I feel I am chasing my tail.
I start up the chevelle and it shows 7 pounds fuel pressure on the regulator, go up the road and get it hot with a high speed pass, and pull back in the shop and it shows 3 pounds and will slowly drop to zero and pull all of the fuel out of the front bowl, so you think vapor lock right? Well that is what it acts like for sure, but its never did it before on hotter days than it is now and I did not change anything. All of a sudden after 3 years it acts up.
540 cubic inch.
clay smith mechanical big block fuel pump. 1000 cfm AED 4150 carb.
1/2 inch steel braided fuel line from the tank to the pump and then 1/2 inch line to the fuel regulator and then 1/4 inch lines to each bowl, they are all wrapped with reflective heat resistant tape, I used the original 3/8 fuel line for the return to the tank. I checked the inline fuel filter and it is good. I have have raced this car in vegas at 100 degrees without a any issue, hot lapping it.
Before I start throwing parts at it I would appreciate some insight from anybody who has seen something similar.
Maybe the fuel pump is giving up but I don't think so because the car will light right up 2 hours later when the fuel bowl fills with 7 pounds on the regulator. Thanks ahead of time for your insight.
I start up the chevelle and it shows 7 pounds fuel pressure on the regulator, go up the road and get it hot with a high speed pass, and pull back in the shop and it shows 3 pounds and will slowly drop to zero and pull all of the fuel out of the front bowl, so you think vapor lock right? Well that is what it acts like for sure, but its never did it before on hotter days than it is now and I did not change anything. All of a sudden after 3 years it acts up.
540 cubic inch.
clay smith mechanical big block fuel pump. 1000 cfm AED 4150 carb.
1/2 inch steel braided fuel line from the tank to the pump and then 1/2 inch line to the fuel regulator and then 1/4 inch lines to each bowl, they are all wrapped with reflective heat resistant tape, I used the original 3/8 fuel line for the return to the tank. I checked the inline fuel filter and it is good. I have have raced this car in vegas at 100 degrees without a any issue, hot lapping it.
Before I start throwing parts at it I would appreciate some insight from anybody who has seen something similar.
Maybe the fuel pump is giving up but I don't think so because the car will light right up 2 hours later when the fuel bowl fills with 7 pounds on the regulator. Thanks ahead of time for your insight.