'04 Cobra Budget Return System with DX 340's, DX hat, -8 supply, -6 return, SS filter, DX reg., (dead headed), OE rails, 80's, FRPS in place and operational. System was bought new from Lethal.
With the base pressure at 38, vac. reference off and running pressure at ~35 upon going WOT fuel pressure drops to 28psi then recovers. The fuel pressure was raised to 45 and then drops to 37 under the same circumstances on the dyno proving it's not the pumps. It has been tuned around but not ideal. Is the regulator faulty? It has 415 miles on it.
With the base pressure at 38, vac. reference off and running pressure at ~35 upon going WOT fuel pressure drops to 28psi then recovers. The fuel pressure was raised to 45 and then drops to 37 under the same circumstances on the dyno proving it's not the pumps. It has been tuned around but not ideal. Is the regulator faulty? It has 415 miles on it.