Been along time since I’ve seen a Holley jet. I have an 89770-1 Street Avenger. The jets have the letter “H” after the size number. Does this have any significance other than maybe indicating it’s for a Holley?
Holley Jet “H”
- Thread starter SpeedThrills
- Start date
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Locomotion
Well-Known Member
Anybody correct me if I'm wrong, but I believe there is at least one other letter involved on closer precision jets indicating flow.
i.e.: A standard #78 jet has a manufacturers tolerance. A 78H would flow on the high (rich) side of the standard tolerance..
i.e.: A standard #78 jet has a manufacturers tolerance. A 78H would flow on the high (rich) side of the standard tolerance..
Locomotion
Well-Known Member
Found this- Holley jet question - Don Terrill’s Speed-Talk
...also found - "close limit jets are +/- 1.5% and standard jets are +/- 3% from the specified flow."
But then the thread says the jet # followed by a "2" is a indicator of close tolerance jets!
...also found - "close limit jets are +/- 1.5% and standard jets are +/- 3% from the specified flow."
But then the thread says the jet # followed by a "2" is a indicator of close tolerance jets!
Post 16 of this thread talks about tolerance, as you mentioned
Locomotion. Jet size markings
I should also mention that the jets I have are black.
Maybe someone else will chime in.
Thanks Locomotion.
Locomotion. Jet size markings
I should also mention that the jets I have are black.
Maybe someone else will chime in.
Thanks Locomotion.
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