Actual timing numbers with boost

[srt4]

Do you know about the RJC Air Distribution Power Plate?

Yes, I have one. When talking with Jason he said to mock up a leaf blower and check diffrent combo, I tried a hemco, stock, power plate. I liked the power plate the best but still was far from perfect. Now I not saying that's the same as it is as running but was intresting none the less

 

[srt4]

Anyone have per cylinder EGT data using a power plate?

 

[srt4]

I have run more timing in 109s than i run in my stage 2.

I'd assume as much, a better flowing head almost always uses less timing at peak power, which is a good thing. Your undoubtedly have your cars well sorted out. So are you willing to post your timing chart or is it secret?

 

[Ttype6]

Anyone running more than 25 degrees above 25 pounds?

19-21 are common timing numbers for e85 when making power over 600 hp. As I said earlier,the burn rate of e85 is faster than gasoline. Because of this,timing will be lower than gasoline. Don't look at timing as a goal. Look at it as a burden/something you want to avoid doing. Don't say "Hooray,I get to add more timing." Say "Son of a bitch,I had to add more timing."

 

[Jerryl]

I'd assume as much, a better flowing head almost always uses less timing at peak power, which is a good thing. . . .

Very true, especially when combined with better chamber design and better fuel vaporization.

 

[srt4]

19-21 are common timing numbers for e85 when making power over 600 hp. As I said earlier,the burn rate of e85 is faster than gasoline. Because of this,timing will be lower than gasoline. Don't look at timing as a goal. Look at it as a burden/something you want to avoid doing. Don't say "Hooray,I get to add more timing." Say "Son of a bitch,I had to add more timing."

My personal approach is to add timing till you stop making significant mph gains or HP if tuning on a dyno and take one degrees out. I also think coolant temp, ambient air temp/ intake temp have significant factors in your timing map.

 

[forcefed3.8's]

I am running 20° of timing in my stage 2. Last year i was running 17°. From 17 to 20 there was a gain of 25hp or so. Gave it 2 more degrees, and it picked up 3hp, so backed it down. I have run 21 to 23° on 9 sec iron headed engines. I havent really played on the dyno with these combos to see where they want to be. These were chip cars, and that is where the chip was set. I have 2 to dyno tune this winter/spring with xfis.

 

[srt4]

I am running 20° of timing in my stage 2. Last year i was running 17°. From 17 to 20 there was a gain of 25hp or so. Gave it 2 more degrees, and it picked up 3hp, so backed it down. I have run 21 to 23° on 9 sec iron headed engines. I havent really played on the dyno with these combos to see where they want to be. These were chip cars, and that is where the chip was set. I have 2 to dyno tune this winter/spring with xfis.

That's some great info! Thanks for sharing

 

[dank GN]

Okay with my combo I’m runing 24-25* I made 745RWHP at 17lbs . All my EGTs where in the Low 1500* F range . I do have a probe per cylinder. It is useful to even have one probe imo . It’s better to have the data and not need it then to not in my eyes. Before I had 6 probes I had one single right before the turbo and it did help me with tuning decisions

 

[bison]

Anyone running more than 25 degrees above 25 pounds?

damn

 

[BEATAV8]

I reckon that the compression ratio might be a factor affecting how much total advance to run.

 

[No disintegrations]

damn

It runs it's best 1/8 mile ever, but it's broke by the 1000 foot. --- someone smart said

 

[turbo89]

I reckon that the compression ratio might be a factor affecting how much total advance to run.

Not to mention the camshaft profile

 

[JP112_89]

Lots of people run 24* advance across the table or more back in the day with race gas. Even tuners posting in this thread Tuners usually do not go above 20* up top with any fuel now a days.
No reason to go above 19* up top imo. Boost is more knock friendly than timing....that's one reason why people choose boost over timing.

I haven't gotten out of the 20's down low. 22/19 up top with D12 at moderate boost. No problems.. Can feel a little lazy down low with stock timing with D12 fuel on my car.