Since summer started I have been dealing with a major vapor locking issue on my 76 monza. It was so bad that after it got to operating temp ( between 190-205 degrees) and kill the car, you could literally see the air making the fuel in my clear inline filter bubble. It almost looked like it was boiling. See the car originally had single exhaust (going out the passenger side) the stock fuel line goes down the frame rail on the drivers side and goes up and across the engine compartment to my carb. but I had duel exhaust put on the car or better yet my dad did over 15 years ago and i know beleive that the exhaust pipe in too close to the metal fuel line heating it up and causing it to vapor lock.

To remedy the problem I wrapped my fuel lines in a insulation wrap ( normally used on headers but i heard it worked well for that) and replaced my factory carter electric fuel pump for a High output Holley (7 psi)

See the car ran fine unless you killed it after geting it to operating temp and after that it didnt want to crank so i was very pleased today when i got it up to operating temp and killed it and waited 5 mins and it cranked and ran like a beast

I drove it around the block after getting hot and again it did great. But there is about a 1/2 straight stretch from where i turn onto my rode to my driveway.... .... I hammerd on it and after it shifted it died ( acted like it ran outta gas which is why i know it vapor locked) and was vaporlocked because the inline was bubbling( not near as bad as it was) but it cranked rite back up after i let my pump run for idk bout 30 seconds.

I need some advice on what else i could do. Is this still going to be a problem or is it just because i hammered on it? any advice will do

thanks,

Slade


p.s I have 5/16 fuel line...idk if it matters but it is smaller than it should be