Intercooler flow questions -- Turbo Mopar Main Forum

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Subject: Intercooler flow questions

Author:
tonyz2897

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Date Posted: 22:47:59 01/30/03 Thu

I finally got the Talon cooler out and the stocker in. Now I'm noticing that the boost is falling off in the upper rpms. The old setup was a Talon cooler with 2" pipes. The new setup is a stocker with 2.25" pipes. I saw the flow comparison on Gus' site and the Talon cooler definately out flowed the stock Dodge unit, but I'm pretty sure the one that was tested had a larger inlet/outlet welded on.
Is it possible that the stock cooler is adding enough restriction even with the larger pipes to be responsible for the boost dropoff I'm noticing? If so, I think I'm going to do a double cored Talon frontmount with 2.5" pipes. Maybe that'll help the flow situation some...
Thanks,
Tony

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Replies:

[> Subject: Re: Intercooler flow questions

Author:
mpbiv
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Date Posted: 06:02:41 01/31/03 Fri

Assuming stock inlet and outlet are adequate enough to feed the core, then any increase in inlet/outlet size would probably have negligable effect on overall flow considering the core would still flow the same. IMHO the most restrictive part defines the overall flow characteristics of the intercooler, just like the weakest link describes the strength of a chain.

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[> Subject: Re: Intercooler flow questions

Author:
tonyz2897
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Date Posted: 03:01:07 02/01/03 Sat

I see your point. Sort of like how it doesn't do much good to install a header on our cars because the stock exhaust manifold already flows better than what the turbo is capable of. I'm still kind of confused as to why I'm seeing this big of a drop though. It's almost as though the turbo can't keep up with the engine's demand for air at higher rpms now. This has been quite a bit of time and money invested to create exactly the opposite of the desired effect. :-(
Tony

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