Anyone know what the difference would be between a P-8 @ 4.0 vs a Q-0 @3.5? Is there a graph or something that shows the different flow rates of these?
Trying to figure out if one initially flows more then the other. Same for max flow.
Thanks.
Trying to figure out if one initially flows more then the other. Same for max flow.
Thanks.
mopar1rules
Active member
i can give you the needle jet orfice diameters, straight from my aaen carb tuning handbook......P-8 is 2.69" and Q-0 is 2.7". the difference is only .010". my opinion is that they would flow pretty close to the same, due to the needle height.....4 on P-9, versus 3.5 on Q-0. i don't have any flow charts that have the needle jets you are asking about...sorry.
bufalobob
Member
the flow rate increase is consistant between needle clip height & tube size. example: mopar says the difference between a P-8 & Q-0 is .010. that would make each of the 5 clip positions .002 richer progressively. which in turn would mean that Q-0 #1 position would be .002 richer than P-8 #5. so if you are @ P-8 #5 & still too lean in the midrange you would install a Q-0 tube @ #1.
bob
bob
So I'm currently running P-8 @ 4, was going to switch to Q-0 @ 3.5 thinking it might be a little leaner initially, but finish off about the same. Last thing this setup needs is more fuel. Was actually considering the switch to try and save some.
Thought I read a post that said if you go past E-Clip 3 it was more efficient to go up a needle size and start @ 1.5 (or something close to that). Which is was lead me to believe there was a fair amount of overlap between them.
Anyone???
Thought I read a post that said if you go past E-Clip 3 it was more efficient to go up a needle size and start @ 1.5 (or something close to that). Which is was lead me to believe there was a fair amount of overlap between them.
Anyone???
mopar1rules
Active member
bufalobob said:
bob, so if i'm understanding this right, when using the Q-0 nozzle and clip position #1, it would be .002" richer than when using a P-8 nozzle and clip position #1? then w/Q-0 nozzle and clip #2, you would be .004" richer than P-8 and clip #2? or am i way off?
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bufalobob
Member
mopar:
using your figure of .010 diff. between P-8 & Q0 would mean that P-8 #1 is .010 leaner than Q-0 #1. remeber each clip position on the needle is .002 x 5 clip postions = .010 total adjustability of the same needle per needle jet. this means that a P-8 #2 is .008 leaner than a Q-0 #1. P-8 #3 would be .006 leaner than Q-0#1 & so on.
bob
using your figure of .010 diff. between P-8 & Q0 would mean that P-8 #1 is .010 leaner than Q-0 #1. remeber each clip position on the needle is .002 x 5 clip postions = .010 total adjustability of the same needle per needle jet. this means that a P-8 #2 is .008 leaner than a Q-0 #1. P-8 #3 would be .006 leaner than Q-0#1 & so on.
bob
mopar1rules
Active member
gotcha