n2omike wrote:On these heads, the intake port is shortened, so port volume cannot be directly compared to standard heads. The cross section of these 190cc heads compares more directly to a standard valve placement head in the 205cc range.
Since the valve is pulled back for unshrouding, they aren't as hindered by 4.0" bores as much as standard valve placement heads.
With some fairly minor hand work, these heads can flow really well, and do so at moderate valve lifts.
Shortly after the 170cc head came out, TEA had them flowing 300cfm at around 0.500" lift.
They were the most popular head in one of the lift limited mustang classes... Renegade, I think.
These 190cc heads are the big brother to the original 170.
I have a set of the old 170's that I hand ported. (no flow bench or anything)
They are in my pump gas 306ci 1966 mustang street car with a SFT cam, 6800 rpm shift, stock toploader 4-speed, 4.33 Detroit Locker, 3300lb w/driver, 1-5/8" headers, and a 200hp nitrous plate. Car went 10.15 @ 133.7 mph last fall.
new engine builder wrote:n2omike wrote:Shortly after the 170cc head came out, TEA had them flowing 300cfm at around 0.500" lift.
What is the part # of the heads that have a port volume of 190 cc's and flowed around 300 cfm at .500 lift.?
Keith Morganstein wrote:I like the look of the CNC'd chambers (shape) Wonder how they would respond to steeper valve seat angles?
What kind of valvetrain / rockers are required?
Is Trickflow owned or marketed by Summit? The website has a Summit look to it.