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Originally Posted by chicane
Yeah... it sure did.
The problem with the engine during decel is a possibility of one or more things. The first is the vent tubes spilling over into the carb venturi... which is a common problem when you get to 'that' level of braking performance. Next, would be that the engine leans out from the primary jets being uncovered. When the fuel in the bowl climbs the front of the bowl itself, it uncovers the primary jets. Not to forget to mention that if you are using stock floats... it will close the needle and seat too soon and the fuel level in the bowl will be down.
What I did to alleviate myself from these problems is:
Carb Shop floats
0.120 Viton needle and seats, front and rear
Metering plate vents, front and rear
Jet extensions on the secondary main jets
Float adjustment right to the bottom of the threads in the window
Carbs do not have any issue with g-forces... its the idiot that doesn't know how to tune the carb correctly... that has the issues. 
The next series of problem's I encountered... was with loss of oil pressure, under braking. The chassis stopped so well that the oil pretty much collected in the timing cover and uncovered the oil pick-up... even when it was run 1.5-2 qts overfull. Lets just hope you dont get there. |
Wow, what great info. Ill forwarded this info to Kevin and the guys at the shop. I will make sure they do this very thing. The carb shop did rebuild the carb, but not sure to what level. I know it cost around $600 so I'm not sure what level that went to and what changes they made. The guys were saying that the car was stopping so fast that the fuel slosh was killing the engine. The car does pull serious g forces in corners and in braking and that's why I have it set up this way, and hate the fact that the carb was limiting what I was doing. Thanks again for this info.