line length from solenoid to plate

[383coupe-UK]

Im about to fit an edelbrock performer 100hp plate kit to my 383ci chevy. I have mocked the solenoids and lines up on the plate and noticed the fuel line is about 2 inchs shorter than the nitrous line to the plate. At first i thought this was to make sure the fuel gets to the plate a fraction sooner than the nitrous to prevent a nitrous lean condition but i looked in the manual and it said in the parts list that both the solenoid to plate fuel and nitrous lines are 8inchs long so this has left me wondering if my lines should be the same length. Is this the case? Or is the fuel line meant to be shorter?

[Steve-UK]

Hi, I have Edelbrock Performer kit and my fuel line is about 2" shorter then the gas line, this has 2 effects yes it does mean the fuel should get there first, also it effects how hard the gas hits. The instructions I got with my kit said they should both be the same.:confused: ,but I phoned them and I was told that what I had was right.

[speedtweekerz]

WOW that is new one on us our kits have the same length lines. although i do not think it is anything to worry about unless it is a mounting issue. if you need a longer line let us know and we will be glad to fix you up!

[WhyHelloOfficer]

WOW that is new one on us our kits have the same length lines. although i do not think it is anything to worry about unless it is a mounting issue. if you need a longer line let us know and we will be glad to fix you up!
What would you say is the maximum length a line should be from the solenoid to the nozzle?

[mrr23]

i contemplated screwing the solenoids directly to the nozzles, but not enough room to put both on. there are plate systems now that have noids directly in them. makes for a pretty instant hit.

as far as maximum length... hard to say. the farther away, the longer it takes to get there. most kits have about 12" lines. pretty standard.

i did my dry kit on my LT1 car i had years ago pretty long. hid the noids behind the PCM. so, that would be about 3-4 feet of line from there to the bottom of the elbow. made for a pretty good hidden system.

[383coupe-UK]

Cheers for the help. Much appreciated.

[WhyHelloOfficer]

i contemplated screwing the solenoids directly to the nozzles, but not enough room to put both on. there are plate systems now that have noids directly in them. makes for a pretty instant hit.

as far as maximum length... hard to say. the farther away, the longer it takes to get there. most kits have about 12" lines. pretty standard.

i did my dry kit on my LT1 car i had years ago pretty long. hid the noids behind the PCM. so, that would be about 3-4 feet of line from there to the bottom of the elbow. made for a pretty good hidden system.

My lines are about 4.5 feet long -- the solenoids are mounted on the firewall. This shouldn't have any impact besides a slight delay of when it hits correct?

[srsnow]

It can also cause what is some times called a tail. Which is when even though the solenoid is closed it will take a second for the line after the solenoid to bleed down. How big the jet in the nozzle is plays a big part to how long it takes as well. A 50hp jet would take longer than a 150hp jet to bleed down. Normally they try and keep them to under 2 feet as a guidline

[speedtweekerz]

srsnow is correct in that it will create a "tail" but under 900 psi velocity the time it takes to empty the line is milliseconds when you are talking about a line that is less than 1 foot in length. it is beneficial however to screw the solenoid to the spray bar if possible. this creates almost no delay. however as mrr23 noted on a efi setup it is hard to do because of space. :D

[Robert56]

Line lenght on a dry hit can be used as a poor mans window switch. Also, having the nitrous line a little longer than the fuel line can help with the dreaded lean spike. Meaning, n2o travels a little faster than fuel because of pressure diifferences. Now with that said, shorter over all is better for a few reasons, instant hit, no timing lag comparing fuel to nitrous.
Robert

[evilbeef54]

Hi, I have Edelbrock Performer kit and my fuel line is about 2" shorter then the gas line, this has 2 effects yes it does mean the fuel should get there first, also it effects how hard the gas hits. The instructions I got with my kit said they should both be the same.:confused: ,but I phoned them and I was told that what I had was right.

same situation with the same kit, i too thought about hooking the selinoids directly to the spray bar but 2 problems 1) PITFA to change out jet sizes 2) i ended up stripping out the fitting on the plate and had to order another from edelbrock i ended up using the included lines and am happy with the way it is now