Originally Posted by swartzie
I just bought a new 825cfm Barry Grant Mighty Demon.
I am running this car on a RED that is going to be ran at WOT for 1/4 mile racing.
Being the factory jets that came with the carb are #76 primary and #84 Secondary, should I change out the jets and have them all one size on both the pri & sec sides?
The carb is running a little rich with this factory jetting. I was thinking of leaving the #76 in the primary and changing the #84's to both #76 on the secondaries so they are all the same and tune from there?
Is this common to have all the same jetting on a race carb that is running at WOT?
Any suggestion would be appreciated.
Thanks in advance
I guess I really don't why you bought a mighty demon for a RED instead of a race demon. The mighty demon is set up to have leaner idle circuit which is not what your looking for in WOT racing, it also doesn't have removable boosters as the race demon does. My advice would be to plug the powervalves and go 84 squared. One backfire when you start your car and powervalves are toast, richen your idle circuit a bit, and you should be ok.
Do not go 76 squared!! You will be way to lean. Your starting point should be 84 jets. The powervalve lets more fuel in, so in theory your at 84 squared now. good luck
Just wanted to edit this in case you didn't know. The might demon only has powervalves on the primaries. That's why the jets sizes are staggered. I meant to type that in and got ahead of myself. Hope that helps alittle.