I to have seen fuel pressure drop off to some degree with every mechanic fuel pump I have ever had on a motor since I installed a fuel pressure gauge and it’s perfectly normal since the diagram gets softer with heat.
As mentioned in post #6 if your only having an issue when things are hot then I would also say you should investigate if the fuel is boiling or not.
I properly set up float and properly bent and loaded retainer arm ( what the float slides on to ) in a Q-jet can take 7 psi easy from what my playing around with a regulator has shown me.
On the other side of this discussion 3.5 lbs is the flat out minimum to have the motor being able to power a car even on level ground at the average rpm it takes to do 25 mph.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!
1) 1940s 100% silver 4 cup tea server set.
Two dry rotted 14 x 10 Micky Thompson slicks.
1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.
Education is what your left with once you forget things!
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