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Original Message
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| "S" stands for Thunderbird, "T" for truck. |
| By Dave Shoe - 01/04/2004 2:14:43 PM; IP 216.243.176.34 |
There was no "S" or "T" marking on the #1 runner in 1958-65, but in 1966 Ford developed two emissions control versions of the intake.
The "T" intake was based on the 1958-65 design, but the runners necked down at the head to match with the smaller "velocity" runners in the head which first appeared in 1966. This intake was most often found on pickup trucks.
The "S" intake was an all new design. It stands about 3/4" taller at the carb flange than the "T", but the runners are thinner than the "T" runners, so I've found no indication it breathes any better than the "T". This intake was found on most every FE car from 1966-1970, and I don't think it was available after 1970. I believe the 1971 390 car engine was a pickup truck 390, so it may have been a "T" intake.
Both the "S" version and the "T" version are available with either a 2V or a 4V carb flange cast in. In 1973, EGR was added, so you'll find the "T" intake with EGR in both 2V and 4V form, too. Also, some cars will have the carb flange tilted slightly different (TBird) to match the air cleaner tilt with the hood slope.
In the mid 1960s, the era when some cars still got expansion tanks (TBird), you'll find some "S" (and maybe "T" intakes) cast for a large hole thermostat, others for a small hole thermostat. Later years standardized on the small hole TStat. Both TStat and TStat housings remain available, so you can convert back and forth, but it's a hassle to dig up the other housing and TStat if you weren't expecting to need to.
Neither "S" or "T" intake is a performance intake. If you want performance cast iron, the 428CJ intake (cast C8OE) is a GREAT cheap intake, though the price has gradually crept up through the decades to $125.00 plus expensive (heavy) shipping.
If you seek a basic performance intake that works well from 300 engine dyno horsepower to beyond 700 naturally aspirated HP, the Edelbrock "Performer RPM" is new, cheap, and quality cast. I don't recommend the lower-cost "Performer" for any application outside of a stock build. Many great aluminum intakes are available for the FE, but they are likely used, so the purchase can get complicated.
JMO,
Shoe. |
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