than educational.

Oh yeah, IT'S AN INTAKE! This is like a group of runners talking about which foods to eat, excercises to do, and which shoes to wear to run faster and then someone steers the whole conversation towards how his shoe laces don't have the optimum weight to strength ratio to cut another tenth from his 100 meter dash.

Thank you, Goodbye.

 

The guy is just asking genuine questions as far as I can see!!!


"Dont encourage Manufactores not to answer questions" There is way to much of that going on already........ I commend Alta for joining in these discussions and answering questions!

 

Hood open or closed, as long as the runs ( with and without) are both run the same way, the relative power difference is valid.

 

My shoe strings only cost $.39 does that mean I won't win the race ...damn