dr_jekyll Posted May 15, 2011 Share Posted May 15, 2011 few questions for the experienced gurus , if i was to remove the fuel dampner and run a 8 an braded hose from the filter would this allow better fuel flow and in turn allow my 550s to administer more fuel whan need or by removing the dampner and adding the thiker line, lower the fuel pressure and ask too much of the wlbro to keep the fuel pressure up in the larger displacemt of the fuel system wth no dampner before the rail ? thannk you Quote Link to comment Share on other sites More sharing options...
bignum Posted May 15, 2011 Share Posted May 15, 2011 The dampner is a restriction in the system so it is best to take it out, you shouldnt notice any drop in fuel pressure as the dampner and its line is only a foot long, 1 walbro is normaly good for around 550fwhp iirc. Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted May 15, 2011 Author Share Posted May 15, 2011 exelent , it shal swiftly meet the bin. 500 is all im looking for so that should be fine Quote Link to comment Share on other sites More sharing options...
Ian C Posted May 16, 2011 Share Posted May 16, 2011 The dampner is a restriction in the system so it is best to take it out, you shouldnt notice any drop in fuel pressure as the dampner and its line is only a foot long, 1 walbro is normaly good for around 550fwhp iirc. Hmmm, how can it be a restriction and yet not affect fuel pressure? Quote Link to comment Share on other sites More sharing options...
bignum Posted May 16, 2011 Share Posted May 16, 2011 Hmmm, how can it be a restriction and yet not affect fuel pressure? Good question, this is my logical thinking, if the dampner is a restriction which after looking at 1 i believe it is, then fuel pressure may be higher before the dampner(as if squeezing a hose down to a smaller diameter) which in turn will give a lower flow/pressure after the dampner and upto the fuel rail, remove the restriction then you have more flow(volume) and constant pressure from pump to rail, the pressure regulator will maintain the fuel pressure as long as the pump is up to the job, the walbro 255 has been proven to do the job, although there are other/better pumps available. Quote Link to comment Share on other sites More sharing options...
JamieP Posted May 16, 2011 Share Posted May 16, 2011 exelent , it shal swiftly meet the bin. 500 is all im looking for so that should be fine It wont matter for 500bhp, i did 587 on srr with one in place, it was stock fpr an all. Quote Link to comment Share on other sites More sharing options...
mellonman Posted May 16, 2011 Share Posted May 16, 2011 im using an 6 with no dampener Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted May 16, 2011 Author Share Posted May 16, 2011 i think ill ditch it anyway if ot will allow a free flow of fuel. what was the reason for it being ther in the first place ? Quote Link to comment Share on other sites More sharing options...
JamieP Posted May 16, 2011 Share Posted May 16, 2011 what was the reason for it being ther in the first place ? Clue is in the name, fuel pulsation damper, caused by the injectors opening and closing. Quote Link to comment Share on other sites More sharing options...
mellonman Posted May 17, 2011 Share Posted May 17, 2011 i would say it was there to stop your car from sounding like a diesel from in side the car,its quiet suprising how much louder the car is with out one on idle (in car only) Quote Link to comment Share on other sites More sharing options...
bignum Posted May 17, 2011 Share Posted May 17, 2011 i would say it was there to stop your car from sounding like a diesel from in side the car,its quiet suprising how much louder the car is with out one on idle (in car only) Mine sounds like a diesel lol Quote Link to comment Share on other sites More sharing options...
Ian C Posted May 17, 2011 Share Posted May 17, 2011 Good question, this is my logical thinking, if the dampner is a restriction which after looking at 1 i believe it is, then fuel pressure may be higher before the dampner(as if squeezing a hose down to a smaller diameter) which in turn will give a lower flow/pressure after the dampner and upto the fuel rail, remove the restriction then you have more flow(volume) and constant pressure from pump to rail, the pressure regulator will maintain the fuel pressure as long as the pump is up to the job, the walbro 255 has been proven to do the job, although there are other/better pumps available. I don't think you'll see a more constant fuel pressure when you take a pulsation dampener out of the system. The whole point of it is to damp out pulsations in the fuel pressure I don't think removing it has much point unless you're chopping out the entire fuel system. I'm also not convinced it's a noise supressor either. Quote Link to comment Share on other sites More sharing options...
mellonman Posted May 18, 2011 Share Posted May 18, 2011 I'm also not convinced it's a noise supressor either. my car on tick over is so much louder with out it when i got it back i thought they had messed something up! saying that every thing they did do i have had problems with so maybe i am wrong can anyone confirm if the car would run louder with out one in ? as im pooping myself now Quote Link to comment Share on other sites More sharing options...
Robzki Posted May 18, 2011 Share Posted May 18, 2011 I can't say I noticed a conceivable noise difference, possibly more of a 'ticking' from the injectors with the bonnet open, but nothing from inside the car. could be just my old ears though Quote Link to comment Share on other sites More sharing options...
mellonman Posted May 18, 2011 Share Posted May 18, 2011 it seems to be more down by the passenger footwell i cant hear it anywhere else and when i touch the throttle sightly it goes or engine noise over takes Quote Link to comment Share on other sites More sharing options...
bignum Posted May 18, 2011 Share Posted May 18, 2011 Mine was really noisey untill i relocated my adjustable fpr from off the inner wing. Quote Link to comment Share on other sites More sharing options...
mellonman Posted May 19, 2011 Share Posted May 19, 2011 thank god for that my fpr is pritty much where abouts the noise is coming from thank you for the confirmation Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted May 19, 2011 Author Share Posted May 19, 2011 ok so i should leave it in ? Quote Link to comment Share on other sites More sharing options...
Wez Posted May 19, 2011 Share Posted May 19, 2011 ok so i should leave it in ? I still have one fitted and hasn't caused me any issues, although I havent had power past 592hp, thats with a Bosch 044 in tank, stock fuel reg and rail with PE 650s Quote Link to comment Share on other sites More sharing options...
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