- Joined
- 15 May 2004
- Messages
- 6,898
I've a CTSC since one year. Till now I've used the OEM pump + voltage booster. Today we've installed a Walbro 255 to get wrid of the voltage booster. The voltage booster was by-passed, also the fuel-pump-resistor.
Before I had AFR = 11 or lower as soon as boost was building up, regardless of rpm and time of load.
Now with the Walbro 255, at lower rpms AFR is around 12 at higher revs around 13 and from 2k rpm to 6k rpm it goes up to freaking 13-13.5. It visually leans out.
There seems to be a bottle-neck but I don't know where. The Walbro 255 is said to deliver enough fuel for a low-boost CTSC but also consumes around doulbe the current of the OEM fuel-pump.
Any hints highly appreciated.
Thanks!
Before I had AFR = 11 or lower as soon as boost was building up, regardless of rpm and time of load.
Now with the Walbro 255, at lower rpms AFR is around 12 at higher revs around 13 and from 2k rpm to 6k rpm it goes up to freaking 13-13.5. It visually leans out.
There seems to be a bottle-neck but I don't know where. The Walbro 255 is said to deliver enough fuel for a low-boost CTSC but also consumes around doulbe the current of the OEM fuel-pump.
Any hints highly appreciated.
Thanks!