Pitot tube tee to intercooler???????

dirk_03 · Jan 20, 2011

So here i am thinking about my pitot tube issues. I have just way to muych pressure reference from it. I posted before and I got alot of good discusion.

So here is what I am thinking. Can anyone tell me why Powderlites and boondockers tee'd the reference line back into the carb side of the intercooler. There has got to be something there why they did this. And someone has got to know. I shot PL a message and have not heard back yet. I am unsure If I will, which I totally understand.

I am not tee'ing back into the intercooler with mine and I wonder if this is where I am having some issues.

Anyone Thoughts? ?

kinger · Jan 20, 2011

Where are you getting the signal from now?

dirk_03 · Jan 20, 2011

Pitot tube

I get it from a pitot tube that is in the charge tube. It is a 1/4 ID tube that faces towards the turbo. It is directly in the middle of the charge tube. I will draw a diagram. . . . .

kinger · Jan 20, 2011

Is your BOV after the Pitot valve? If so then that is probably why because when you chop the throttle it has no where to bleed off pressure? If you tee into the IC and your bov is on the IC like mine is then it bleeds off the pressure?

I stink at boosted carbs and why I went right to FI I'm much better with buttons on a controller then all this stuff.

Rx1M5 · Jan 20, 2011

If it were me I'd ditch the whole pitot thing altogether and just jet the sled and be done with it. Back in the day none of the turbo builders other than Bender did the pitot thing that I'm aware of. I never had one on my setup and a buddy still runs an MCX Vector and it doesn't have one either. Another buddy in our group ran a Bender and he never changed the pitot jet anyways once he got it set. Just hook the carbs directly to the intercooler to lift the slides. JMO.

Rx1M5

dirk_03 · Jan 20, 2011

First of all I do not have a "bender" style pitot. All of the turbo kits(carbed) run a pitot tube. MCX, PL, BD, Bender. It is just a matter of what each one looks like. Bender used a bleeder on theirs I am not trying to do that. I did that last year and was not really happy with it. Mcx uses a pitot tube as well. it is not just a port on the intercooler. There is a tube in there that "meters" the pressure, so you get a dynamic pressure rather than just a total pressure. This is what makes the jetting good for a wide range of altitude and temp changes without re jetting.

Below is a pic of a pitot tube, The style that PL uses and BD, and I think MCX as well. Pretty much a pipe facing towards the incoming airflow. I am pretty sure that mcx has theres figured out from a flow bench, probally others too.

givemeaboost · Jan 20, 2011

Rx1M5 said:
If it were me I'd ditch the whole pitot thing altogether and just jet the sled and be done with it. Back in the day none of the turbo builders other than Bender did the pitot thing that I'm aware of. I never had one on my setup and a buddy still runs an MCX Vector and it doesn't have one either. Another buddy in our group ran a Bender and he never changed the pitot jet anyways once he got it set. Just hook the carbs directly to the intercooler to lift the slides. JMO.

Rx1M5

I think what he's talking about is the pressure signal to the float bowls not the two lines that blow open the slides. When I built my intercooler I was having the same problems beause I just had a nipple welded to the intercooler for the pressure signal. I was told by a turbo builder to run that tube about 5'' up against the airflow in the intercooler. Mine is a crossflow setup and I put a 1/4''id tube facing the air where it comes out of the cooling tubes so it's reading the velocity of the air and not just pressure.

Ken.....

dirk_03 · Jan 20, 2011

Pitot

I am going to put a port on the intercooler to tee my reference from my pitot back to. There has to be a reason that they do it this way. it is the only thing I can see in my system that is different from the major builders.

rx1 fern · Jan 20, 2011

where is the pitot on the powderlites kit because mine dont have one.

dirk_03 · Jan 20, 2011

rx1 fern said:
where is the pitot on the powderlites kit because mine dont have one.

I think everyone is having a hard time getting over the typical thought of the bender pitot. A pitot is a tube that faces instream of a flow. The powderlites kit uses one and so does the boomdocker. So do jets to measure airspeed. The thought of a bender tube with a jet on it is what the yamaha guys think when they hear pitot.

If you pull ur charge tube off and look down the pipe of the intercooler there will be a tube in the middle of it facing back towards the turbo which is the pitot tube.. If it doesn't take a pic to prove me wrong.

rx1 fern · Jan 20, 2011

my charge tube is hollow with only a hole for the blow off valve .this is a front mount powderlites kit on my rx1 .mine doesnt have a pitot like you are talking about.so the powderlites kit dont have it.

dirk_03 · Jan 20, 2011

Here is a pic of a PL rx1 intercooler. It should have a tube that looks like the next pic if you look inside it where the arrow points down the tube. If it doesn't well then call me a monkeys uncle and show me a pic.

rx1 fern · Jan 20, 2011

i see what you mean now .mine has that but i dont have a jet or anything in it.mine is teed into my fpr and carbs .thanks for verifying that.

Ski-Dooin' it · Jan 20, 2011

I have thought about this WAY to much over the last year or two with my carb setup and now the propane, the propane is 100% dependent on the pitot tube pressure for transitional fueling.. so im gettin good at this stuff

give me a call at four o six 871 o955 I think we can get you squared away.

powderlites · Jan 20, 2011

Carb intercooler

Gee weez! Here you go guys.
Bender setup never did work to good in the mountains.
This setup adjusts for alitude pretty good.
Start with 150 mains.

Pitot tube tee to intercooler???????

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