1jz-gte + ra28 = skids

[Justengt4]

What's the logic on wanting a dual pass?

[GSRman]

dual pass for water... (originally typed message deleted)

hmm - was probably dual pass for convenience of fittings - no reason you couldn't T-piece them and just parallel... that way when you have your superchilled water setup running you can run into the second half only.

[_glenn_archer_]

What's the logic on wanting a dual pass?

Sometimes it's nice to not cut extra holes in my Swiss cheese car just because, I was going to run the return fitting through the guard but if I don't have to I would rather not cut yet another hole. Might also help keep the speed up on the water flow through the intercooler?

[Justengt4]

Sometimes it's nice to not cut extra holes in my Swiss cheese car just because, I was going to run the return fitting through the guard but if I don't have to I would rather not cut yet another hole. Might also help keep the speed up on the water flow through the intercooler?

Ok cool. If for fitment it would make sense....just checking to save you effort as there's no other gains to be had on the water circuit by going dual pass if you can get even flow thru the core single pass.

[GSRman]

Ok cool. If for fitment it would make sense....just checking to save you effort as there's no other gains to be had on the water circuit by going dual pass if you can get even flow thru the core single pass.

I'm unsure, running the water in a direction opposite to air flow might make the back half of the cooler more efficient.

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[_glenn_archer_]

I'm unsure, running the water in a direction opposite to air flow might make the back half of the cooler more efficient.

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Feeling unsure if it would make the second half more efficient or just make it heat soak faster (hot air hitting hotter side of cooling system and compounding the issue?) I think I would run it so hot air hits coldest part of the intercooler first

I really hope this works...

[nine2nine]

I single passed mine by welding two more fittings on the back, also upgraded to twin 1" lines running a Davies Craig 80l/min pump. Working on the theory quicker is better. Wish I could say how it works, but not going yet so csh.

Hrt5l did have his working twin pass with 1" lines and 80min/min and it worked real well.

[Justengt4]

I'm unsure, running the water in a direction opposite to air flow might make the back half of the cooler more efficient.

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If you have packaging/design constraints like most OEM stuff then dual pass and flow direction become important. As long as you have even flow across the core then all you need is a big enough pump and any other efficiency issue becomes moot really?

[TRD-MX62]

Feeling unsure if it would make the second half more efficient or just make it heat soak faster (hot air hitting hotter side of cooling system and compounding the issue?) I think I would run it so hot air hits coldest part of the intercooler first

I really hope this works...

Consider one way the higher temperature differential makes heat transfer more efficient.

[GSRman]

Think about it this way - would you prefer air leaving the intercooler be in contact with the coldest supply of water - or the hottest part...

(im staring at that gif way too long)

I might be way off - but if you think of 2 copper pipes soldered together - and you are feeding 100deg coolant in one end - and 0 degree coolant in the other end of the other pipe - if all energy transfer that can take place happens - the coolant temps should effectively be opposite at the exit of the pipes.. but if they were entering the same end - they would both come out at 50deg.

[dnegative]

Get Vito to chime in, he's the expert in this shit lol

[trdee]

Single pass on the water circuit *should* provide a higher rate of heat transfer since it's a closed circuit (would help if the air side was dual pass since its open circuit tho). That being said, dual pass on the water may still work ok, and may even work better. Reason being, by removing that baffle you may slow down the water through the core causing a decrease in turbulence and greater "dead" zones on the extremities of the core, this can result in an overall decrease in heat transfer rate, especially if the pump isnt powerful enough.

TLDR: heat transfer is hard and requires too much brain power to calculate this kind of shit, and you wont know how it works till you try it

[_glenn_archer_]

Life is currently getting in the way of me working on my car, only so much can be done on lunch brakes! And I have had a shitload on inbetween ice hockey finals and things that have been booked in for months just stacking up I need some actual DAYS to work on the car. I did however get a bit done late tonight.

Tigged the custom tank I made onto the core.



Made the other tank a bit smaller (was 3.5" outlet and only needed to be 3" turns out I should measure more because I seem to have over looked a few measumenta this time around! Throttle body is like 2.75" OD anyway, ah well). Tapped some M6x1 threads into a bit of 10mm plate to make a mount onto my radiator support brace.
Glued that on, will probably need at least 2 more mounts? One to the strut tower and other to the rad support but until the tanks had been modified/ put on I couldn't even think about brackets yet lol



Tacked the rough bit of 3" piping I had up for the intercooler to to throttle body pipe. Will have a silicone joiner on the upwards bend out of the intercooler and the proflow clamp for the throttle body.
Starting to come together.



Still stuck on what to do for the heat exchanger pump (I have the one that came in the kit but it feels VERY under rated for the size of the cooler) if anyone in canberra has anything laying around and wants to help a brother out even for test fits and ideas? I'm open to ideas.

Also still hurting my brain on the single / double flow / size of lines / bla bla bla

[Justengt4]

The pumps that move the vol you want are pretty big....I have a surflow you can have a play with. Shoebox size pretty much

[GSRman]

Lol no time to work on your car - have kids...


I've used little tiny DC 'booster' pumps for ages - replaced one when it got noisy, otherwise no issue.

How much water do you think the core holds? (Not including tanks) What does the pump flow?

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