.150 needle and seats sealing????

Posted By: dodgeram1998

.150 needle and seats sealing???? - 08/06/14 01:42 AM

Arggh e-85 switched gas carb
HP 950 carb
new needle and seats float bowl adjusted fuel pressure 5.5 psi and verified with two different gauges

the bowls creep on up to spill over fuel through the booster like after two minutes or so I am suspecting leaking needle and seats

I put my gas needles .120 back in and they hold pressure fine

what gives I do not know
anyone have problems with .150 float needles

Posted By: ajcasini

Re: .150 needle and seats sealing???? - 08/06/14 01:58 AM

I have always had problems with quick fuel and holley larger needle and seats. If you don't lap them they never seal. What I have done is switched to blp titanium n&s for all my builds. The .140 is perfect for e85 carbs. That is what I use on the majority of builds. I will go bigger when the demand is there for carbs over 1250 and up.

Posted By: dodgeram1998

Re: .150 needle and seats sealing???? - 08/06/14 02:09 AM

Valve lapping compound ?
Or just dont waste the time and get the blp titanium eh ?

Thanks for the feedback
I am about to pull my hair out on a simple needle Change out . R&R and troubleshoot two hours later lol
which floats are rated also for the application?

Posted By: Quicktree

Re: .150 needle and seats sealing???? - 08/06/14 03:22 AM

Quote:

I have always had problems with quick fuel and holley larger needle and seats. If you don't lap them they never seal. What I have done is switched to blp titanium n&s for all my builds. The .140 is perfect for e85 carbs. That is what I use on the majority of builds. I will go bigger when the demand is there for carbs over 1250 and up.

I am having the same dang thing happening with my quickfuel 950, thats why I was thinking about letting you do my dominator at some point. can you explain lapping them in? are you talking about the needle and seat bore?

Posted By: Quicktree

Re: .150 needle and seats sealing???? - 08/06/14 03:24 AM

Quote:

Valve lapping compound ?
Or just dont waste the time and get the blp titanium eh ?

Thanks for the feedback
I am about to pull my hair out on a simple needle Change out . R&R and troubleshoot two hours later lol
which floats are rated also for the application?

I know the feeling I changed regulators,fuel pump,floats trying to find it

Posted By: 70AARcuda

Re: .150 needle and seats sealing???? - 08/06/14 03:30 AM

had float problems with our 950 QFT E85 carbs...had to change out brand new needle and seats for the Titanium needle and seat on one of the carbs to get the float level stop creeping..

Posted By: Quicktree

Re: .150 needle and seats sealing???? - 08/06/14 03:35 AM

where do you get the BLP n&s?

Posted By: mopar dave

Re: .150 needle and seats sealing???? - 08/06/14 03:43 AM

i have simular problem on a dominator with BLP .160 ns. 7psi or more and they dont seal, but i should be fine with 6psi anyway.

Posted By: ajcasini

Re: .150 needle and seats sealing???? - 08/06/14 03:47 AM

Blp needle and seat

To lap them in I use a little brake clean grap the end of n&s with a small needle nose pilar and lap into the seat. Doesn't need much maybe 2 min on each and you will seat the needle.

Posted By: ajcasini

Re: .150 needle and seats sealing???? - 08/06/14 03:49 AM

Quote:

i have simular problem on a dominator with BLP .160 ns. 7psi or more and they dont seal, but i should be fine with 6psi anyway.

With the 160 I wouldn't think you would need much over 5.5psi. Unless fuel demand are extremely high on your combo. With the 140 I normally run 6-6.5lbs at the most.

Posted By: mopar dave

Re: .150 needle and seats sealing???? - 08/06/14 03:54 AM

ok, thanks. thats good to know.

Posted By: dodgeram1998

Re: .150 needle and seats sealing???? - 08/06/14 05:12 AM

Posted By: dodgeram1998

Re: .150 needle and seats sealing???? - 08/06/14 06:10 PM

Any other carb companies out there that have a great seal?
BLP has to be shipped out of florida, and I was hoping to source something quicker out of some closer local warehousing?