| "Flow equality for each runner is very important - I'm not sure why you would think otherwise, but I am happy to explain my thoughts: As each cylinder enters its exhaust stroke and pushes the exhaust gases into the manifold, there is a latent amount of "over pressure" still in the cylinder at the end of the exhaust stroke due to a quantity of hot exhaust gases which were unable to evacuate the cylinder. This is due to the fact that there is restriction in the exhaust tract and in the time period of an exhaust stroke event, there is insufficient time for the pressure in the cylinder to completely fall to atmospheric conditions. The greater the restriction in the exhaust system, the more latent pressure and heat exists in the cylinder at the time the exhaust event is completed." Everything you say is correct IF you have all the runners terminating at 1 collector. Then equal flow is good - heck thats why we crave equal length manifolds. However in our situation 1 goes into 2. That is a collector of sorts. Then the combination of 1/2 goes into 3. Isn't it apparent that you would want 2 to be the biggest since it supports 1 AND 2 ? I thought that was clear in my initial post ? As i said before IN A LOG STYLE manifold you want unequal flow rates. We are not talking the ports themselves but the runners too. Harry
Formerly yellowzxtt " If it doesn't make it faster, i don't care "
Please visit www.ztuner.com to GO FASTER |
16:49:46 02/15/07
