JLT CAI and blow-off question

geokots · Mar 18, 2015

So I'll be installing the JLT CAI this weekend and have a question about the blow-off. At least initially I will probably just cap the blow-off on the JLT. If I like the sound I might keep it that way.

I have a question about any potential performance hit doing this. I read last fall (forget where) that one of the ways Ford reduced turbo lag was to use recirculate the released air allowing it to build up faster. If I cap the bypass will it create a little more turbo lag?
Is there any performance hit to do this or anything negative?

Juben · Mar 18, 2015

There's no hit to performance or any negative effects from letting the BPV vent. I have this intake and have been running it vented for a while.

SloS14 · Mar 18, 2015

geokots said:
I read last fall (forget where) that one of the ways Ford reduced turbo lag was to use recirculate the released air allowing it to build up faster.

geokots · Mar 18, 2015

SloS14 said:

Did some digging online. Looks like my understanding of how it worked was wrong. Ignore this... looks good to go.

LeonBorden · Mar 18, 2015

It's actually a performance gain. Since our BPV is located on the hot side piping, it's recirculating hot air back into the intake, resulting in higher IATs.

geokots · Mar 20, 2015

One more question. When we cam the blow off on the CAI side, do we just leave the tube loose or remove it?

mbreinin · Mar 20, 2015

In all sincerity, it sounds much cooler recirculated. Plus, you will discover that under cruise the bypass opens up and starts venting... and that is really annoying.

Mike

geokots · Mar 20, 2015

mbreinin said:
In all sincerity, it sounds much cooler recirculated. Plus, you will discover that under cruise the bypass opens up and starts venting... and that is really annoying.

Mike

I'll try it both ways and see. It's pretty easy to do so I don't mind having it off and if I don't like it I can always reconnect. I just want to make sure I do the removal properly.

neodark · Mar 20, 2015

in the CJ pony parts video, he removes the tube completely.

geokots · Mar 20, 2015

neodark said:
in the CJ pony parts video, he removes the tube completely.

Perfect! Thanks

Frogger · Mar 20, 2015

It DOES sounds much cooler recirculating? I capped mine from day one so wouldn't know.

Juben · Mar 20, 2015

Frogger said:
It DOES sounds much cooler recirculating? I capped mine from day one so wouldn't know.

Maybe Mike thinks it's ricey to VTA lol?

EI · Mar 20, 2015

mbreinin said:
In all sincerity, it sounds much cooler recirculated. Plus, you will discover that under cruise the bypass opens up and starts venting... and that is really annoying.

Mike

Typically if a BOV is venting under cruising conditions you would need to make sure the positive pressure lead is connected properly, if so, tighten the spring if it is adjustable. The positive boost pressure is what holds it closed under load, and then the spring is what should keep it shut under normal cruising off boost.

If we are talking about the stock setup, unfortunately I have not seen the motor well yet to know if this is do-able until I get my own car soon.

mbreinin · Mar 20, 2015

Juben said:
Maybe Mike thinks it's ricey to VTA lol?

It depends on what sound you prefer. I have always liked that "flutter" style release, which sounds more like compressor surge. With it vented open, all you get is a PSSST sound, with it recirculating through the JLT, you get a very audible flutter. It really does sound much cooler to my ears. It is all personal opinion.

Mike

Nihil · Mar 20, 2015

mbreinin said:
In all sincerity, it sounds much cooler recirculated. Plus, you will discover that under cruise the bypass opens up and starts venting... and that is really annoying.

Mike

Ive stated this on a few threads and was dismissed lol. If you have the stock bvp going vta when you are cruising you most certainly will hear that thing open and go on and on and on.

JLT CAI and blow-off question

geokots

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Juben

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SloS14

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geokots

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LeonBorden

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geokots

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mbreinin

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geokots

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neodark

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geokots

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EI

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mbreinin

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Nihil

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