You are right on Dave. If this is a problem we will soon know. Evap cooling may be more intense in the p port runners because of the velocities involved. I intend to provide optional heated air from the cool tube exhaust to the throttle body regardless. Jerry



On Monday, June 20, 2005, at 03:06 PM, david mccandless wrote:

On PL's recent PP dyno run, he stated that with the injectors placed near the entry of the runners, there was considerable evaporative cooling taking place and as the tubes were running very cold VE should be good. The worry to me here is that with the TB at the other end of the runner,ie close to the port, there is a real risk of ice build up on the throttle body butterfly. The old bugbear of carb ice is back. FWIW, Dave McC

since the

----- Original Message ----- From: Jerry Hey
 
based on Paul Lamar's current p port testing there is no problem with placing the injectors at the far end of the runners. This is also backed up by an article on the internet (How to Fabricate an Intake Manifold) The idle issue is not with injector location but rather with butterfly location.