redcobalt07

iTrader: (18)

So if I order this from OTTP, I simply just remove my old endplate, put on this new one, run the plumbing and I'm good to go? There isn't anything more complicated than just that?
OTTP Dual Pass Endplate - Over The Top Performance

goeckeritz123

iTrader: (10)

Get the option b. And dont forget to switch your cores

redcobalt07

iTrader: (18)

I already have the option B. But that is all I need right? Just that end plate piece to replace on my current intake manifold?

06arrivalSC

iTrader: (1)

The most important part is changing the direction of the laminova cores, theyre directional and 2 of them need to be swapped so that youre actually utilizing the dual pass endplate correctly...

https://www.cobaltss.net/forums/memb...-cores-550.jpg

like that...

i pulled that from a how-to thread on here btw so you can look that up for further details

nizzle

iTrader: (7)

Agreed! You HAVE TO change the cores to flow correctly. Otherwise it will not work. It not too hard but it's not as simple as just swapping the endplate. In order to change the cores around you have to get the intake off which requires taking the supercharger off as well.

redcobalt07

iTrader: (18)

Yeah my intake manifold is already off. I did find a how to with the core changing. But that is it then right? There aren't any special tools or other parts I'd need? If this is so simple why doesn't GM do this lol.

nizzle

iTrader: (7)

A tiny bit of plumming but yea that's it. Not sure why Chev didnt do this factory

redcobalt07

iTrader: (18)

Haha thank you very much then. I'm definitely going to do this instead of meth.

redcobalt07

iTrader: (18)

Just curious but how does the dual pass endplate setup cool the IAT better?

nizzle

iTrader: (7)

Kinda hard to explain but basically a dual pass allows 2 cores to draw in coolant and allows 2 cores for coolant outlet. Where as a single pass has 1 core for inlet, 1 core for outlet and, the other 2 cores are in between the inlet and outlet.

There are 4 cores in our intake. In a single pass the coolant comes in "core 1", then travels from "core 1" to "core 2", then from "core 2" to "core 3", from "core 3" to "core 4", then out of "core 4" to the heat exchanger to be cooled and sent thru the cores again. As the coolant passes thru each core the coolant becomes hotter and hotter thru each core. In a dual pass, coolant comes in thru "core 1" AND "core 4", then exits thru "core 2" AND "core 3" to the heat exchanger. This way the coolant is in the cores for a shorter amount of time allowing the coolant to remain cooler resulting in lower after supercharger air temps. confused? me too now. LOL

redcobalt07

iTrader: (18)

No actually that explained it perfectly. Thank you very much.

nizzle

iTrader: (7)

Nice. I dont know much, but what I do know I will share LOL

Tennpenn83

nizzle hit it pretty much spot on, except the cores should be in through the middle two, out through the outer two as per GM.

05Slowline

iTrader: (2)

I got a mani with the cores swapped and endplate installed ready to bolt to the motor lol

nizzle

iTrader: (7)

either way will work, you just have to plumb accordingly. to be honest, I cant remember which way I plumbed mine LOL. Gotta go look at it, but either way will work.

05Slowline

iTrader: (2)

either way will work yes, one is more efficient however

nizzle

iTrader: (7)

explain please

05Slowline

iTrader: (2)

2 ports in the endplate are seperated, 2 are integrated

nizzle

iTrader: (7)

Right. I meant the more efficient way vs the less efficient way. explain please. I kinda get it and mine is right but would like details.

05Slowline

iTrader: (2)

Just think about it, cold coolant coming out in separate paths, combining into one, through use of a Y.
Now think about hot coolant doing so, which ones gonna combine easier and cause less turbulence.
Little things that don't make a huge difference at all but every bit counts.

redcobalt07

iTrader: (18)

so what would be the best cooling setup with a dual pass and location of the cores?

Tennpenn83

pump to heat exchanger
heat exchanger to 2nd heat exchanger (lol)
2nd heat exchanger to middle port on endplate
outer 2 ports on endplate to pump.

add a surge tank/bleed line somewhere in the system, doesn't matter where. or do one better and add in a tank with a in/out for 3/4 heater hose, and let the coolant flow right through, increasing coolant capacity. that's the best way

bottom 2 cores should be switched, making it enter through the middle two, exit through the outer 2

nizzle

iTrader: (7)

I would put the pump AFTER the HE's so that way your pump stays cooler.

05Slowline

iTrader: (2)

^ lol facepalm

Tennpenn83

i have had mine set right after the IM pumping into the heat exchangers so that the coolest possible coolant goes into the laminovas.

if you think this has any negative bearing on pump life, i have had mine set up this way for 2 years now...

it's clear you need to take some money out of the common sense drawer