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[Datsun 1200 encyclopedia]

Intercooler

From Datsun 1200 Club

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Category: Forced Induction

<-- Back to Turbo systems

By keeping the air cool and therefore dense, an intercooler will allow the boosted engine to make far more horsepower. Because the air is not overheated, more spark advance can be applied for more HP. Because the air is dense, more packs into the cylinders (air mass) which means more HP. And more boost can be applied before the knock index of the fuel is reached. More boost = more power.
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Contents

Overview

An Intercooler is not needed, for example the first three years of the Porsche 911 Turbo didn't have one (1975-1977) and still this 3.0 liter turbo outperformed 7.5 liter NA cars.

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An intercooler can result in far more HP, but requires a blow-through system (boxed carburetor) or EFI port injection. This is because for safety you don't want air-fuel mixture going through the cooler, where it will condense out of the airstream and result in fuel puddles in the cooler!

Even so, intercooler is worth the extra cost and complexity, because it significantly reduces the temperature of the compressed air, which increases the boost possible with a given octane fuel. So basically, for a modest up-front cost, you gain additional horsepower forever after.

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An alternative to the intercooler is to use water or alcohol injection. Some OEM applications used water injection (ex. 1962 Oldsmobile Jetfire which was a 10:1 V8 turbo).

NOTE: intercooler should not be used with a draw-through carburetor system. Instead, use #Water Injection

Can you re-purpose a car radiator and use it as an intercooler? Using an aluminum radiator should be better than nothing. Unless someone actually tested this, we are all just guessing as to whether it will work or not. Radiators can flow a lot of water, and air is easier to pump ... so air should flow through w/o significant restriction. Putting this in front of the car should allow some cooling effect, although obviously not as a much as a purpose-designed cooler.

Nissan GTiR factory-style intercooler (top mount) | Traditional in-front-of-radiator intercooler
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Sleeper 120Y has intercooled FJ engine
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FWD A14
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Alloy radiator + intercooler
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Tubing
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Front Mount

FMIC (front-mount intercooler)

Traditional in-front-of-radiator intercooler
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Front External

For that bulldog look.

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Small Front Mount

Smaller intercoolers fit between the grille and the radiator for a sleeper look. 26" x 9" x 2.5" which is almost the max size you can go without cutting a lot.

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small front-mount
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triple intercoolers
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MIN712
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perth-style
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Large Front Mount

For large intercoolers a section of the radiator core support is cut out
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A lot can be cut out to fit gargantuan intercooler
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620 x 320 x 76
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400 x 300 x 73
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Supra intercooler
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120Y grille modded to accept intercooler
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Top-flow
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Airbox Tubing

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Turbo Tubing

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Top Mount

Nissan GTiR factory-style intercooler
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S13 Silvia
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Pulsar?
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Top-mount Subaru Forester intercooler
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Brackets

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Set-back Intercooler

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Dry-Ice Intercooling

ARE
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This page has been accessed 3,916 times. This page was last modified 07:59, 31 May 2019. Content is available under Datsun 1200 Club.