- Carbs are 48 IDA's with standard float bowls;
- Facet Gold Flo electric fuel pump mounted under the tank;
- stock fuel line through tunnel then as photo below;
- Cam is a Web 86C;
- Have a Malpassi petrol king pressure regulator which is set to 3psi (my gauge has not been calibrated so this figure could be somewhat off and the real figure could indeed be slightly lower if anything);
- Ignition is a Pertronix billet distributor.
Here's the issue - when I floor it, at around 5800rpm it falls on its face. When I first had the motor built and dyno'd it made power to 7400rpm and I ran it to that a good few times so I know it's there. I had a Pertronix billet distributor in it at first and then changed to a CB Magnaspark - which is when this problem manifested itself. I have since changed back to Pertronix (not the one I had originally) and it's still doing this thing. It almost feels like the spark is being cut like a rev limiter (i do have a limiter but it's set at 7200). It will do this in all 4 gears.
In a long winded way, my question is, could this be fuel starvation or is that unlikely? Should i try bumping the fuel pressure up 0.5 psi at a time and see what effect it may have?
If not that, any idea what else is likely?
I am interested to know how quickly the bowls can be drained at wide open throttle aswell.
If anyone can give me any advice on this, I'd really appreciate it - it's quite a frustrating issue.
