Check out my A/F from the dyno pull.............
03-19-2007, 09:27 PM
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Check out my A/F from the dyno pull............. I took just the A/F from the dyno graph and focused on that alone. Check out the attached graph and tell me what you think? I don't think that is good. From what I've heard, a lean spike happens with a wet kit. But check out how high it spikes? Kind of scary!! I'm not spraying anymore till I get this figured out.
I think I need to get a hold of TJ again and have him do some major tuning. Is this kind of spike normal for wet kits? That seems like an aweful high lean spike.
I need some major help!! Not the mental kind Ellis
Graphs:
http://i33.photobucket.com/albums/d5...e/DSC04331.jpg
http://i33.photobucket.com/albums/d5...e/DSC04330.jpg
Close up of the Graph:
http://i33.photobucket.com/albums/d5...e/DSC04328.jpg
I think I need to get a hold of TJ again and have him do some major tuning. Is this kind of spike normal for wet kits? That seems like an aweful high lean spike.
I need some major help!! Not the mental kind Ellis
Graphs:
http://i33.photobucket.com/albums/d5...e/DSC04331.jpg
http://i33.photobucket.com/albums/d5...e/DSC04330.jpg
Close up of the Graph:
http://i33.photobucket.com/albums/d5...e/DSC04328.jpg
03-19-2007, 09:50 PM
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Upgrade your fuel pump yet?
I can all but tell you that Ellis will recommend having your N2O line twice as long as your fuel line.
I can all but tell you that Ellis will recommend having your N2O line twice as long as your fuel line.
Last edited by Ryan'sSS; 03-19-2007 at 09:55 PM.
03-19-2007, 10:06 PM
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Originally Posted by Ryan'sSS
Upgrade your fuel pump yet?
I can all but tell you that Ellis will recommend having your N2O line twice as long as your fuel line.
I can all but tell you that Ellis will recommend having your N2O line twice as long as your fuel line.
I mean........that spike in my inexperienced mind is disaterous! That's why I'm praying for some more experienced inputs.
03-19-2007, 10:13 PM
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Ellis's way seems to work really well for him. He has a puff of black smoke when his kit hits. Thats proof its on the rich side.
Russ went to a bigger fuel jet on his kit but he still has a lean spike when it hits.
Russ went to a bigger fuel jet on his kit but he still has a lean spike when it hits.
03-19-2007, 10:21 PM
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Originally Posted by Ryan'sSS
Ellis's way seems to work really well for him. He has a puff of black smoke when his kit hits. Thats proof its on the rich side.
Russ went to a bigger fuel jet on his kit but he still has a lean spike when it hits.
Russ went to a bigger fuel jet on his kit but he still has a lean spike when it hits.
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03-19-2007, 10:47 PM
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Hello Jon.
No expert here but I suggest you make the line changes for starters.
Some other suggestions:
Stand alone fuel system or switch over to a return system like Robert has.
Electric boost-a-pump to provide you with more fuel.
Timing tuner to pull back some timing at the top end.
Thanks, Perry
No expert here but I suggest you make the line changes for starters.
Some other suggestions:
Stand alone fuel system or switch over to a return system like Robert has.
Electric boost-a-pump to provide you with more fuel.
Timing tuner to pull back some timing at the top end.
Thanks, Perry
03-19-2007, 10:59 PM
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Originally Posted by 00Vette
True..........but the lean spike that Russ's car makes is way way shorter than mine. My spike is more of a curve. Russ's is just that..........a spike.
I wouldn't spray that again until you get that fixed.
03-19-2007, 11:11 PM
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Originally Posted by NVME
Make that nitrous line longer like Perry said. I have a stand alone fuel system I will let go crazy cheap, Jon! PM me for my number if you're interested.
03-19-2007, 11:49 PM
#13
The vette takes a special stand alone, and the only one who makes it is Nitro Dave, and he also has one, at my request, for guys running the Vararam. I will be using his Vararam tank for my stand alone system for dry users I am putting together.
Fuel problem, my take, same as last year (remember running 10.x:1 a/f with the same lean condition in the begining), fuel supply problem ie: as Perry said, return and reg at the rails. However, as everyone stated try the line lenghts first, it can help to minimise and sometimes eliminate intitial leaness. But i still say supply can't keep up for a minute then recovers and that's different from a lean spike. Or you could go dry and have no lean spike.
Robert
Fuel problem, my take, same as last year (remember running 10.x:1 a/f with the same lean condition in the begining), fuel supply problem ie: as Perry said, return and reg at the rails. However, as everyone stated try the line lenghts first, it can help to minimise and sometimes eliminate intitial leaness. But i still say supply can't keep up for a minute then recovers and that's different from a lean spike. Or you could go dry and have no lean spike.
Robert
03-20-2007, 12:22 AM
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Originally Posted by Robert56
The vette takes a special stand alone, and the only one who makes it is Nitro Dave, and he also has one, at my request, for guys running the Vararam. I will be using his Vararam tank for my stand alone system for dry users I am putting together.
Fuel problem, my take, same as last year (remember running 10.x:1 a/f with the same lean condition in the begining), fuel supply problem ie: as Perry said, return and reg at the rails. However, as everyone stated try the line lenghts first, it can help to minimise and sometimes eliminate intitial leaness. But i still say supply can't keep up for a minute then recovers and that's different from a lean spike. Or you could go dry and have no lean spike.
Robert
Fuel problem, my take, same as last year (remember running 10.x:1 a/f with the same lean condition in the begining), fuel supply problem ie: as Perry said, return and reg at the rails. However, as everyone stated try the line lenghts first, it can help to minimise and sometimes eliminate intitial leaness. But i still say supply can't keep up for a minute then recovers and that's different from a lean spike. Or you could go dry and have no lean spike.
Robert
03-20-2007, 01:12 AM
#15
Originally Posted by Ryan'sSS
Russ had the same problem as you and then went to the bigger jet and that helped all but the inital spike.
I wouldn't spray that again until you get that fixed.
I wouldn't spray that again until you get that fixed.
yeah,
mine was huge with the "100 jets"
I jetted up to the 150hp fuel jet
and still have a "spike"
will have ellis make me a longer line next time the car is in
03-20-2007, 07:14 AM
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I have a dedicated set-up button that pushes fuel only to the nozzle before I spray. In other words, I purge the air out of my fuel supply. I don't have any hard readings on the effect other than a way to watch for knock but I do have the assurance that gas is ready at the nozzle the moment the nitrous solenoid opens. I always worried about an empty fuel line lagging behind the nitrous.
03-20-2007, 09:39 AM
#18
I would start with fuel line lengths. You may also need a fuel accumulator.
Before we started playing with mine I was getting a 16:1 lean spike. Now I get a 10:1 Rich spike and that is how I like it
After the hit she leans up to my normal 11.0 to 11.2 from 4,000 to 7,200
Before we started playing with mine I was getting a 16:1 lean spike. Now I get a 10:1 Rich spike and that is how I like it
After the hit she leans up to my normal 11.0 to 11.2 from 4,000 to 7,200
03-20-2007, 10:57 AM
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Originally Posted by TwoFast4Lv
I would start with fuel line lengths. You may also need a fuel accumulator.
Before we started playing with mine I was getting a 16:1 lean spike. Now I get a 10:1 Rich spike and that is how I like it After the hit she leans up to my normal 11.0 to 11.2 from 4,000 to 7,200
Before we started playing with mine I was getting a 16:1 lean spike. Now I get a 10:1 Rich spike and that is how I like it
After the hit she leans up to my normal 11.0 to 11.2 from 4,000 to 7,200Thanks Ellis.
