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Old 12-19-2020, 05:13 PM   #26
AliBenn
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Join Date: Nov 1999
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Im proud that I asked correct questions!!!
You answered supremely with pix.

Soooooo
When rad mounted in trunk.......
You thinking cut deck lid or cut floor with badass diffuser scooping/directing air to radiator??
Hell....both?
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Old 12-23-2020, 01:23 PM   #27
shadowcompany
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Member#: 189394
Join Date: Sep 2008
Chapter/Region: Tri-State
Location: New York City/NJ
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9994 Impreza LSX STi
AWD

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I want to keep the trunk useable on this car for now. My idea at the moment is to cut out the spare tire well and make the trunk flat. Then mount the radiator directly underneath the trunk compartment. The airflow wouldn't be great but that would allow me to go extreme on the radiator size. Excessive coolant capacity and cooling fans will make up for lack of airflow but it's a weight penalty.

I have mocked it up a few times but no pictures, sorry. The radiator mounts horizontal with the end at the rear bumper tilted upwards, only a few degrees nothing crazy. Puller fans go on the bottom and the coolant hoses go on top, basically reverse locations compared to normal radiator. I would still need to integrate a diffuser that channels air on the bottom and pulls air away from the fans. Rear radiator setup like this works very well but is susceptible to debris damage. To put it in simple terms imagine stuffing a radiator into the space commonly used for a larger rear bumper diffuser and extending it all the way to the rear subframe

Option "B" is to use the current Subaru rally setup which would vent from the rear doors into the trunk compartment and out the trunk lid back. The radiator would be somewhere between the rear shock towers or slightly further back if a larger size is necessary.


The small block V8 has one big disadvantage compared to the Subaru EJ. It requires a lot more cooling capacity/efficiency. The EJ puts out considerably less heat and sheds heat faster.
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Old 03-14-2021, 01:38 PM   #28
2JZ
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Cool thread, look forward to seeing some more updates in the future. Thanks for sharing
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Old 03-23-2021, 03:08 PM   #29
Gixhost
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Awesome job!!! I don't know how I missed this thread.This is an insane build, I love it. All the V8 swaps I've seen are very interesting and impressive in there own right, but this is another level by keeping the AWD system intact.

I wish there was a way to get the motor moved further back but I understand the layout of these cars just won't allow for it. I'd love to be able to stuff a N/A LSx or LT2 (heck, I'm not a fan of Ford but the Coyote engines are impressive as well) in my car, close the hood and no one be the wiser till you start it up...this is the closet I guess I'll ever get to seeing that.

Even when you mentioned the Audi V8s being more compact...it made me reminisce about thinking whether a W8 would fit in one of our vehicles after seeing RWD LS swaps...but it would probably be a nightmare to even attempt it and not worth the effort compared to an LS swap like this.

Prior to this the Hondaru swap was about the most interesting swap for me just because it kept the AWD system. Again, love seeing people with your fabrication skills build what people like me can only imagine.

Last edited by Gixhost; 03-23-2021 at 03:26 PM.
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Old 03-23-2021, 03:47 PM   #30
shadowcompany
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9994 Impreza LSX STi
AWD

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I'm not the first to do this actually...

There is a big turbo LS black 2007-ish STi with the motor way further back into the firewall. Even further than rwd swaps. That car is using an awd automatic. I assume he is using a truck/suv LS related transmission with the axles through the oil pan ala Chevy Trailblazer. The slicks on that car put it in the big tire category. Supposedly this car is in Mexico.

The other car I found is a blue bugeye which did a body lift (Subaru Forester style of spacing the body away from the subaframe) to get the engine to clear. That car uses an elbow that kills airflow on top of an intake similar to mine. He is running a small single though. Motion race works had that car on their Facebook page but all they said was AWD. I don't know what transmission it is using but based on my build it is likely a Subaru transmission.



...I forgot, a small single on an LS is a 7875, a large single is at least an 8088.

Last edited by shadowcompany; 03-23-2021 at 05:07 PM.
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Old 04-01-2021, 01:31 PM   #31
KNACIO
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Wow that thing is INSANE! I'm surprised this is the first time I've seen something like this but its hott
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Old 04-01-2021, 11:22 PM   #32
LogieOneCanobie
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Dyno?
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Old 04-12-2021, 06:40 PM   #33
shadowcompany
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9994 Impreza LSX STi
AWD

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Quote:
Originally Posted by LogieOneCanobie View Post
Dyno?
sure


This is with the 5.3 I built for boost running naturally aspirated. This is only my baseline.


Last edited by shadowcompany; 04-12-2021 at 06:45 PM.
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