The Fast throttle bodies have very small iac ports which limit airflow before the iac motor is out if range. This usually leads to cold start issues on larger cammed engines even after hot idle counts are minimized.
For cable driven or dbw I have the best results with Nick Williams. (If stock is not sufficient size, and it often is)
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69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700. 95 F355. 96 Carrera 4S. 59 Cadillac series 62 convertible.
The Fast throttle bodies have very small iac ports which limit airflow before the iac motor is out if range. This usually leads to cold start issues on larger cammed engines even after hot idle counts are minimized.
For cable driven or dbw I have the best results with Nick Williams. (If stock is not sufficient size, and it often is)
Not picking on you Sean -- but when air goes from small to large -- it looses velocity.... And velocity is important for torque.... which is why smaller stuff usually builds better torque (although then runs out of air at higher RPM's so the drop off in HP).
I'd try to keep an intake the same diameter as the TB.... if there's no room I've seen a two into one...
Real world --- the small (tiny) air cleaner on the '33 Ford -- kills about 100 HP on the dyno.
Brian Hobaugh SCCA National Tour June 2014
First Hemi 'Cuda Convertible Ever Built
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