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SSRA/FTRA with 3" radiator?

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Old Aug 22, 2023 | 09:14 AM
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Default SSRA/FTRA with 3" radiator?

I was thinking about getting an SSRA/FTRA, or maybe at least doing the free ram air mod. The LS3 is going to have a hard time breathing through those tiny slits at the bottom front of the airbox!

But I have a Dewitts radiator, which AFAICT eats up pretty much all of the space where those things go. I imagine any of the big radiators (ECP, whatever) would create this same conflict.

I guess the free ram air mod would be better than nothing, as it would create some additional slits for air to come in. I could also open up the lower front of the airbox -- basically open up as many paths to the bottom of the filter as possible.

Looking for ideas/suggestions and/or photos of what you've done in this situation.
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Old Aug 22, 2023 | 10:23 AM
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I ran the SSRA with an LT1 radiator (which is bigger than LS1) and the big *** Summit Racing fin+tube trans cooler. But obviously my A/C was deleted. Do you have A/C? Maybe your radiator is too big for this IDK but on the other hand doing the free ram air mod would suck because you'll be sucking hot air which does make a difference.




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Old Aug 22, 2023 | 12:22 PM
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Yeah, I do have AC. How thick is the LT1 rad? The Dewitts is a full 3" deep.
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Old Aug 22, 2023 | 06:26 PM
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Your radiator is about double thickness. You'll need to get a good measurement to see if it would even fit in there. Even if it does, your A/C condenser wont work as good. That's the down side to blocking airflow. That's why I took my ac out, was more interested in performance vs comfort at that time.
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Old Aug 22, 2023 | 08:03 PM
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Ah, good call -- I hadn't considered that the ram air products would block airflow to the condenser. I'm not super worried about that, because I live in Michigan and, while this summer was stupid hot, that's not normal and typically even mediocre AC is plenty -- but still, worth considering. I'll pop off the upper core support again and have a look at what space I'm working with.

I suppose, if there's room to get an SSRA in there at all, I could cut slots in it so that some of the cool, fresh air gets routed through to the condenser (and radiator). Probably still an improvement over the tiny factory slots.

Does SSRA installation involve cutting a hole in the lower airbox, basically the same as the free ram air mod, but then you add the ducting? I'm just assuming it does.
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Old Aug 23, 2023 | 12:45 AM
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Originally Posted by JakeRobb
ADoes SSRA installation involve cutting a hole in the lower airbox, basically the same as the free ram air mod, but then you add the ducting? I'm just assuming it does.
Yes it does.
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Old Aug 23, 2023 | 09:14 PM
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Cutting the hole in the lower airbox assembly is easy.

SSRA is a great CAI mod. It was good for a couple MPH and a couple tenths or so. The IAT is cooler right off the line with the SSRA vs sucking in hot engine air. I used to watch my IAT with and without the SSRA CAI. The car was more consistent with the 60'.

I tested it out a little while back.
https://ls1tech.com/forums/drag-raci...oof-works.html
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Old Aug 23, 2023 | 10:29 PM
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Yeah, I know — just trying to figure out if it’s worthwhile in conjunction with a 3” radiator.

I opened things up tonight to take a look:




There’s pretty much zero room. I assume with SSRA that you are supposed to remove the black plastic shroud that brings air up to the AC condenser, and the SSRA goes there? If true, then I think it might fit, but we’d be compromising flow through the condenser and radiator somewhat heavily.
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Old Aug 24, 2023 | 11:42 AM
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The megamouth will fit with an lt1 radiator. Trim the stupid tabs off of it that rub against it. No way it will fit with a 3" rad without serious mods. The ac version may fit though.
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Old Aug 24, 2023 | 11:44 AM
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Megamouth with lt1 rad. Tabs trimmed.
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Old Aug 24, 2023 | 12:24 PM
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Dude, you have ZERO room unless the A/C goes.
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Old Aug 24, 2023 | 12:30 PM
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Originally Posted by senicalj4579
Dude, you have ZERO room unless the A/C goes.
And the ac went
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Old Aug 24, 2023 | 12:31 PM
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It has about 1 finger of clearence btw hard to tell with pic
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Old Aug 24, 2023 | 03:20 PM
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Originally Posted by Bspeck82
It has about 1 finger of clearence btw hard to tell with pic
That one finger clearance disappears when I put the top support back on; you're just seeing it sag rearward without support.
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Old Aug 24, 2023 | 03:21 PM
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So now I'm kinda thinking about hollowing out some channels in the bumper foam and creating a passage from there to the front of the airbox. I don't have any of the details worked out yet beyond that as a conceptual idea.
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Old Aug 24, 2023 | 10:48 PM
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It's been done before. You could use the ssra ac version. Should fit better. It was meant to fit In front of the ac condenser after all
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Old Aug 25, 2023 | 10:32 AM
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Originally Posted by Bspeck82
It's been done before. You could use the ssra ac version. Should fit better. It was meant to fit In front of the ac condenser after all
What's the difference between the AC and non-AC version?
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Old Aug 25, 2023 | 11:18 AM
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Originally Posted by JakeRobb
What's the difference between the AC and non-AC version?
non-ac is way bigger because it takes up the space that the condenser was occupying. the ac version is designed to occupy the space in front of the condenser much like the factory plastic pieces do.
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Old Aug 25, 2023 | 11:55 AM
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Originally Posted by Bspeck82
And the ac went
Was talking to OP
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Old Aug 25, 2023 | 12:08 PM
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Originally Posted by JakeRobb
What's the difference between the AC and non-AC version?

Lol, the big one (non-ac) = you must lose the ac and with your 3" radiator I'm not even sure it would fit.
I had the big one once and it brought up water temp too much for my liking on the street. Track car yes I wouldn't of cared but I didn't like it for street. So I went back to using the smaller a/c version with the a/c deleted. Very efficient with the condenser gone with the big trans cooler.

Bottom line is you'll either have to give up the a/c or no SSRA with that big *** radiator. Other than that, you'll have to figure something else out. You're just worried about the airbox inlet size correct? Would a taller WS6 lower airbox fit under your hood? That's just a thought.
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