Any Benifit to Locking Cam Phasers with FI

[DougS550]

I was wondering why some people lock out their Cam Phasers. Is their a benefit with locking them out as well as the IMRC when FI on a street car. Thank you for your help.

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[NGOT8R]

Might as well lock the IMRCs out regardless before you tune, because if you don’t, you’ll end up paying for a tune revision later to have them turned off.

Lund charged me $150 to turn them off in all four of my tunes.

 

[KingKona]

Might as well lock the IMRCs out regardless before you tune, because if you don’t, you’ll end up paying for a tune revision later to have them turned off.

Lund charged me $150 to turn them off in all four of my tunes.

This doesn't answer the question;

Why lock them out? What's the benefit?

 

[DougS550]

Might as well lock the IMRCs out regardless before you tune, because if you don’t, you’ll end up paying for a tune revision later to have them turned off.

Lund charged me $150 to turn them o

This doesn't answer the question;

Why lock them out? What's the benefit?

That's my question, cam phasers and Imrc

 

[NGOT8R]

Talk to whomever you plan to have tune your car about whether to lock them out or not. It’s my understanding that many tuners prefer them locked out when going FI.

The benefit to me was as follows:

- No risk of broken or worn out actuators and sensors (I did a thread and/or post showing signs of potential part degradation with less than 6K miles on my car). Note: If this happens, a retune will be necessary which will cost more money.
- Ease of access to upper tranny bolts for removal, rather than trying to reach over the top of the bell housing and risk rounding off bolt heads.
- Decluttering the rear of the IM.
- It was easy to do, especially since I already had the IM off of the car.

https://www.mustang6g.com/forums/th...ing-factory-components-is-it-possible.182920/

See post #12 here:

https://www.mustang6g.com/forums/threads/possibly-broken-imrc-shaft.183221/#post-3690056

 

[HKusp]

I think with the cam phasers locked out, you can run in to low speed drivability issues. I believe it is more suited to "mostly race/occasional driver" type cars.

 

[engineermike]

With ultra high rpm, ultra stiff valve springs, or a big gdi pump it is possible to lose control of the cams because the stock phasers may not have enough torque to overcome the forces applied. Only in those cases would there be a benefit to mechanically locking the phasers. You can electronically lock them but there are only occasionally tuning/testing reasons to do this. Otherwise there’s only disadvantages such as poor idle quality, loss of low rpm torque, loss of high rpm power, and loss of engine efficiency.

 

[DougS550]

With ultra high rpm, ultra stiff valve springs, or a big gdi pump it is possible to lose control of the cams because the stock phasers may not have enough torque to overcome the forces applied. Only in those cases would there be a benefit to mechanically locking the phasers. You can electronically lock them but there are only occasionally tuning/testing reasons to do this. Otherwise there’s only disadvantages such as poor idle quality, loss of low rpm torque, loss of high rpm power, and loss of engine efficiency.

Thank you. I will say it will be a Hard No for me then. Thanks

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