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Originally Posted by JasonC SBB
(Post 430056)
Nice!
If I were to nitpick, they shoulda done something similar for the charge air entries. |
its under pressure. it'll make its way to the exit.
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Originally Posted by Braineack
(Post 430250)
its under pressure. it'll make its way to the exit.
air that has to ram into a wall, turn around, and make another U-turn to find the right hole is slow air. you want the inside of that core to be as funnel-y as possible. |
Originally Posted by y8s
(Post 430057)
... I would like to see someone just flood the space on the intake charge end of the core with some kind of epoxy or molten aluminum to smooth it out.
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Ha, this is going to be my first post as a newb, but...
With those delta fins, wouldn't it be closer to ideal to have them be half rounds? As it is if you look at it you are getting 3/4ths the flow funneled through half of them, while 1/4 of the flow is going through the other half. (I am talking about external flow through the IC here). I know in actuality, you are still going to get reversion, so it isn't going to go precisely like that, but if you want to decrease your CD, that reversion is killing you. Half rounds really would be better at the leading edge, with the trailing edge getting more of a taper (although from a manufacturing perspective, I wouldn't expect better than half rounds at the tail end either.) At the very least they could have done the delta fins in such a way that the ones that essentially funneled 3/4 of the air in, would have had the same funnel going out, but instead the ones that got 1/4 of the air in get the funnel out. That being said, the deltas are reasonably rounded, so again, maybe not that huge of a difference. Internally, I like the epoxy flooding idea, but that takes you to the flat plate that you had outside, if you want to get similarly crazy with internal flow, you would want it raised in between to deflect the flow through the IC channels. (Styrofoam rounds covered in epoxy maybe? Obviously you would want something temperature stable and light, maybe really thin aluminum sheet rounds if you felt like cutting the endcaps off and rewelding.) |
Originally Posted by elsdragon314
(Post 430633)
Ha, this is going to be my first post as a newb, but...
With those delta fins, wouldn't it be closer to ideal to have them be half rounds? As it is if you look at it you are getting 3/4ths the flow funneled through half of them, while 1/4 of the flow is going through the other half. (I am talking about external flow through the IC here). I know in actuality, you are still going to get reversion, so it isn't going to go precisely like that, but if you want to decrease your CD, that reversion is killing you. Half rounds really would be better at the leading edge, with the trailing edge getting more of a taper (although from a manufacturing perspective, I wouldn't expect better than half rounds at the tail end either.) At the very least they could have done the delta fins in such a way that the ones that essentially funneled 3/4 of the air in, would have had the same funnel going out, but instead the ones that got 1/4 of the air in get the funnel out. That being said, the deltas are reasonably rounded, so again, maybe not that huge of a difference. Internally, I like the epoxy flooding idea, but that takes you to the flat plate that you had outside, if you want to get similarly crazy with internal flow, you would want it raised in between to deflect the flow through the IC channels. (Styrofoam rounds covered in epoxy maybe? Obviously you would want something temperature stable and light, maybe really thin aluminum sheet rounds if you felt like cutting the endcaps off and rewelding.) yes you would want funnel shapes in the end plates rather than flat. that's hard though. interesting picture: http://www.are.com.au/feat/techtalk/tti001n.JPG interesting article from which it came: ARE Cooling (Aluminium Radiators & Engineering P/L) |
Originally Posted by elsdragon314
(Post 430633)
Ha, this is going to be my first post as a newb, but...
With those delta fins, wouldn't it be closer to ideal to have them be half rounds? As it is if you look at it you are getting 3/4ths the flow funneled through half of them, while 1/4 of the flow is going through the other half. (I am talking about external flow through the IC here). I know in actuality, you are still going to get reversion, so it isn't going to go precisely like that, but if you want to decrease your CD, that reversion is killing you. Half rounds really would be better at the leading edge, with the trailing edge getting more of a taper (although from a manufacturing perspective, I wouldn't expect better than half rounds at the tail end either.) At the very least they could have done the delta fins in such a way that the ones that essentially funneled 3/4 of the air in, would have had the same funnel going out, but instead the ones that got 1/4 of the air in get the funnel out. That being said, the deltas are reasonably rounded, so again, maybe not that huge of a difference. Internally, I like the epoxy flooding idea, but that takes you to the flat plate that you had outside, if you want to get similarly crazy with internal flow, you would want it raised in between to deflect the flow through the IC channels. (Styrofoam rounds covered in epoxy maybe? Obviously you would want something temperature stable and light, maybe really thin aluminum sheet rounds if you felt like cutting the endcaps off and rewelding.) |
Maybe this is why ARC shit is so fucking expensive...seems to be just what the doctor ordered....
"Delta-fin" construction - http://www.gpiperformance.com/images...tercoolers.jpg http://www.evasivemotorsports.com/EV...NTERCOOLER.jpg Seems to have standard looking internal construction on the outlet side...but the inlet side..... http://www.turbocelica.lv/files/imag...r-endtanks.jpg |
I bought it thinking it was a standard tube and fin. I paid $58 shipped and sold the current one for $45...I'm not complaining. I'm curious to test out the airflow through with the fans running like Jason did.
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Sounds like a good deal Brain!
Another ARC shot... http://i.ebayimg.com/01/!BV8c6b!!2k~...EQWZ1g~~_1.JPG Note the left side of the core is the inlet, you can see where the "air guides" are. |
Looks like 2/3rd cobra saw the same flow improvement results going from his BEGi B&P IC to a PWR T&F:
BEGI: http://memimage.cardomain.com/ride_i...0189_large.jpg PWR: http://memimage.cardomain.com/ride_i...0188_large.jpg http://memimage.cardomain.com/ride_i...0187_large.jpg |
Originally Posted by BradC
(Post 430666)
Maybe this is why ARC shit is so fucking expensive...seems to be just what the doctor ordered....
"Delta-fin" construction - http://www.gpiperformance.com/images...tercoolers.jpg http://www.turbocelica.lv/files/imag...r-endtanks.jpg Yum!! Lots of details can make intercoolers (and radiators) perform better than average. |
Brain,
I don't think 2/3rds Cobra went from a BEGI to an AVO. I think it was from BEGI to a custom TDR one. |
my bad, it was a PWR actually ;).
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happy times:
http://www.boostedmiata.com/new_miat...%20(Large).JPG http://www.boostedmiata.com/new_miat...%20(Large).JPG I haven't logged yet, but the butt dyno says the turbo is coming on faster. Must have shaved 8-10lbs off the front going to this one. I noticed my CLT temps on the highway stay around 194*F without the fan on a 82*F day. Before it would have been running 196-200*F with the fan running. I didn't boost much to notice the aits, ill log a few fourth gear pulls later this week. |
faster spool, better response = I'm happy.
next stop, smaller trim compressor wheel, dun dun dun. |
I have the TDR kit in mine. It does a great job with intercooling. When the pipe from the turbo is quite hot, the pipe to the intake manifold is similar to ambient air temp.
I think part of the explanation is the ducting that causes all air to pass through the IC rather than around it. Barry |
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