timing on big bore ???

[unclemark]

HI im running a 1100 hooper big bore and have a few ???

so how do you know when you are running to much timing or not enuf timing ??? and how can you tell if your pipes have to much choke or not enuf choke at the stinger ??

Thanks

 

[unclemark]

so is this a stupid ? or what ??
or nobody knows ??

 

[high time]

It's a guess..............

at least for me. I've done most of my tuning by seat of the pants.
A few years ago I went to higher compression and Jaws D-pipes. Seat of the pants told me that it didn't help. The pipes wern't working. They were too cold, I was told. How do you get them warm? Bring the timing back down, insulate them, or choke them. I actually figured I wanted more timing so I wrapped them and choked them. Wow, it worked. But later in the day, it developed a studder. Like a bad sparkplug wire. The pipes were too hot. I took the chokes out and been happy ever since.
With 14 to 1 heads and 3 deg. advance timing I use 1/3 race fuel at low altitude , 1,500', but at 7,000 or more just prem. with no problem.

Owen

 

[RACINSTATION]

Hightime hit it on the head. It is really different for every sled. Port timing, fuel, elevation, head volume and squish band, and pipes are all factors that contribute to the timing issue. Certain sleds love timing and others actually like to have the timing retarded (never go "full retard") for best performance.