C
ChrisEstes
Guest
Hi All,
I've got a 4.0L petrol V8 with an Edelbrock (Weber?) 1404 carburetor
(500 cfm) on it. I'm worried that this may be a bit much carb out of
the box and if re-jetting it and/or playing with the metering rods may
help.
At idle, I notice quite a smell from the tailpipe, which I'm guessing
is unburnt petrol. Sometimes at idle, there's a bit of smoke, which
doesn't appear to be oil (it's certainly not using any -- the engine
has less than 2000 miles on it).
I've read that you can compute the required cfm various ways:
cfm = ((ci * MaxRPM) / 3456) * 0.85
cfm = (ci * 2) * 0.85
etc. (the Internet is full of this)
I've done the math half a dozen different ways and most times I come up
with between 350 and 450 cfm required. My engine is factory stock and
I have no visions of insane performance. I just want to burn all the
petrol I pay for! All in all, my Land Rover gets passable mileage
(between 13 and 15 mpg depending on how it's driven); AFIK that's
reasonable for a SIIa 109 sitting on a D110 chassis with an R380/LT245
behind. Still, if I could squeeze an extra 5% or 10%, I'd be thrilled!
Does anyone have experience with this carb? I'd love to hear any
recommendatons regarding rejetting and playing with the metering rods.
I'm considering buying the Edelbrock calibration kit (part #1486) for
this carburetor and going as conservative as possible to see what
happens.
Thanks!
-Chris Estes-
I've got a 4.0L petrol V8 with an Edelbrock (Weber?) 1404 carburetor
(500 cfm) on it. I'm worried that this may be a bit much carb out of
the box and if re-jetting it and/or playing with the metering rods may
help.
At idle, I notice quite a smell from the tailpipe, which I'm guessing
is unburnt petrol. Sometimes at idle, there's a bit of smoke, which
doesn't appear to be oil (it's certainly not using any -- the engine
has less than 2000 miles on it).
I've read that you can compute the required cfm various ways:
cfm = ((ci * MaxRPM) / 3456) * 0.85
cfm = (ci * 2) * 0.85
etc. (the Internet is full of this)
I've done the math half a dozen different ways and most times I come up
with between 350 and 450 cfm required. My engine is factory stock and
I have no visions of insane performance. I just want to burn all the
petrol I pay for! All in all, my Land Rover gets passable mileage
(between 13 and 15 mpg depending on how it's driven); AFIK that's
reasonable for a SIIa 109 sitting on a D110 chassis with an R380/LT245
behind. Still, if I could squeeze an extra 5% or 10%, I'd be thrilled!
Does anyone have experience with this carb? I'd love to hear any
recommendatons regarding rejetting and playing with the metering rods.
I'm considering buying the Edelbrock calibration kit (part #1486) for
this carburetor and going as conservative as possible to see what
happens.
Thanks!
-Chris Estes-
