So, my IMRC went bad, so I thought i would try something before buying a new one.
I removed the plug going into it, then opened the intake manifold and removed the butterflies completely out of the intake manifold.

i have driven the car and i see no torque loss, and the rpms gain quicker.
Obviously it is hard to say right now if it is just better than the bad IMRC or if it is better than ever, but all i know is that I have no complaints with them out.

I wonder if i should leave the plug undone or plug it back in even though the butterflies are out?

 

feel it or not you WILL loose low end torque period !

 

When mine went out I just pinned it open with a zip tie. I did not like the loss at high rpm, thats why I pinned it open. But I could tell the loss at the low end. I left it that way for a few weeks until i got a new one from Acura.

I would plug it back in if I were you. Just for the fact that you dont want a bunch of dirt in the plug end. Other then that I dont see why it would hurt anything.

 

The reason you feel as though it added power was because its now open, not stuck closed throughout the whole rev range.

Its been dyno proven that you do lose torque down low with it open.

 

oh i know. I haven't seen the thread, but i realize that from being on here enough. I was just stating that it wasnt significant enough for me to really notice.
Now after driving it more tonight, i seem to see a difference in the 2500-3500rpm range in like 2nd and 3rd, but other than that, it pulls pretty good.

feel it or not you WILL loose low end torque period !
type-r, are you mad?...lol

thanks guys

 

lol no why would u think that ? main thing is i dont want you or anyone else to think this is a good thing ...btw if ur handy you can possibly fix ur acctuator ... i did ... first couple teeth were just broken off ... shimmed it till it grabbed ... another way u could do this is to adjust ur cable so as to achieve the same thing

 

yes i am, and i was actually thinking of doing that today.

so its really that bad to leave these butterflies out huh?

its so hard to really see any difference cause my car in the past 2-3 months seems to have lost its torque and acceleration anyways. im really getting concerned that either my clutch or flywheel is bad or my car is just loosing horsepower somewhere because it seemed to be quicker without any mods...
maybe a valve adjustment is needed????

oh well, another topic...lol
thanks man

 

maybe ur acctuator has been bad or intermitant for a long time

 

If you really want answers on this speak too p2r. If you ask on here it will all be negative responses. It all depends on how ur car is setup and how you want to use it really, in your case id say leave it on.

 

appreciate it..
i plan on most likely replacing it and putting the butterflies back in, just wanted to see how it is without it and i dont have any complaints.
anyways, isnt there horsepower gains but torque loss down low? that is the same thing with most of the breather mods on this car.

im looking to achieve the 260hp/230lb to the wheels though.
Headers and pullies are next on the list

 

Breather mods should increase both hp and tq, not just 1 to sacrifice other. Butterfly delete isn't a breather mod really, it is just a flap that opens up. It is also designed with a stock motor in mind. I don't know if p2r saw gains or if it is just one more thing that can malfunction on a race car so they did without it(plus cheaper to not use and lighter).

 

^^^ i concur exactly
thanks

 

I wouldn't consider this a breather mod. It's inside of the manifold and doesn't increase the efficiency of the engine when it comes to air drawing and expulsion. It changes the vacuum pressure and internal turbulence of the engine. It works in conjunction with the cams to provide the most efficient airflow in reference to rpm's that's why removing it makes you "lose" power down low.

Having it non-working makes it "lose" power up top. This doesn't actually give any power gains if you are removing a perfectly functioning part on a stock ecu vehicle.

 

Bottom line you do lose TQ on the low end

 

from my thread
https://acurazine.com/forums/newrepl...ply&p=11214852

 

Wow, a 13hp loss from a non functioning IMRC. Makes me want to yank mine out now since mine has been closed since I got the blower but I know that wouldn't be a good idea...

 

i dont think the same rules apply to a FI setup. you are forcing air in there so the imrc being closed wont really affect the airflow rate

 

I think it would be similar. The airflow is still being restricted while the IMRC is closed even though its being forced in there. I really need to get off my azz and get this stuff done so I can find out

 

I think we can agree that Acura put the IMRC in there to increase power, not lower it. It increases low end torque without sacrificing high end power.

 

i agree with keeping the imrc on, im sure Acura did this for a reason.
it just is always gonna be a problem, and my car runs great with it off right now...just sayin..lol

 

is that 10whp and 20lbft loss between 3500-4500 rpm?
damn thats a lot but it comes back to basically even.
guess i need to get my shit working again...lol

 

Noone is denying why Acura did it. It is whether a non-stock engine that is pnp'd is better off with or without it, once you change the airflow patterns of the engine.

 

i was about as non stock as you get ... and this i assure you... pinned shut i lost significant hi end hp/lb.ft. ...pinned open i lost similarly equal hp/lb.ft. down low ...

 

you gonna go to the desoto track anytime soon.
i would love to go and see your car run brother...lmk

my NEW imrc will be back on when i finish doing the back three spark plugs this weekend....

 

found the Imrc actuator motor on the black market for $50 new!!!
it is for 01-03 automatic, but arent they all the same for our car?
please let me know asap so i can get it!!!

 

i believe this is the part # and it is universal to both trannys
17151-PFW-J02

 

When I ordered mine from Pikes Peak Acura I don't remember them asking about the tranny. Then again maybe thew just knew since it was an 01. I dont see why there would be any diff at all.

 

It's universal

 

its in my possetion.
will install the new actuator, and hopefully feel the pull...lol

 

Well, the new actuator broke in my hands cause its a cheap pos, but i fixed the old one hopefully and now its working along with my rear e3 spark plugs.
Xs headers will be installed next weekend, then the track again...oh yeah...lol

 

If it broke in your hands it means your hand sucks, not the part. :p

 

FUNNY..

Hopefully the one i have lasts, but i really dont feel a difference at all with it back on and working..i guess it will take the ecu a few days to straighten everything back out..
oh well, proof is in the dyno

 

I have to resurrect this thread. Reason being: Reese. He is the only one that has proof of his 103-104mph traps and is one of the only ones that has the butterfly delete. He has a ported intake manifold and runners as well. He didn't seem to lose any low end torque with his 82-83mph traps in the 1/8th. So I have to question this, because my traps are low considering my mods.

Being that he is the only one producing traps near 104mph, I have to assume that this mod really works. With 82-83mph traps in the 1/8th, he couldn't have possibly lost any low end. Those are near 370z 1/8th traps. Anyone have any insight on this?

 

Ive seen dyno#'s with some one with it deleted and with it on and it lost alot of low end power with it off

 

I removed mine but also did other mods. Car feels stronger at every rpm level. I can still spin tires in 1st and 2nd gear. The only torque loss is below 2500 rpm and I keep revs above that. I dont see this affecting drag times. It would be more like if you are driving slow at 2k rpm then try to gun it.

 

^^ What other mods? I have a ported IM so I figured I might as well try this. If they don't work I can always put them back in, doesn't seem too tough or time consuming.

 

Do you have ported runners and a bored tb also. Without this the ported IM won't do much.

Other mods I did was valve adjustment, 08 tl-s exhaust valve springs, p2r tb spacer, p2r thermal gaskets, p2r plenums, 01 mdx intake horns, ported runners & IM, bored tb, IMRC and air assist to runner delete.

Other mods I've had done include underdrive pulley, comptech icebox, xlr8 cat, comptech headers.

The only other things would be to get custom headers made, custom exhaust and tune. If that isn't enough power for you then do the 3.6 build, nitrous, turbo or s/c.

I did my build based on the lack of tuning. I didn't want to deal with headache of tuning s/c or turbo. I personally am not a fan of nitrous. I also don't wanna be guinea pig in figuring out how to get aem ems to work. With weight reduction I think I will be happy with it.