New Engine start up

[Tom Howland]

Gary,
I did not polish the edges of the Lexan so you can’t see in the engine. But when the engine backfires up the carbs,the Lexan lights up like a light bulb. Scared me at first, I thought it was flame.
I changed the oil and filter. I forgot about the sparkplugs, thank you.

Zimmy,
You're right. I tried both rpms and the lower did work better. The 2000 rpm is to be sure you are in the idle circuit for tuning that. But that didn’t work for me. The 700 rpm is the lean best tune. I was trying two different things.
I ran the LM2 and got
2000/11.7
2500/11.4
3000/11.6
3500/12.3
Looks rich to me. I did not have a smaller idle jet. So I changed the choke to a 37 from a 40. Made it richer, lots of popping cruising at 2000 rpm .
Today I’m changing the idle jet to 60 from a 65.

[Gaz64]

Originally Posted by Tom Howland

Gary,
I did not polish the edges of the Lexan so you can’t see in the engine. But when the engine backfires up the carbs,the Lexan lights up like a light bulb. Scared me at first, I thought it was flame.
I changed the oil and filter. I forgot about the sparkplugs, thank you.

Zimmy,
You're right. I tried both rpms and the lower did work better. The 2000 rpm is to be sure you are in the idle circuit for tuning that. But that didn’t work for me. The 700 rpm is the lean best tune. I was trying two different things.
I ran the LM2 and got
2000/11.7
2500/11.4
3000/11.6
3500/12.3
Looks rich to me. I did not have a smaller idle jet. So I changed the choke to a 37 from a 40. Made it richer, lots of popping cruising at 2000 rpm .
Today I’m changing the idle jet to 60 from a 65.

Tom,

I can see you're checking for mixture strength and the effect the mixture screw has as a "trimmer" while at the mid point of the transition circuit.

Not many do this, but a very good test to prove which way to go.

Throw in your 60 idle, and your 40 chokes, or 42s if you can get them.
I run 38s in a 308.

I'd bet that 427 with a 230@.050 roller and quad IDAs is real torquey combo.

[lemans24]

On your linkage, make sure you push the gas pedal all the way down to the floor with out having it connected to the carbs (holding it to the floor), then work out the length of the linkage to the bell crank etc. so as to not pull the linkage too far when flooring it.You probably already thought of that, but I would hate to see your carbs get stuck wide open.