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[ROOT]/includes/bbcode.php on line 112: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4752: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887) [phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4754: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887) [phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4755: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887) [phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4756: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887) RS Motorsport :: Classic Speed Restored • View topic - Pinto CNC head ?
We were experimenting in detail with port shape and sizing for the Ford SOHC engine in the early 1980's for use in high powered street cars using pump fuels.
Many tips and clues demonstrated in Vizard's book were used, however we found the real secret was in the turbocharging in preference to normal aspiration.
To create high horspowered NA engines meant that the drivability and reliability of the car was compromised which is often a pain. To produce horsepower the engines needed revs, which was expensive and often unreliable. The concept of raising the inlet ports, although possible was deemed to be lot's of work, with lot's of dollars for only a small real gain (possibly not even measureable), as one owner on this thread has discovered.
The result with the turbo was a perfectly tractable, economical and reliable engine which anyone could drive with ease, yet at approximately 1.5 bar produced well over 350bhp and most importantly oodles of torque from 2,500 rpm. During normal street use the engine was more flexable at low revs (from 1000 rpm and up) than the factory standard 2 litre engine. There was little need to rev over 6,500 rpm for street use. We used rev limiter, blow off valve and also an adjustable wastegate. In later development times we were experimenting with 2.0 bar and intercooler.
The only real limitation was the chassis and rear suspension which was fitted with 5 link.
The Ford SOHC engine is a gem to modify and turbocharge.
Unless racers are confined to class rules and regulations, I would question the need for the high level of redesigning and redevelopment of these heads.