hemi race carbs

63 savoy · 10-16-2011, 07:55 PM

anyone have a fix for constantly changing float settings in the holley 4236 and 4235 hemi cross ram carbs --it seems as though they will not hold a setting--tried different floats , seats etc.stumped--Mike

Paul Precht · 10-16-2011, 09:26 PM

Just a thought but I'm thinking too much fuel pressure or faulty needle and seats.

Phillip marvetz · 10-17-2011, 02:10 AM

I've had the same problem, It's not fuel pressure related.

63 savoy · 10-17-2011, 09:21 AM

got a return fuel system at 6 #----I wonder if the angles where the float touches the needle are not quite right---you set the floats, make a pass, and then there is fuel everyplace---almost like the floats are getting heavy---somebody must have the fix for this---Mike

Ed Wright · 10-17-2011, 11:57 AM

How are you setting the floats? With the sight plug in the side? I don't know too many racers that do that. Take the bowls off, turn them upside down, and use a drill bit for a gauge between the top of the bowl and top of the float. Most use either a 3/8" or 7/16" bit for a gauge. I think if you do that, then recheck them later you will find the float level is not changing, but that you have other problems.
What do you mean "fuel everywhere"? Fuel sloshing out the vents? That is not a float level changing problem. Try a 7/16" dril bit first. If the carbs are set front-to-rear, not cross ways, you will probably want to use a 3/8" on the rear bowls.

BlueOval Ralph · 10-17-2011, 01:17 PM

These carbs are not center pivot float bowls (the 3/8 drill is fine for center pivot bowls) the Hemi float bowls are the side pivot bowls ( just like the old 660's or the Ford Holleys for the 427's) for side pivots start with a 5/16ths drill.
Ralph

Quote:

Originally Posted by Ed Wright

How are you setting the floats? With the sight plug in the side? I don't know too many racers that do that. Take the bowls off, turn them upside down, and use a drill bit for a gauge between the top of the bowl and top of the float. Most use either a 3/8" or 7/16" bit for a gauge. I think if you do that, then recheck them later you will find the float level is not changing, but that you have other problems.
What do you mean "fuel everywhere"? Fuel sloshing out the vents? That is not a float level changing problem. Try a 7/16" dril bit first. If the carbs are set front-to-rear, not cross ways, you will probably want to use a 3/8" on the rear bowls.

10-16-2011, 07:55 PM	#1
63 savoy Junior Member Join Date: Jul 2011 Location: Burlington,Ontario Posts: 7 Likes: 0 Liked 0 Times in 0 Posts	hemi race carbs anyone have a fix for constantly changing float settings in the holley 4236 and 4235 hemi cross ram carbs --it seems as though they will not hold a setting--tried different floats , seats etc.stumped--Mike

10-16-2011, 09:26 PM	#2
Paul Precht Senior Member Join Date: Dec 2001 Location: Elysburg, Pa Posts: 728 Likes: 352 Liked 307 Times in 116 Posts	Re: hemi race carbs Just a thought but I'm thinking too much fuel pressure or faulty needle and seats.

10-17-2011, 02:10 AM	#3
Phillip marvetz Senior Member Join Date: Oct 2008 Location: Lynden ,WA Posts: 820 Likes: 0 Liked 3 Times in 3 Posts	Re: hemi race carbs I've had the same problem, It's not fuel pressure related. __________________ 2009 V/SA Record Holder

10-17-2011, 09:21 AM	#4
63 savoy Junior Member Join Date: Jul 2011 Location: Burlington,Ontario Posts: 7 Likes: 0 Liked 0 Times in 0 Posts	Re: hemi race carbs got a return fuel system at 6 #----I wonder if the angles where the float touches the needle are not quite right---you set the floats, make a pass, and then there is fuel everyplace---almost like the floats are getting heavy---somebody must have the fix for this---Mike

10-17-2011, 11:57 AM	#5
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: hemi race carbs How are you setting the floats? With the sight plug in the side? I don't know too many racers that do that. Take the bowls off, turn them upside down, and use a drill bit for a gauge between the top of the bowl and top of the float. Most use either a 3/8" or 7/16" bit for a gauge. I think if you do that, then recheck them later you will find the float level is not changing, but that you have other problems. What do you mean "fuel everywhere"? Fuel sloshing out the vents? That is not a float level changing problem. Try a 7/16" dril bit first. If the carbs are set front-to-rear, not cross ways, you will probably want to use a 3/8" on the rear bowls. __________________ Ed Wright 4156 SS/JA