I want to use my NOS low pressure pump to supply (via a tee piece) both my nitrous kit and my mikuni carbs. However the carbs flood badly under the 5 or so PSI the pump makes so i thought about using a regulator. There are so many about, from simple and cheap dial calibrated to more expensive with filter bowls etc. It really needs to be quite small as i'm running out of space, be adjustable from 1-5psi and it needs to flow enough fuel for my GS motor. Will any regulator with big enough inlets do and is there any i should aviod
Edited by: Bikerphil
Aviod the cheap ones like you find at places like Autozone. I found them to be a wasteof money. When you buy cheap that's what you get.
I would recommend the Holley or BG regulator & turn it down toNO more than 1.5 PSI. Ray. Edited by: suzukiray
Ok thanks for that.
Anyone have experience of this Spectre performance item
The HOLLEY regulator ... is it fairly small it's hard to tell from the website.
In peoples experience what pressure can carbs can cope with Mine are mikuni vm33 smoothbores.
Edited by: Bikerphil
THAT is the one to stay AWAY from..the holley regulator is relatively small..just need a fuel pressure gauge to set properly.. I run my pressure atjust under3lb on my s&s carb..
Mikuni makes different needle and seat assemblies for running fuel pumps. Sudco carries them.
just my thaughts but over the years i have found that the nos pump dosnt carry enough fuel valume that you will go lean on the big end i use the holly blue pump and bypass regulator and never had any more problems cost more but have had no nos problems sence we went to them on all four of our bikes. just a thought to ponder
The holly RED pump is factory set at 7lbs... WOULDNT it be PERFECT for the NOS side uncorked Think they recommended 7lbs for HIGH pressure same jet size applications
I found a holley regulator on eBay so might give that a go with the pressure right down.
I'll have to stick with the NOS pump for now as i'm only running teeny 36hp jets and the first race is in 6 weeks and i'm running out of money!!
Hopefully i will be able to upgrade things over the year as i get used to the bike and feel the need to go faster.
holley pumps deliver alot more pressure when you dissable the "built in" bypass
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