Return Flow Intercooler Vs Regular Front Mount Intercooler Question

[scotty nm35]

Yes but some how your SS2 is god like haha

I still don't understand how you managed to make 324kw on 16psi, it's just insane.

Depends which turbine wheel it has, Tao is using near GT35 sized wheels in the SS2 these days so I would expect it to flow well.

[Manuel Kasko]

It seems to have some really good response as well.
I'll buy the turbo last and if I can afford the extra bit of cash for an SS2 over a highflow then I will do that.

[Dose Pipe Sutututu]

I wanna upgrade now

(has a sads)

[kingtube69]

I went ATR45SAT from Stao - Supposed to perform well on restrictive systems. I ended up buying a different actuator though so I can get it down to lower boost pressures. The actuator that comes on it is a 20PSI one and I doubt the stock motor would be very happy with that.

[r34unit]

I made 330 kW 19psi on e85

With my blitz return flow cooler.

[Manuel Kasko]

I made 330 kW 19psi on e85

With my blitz return flow cooler.

Good to hear because I just had one arrive today. What turbo?

[r34unit]

Gt3037

[Checkbuzz]

For the record I have the Blitz return flow... 320rwkw+ @ 18psi

Gets tracked a lot, never had an issue

[Dr. Surge]

Is there anybody who has tested/used the pwr r34 intercooler. I'ts also a return flow setup but i gues, that a brand like thid will not make something that will give flow restrictions, at least not at that price ...

This is the one I mean: https://www.pwr.com.au/wp-content/uploads/PWI2204-Skyline-R34-GTS.jpg

[Dose Pipe Sutututu]

I went ATR45SAT from Stao - Supposed to perform well on restrictive systems. I ended up buying a different actuator though so I can get it down to lower boost pressures. The actuator that comes on it is a 20PSI one and I doubt the stock motor would be very happy with that.

stock motor loves boost (when fitted with proper head studs)

spent all Sunday abusing my car at Wakefield in 40 degree heat and then drove home. Motor still pumping on!

[GTSBoy]

Is there anybody who has tested/used the pwr r34 intercooler. I'ts also a return flow setup but i gues, that a brand like thid will not make something that will give flow restrictions, at least not at that price ...

This is the one I mean: https://www.pwr.com.au/wp-content/uploads/PWI2204-Skyline-R34-GTS.jpg

As I have said before, it does not matter how good the core is when the end tanks (well, mainly the return flow end) suck testes.

[Dr. Surge]

Nah, don't think that's the problem because a turn wil not let drop you pressure, the core himself gives a lot more resistance then a turn in a decent diameter could do. You see lots of people who fabricate there own return flow'ish piping with a 180 degree radius directly after the cooler, so that should give you the same issue then a turn Built in the end tank ... Not talking about the phenomen that the isue is mush bigger on a neo engine

[Trex]

Nah, don't think that's the problem because a turn wil not let drop you pressure, the core himself gives a lot more resistance then a turn in a decent diameter could do. You see lots of people who fabricate there own return flow'ish piping with a 180 degree radius directly after the cooler, so that should give you the same issue then a turn Built in the end tank ... Not talking about the phenomen that the isue is mush bigger on a neo engine

Hks made one with the 180 bend. I was going to make one and did a bit of work and was very easy to do. The only problem was it was either too low or it sat against the radiator.

I honestly can't see or have found a good explanation on why a return flow is a restriction.

[Dr. Surge]

From wath i read, and with the things i know, the only problem i can see/blame, is the core himself, the shape inside, or how it's made, dunno

[GTSBoy]

so that should give you the same issue then a turn Built in the end tank ...

That's simply not true. You're talking to a professional aerodynamicist here.

[Ryno]

I'd believe GTSBoy... But if you need more info. This page has more info than you could ever want on intercoolers.

http://www.are.com.au/techtalk/intecoolersMR.htm

My new intercooler is an ARE, given the information they've put together on that page, they clearly know what they're talking about.

[Dr. Surge]

Ok rhen you'll be kowinng what you're saying :-p

But i personaly don't see the the difference, can you explain why you're not having the same isue if you're fabricating a 180 degree turn directly after the end tank. Because of you look at the blitz, it's just like they have 'welded/extruded' the turn just after they bring the air together in the end tanks.

[XKLABA]

It's not so much the 180deg bend as it is that it turns on such a tight radius, if the 180deg bend was around a 300mm radius the issue wouldn't be so bad but most return flow intercoolers have the 180deg bend inside a 100mm radius which with air volume and velocity trying to get the air to change direction causes turbulance which creates a high pressure area inside the bend that restricts flow

A crap cooler core runner entry design will also add to the issue

Now I'm only a machine opertator so that might be wrong but that's my understanding of it

[GTSBoy]

^ This is pretty much it. It's not just the tight radius. At least with a bend to make the equivalent of a return flow cooler, it is made out of pipe, so has a smooth pipe to flow around the 180. The exit from a typical return flow tank is just shocking, basically just a 90° sharp corner off the end of the tank, and that's after the air has already had to turn 90° off the end of the tubes.

On top of that, the core is only ~75% the height of a full cooler because the return pipe either goes above or below the core. So you will run a higher pressure drop across the core itself at any given power level.

Don't get me wrong, I don't have a vendetta out against return flow coolers. I have one on my car and have done so since last century. Just pointing out that there are real reasons why they will hit the wall before a normal cooler will.

[Dr. Surge]

One thing is sure, lot's of people refer to the shorter piping, but imho, if you make you're piping decent, like for instance a plazmaman piping kit, i don't think piping will be that much longer