Slingshot dual outlet fuel tap - output

[Oilyspanner]

I was going to post a question about the output per minute of the standard fuel tap - but I decided I was being lazy !  Mikuni jets are rated in ml/cc per minute, so my jet sizes mean I would need a minimum of 750 ml per minute to feed the carbs at WOT. I took the tank off, fitted some tubing to the fuel outlets and vacuum link. I timed 15 seconds of flow into a measuring jug (not so easy when you're sucking on the vacuum pipe) - the jug had just over 300 ml in the 15 seconds, so over 1200 ml in a minute.

So a healthy Slingshot dual outlet tap can supply more than 50 % over and above my carb requirements at maximum throttle/revs. I was worried that the tap maybe couldn't flow enough, so for now at least the standard tap stays - the membrane and mechanism of the standard tap can be problematic with time and crappy fuel residue, but all seems good. I'm glad I checked though, in the last year or so I've spent a lot of time and money on the engine, I didn't want fuel starvation to wipe out the fruits of my labours, just because I didn't check fuel flow. Just a shame the weather's gone tits up until next year 

[jonny1bump]

I've seen 10 horsepower increase by pushing on a standard fuel tap on dyno.

Obviously under performing tap but stock taps so rubbish.

Mind you pingle have there problems too but flow shed loads.

[Oilyspanner]

I have to admit I was thinking of getting a Pingle if I had delivery problems - damn expensive for what they are - much cheaper than rebuilding the engine though !  Only took 20 minutes to test, so I could test periodically, just for peace of mind - shame there aren't many options.

[clivegto]

If you have spent a lot of money on the engine why not get a better flowing tap, it can not hurt apart from a little extra cost but not a lot in the sckeem of things.

[Oilyspanner]

Well it is Christmas soon Clive, a few well chosen hints should do the trick …. making the garage stink of petrol, leaving the laptop on the Pingel dual outlet tap page, saying loudly 'I must get a new fuel tap for the big Suzuki and all will be good' !   Ho Ho Ho....