Hey Derty, Intercooler question

[Maliboost]

What do you think?

http://www.yellowbullet.com/forum/viewtopic.php?t=6677&start=15

Bob

[DERTY]

Is that the PT2000 or is that a older core style? The older core styles have much larger passages on the water side that would be more free flowing. I'm guessing that's why you did not see as much pressure drop there. Can you take a peek in through one of the fittings and see if the water side has 1/16" gaps or something closer to 3/16".

I just ordered all of the fittings for me to try this out. It'll be a little bit before I can fire everything up and get some flow rates figured out.

[Maliboost]

Is that the PT2000 or is that a older core style? The older core styles have much larger passages on the water side that would be more free flowing. I'm guessing that's why you did not see as much pressure drop there. Can you take a peek in through one of the fittings and see if the water side has 1/16" gaps or something closer to 3/16".
it was made by Bell, I dunno which type/flavor the core is. I will take a peak tonight when I get home.

I was pretty surprised @ how much water that pump moved. it was kicken it out for sure.

I just ordered all of the fittings for me to try this out. It'll be a little bit before I can fire everything up and get some flow rates figured out.

cool.


Bob

[DERTY]

The Bell cores are not the same as the Honeywell cores used in the new Precision intercoolers. The density of the fins on the Honeywell style core is much tighter which is why I believe there is going to be a serious pressure drop when compared to the Bell cores.

You'll find far less restriction in the Bell cores that you have. A single 55 GPM pump would flow a lot of water through that style of core no problem. :)

[Maliboost]

I had another question. do you put anything into the water? any WaterWetter or Ethelyne Glycol, or maybe some of that oil that machinists use to keep thier tools from rusting?

I noticed that there was quite a bit of scale in the water tank, & I would guess thats just from the water in the ice. I suppose I could make my own ice with distilled water. ROFLOL. Like I got NOTHING better to do than make my own icecubes. LOL
Bob

[Maliboost]

I would guess that it must be more efficient (or they would not bother changing it). I dont see how it would be an advantage?

Its all about sucking heat out of the air. lower pressure with less pressure drop or higher pressure with more pressure drop, the residence time would come out the same, & the temp transfered would be the same. maybe Im oversimplifying it.

Bob

[DERTY]

We usually use straight up water. Most tracks here don't allow additives in your intercooler. Anything glycol based is bad if you were to spill it on the track. I think it's actually as bad as putting radiator coolant on the track with how nasty it is to clean up. We don't make our own ice because we easily go through 5 full bags of ice per pass. It's not uncommon with the other car for us to get 40 bags of ice for a race night. You should see the look on the clerks face at a gas station when you empty out their ice chests. :)

The core may scale up a bit from some of the mineral garbage found in the water. But aluminum itself won't rust more than it will just build up that film.

As far as the new style coolers go, they are all based on the premise of having an appropriate amount of cooling surfaces to exchange with the air. I don't know all the math behind it. But we talked about it before as being related to the amount of surface area. The new cores are much smaller and are rated for higher HP applications. That can only be possible if you are able to increase the density and decreasing the size to maintain the same amount of heat transfer.

In the case of the Honeywell cores it looks like they've done that by making the water sides much smaller and tightly packed with fins. The air side is close to the original core design and size which explains why it was shrunk in thickness but not height and width. Otherwise the pressure drop on the air side would not be too great. But they can get enough heat transfer through less water area where they could reduce the size of the water side.

Anyway, the theory behind it all gets a little deep from what I've been able to study up on. That's about as layman as it gets. :shock:

[Maliboost]

I understand the logic behind the coolant thing, but............... if its a self contained system IN the passenger compartment of the car, the odds of it leaking as as much as motor oil or trans fluid. the only time its gonna puke is if its smashed into a wall & a line ruptures. Anyway............. no worries.

Yea, I can see the argument, more surface area, more contact with the air, more heat transfer. it make sense.

thanks amigo

Bob

[DERTY]

Actually, you drain the excess water after every pass unless you run it closed loop with just water. Every pass you need to put ice in the tank, which means you have to drain it somehow. That water that comes out ends up somewhere in the pits wherever you toss it. Some places like Norwalk water runs out of your pit space and into the asphalt lanes. Then you drive across it, etc. You're supposed to keep the water from doing that and dump it where it doesn't get on the cars. But still, you would have to continually keep adding glycol all the time. In our case we'll drain out nearly 3 to 5 gallons of water each time before we repack it with ice.

[Maliboost]

Right on, I get it.

Bob

[Maliboost]

I checked it out tonight & here is what I got.

Bob
http://upload2.postimage.org/126306/DertyICpictureEdit.jpg (http://upload2.postimage.org/126306/photo_hosting.html)

[Maliboost]

Do you drain it almost down to empty & then fill it with ice & let it melt?

Bob

[DERTY]

Intercooler holds a lot of water, so do the lines. We drain the tank down quite a bit, so that there is only enough water left to flow when the pump is on. The rest of it is as much ice as you can possibly stuff in the cell. We pack it so damn tight it hurts to fill it any further by hand. Get a tank with the large mouth on it too. Reichard Racing makes a great one. Lets you get your hands down in there. Then turn the pump on every now and then while filling. Like ice in a glass, the water tends to realign the ice cubes so you can fit more in there.

Depending on how much power you make you can sort of cheat on this a bit. Guys that run mid 9's on air/water don't need to do this as much as the guys that run low 7's. You're essentially maximizing the amount of cooling possible. When the car comes back from a run you'll see maybe one or two ice cubes. That's pretty much ideal.

Some have been know to stuff a barley pop in the tank on their last run for the ride back. :)

I'll try to run a bench test this weekend with the 55 GPM pumps.

[Maliboost]

Right on. the tank that I have has a 6" lid on it. Ims ure that filling it wont be that big a deal. Im running an 88mm on gas, so Im not looking to set the world on its ear, just hold my own around here in this little pond.

thanks
Bob

[Monty Mikho]

Guys very cool post/thread..... Is it cool for me to move it to the turbo section?

[DERTY]

Not a problem. I'll post results once I get this expensive pile o stuff on the bench and flow it.

[Chuck L.]

This is the 2nd best post of all week!

and now you want to move it! :evil:

[Maliboost]

OK wit me.

Bob

[Maliboost]

This is the 2nd best post of all week!

and now you want to move it! :evil:

Its OK Chuck dont take it personally. He's just sore he got his ass waxed today buy a Furd guy, now he's flexing his internet muscle. Oh wait, he flexed that earlier on the "Your Gay Network" post. ROFLOL.

Bob

[Maliboost]

what, now Im hi Jacking my own post??????? lol

BOB

[Mark Kasperan]

Being new to the turbo thing lots of good info , thanks Mark

[Juiced10.5]

Have a chance to flow test the intercooler yet?

[DERTY]

I'm waiting on a few more fittings that were backordered. Which reminds me that I need to call and check up on them. :)

[Juiced10.5]

Bump. Any update?