Aussie Officially Full-On Dubber
296 posts · joined Sep 2006 ·
When running a larger diameter fuel line (8.0mm) in combination with a stock mechanical pump, will there be any negative effects on fuel pressure?
Large diameter fuel line + Stock pump
modnrod Fahrvergnugen
978 posts · joined Mar 2011 ·
From the tank to the pump, no.
From the pump to the carb? Possibly (but I've only ever used 5-6mm, so don't know).
From the pump to the carb? Possibly (but I've only ever used 5-6mm, so don't know).
psimitar Son of Jim - Creator of Good
2,506 posts · joined Jan 2009 ·
For such a short pipe run to the carb I doubt it's notice unless you're running bigger carbs but then again for bigger carbs most upgrade to an electric pump for higher flow rates.
madness is in the eye of the beholder 👍
Aussie Officially Full-On Dubber
296 posts · joined Sep 2006 ·
Yep for dual carbs. Will come out the pump on stock line and then flare up to 8.0mm before a pressure regulator (acting as t-piece) and then split off to each carb. Stock diameter line will be limited to short sections to and from pump, rest will be 8.0mm. Hoping to maximise volume from stock pump.psimitar wrote:For such a short pipe run to the carb I doubt it's notice unless you're running bigger carbs but then again for bigger carbs most upgrade to an electric pump for higher flow rates.
Want to stick with a stock pump for reliability/ease rather than elec.
psimitar Son of Jim - Creator of Good
2,506 posts · joined Jan 2009 ·
Stock pump can keep up with single venturi twin carbs like the ICT but I'm not sure for bigger twin venturi twin carb set ups.
madness is in the eye of the beholder 👍
Joel Now containing 100\% E-Wang
9,368 posts · joined Feb 2006 ·
A stock pump can keep a pair of IDAs fed.
They usually put out too much rather than not enough.
They usually put out too much rather than not enough.
fish26 Fahrvergnugen
903 posts · joined Jul 2007 ·
^^^^^ X 2, the stock fuel delivery system has no problem feeding twin carbs, there are plenty of 12sec IDA cars running stock
bitten by the bug..........several times
Aussie Officially Full-On Dubber
296 posts · joined Sep 2006 ·
That is what I am banking on, hence running a fuel reg to keep a check on pressure at higher RPM. Just hoping to get enough volume through......... this is not a race motor so do not think there should be a problem.Joel wrote:They usually put out too much rather than not enough.