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GEN 1 (2010-2014) Ford SVT Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Procharger Stage II vs HO Intercooler
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<blockquote data-quote="BoostedToy" data-source="post: 1737242" data-attributes="member: 31712"><p>In theory, the centrifugal should be easier on the engine than a PD supercharger. PD superchargers by nature create higher cylinder pressures at lower engine speeds, which is where the loading is harsher on your bottom-end. There are ways that centrifugals can improve lower engine speed performance (orifice plates and pulleying to increase the boost at lower and mid rpm and sizing the plate to restrict to a specific intake airflow. Ex) pulleying for 15 psi but restricting airflow to produce a max of 8 psi, which may be reached and carried from 4000rpm on, versus with a normal 8psi pulley combination and reaching 8psi at 6500 rpm, but only making 3 psi at 4000 rpm). </p><p></p><p>The issue seems to be tuning related on the centrifugals, with the limiting factors being the PCM Ford has on these trucks. Having tuned turbos, centrifugals and PD setups in the past, PD’s are really easy to tune.</p></blockquote><p></p>
[QUOTE="BoostedToy, post: 1737242, member: 31712"] In theory, the centrifugal should be easier on the engine than a PD supercharger. PD superchargers by nature create higher cylinder pressures at lower engine speeds, which is where the loading is harsher on your bottom-end. There are ways that centrifugals can improve lower engine speed performance (orifice plates and pulleying to increase the boost at lower and mid rpm and sizing the plate to restrict to a specific intake airflow. Ex) pulleying for 15 psi but restricting airflow to produce a max of 8 psi, which may be reached and carried from 4000rpm on, versus with a normal 8psi pulley combination and reaching 8psi at 6500 rpm, but only making 3 psi at 4000 rpm). The issue seems to be tuning related on the centrifugals, with the limiting factors being the PCM Ford has on these trucks. Having tuned turbos, centrifugals and PD setups in the past, PD’s are really easy to tune. [/QUOTE]
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GEN 1 (2010-2014) Ford SVT Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Procharger Stage II vs HO Intercooler
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