Don't wanna hijack the thread but...

I had to use a stiff spring, like the brown or black to keep the secondaries from opening too soon. I could feel the car slow down if I put my foot into it below 2300 rpm. Too lean on primary or secondary?

Also, I just pulled my 235 apart after 125 miles. Piston crowns were already really sooty. What am I doing wrong? Should I convert to a 4150 secondary block so I can change secondary jets?

Still can't figgure if Im too lean or rich.

thanks

chip

Preaching the Hot Rod Gospel according to the 4-stroke apostles:

Suck, Squish, Fire and Fumes