Thanks Dave for getting this pic on here for me!
OK, let's see...
The doted lines are the HP ones, the straight lines are torque.
PLEASE give them a close look!
First of all, these graphs differ ( power wise ) from the older ones because I have just replaced the nozzles with taller ones. Being that I'm still on the stock CP3 I have not gained any power but LOST power! That's due to the fact that the stock CP3 is just maxed out. @ 3500 RPM the RP is down to 22K!
Anyway, what I'm wanting to show you is not the max number but what happens when the timing is over advanced. Before you ask, nope there's no typo! The HLT's indicate exactly the power they belong to!
I have done 3 runs for each HLT. Except for the # 40. That one I have repeated only twice because I was affraid for my engine. I have waited about 20 minutes between each run to get the heat soak out of the engine.
The graphs I took were the middle ones. The difference between the best and to worst run is in the 5 Hp range anyway.
Now if you look at the Graphs you'll see that some power was gained going from HLT 20 to 30. HUGH power was lost stepping up from HLT # 30 to HLT # 40.
If I was on the dyno for the first time with my truck, I would then step down to HLT # 35 and see how that goes. Then decide if I need more or less timing.
Now to come to the point. As you can see, as the timing is raised, "some" power is gained. After a certain point, advancing the timing further the power loss is hugh.
I let you immagine how happy the engine is with an over advanced timing.
On the dyno the engine still sounded good with HLT # 40! BUT what was going on in the cylinders??? With too much timing the result will be only one:
BANG!
Now keep one last thing in mind. The difference in timing advance between # 20 and # 30 and then between # 30 and # 40 is exaclty the same. The first one provides the performance we're seeking for , the second one will hurt you in no time.
OK?
Thanks,
Marco