Originally Posted by
tim240z
Thanks katman... No, they dont have grose jets and they are 4 screws... Its quite possible the fuel was building up in the carb and not coming out of the overflow. The more I think about it the more it seems to just be set too rich (float level) ((unless the needle and seat WAS stuck thus dumping excess fuel out of the overflow))
We're set to run the Turkey Trot next weekend and we'll have additional tools that'll help us with float setup. We also just finished modifying our airbox adding heat shielding between the carbs and header. Lastly, the wideband will be installed to get logged overall mixture readings.
No Tim, we definitely had fuel coming out the vents. I saw it in the paddock on both carbs. And those floats are right @ 14mm. If anything, I think they are lean from the view I get looking down the carb body at the fuel nozzle. If the bowls were set too high we would be rich all the time. We are just getting a temporary rich condition in one or two corners, and only when everything's hot. I think the heat shield will help, and I think we need to dial the fuel pressure down to around 3lbs given the extra volume we get to the bowls with the aeroquip feed lines. Another thought. I wonder if we are getting some pulsing from the fuel pump, and are occasionally exceeding the fuel pressure we set for the car overpowering the needle valves.
Last edited by spawpoet; 11-22-2009 at 10:23 PM.
Chris Carey
Central Florida Region
ITS/Vintage Datsun 240Z
Favorite tool to remove undercoating---- A curb!
"Understeer is when you hit the wall with the front of the car and oversteer is when you hit the wall with the rear of the car.
Horsepower is how fast you hit the wall, torque is how far you take the wall with you."
Bookmarks