Hotwire Kit - loose crimps in connectors
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iTrader: (11)
Joined: Mar 2002
Posts: 12,604
Likes: 7
From: East Central Florida
Hotwire Kit - loose crimps in connectors So I finally got around to installing it this evening.
When I went to plug it in, two of the wires pulled
out of their pins. The crimps were too weak.
I pulled the pins out of the body with needlenose
pliers, soldered the wires in and fixed the keeper
tang so it's all OK. I pulled the fat power and ground
pins by their wires, seeing as the pins come out
easily enough, and soldered them too for luck. The
rest of the wires' crimps seemed good enough.
I wonder if this was known to the fellow who sold me
the kit, used (unused). Because it was way too easy
for the wires to come out, and I was able to slide the
stripped ends right back in. I only noticed a flapping
wire while installing and said "WTF?". Not griefing on
it at all, just plugging and twisting.
I recommend if you do this, check all the wires with
about 10 pounds of pull force. More than that and you
may pull the pins.
Haven't gotten to measure the fuel pressure at WOT
to see if it's improved things any, yet. But at least it
is running so I guess the episode has no downside.
When I went to plug it in, two of the wires pulled
out of their pins. The crimps were too weak.
I pulled the pins out of the body with needlenose
pliers, soldered the wires in and fixed the keeper
tang so it's all OK. I pulled the fat power and ground
pins by their wires, seeing as the pins come out
easily enough, and soldered them too for luck. The
rest of the wires' crimps seemed good enough.
I wonder if this was known to the fellow who sold me
the kit, used (unused). Because it was way too easy
for the wires to come out, and I was able to slide the
stripped ends right back in. I only noticed a flapping
wire while installing and said "WTF?". Not griefing on
it at all, just plugging and twisting.
I recommend if you do this, check all the wires with
about 10 pounds of pull force. More than that and you
may pull the pins.
Haven't gotten to measure the fuel pressure at WOT
to see if it's improved things any, yet. But at least it
is running so I guess the episode has no downside.
Thread Starter
Moderator
iTrader: (11)
Joined: Mar 2002
Posts: 12,604
Likes: 7
From: East Central Florida
Got to run it today.
Before install: 58PSI idle, 52PSI WOT = 6PSI fade
After install: 59PSI idle, 54PSI WOT = 5PSI fade
So a very minor improvement in WOT fuel pressure,
still substantially off from the fuel delivery model
I tune against. The remaining 5PSI drop must be
plumbing losses.
I guess if you are seeing 6PSI fuel fade or less, this
upgrade is not going to solve anything for you. More,
you might at least suspect electrical losses as a
factor. Presumably this is more significant on a car
with a beefier pump and more fuel demand. But on
a stocker, or small cam NA car, I think it's money and
time better spent elsewhere.
Before install: 58PSI idle, 52PSI WOT = 6PSI fade
After install: 59PSI idle, 54PSI WOT = 5PSI fade
So a very minor improvement in WOT fuel pressure,
still substantially off from the fuel delivery model
I tune against. The remaining 5PSI drop must be
plumbing losses.
I guess if you are seeing 6PSI fuel fade or less, this
upgrade is not going to solve anything for you. More,
you might at least suspect electrical losses as a
factor. Presumably this is more significant on a car
with a beefier pump and more fuel demand. But on
a stocker, or small cam NA car, I think it's money and
time better spent elsewhere.
A hot wire kit can improve pump output by an easy 10-15%.
Usually when you are out of pump capacity, pressure will fall severely. It will suddenly fall 10 or more psi, not a gradual drop as rpm rises.
The idle pressure usually rises due to the regulator being unable to return the excess fuel as the pump flow increases at idle.
What you are likely seeing is line loss. A hotwire kit cannot make up for any line pressure losses as these are caused by a poorly located regulator (thanks GM). You will always see that type of loss with a rear mounted regulator.
Usually when you are out of pump capacity, pressure will fall severely. It will suddenly fall 10 or more psi, not a gradual drop as rpm rises.
The idle pressure usually rises due to the regulator being unable to return the excess fuel as the pump flow increases at idle.
What you are likely seeing is line loss. A hotwire kit cannot make up for any line pressure losses as these are caused by a poorly located regulator (thanks GM). You will always see that type of loss with a rear mounted regulator.
