[p4msi1]

When you bumped the timing to 19 , did it feel like you freed the motor up?

Yes, Yes and did I mention Yes. LOL Here is the other reason I feel like I should start a little low on timing is because this C&S blow-thru carb has been a challenge to tune and I want to make sure the A/F is not lean as I move up the boost and RPM's. This whole combo is new and completely new to me so I have a learning curve and I don't want it to cast me custom pistons again. I plan to only make enough pulls to establish acceptable A/F then move timing up from there. I don't want to get ahead of myself chasing a big number......

[wreckmastr]

Just my but be careful running that low of timing as it will cause detonation which leads to a whole host of bottom end problems. I'm not sure what you plan on running for total boost in the end but I would say start out at 10 to 12 degrees below what your total is now as a starting point and read the plugs from there.

Completely different combo I know but my base timing is 36 degrees and at full boost of 45lbs it's at 27.5 degrees.

[p4msi1]

Originally Posted by wreckmastr

Just my but be careful running that low of timing as it will cause detonation which leads to a whole host of bottom end problems. I'm not sure what you plan on running for total boost in the end but I would say start out at 10 to 12 degrees below what your total is now as a starting point and read the plugs from there.

Completely different combo I know but my base timing is 36 degrees and at full boost of 45lbs it's at 27.5 degrees.

Thanks Billy,

aren't you running straight alcohol?

[p4msi1]

Just the fact that you can say bumping the timing only 4 degrees really freed up the motor is telling you that you're heading in the right direction.. Follow the signs . 15 degrees of total timing is very low.. Scary low in my opinion. A 200 shot is more destructive then 15 psi in my opinion. A 200 shot on a bench test sends a manifold flying up off the bench ! lol. Dont mind me im just thinking out loud here !

Makes total sense so I will keep it at 19 because it did like that! I know it is running slightly lean at 8.4 on the E85 scale, so I need to put a little more jet in it.

Man, you guys have been so helpful!!!!!!!!!!!!!!!!!!!

Steve

[wreckmastr]

Originally Posted by p4msi1

Thanks Billy,

aren't you running straight alcohol?

Gas Q-16