Procharger Stage 2 Install

[proamas]

I don't think the IMRC's help the cause, but it's also an issue with the actual and predictive throttle angles, since it's always been guess and check with the coyote platform on copperhead and tricor. As the previous gen coyote has this issue as well, most tuner's have just "figured out the angles" though.

The way I understand it is, you get information from the driver demand torque source, which registers to a map point, which also has an inverse. The demand requests X amount of torque at the engine, and an inverse value which is an airflow amount (which is a combo of many things, imrc and cam timing are a few of them), which also then maps to a predictive throttle angle. If the actual angle isn't matching, you'll get a bucking.

This angle is derived from an IMRC opening value, throttle angle value. Adding boost to the mix that isn't tuned for essentially closes the throttle as it is exceeding it's mapped point airflow amount, so it eventually says "ok, time to close the throttle" even though theres more air coming.

This was a super elementary way of explaining it.

The answer may be easy, but how does Whipple handle this?

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[Process]

The answer may be easy, but how does Whipple handle this?

Whipple and Roush had issues early on, with the controls of the "older gt500" style throttle bodies.

They are zero'ing out the IMRC tables and deleting the corresponding map point, and adjusting cam angles to compensate. If I had to guess I'd bet I'd be very close to saying they are using a similar angle from an 11-14 car, and adjusting for the larger cam sizes of the 2015. Whipple and Roush remove the IMRC's.

This same fix could apply to a procharger or vortech if you wanted it to. Or you can just adjust the imrc and throttle angle tables appropriately. This is easier said than done as logging the proper parameter is a guessing game, and always has been.

 

[proamas]

Whipple and Roush had issues early on, with the controls of the "older gt500" style throttle bodies.

They are zero'ing out the IMRC tables and deleting the corresponding map point, and adjusting cam angles to compensate. If I had to guess I'd bet I'd be very close to saying they are using a similar angle from an 11-14 car, and adjusting for the larger cam sizes of the 2015. Whipple and Roush remove the IMRC's.

This same fix could apply to a procharger or vortech if you wanted it to. Or you can just adjust the imrc and throttle angle tables appropriately. This is easier said than done as logging the proper parameter is a guessing game, and always has been.

Thanks for the answer Process, what are the advantages or disadvantages of taking the IMRC out though? Any power loss associated with just deleting them?

 

[ATTFighter]

Kinda sucks all these issues are going on, hope you all get it worked out guess that's what happens with a new platform. I guess I am going to wait a little longer till I order mine now for tuning and fitment issues to get worked out.

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[Process]

Thanks for the answer Process, what are the advantages or disadvantages of taking the IMRC out though? Any power loss associated with just deleting them?

Idea behind them is to give you the benefits of a short and long runner intake in one device. Close them at low speed for low end torque, open them up on the top end for high end hp. With boost, who cares is my opinion, they're pretty useless.

the issue centri guys are having is, the imrc is mapped to stay partially opened, or even closed when some cars are at like 0 vacuum and boost borderline, so it's causing an interference. Now wide open, the imrc is opened and doesn't present a problem.

 

[proamas]

Idea behind them is to give you the benefits of a short and long runner intake in one device. Close them at low speed for low end torque, open them up on the top end for high end hp. With boost, who cares is my opinion, they're pretty useless.

the issue centri guys are having is, the imrc is mapped to stay partially opened, or even closed when some cars are at like 0 vacuum and boost borderline, so it's causing an interference. Now wide open, the imrc is opened and doesn't present a problem.

Thats kind of what i was thinking. On a Centri you would loose a little low end torque, but who really cares on the street because it will be hard to get that power to the ground on street tires anyhow.

 

[5.0 Steve]

sounds like pure rocket science

 

[Phils15GT]

Mind blown. Good info. Tuner - please delete my IMRC...

 

[tevol1]

Lund tuned my car no issues at all. I would say if your Imrc's arent working thats your problem.

 

[Phils15GT]

Runs good, minus WOT.

 

[5.0 Steve]

sounds like a winner minus tune : (

 

[5.0 Steve]

Lund tuned my car no issues at all. I would say if your Imrc's arent working thats your problem.

Thanks for the educated response db

 

[Barrel]

Runs good, minus WOT.

Sick. Gonna be awesome when you get it all worked out.

 

[Process]

Lund tuned my car no issues at all. I would say if your Imrc's arent working thats your problem.

they are pretty useless with boost.

 

[tevol1]

Thanks for the educated response db

I didnt know you were the OP. Ive been trying to help the OP through Pm's so instead of ruining his thread with stupid comments Like you posted why not go ask more questions on your D1sc or P1sc thread.

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