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Tunnel Ram and fuel slosh issues ? #1879282
07/27/15 05:10 PM
07/27/15 05:10 PM
Joined: Jan 2003
Posts: 2,902
A shed in England
Tig Offline OP
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Tig  Offline OP
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A shed in England
We've been chasing a weird bog that seems to effect the car 60ft or so out. Motor goes real lean and dies / noses over then comes back. Anybody use these?
http://www.quickfueltechnology.com/fuel-bowl-parts/nitrophyl-float-wedge-primary.html
Seems to make sense for the above issue.
I think we have / had other fueling issues as well.


'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
Re: Tunnel Ram and fuel slosh issues ? [Re: Tig] #1879353
07/27/15 06:04 PM
07/27/15 06:04 PM
Joined: Dec 2012
Posts: 1,823
Wind Gap,Pa.
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Sammy Offline
top fuel
Sammy  Offline
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Wind Gap,Pa.
What you need to do is get yourself some 5/16 black rubber fuel line and cut a notch in the center and attach each end of the fuel line to both vents on the carbs. Lke an arch or get yourself 4msd distributor boots 90 degree and put one on each vent and then run a small piece of that fuel line to each en of te distributor boot

Re: Tunnel Ram and fuel slosh issues ? [Re: Tig] #1879355
07/27/15 06:05 PM
07/27/15 06:05 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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Romeo MI
Are the carbs mounted front to back.. or sideways.. I
had mine on sideways and had a problem of that nature...
being that the jets are in a different place I made up
some 90* jet extensions that fixed it... I kept them right
on the bottom of the bowl to clear the float.... I did all
the jets that way... not just the rears
wave

Re: Tunnel Ram and fuel slosh issues ? [Re: Tig] #1879383
07/27/15 06:48 PM
07/27/15 06:48 PM
Joined: Dec 2012
Posts: 1,823
Wind Gap,Pa.
S
Sammy Offline
top fuel
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Wind Gap,Pa.
If your car is doing wheelies, the fuel is dumping out of the vents and sloshing into the carbs flooding them out. It doesn't take much fuel to cause this.
Fuel level in bowls should be right under the sit glass and psi no more than 6 with a good fuel pump.

Re: Tunnel Ram and fuel slosh issues ? [Re: Sammy] #1879395
07/27/15 07:07 PM
07/27/15 07:07 PM
Joined: Jan 2003
Posts: 665
Northwest Chicago Suburb
DaDart Offline
mopar
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Northwest Chicago Suburb
Mike, what did you use to make the 90's?


3 Darts and a Ram
Re: Tunnel Ram and fuel slosh issues ? [Re: DaDart] #1879423
07/27/15 07:41 PM
07/27/15 07:41 PM
Joined: Feb 2003
Posts: 989
Addison,IL
OUTLAWSSAA Offline
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Addison,IL
I use them. Mine are the one's from Braswell,but there the same design. If your carbs are turned sideways you should have those,especially if the car wheelies off the line.

Re: Tunnel Ram and fuel slosh issues ? [Re: Tig] #1879625
07/27/15 11:41 PM
07/27/15 11:41 PM
Joined: Jan 2003
Posts: 19,304
Las Vegas
Al_Alguire Offline
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Las Vegas
You need the correct floats. They are oriented right and left as well as the carbs need to be mounted front and rear and the orientation does matter. Pretty typical for a hard leaving or wheel standing car with sideways mounted carbs. Surprised they were not in there if they were ordered for a tunnel ram deal. FWIW those floats are made by Braswell for Quickfuel as are many of their parts.


"I am not ashamed to confess I am ignorant of what I do not know."

"It's never wrong to do the right thing"
Re: Tunnel Ram and fuel slosh issues ? [Re: Tig] #1881230
07/29/15 11:49 PM
07/29/15 11:49 PM
Joined: Nov 2010
Posts: 1,397
Carson City, Nevada
Biginchmopar Offline
pro stock
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Carson City, Nevada
From my experience with the sideways carbs I bought the floats from Pro Systems but a lot of carb manufactures have them. The ones you show should have a left and a right taper towards the back of the car. Once you have the correct floats and have them set correctly I'll bet a million dollars it needs bigger shot of fuel at the hit. Small tube nozzle type squirters (31's) with a bigger cam (Squirter cam).
Are you leaving wit your foot on the floor or partly down then full throttle?

Re: Tunnel Ram and fuel slosh issues ? [Re: Biginchmopar] #1881331
07/30/15 04:08 AM
07/30/15 04:08 AM
Joined: Mar 2003
Posts: 9,091
Rogue River, OR
Jeremiah Offline
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I am all ears on this one. What other tricks can we use on the tunnel ram carbs?

Re: Tunnel Ram and fuel slosh issues ? [Re: Biginchmopar] #1882279
07/31/15 03:38 PM
07/31/15 03:38 PM
Joined: Jan 2003
Posts: 2,902
A shed in England
Tig Offline OP
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Tig  Offline OP
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A shed in England
Originally Posted By Biginchmopar
From my experience with the sideways carbs I bought the floats from Pro Systems but a lot of carb manufactures have them. The ones you show should have a left and a right taper towards the back of the car. Once you have the correct floats and have them set correctly I'll bet a million dollars it needs bigger shot of fuel at the hit. Small tube nozzle type squirters (31's) with a bigger cam (Squirter cam).
Are you leaving wit your foot on the floor or partly down then full throttle?

Hi, I've ordered the wedge floats from quick fuel, we have already "upped" the squirters to .063, these are 1150 dominator carbs, yellow cam only 2 pos'n.
We've also upgraded the fuel lines to one size bigger everywhere.
We're not back out with the car until the end of August. Footbrake, Launch around 1800rpm.


'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
Re: Tunnel Ram and fuel slosh issues ? [Re: Tig] #1882359
07/31/15 05:26 PM
07/31/15 05:26 PM
Joined: Mar 2005
Posts: 2,644
North Carolina
sasquatch Offline
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North Carolina
Hey
How come I do not have a picture like that?????
Looks nice Tig....Todd

Re: Tunnel Ram and fuel slosh issues ? [Re: Tig] #1882360
07/31/15 05:27 PM
07/31/15 05:27 PM
Joined: Dec 2012
Posts: 1,823
Wind Gap,Pa.
S
Sammy Offline
top fuel
Sammy  Offline
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Joined: Dec 2012
Posts: 1,823
Wind Gap,Pa.
Originally Posted By Tig
Originally Posted By Biginchmopar
From my experience with the sideways carbs I bought the floats from Pro Systems but a lot of carb manufactures have them. The ones you show should have a left and a right taper towards the back of the car. Once you have the correct floats and have them set correctly I'll bet a million dollars it needs bigger shot of fuel at the hit. Small tube nozzle type squirters (31's) with a bigger cam (Squirter cam).
Are you leaving wit your foot on the floor or partly down then full throttle?

Hi, I've ordered the wedge floats from quick fuel, we have already "upped" the squirters to .063, these are 1150 dominator carbs, yellow cam only 2 pos'n.
We've also upgraded the fuel lines to one size bigger everywhere.
We're not back out with the car until the end of August. Footbrake, Launch around 1800rpm.




When this doesn't solve your problem, refer to my post. Been there done that. Your carbs ,if they are the sideways mounted carbs from the factory already have the correct floats in them already.

Re: Tunnel Ram and fuel slosh issues ? [Re: Tig] #1882397
07/31/15 06:29 PM
07/31/15 06:29 PM
Joined: Jan 2003
Posts: 2,902
A shed in England
Tig Offline OP
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Tig  Offline OP
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A shed in England
Sammy, the car goes lean on the AFR's. If the fuel was dumping into the carb from the vents I would expect it to go rich. However sometimes stuff doesn't work out how you think so we also done the vent tube thing, still had the issue.
I'm thinking we've had a number of fuel related problems, those being at least: fuel line to small, more squirter needed and this "fuel in bowl control" issue.
Todd, I have a bunch of pretty pictures I can send, here's another one.


'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
Re: Tunnel Ram and fuel slosh issues ? [Re: Tig] #1882416
07/31/15 06:57 PM
07/31/15 06:57 PM
Joined: Mar 2003
Posts: 9,091
Rogue River, OR
Jeremiah Offline
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Tig that looks awesome. I appreciate the pictures because they help me plan my t-ram build.

What fuel system are you guys using? Also what size lines have you plumbed it with?

Re: Tunnel Ram and fuel slosh issues ? [Re: Tig] #1882429
07/31/15 07:36 PM
07/31/15 07:36 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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Romeo MI
I doubt that the fuel line is too small if its falling on its face
right off the line and being that you foot brake at 3800 rpm..
also if those are 1100 carbs I doubt the needle and seats are too
small(most likely .130)
wave

Last edited by MR_P_BODY; 07/31/15 07:38 PM.
Re: Tunnel Ram and fuel slosh issues ? [Re: Tig] #1882519
07/31/15 10:23 PM
07/31/15 10:23 PM
Joined: Jul 2004
Posts: 653
Fredericksburg Va
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plycuda Offline
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Fredericksburg Va
my car did the same thing. ran fine with a single 4 on top of the tunnel ram. When I put the other top on with the second dominator it fell on its face. tried messing with everything. it came down to I was coming out too low of rpm to keep a good signal on the carbs so it would go lean. loosened the converter and bingo

Re: Tunnel Ram and fuel slosh issues ? [Re: Tig] #1882729
08/01/15 06:07 AM
08/01/15 06:07 AM
Joined: Nov 2010
Posts: 1,397
Carson City, Nevada
Biginchmopar Offline
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Carson City, Nevada
Try using .35 - .41 squirters (tube type) and a pink cam on the number two hole.
This will give you a longer squirt ie more time of adding fuel.
Once again make sure the floats are set correctly.

Re: Tunnel Ram and fuel slosh issues ? [Re: Tig] #1882738
08/01/15 08:12 AM
08/01/15 08:12 AM
Joined: Jan 2003
Posts: 2,902
A shed in England
Tig Offline OP
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Tig  Offline OP
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Posts: 2,902
A shed in England
It isn't falling on it's face off the hit, it's usually 40 - 60 ft out. We log the AFRs (left and right), you can see the lean spikes, sometime right where the converter stalls, sometimes .3 -.4 seconds later.
Also we have seen a double lean spike, like the fuel moved away from the jets, then returned when it stumbled and then did it again.
Were running a Magnafuel 500 fuel pump and now have -8's to the carb, -12 main feed to reg, and 2 -10's from the the tank to the pump.
Changing the lines from -6 to -8 on the carbs helped we came down 2 sizes on the main jets as it was too rich after that.
AFR's also go richer towards the end of each gear change, typical 3rd gear might start at 13.1 and end at 11.9.
I didn't know the 4150 pump cams would work with a 4500 carb, or do they have to be modified.
Thanks for the answers so far up


'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
Re: Tunnel Ram and fuel slosh issues ? [Re: Tig] #1882750
08/01/15 09:45 AM
08/01/15 09:45 AM
Joined: Dec 2014
Posts: 304
Florida
M
Mark Whitener Offline
enthusiast
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Posts: 304
Florida
When you put the floats in, wedge to the rear, turn the bowl upside down, measure the distance between the top of the float and inside top of the bowl. Set the float level to .425. Make sure fuel pressure isn't over 6 psi.


Mark Whitener
[url=www.racingfuelsystems.com[/url]
Re: Tunnel Ram and fuel slosh issues ? [Re: Mark Whitener] #1894572
08/18/15 05:33 PM
08/18/15 05:33 PM
Joined: Jan 2003
Posts: 2,902
A shed in England
Tig Offline OP
master
Tig  Offline OP
master

Joined: Jan 2003
Posts: 2,902
A shed in England
Originally Posted By Mark Whitener
When you put the floats in, wedge to the rear, turn the bowl upside down, measure the distance between the top of the float and inside top of the bowl. Set the float level to .425. Make sure fuel pressure isn't over 6 psi.

Done, done and done, just need to get down the track now up


'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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