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#1
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950 HP float clearance for jet extensions
I am planning on installing jet extensions on my 950 HP, has anyone clearanced the nitrophyl float using a Dremel or similar tool, or is this not a good idea?
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1972 GTO 468 2 Bolt Main w/Eagle rotating assy SD Ported 295 KRE D Ports 10.8 CR OF Hydraulic roller w/ 1.65 stainless rockers Performer RPM Intake Holley 3310 780 Vacuum Secondary TH400 with 10" Continental Convertor 8.2 BOP 4 pinion 10 Bolt with 3.36 gears 11.428/118.95/1.618 |
#2
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That will work with a wood cut Burr in the tool, but then you need to seal up your work a fuel resistant epoxy.
This makes the float heavier then stock and slower to respond to fuel level changes. Floats can be had that are made for jet extensions however and that’s the route I would go with.
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I do stuff for reasons. |
#3
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Quote:
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1972 GTO 468 2 Bolt Main w/Eagle rotating assy SD Ported 295 KRE D Ports 10.8 CR OF Hydraulic roller w/ 1.65 stainless rockers Performer RPM Intake Holley 3310 780 Vacuum Secondary TH400 with 10" Continental Convertor 8.2 BOP 4 pinion 10 Bolt with 3.36 gears 11.428/118.95/1.618 |
#4
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In the past you could buy the notched float with the jet extensions in a kit. Just an option to consider.
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'65 Tempest 467 3650# 11.30@120.31 |
#5
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That's what I've done too. Still available
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1967 GTO 416 5-spd streetcar 11's on HP low 10's 150 shot 1965 GTO 10-71 Littlefield high-helix retro/Bird (untuned) 8.44 @164 3500+lbs 10.5W's SOLD! 1964 421 GP-Sold 6.0 cert. Fiat bodied altered blown alcohol Pontiac IAII-Sold |
#6
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Jet extension and float kit ordered with a click of the mouse on Amazon Thanks all for your input.
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1972 GTO 468 2 Bolt Main w/Eagle rotating assy SD Ported 295 KRE D Ports 10.8 CR OF Hydraulic roller w/ 1.65 stainless rockers Performer RPM Intake Holley 3310 780 Vacuum Secondary TH400 with 10" Continental Convertor 8.2 BOP 4 pinion 10 Bolt with 3.36 gears 11.428/118.95/1.618 |
#7
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You are on the right path.Can you post a link to the kit. Did you see my comments regarding the type of extension used in an earlier post ?.
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Working on going faster (and now staying dry at the same time !!) |
#8
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Quote:
$66.81 Canadian. I did check your comments, Thanks
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1972 GTO 468 2 Bolt Main w/Eagle rotating assy SD Ported 295 KRE D Ports 10.8 CR OF Hydraulic roller w/ 1.65 stainless rockers Performer RPM Intake Holley 3310 780 Vacuum Secondary TH400 with 10" Continental Convertor 8.2 BOP 4 pinion 10 Bolt with 3.36 gears 11.428/118.95/1.618 |
#9
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Actually, have you opened up the rear float bowl yet? I thought Holley had at some point started sending these out equipped with jet extensions? Maybe not anymore, idk. Might be worth a look if you haven't already.
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'65 Tempest 467 3650# 11.30@120.31 |
#10
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I have the carburetor apart, it doesn't have extensions.
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1972 GTO 468 2 Bolt Main w/Eagle rotating assy SD Ported 295 KRE D Ports 10.8 CR OF Hydraulic roller w/ 1.65 stainless rockers Performer RPM Intake Holley 3310 780 Vacuum Secondary TH400 with 10" Continental Convertor 8.2 BOP 4 pinion 10 Bolt with 3.36 gears 11.428/118.95/1.618 |
#11
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Holley kit 116-10 or AED 5896 is what I have used in the past . I believe it was not much more than for just the notched float . About 50 bucks or so I recall .
Glenn |
#12
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I currently 60 foot low 1.6's without jet extensions. Is anyone 60 footing 1.5 or less without jet extensions? Just wondering at what point it really become a necessity to install extensions.
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1972 GTO 468 2 Bolt Main w/Eagle rotating assy SD Ported 295 KRE D Ports 10.8 CR OF Hydraulic roller w/ 1.65 stainless rockers Performer RPM Intake Holley 3310 780 Vacuum Secondary TH400 with 10" Continental Convertor 8.2 BOP 4 pinion 10 Bolt with 3.36 gears 11.428/118.95/1.618 |
#13
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Have you trimmed your White Plastic Vents about 1/2" shorter vs stock Holley length
and restored the opening "square" at the top of the modified vent? Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#14
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Post #71 of my Holley "Sticky" goes into how to properly modify the Holley Bowl Vent
Whistles. Info for the board. http://forums.maxperformanceinc.com/...y+Vents&page=4 Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
The Following User Says Thank You to Tom Vaught For This Useful Post: | ||
#15
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I have clearanced them and sealed with clear nail varnish before, no issues and minimal weight change.
This is on both Holley Std and Brasewell road race with the trimmed corners. I also prefer to use a BLP style extended jet, rather than the hex style extension that adds a larger volume of fuel in the now "extended well" that has to be accelerated. The BLP style leaves the jet in the original location. We did not trust the slip on flattened extensions in our application either
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Working on going faster (and now staying dry at the same time !!) |
The Following User Says Thank You to 455-4+1 For This Useful Post: | ||
#16
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Quote:
Is this why you want jet extensions? GT |
#17
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Are you running a rear PV ?
__________________
Working on going faster (and now staying dry at the same time !!) |
#18
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__________________
1972 GTO 468 2 Bolt Main w/Eagle rotating assy SD Ported 295 KRE D Ports 10.8 CR OF Hydraulic roller w/ 1.65 stainless rockers Performer RPM Intake Holley 3310 780 Vacuum Secondary TH400 with 10" Continental Convertor 8.2 BOP 4 pinion 10 Bolt with 3.36 gears 11.428/118.95/1.618 |
#19
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I don't have a stumble currently with my 3310 vac secondary. I recently picked up a 950 HP and currently have it apart. I'm considering proactively installing the extensions. On post #9 of this thread I asked if anyone has 60 footed in 1.5 or less without extensions. I'm trying to figure out at what point it typically becomes necessary.
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1972 GTO 468 2 Bolt Main w/Eagle rotating assy SD Ported 295 KRE D Ports 10.8 CR OF Hydraulic roller w/ 1.65 stainless rockers Performer RPM Intake Holley 3310 780 Vacuum Secondary TH400 with 10" Continental Convertor 8.2 BOP 4 pinion 10 Bolt with 3.36 gears 11.428/118.95/1.618 |
#20
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Quote:
Not a bad idea to add jet extensions if you want, but I'd just buy the notched floats if I were doing that, because it's not like it's expensive. Modifying floats and trying to epoxy them just goes down a rabbit hole with potential problems later down the road that I don't want to deal with. What I found both cars really needed at this power level and 60 foot capability is a good fuel delivery system. -8 line to and from with a good Walbro pump inside the tank supplying the fuel. |
The Following User Says Thank You to Formulajones For This Useful Post: | ||
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