View Poll Results: IMRC Status for FI CL's
Connected and functional
6
50.00%
DISconnected, stays closed.
6
50.00%
Voters: 12. You may not vote on this poll
Boosted CL's please answer
Thread Starter
ex 6 Speed owner :(
Joined: Jun 2002
Posts: 960
Likes: 0
From: Huntington Beach, CA
Boosted CL's please answer
For those of you who are Forcing Induction, what is the status of your IMRC? Personally I still have mine connected but am thinking about disconnecting it in lieu of the recent posts...
Originally Posted by Chemmech
Removed 
LOL... I saw that you posted and I was like, "wait, where's the poll option for I don't have one anymore" LOL
Soon to be in the "removed" club.
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Safety Car
Joined: Aug 2002
Posts: 4,910
Likes: 1
From: So Cal
Okay... I just went and tried it out both ways. It's significantly quicker with the IMRC connected and functional. It rips the tires loose in 2nd with it connected. With it disconnected, it just sorta revs up.
I do hear the occasional *ping* at the VTEC changeover once in a way... but I have retarded a LOT of timing.
I do hear the occasional *ping* at the VTEC changeover once in a way... but I have retarded a LOT of timing.
Thread Starter
ex 6 Speed owner :(
Joined: Jun 2002
Posts: 960
Likes: 0
From: Huntington Beach, CA
Originally Posted by allmotor_2000
Okay... I just went and tried it out both ways. It's significantly quicker with the IMRC connected and functional. It rips the tires loose in 2nd with it connected. With it disconnected, it just sorta revs up.
I do hear the occasional *ping* at the VTEC changeover once in a way... but I have retarded a LOT of timing.
I do hear the occasional *ping* at the VTEC changeover once in a way... but I have retarded a LOT of timing.
Parting out 02 Type S :(
Joined: Mar 2001
Posts: 1,299
Likes: 0
From: LA,CA
I concur with allmotor's findings. However, i conducted my test when my FP wasnt right, but i still felt a difference. Im gonna disconnect it again since the car is running well, but i think there will be a power loss.
Finally, when i dyno, i might just disconnect it for one of the runs to see if it does make a difference. I will post on that when it happens in a few weeks.
Finally, when i dyno, i might just disconnect it for one of the runs to see if it does make a difference. I will post on that when it happens in a few weeks.
Originally Posted by dfv3.2CL-S
Sorry for the stupid question, but what is the IMRC in simple terms.
I would explain but it's nothing that hasnt' been covered 800 times already on both the CL and TL forum. Try a search.
I ran mine at the track several times with it connected and disconnected. It was about 1-2 tenths quicker connected. Mine is staying connected. I do get some light pinging. Seems worse when it gets colder outside.
Suzuka Master
Joined: Sep 2000
Posts: 9,431
Likes: 0
From: Woodstock, GA
I had mine disconnected since early on.
Ramanan, I think I know why you are seeing such a difference. Both Brad's and my dyno tests showed little difference. But then again, that was just with the FPR adding fuel. It could potentially be that yours is tuned well enough using the E-Manage that there is no benefit as you can get the extra fuel where it is needed. With it connected with just the FPR being used, it would lean out just after the VTEC change over; a non-issue for you.
So IMO, without the E-Manage it shoudl help. But with the E-Manage you can tune out the lean condition.
Just FYI, below is Brad's dyno showing the differences. Although there were some it wasn't enough to keep having knock.
Ramanan, I think I know why you are seeing such a difference. Both Brad's and my dyno tests showed little difference. But then again, that was just with the FPR adding fuel. It could potentially be that yours is tuned well enough using the E-Manage that there is no benefit as you can get the extra fuel where it is needed. With it connected with just the FPR being used, it would lean out just after the VTEC change over; a non-issue for you.
So IMO, without the E-Manage it shoudl help. But with the E-Manage you can tune out the lean condition.
Just FYI, below is Brad's dyno showing the differences. Although there were some it wasn't enough to keep having knock.
Safety Car
Joined: Aug 2002
Posts: 4,910
Likes: 1
From: So Cal
Possibly true. I have my E-manage tuned to give a stable A/F at all times under boost. In fact I start richening things up just before boost (to eliminate the 'turn-on' boost condition you probably know about).
However, why would the car lean out before the VTEC changeover with the IMRC connected? I know that the car adds a LOT of fuel as it transitions into VTEC, but how does keeping the IMRC closed prevent the car from leaning out before VTEC? One answer is that less air requires less fuel. That also means that you would lose power before the VTEC changeover!?!
However, why would the car lean out before the VTEC changeover with the IMRC connected? I know that the car adds a LOT of fuel as it transitions into VTEC, but how does keeping the IMRC closed prevent the car from leaning out before VTEC? One answer is that less air requires less fuel. That also means that you would lose power before the VTEC changeover!?!
Suzuka Master
Joined: Sep 2000
Posts: 9,431
Likes: 0
From: Woodstock, GA
Originally Posted by allmotor_2000
However, why would the car lean out before the VTEC changeover with the IMRC connected? I know that the car adds a LOT of fuel as it transitions into VTEC, but how does keeping the IMRC closed prevent the car from leaning out before VTEC? One answer is that less air requires less fuel. That also means that you would lose power before the VTEC changeover!?!
Correct, there was less air going in with it disconnected and less potential power. But with it going lean and knock occuring the ECU was killing timing negating the potential power increase. Disconnecting it limited the air input potential; hence greater boost numbers with the SC, but it stayed at a reasonable A/F ratio and no ECU timing killing knock.
Originally Posted by scalbert
It doesn't lean out before the change over; it does just after at about 5000 RPM.
Correct, there was less air going in with it disconnected and less potential power. But with it going lean and knock occuring the ECU was killing timing negating the potential power increase. Disconnecting it limited the air input potential; hence greater boost numbers with the SC, but it stayed at a reasonable A/F ratio and no ECU timing killing knock.
Correct, there was less air going in with it disconnected and less potential power. But with it going lean and knock occuring the ECU was killing timing negating the potential power increase. Disconnecting it limited the air input potential; hence greater boost numbers with the SC, but it stayed at a reasonable A/F ratio and no ECU timing killing knock.
FI'
great debate good info by people who know what they doing.
spread the knowledege.
Good work
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