EFI, Alpha-N vs Speed Density fueling Strategies

Ed Wright · 03-14-2014, 08:07 AM

I had a sprint car during the 1980s . We all ran down nozzles then. That has been around forever. Was still mechanical back then.
The big deal, we thought, was getting all that methanol out of the intake and port runners, making room for more air. Takes roughly twice the methanol as gasoline, which = less air. The nozzles were aimed to shoot fuel past/under the intake valve when open. Thing about those older mechanical systems, there was no injector pulsing, as with EFI. Constant stream of fuel meant an intake bowl full of fuel when the valve did open.
Brodix, AFR, etc, sold/sell their heads drilled for down nozzles.

03-14-2014, 08:07 AM	#24
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: EFI, Alpha-N vs Speed Density fueling Strategies I had a sprint car during the 1980s . We all ran down nozzles then. That has been around forever. Was still mechanical back then. The big deal, we thought, was getting all that methanol out of the intake and port runners, making room for more air. Takes roughly twice the methanol as gasoline, which = less air. The nozzles were aimed to shoot fuel past/under the intake valve when open. Thing about those older mechanical systems, there was no injector pulsing, as with EFI. Constant stream of fuel meant an intake bowl full of fuel when the valve did open. Brodix, AFR, etc, sold/sell their heads drilled for down nozzles. __________________ Ed Wright 4156 SS/JA Last edited by Ed Wright; 03-14-2014 at 09:10 AM.