Main British Car:
Posted by: pcmenten
Date: March 07, 2016 06:22PM
Dan Jones' report of porting TA cylinder heads
Stock 4.6 heads with 1.575" intake valves,
vs. ported 300 heads with 1.775" intake valves
vs. out-of-the-box TA heads with 1.94" intake valves
vs ported TA heads with 1.94" intake valves
vs ported TA heads with back-cut 1.94" intake valves
'back-cut' means the valves were given a 30 degree back-cut.
If these results are real, I'm very curious to understand why the ported 300 heads did so well. I've heard Vizard suggest that shallow, open heads benefit from a 30 degree valve job - better low-lift flow. I'm wondering what magic Dan performed on these 300 heads.
bold and red
For those who are looking at this, note that some of the BBcode markup is using the square brackets and other uses angle brackets. Above, I figured out that I needed to use the square brackets to make the 'color' directive work. Oddly, the 'tt' tag works to make a teletype font, but explicitly naming a font did not work with either style of brackets.
Edited 5 time(s). Last edit at 03/07/2016 11:51PM by pcmenten.