cyrus77

iTrader: (4)

Holley EFI Timing tables. Can anyone share what they run. I am interested in values that everyone is running on NA setups.Here is mine on 502 with afr heads.

Boatally Insane

iTrader: (1)

Mine was supercharged so I don't know if it'll help any

If you send me your email I can shoot over my HEFI file...


Doug

ICDEDPPL

iTrader: (1)

Can you post one with PSI instead of kpa..

articfriends

iTrader: (1)

I can tell you this, when I dyno they usually like more like around, 28 in midrange approaching tq peak (below it) and 32, 33 w afr heads after 4800, 5000(I think thats what you told me you had for heads, Smitty)

ICDEDPPL

iTrader: (1)

Personally what my motors wants for timing is still a damn mystery to me.
30* at 4000 and 2# of boost or 27* ?? I have no ducking clue lol.
This past weekend I made a switch to add 3* of timing , (at any speed)
was data logging it , adding 3* and seeing if rpm increased indicating the engine likes it .. but I would need calm water (not happening on lake michigan) and a bunch of time to get this testing done .
I think next I`ll pull timing and see what happens.

Data log: Purple: timing switch on
Yellow : timing
Green: RPM
29* at 4000 increased to 32* not change in rpm. Maybe it wants less than 29*
Only thing I noticed is the EGTS dropped 20-25* but that don`t tell me a whole lot

Artic you do a lot of dyno testing , any info you can share ?





The bump is a wave
Timing goes up (yellow) but RPM never changes (green)

sutphen 30

less timing will raise the egt's,,if anything,,go up a degree or 2.you won't see much in speed or rpm,you'll just make your exhaust valves happy.
I usually dyno tune for the timing table and get the afr's some what correct.then in the boat I make the afr's right and leave timing alone,unless i'm bouncing off the knock sensor.

Cerberus66

can you give us more info on cam specs, compression etc? idle area should be about the same otherwise you start surge and it makes your IAC work overtime and I wonder if you are using idle timing adjustments or if you have the turned off. also you sheet should basically be lock out and not growing otherwise you are not getting the best out of your engine.

b18cls1

if egt drops when timing is added then you were under timed. You have to look at dimisnishing return for egt vs deg.