Port nozzles.....

Hey guys...need some opinions. I run outlaw 10.5 w/ a 427 small block ford, stripped 871, 8% over, 22lbs boost, injected alky. I was running only hat nozzles with .055 last year. It was pretty fat. Bumped the compression to 10.8:1 (from 9.89:1), ported the heads (349cfm per chamber now), and plan on going to 20% overdrive. Was planning on puttin in port nozzles this year. I'm getting a few people saying don't waste your time with the port nozzles in my application. I have egt's on every header and can adjust the timing in each cylinder this year. Basically i plan to turn the wick up and run the thing on edge to be competitive this year. Am i wasting my time? Or is port nozzles a must to run on edge? I have a promod guy that is helping us tune on it this year and is wanting me to go with the port nozzles to be safe. I had some comments (don't want to mention the company) that were made that the jets i'd have to run would have to be too small and are more susceptible to getting plugged therefore burning up a cylinder. Is it worth the risk or do I just pour a bunch of alcohol through the hat with my setup? Thanks for any info...

Josh

 

Port nozzles

Doesn't look like anyone wants to touch this one for ya.
I went to ports a while back and heard the same chatter from people. I think port nozzles work excellent, and would recommend them to anyone that wants to get better tunability out of their system.
My fuel system guy gave me a few pointers and away I went. Definitely get in touch with a fuel systems person to flow and set up your fuel system.

 

Hey JM thanks for the reply! Yeah I think there's just too many answers out there and people are afraid to voice their opinion and get slammed by someone else. But I agree with ya...guess i'll just throw some big jets in and work my way down from there.

 

Perhaps...

A few thoughts: If the current tune is good, total fuel demand is going to be the same...or a tad more. Fuel in the hat cools the blower. Ratio rumors I've heard suggest 70% in the hat, 30% to the ports. SO...Area of hat nozels X .7 = NEW hat nozel area, the other .3 should be the total port nozel area. Sounds like just as good a SWAG as any other I've heard.

 

Nozzles

The team I help ran both port and hat nozzles plus 1 or 2 directly into blower. Now runing 632 not blown. It was recomended to us to remove nozzles from hat and move them to the ports.
Also we recently added a fuel filter. I know alcohol engines require large amounts of fuel.You mentioned about clogged nozzles.If using a filter you must use a good quality screen filter and check it after each run. Also check nozzles after each run,alot of guys do not do this. The con of using a filter is it could hamper fuel flow if debris got in it. Well if the filter did not catch it the nozzle would have ? The filter could give a lean condition if not checked after each pass along with the nozzles. Also are fuel tanks and lines should be cleaned regularly. Use a good quality funnel with filter. We use a funnel with a filter in it and also we run fuel through an auto body paint filter prior to going into filtered funnel. I had checked back in some mags and had seen several blown cars using a fuel filter.One in particular was a blown small block door car with a filter between pump and barrel valve. Running 3.9's at 180 Mph in 1/8 mile. Good Luck
PREVENTIVE MAINTENACE IS THE KEY TO THESE ENGINEs SURVIVING.