What is a good number for timing at WOT?

[RSKtakR]

I'm not sure that this question can be answered 100% because of so many variables but.... what is a good number for timing degrees at WOT for a built gen1 shortblock with stock compression (11:1 I think), stock gen 1 heads/cams, 5% OD lower, LT's, no cats, VMP gen2 blower with a 69mm upper making about 15psi, id1000 injectors with 13/14 GT500 pumps on E80? The car is PBD tuned and the last log showed 22 degrees timing at WOT and with this same tune the car laid down 731/689 in 72 degree weather with 52% humidity. I was going to have the car dyno tuned because I have a local friend with very similar mods that is tuned by Lund on the same fuel and his current tune is at 18.5 degrees at WOT. Should I just leave my current tune as it is?

 

[glittle75]

Buy new plugs, put them in.
Go WOT through a gear or 2.
Pull plugs, read plugs.

Best way to tune timing. Let the car tell you how much timing it wants.

 

[mysticsvt]

 

[stang910]

I run around 22 degrees at 15psi

 

[nate-roth]

I run 24 degrees at 8lb on E85. Your timing sounds about right, the 18.5 seems very conservative on E85.

 

[slow306stang]

I'd say you're fine with 22 degrees of timing using e80 on 15psi. My car with 12:1 compression will see 21 degrees with 30psi of boost using pump e85/c85 mix.

Is your friends car running the same power adder, boost, ect?

 

[Riddick]

I think your timing is spot on. Im running the same blower with an 82mm pulley making just shy of 10 psi and max timing is 24 degrees on E85.

 

[RSKtakR]

I just decided to leave it alone for now until I get the bigger fuel system, Id1300 injectors and ported blower/lower installed. I will just get it on the dyno then for a re-tune. I remembered that my friend that has a comparable set up (same blower, built stock compression motor, stock heads/cams, LT's) was getting the 18.5 degrees timing with a 72mm upper and stock lower as well as ID1050's and Fore fuel system. So his 18.5 degrees timing was for less boost.