proper float height, QJet
Thread Starter
Melting Slicks
Joined: Feb 2000
Posts: 3,052
Likes: 0
From: Vancouver BC, Canada
proper float height, QJet
1/4 or 3/8? street-driven, stock.
i've heard both, my instructions say 1/4, lars says .375-.400.
what characteristics will the different heights provide?
thanks :cheers:
i've heard both, my instructions say 1/4, lars says .375-.400.
what characteristics will the different heights provide?
thanks :cheers:
Melting Slicks
Joined: Feb 2001
Posts: 3,330
Likes: 13
From: Europe , Luxembourg
Re: proper float height, QJet (Turbo-Jet)
Hi
Can't help you on your Q-jet, but I had some problems with my Holley.
It's a 650 double pumper mechanical secondaries and during hard acceleration, it starved before I got to 4th gear and struggled for about 5 seconds before keeping on accelerating.
I found the secondaries float level too low and adjusted it to the overflow side plug level, and, no more problem.
This hint , I also got from the Forum. Smart guys over here.
Hope somebody can explain your question.
Good luck.
Gunther
[Modified by WESCH, 4:32 PM 6/19/2002]
Can't help you on your Q-jet, but I had some problems with my Holley.
It's a 650 double pumper mechanical secondaries and during hard acceleration, it starved before I got to 4th gear and struggled for about 5 seconds before keeping on accelerating.
I found the secondaries float level too low and adjusted it to the overflow side plug level, and, no more problem.
This hint , I also got from the Forum. Smart guys over here.
Hope somebody can explain your question.
Good luck.
Gunther
[Modified by WESCH, 4:32 PM 6/19/2002]
Intermediate
Joined: May 2002
Posts: 29
Likes: 0
From: Englewood FL
Re: proper float height, QJet (Turbo-Jet)
Sorry to tag along on your thread Turbo-Jet but I'm having some float problems myself. I'm also confused about the height and were to measure. Lars says .375-.400 at the top of the rear edge of the float, rebuild kits say xx/32 measured 3/16 inch back from the front of the float?? Guess I'm confused about what is the front and what is the rear. Can someone post a pic of were to take the measurements Lars recommends?
Carb was flooding and a couple of guys said the float was too high, set it at 13/32 3/16 back and the flooding has stopped but now I have poor idle and no more whoomp! at WOT so I'm guessing it is now too low????
Thanks
Doug C.
Carb was flooding and a couple of guys said the float was too high, set it at 13/32 3/16 back and the flooding has stopped but now I have poor idle and no more whoomp! at WOT so I'm guessing it is now too low????
Thanks
Doug C.
Safety Car
Joined: May 2001
Posts: 3,758
Likes: 3
From: Surrey
Re: proper float height, QJet (RustyVette)
Usually on carbs the front of the float is taken to mean the opposite end to the end that is pivoted (I hope it's the same for q-jets as, if not, I've just set my float level wrong :lol: ). With the carb mounted as it is, the front of the float is mounted to the rear of the car :) Great, innit?!
My manual says 11/32" height at 3/16" back from the front of the float(E4ME). At about 3/16" back from the front of my float is a raised line which I assumed is the point to measure at?
Getting the float level wrong can cause havoc with your mixture (too rich, too lean, starvation, wrong crossover points between systems, etc). Hopefully somebody else will post & explain far better than I can.
:cheers:
My manual says 11/32" height at 3/16" back from the front of the float(E4ME). At about 3/16" back from the front of my float is a raised line which I assumed is the point to measure at?
Getting the float level wrong can cause havoc with your mixture (too rich, too lean, starvation, wrong crossover points between systems, etc). Hopefully somebody else will post & explain far better than I can.
:cheers:
