Correct

 

what kind of fuel pressure can you run with these? also when the valve closes does the fuel heat up?

 

If the valve is closed the fuel is being used. The valve only bypasses extra fuel and the Ppump is OIL cooled/lubed.

The fass and airdogs have an internal bypass too.

 

The smallest jet I tested yielded 70psi with my AirDog set at the factory 25psi...

 

The p pump is lubed by both fuel and oil

 

i just ordered the 060, gonna try it out. i really need to stop sittin in front of my computer with my credit card.....

 

heh

 

i just stretched the old spring about a 1/8 inch and then inserted a regular bic pen spring in the center of stock spring. really seems to fuel alot harder as more fuel is going to the injectors now rather then back to the tank!!!!

 

u really noticed a big difference? im anxious to put er in then

 

i did notice a big difference i do not have a fuel pressure gauge yet so i do not know what psi i'm at. but a guy who did this before got a xtra 37 hp on the dyno by doing this little trick. i'm happy with the results!!!