Since there is not a lot to search right now, Clone cutting out @ WOT

[SHIFT664]

At the track, pump wasn't pumping, changed it to a new one, still cutting out @ WOT. SO I changed carbs, same thing. I changed back to stock FW and key, same result. what could it be? It will rev to 5k, then cut in and out. Is it cause its not under a load or am I missing something?

 

[Wynn Racing]

Replace plug and coil. Most likely the coil, we've had two do this. Builder told me the aluminum flywheel is rough on the coils, he replaces coil with every re-build.

 

[Hellion25]

Replace plug and coil. Most likely the coil, we've had two do this. Builder told me the aluminum flywheel is rough on the coils, he replaces coil with every re-build.

Agree we've had the same problems and that's what's fixed it

 

[SHIFT664]

The thing about the fw is, it's a steel billet. I have only ran down the street with it, and only, a few times. I had to change it back from big filter and header to box stock, spec pipe and stock air box. That's why I changed the carb. too.

 

[Hellion25]

What size main jet

 

[Jody / ARC Racing]

Replace plug and coil. Most likely the coil, we've had two do this. Builder told me the aluminum flywheel is rough on the coils, he replaces coil with every re-build.

This is why we recommend NO LESS than .030 coil gap. Most find that there engines run and respond better at .040 to .050

 

[SHIFT664]

What size main jet

To be honest, I am not sure. Looking into that today. I think thats what it is. Last plug I pulled was nice and black. That means too much fuel and not enough air, correct?

 

[Hellion25]

To be honest, I am not sure. Looking into that today. I think thats what it is. Last plug I pulled was nice and black. That means too much fuel and not enough air, correct?

Yea for gas our main jet is a .39 and lowside is a .24

 

[496 BB]

Springs???

 

[DynoDon]

Replace plug and coil. Most likely the coil, we've had two do this. Builder told me the aluminum flywheel is rough on the coils, he replaces coil with every re-build.

Someone is making money on coils!!! I have never replaced a coil on any of my stock engines that have been rebuilt. Many rebuilds. Not saying that one won't go bad here and there but to replace a coil on every rebuild makes no sense. Shucks, that new coil could go bad before the old one did. Now keeping a spare coil is wise.

 

[SHIFT664]

I put a stock carb. on it and it seems to be fixed. It revved good and didnt cut out, up to 6400rpm.

 

[C&L_MOTORSPORTS]

Shift, what kind of springs are you running and what did you set the valve clearance at? You don't have the vent holes covered with the filter adapter gasket do you. seems Dyno Don had similar problem and the gasket solved it.
jmo

 

[SHIFT664]

10.8's and gaskets where right. I think it was the carb jetted for big filter. put stock box and carb on and seem to fix it. I will know tomorrow