MrDude_1

iTrader: (4)

ok, why is my main spark table on my 2002 LS1 so much less then my friends 99 tables?

i went online and downloaded some bins... same thing 02s have ALOT less timing then 99s.


can anyone explain why? i never compared the two side by side till last week, but i cant figure out WHY its like that...

MrDude_1

iTrader: (4)

see attached pics for tables.

first one is 99 2nd is 02
1999:

2002:

HumpinSS

iTrader: (1)

99 had EGR and a bigger cam, 01 had a more emmisions friendly cam (ie smaller) and noo egr valve

RedHardSupra

iTrader: (1)

try it, if it doesn't knock, or knocks in just few cells, it's something to try

SSpdDmon

iTrader: (10)

You'll definitely be knocking like a son of a bitch with that table. I had 2-3* KR consistently in the .56-.64g/cyl. - mid-rpm range with the stock '02 table on my Z. I backed it out a little, but I didn't want to do too much. You can go up on the top end 3-4* though.

MrDude_1

iTrader: (4)

oh, i already did.

something about 7ish degrees of knock retard made me stop.

seriously though, the engine HATED that much timing.

im curious as to why.

some of my friends with 99s (about 5 of them) have !egr !AIR, ORY and diffrent cams.. yet no knock retard... my car with the same cam, !egr !air and ORY cant take it... only diff is mine is a 02, theirs are 99s.

is there a table adding more spark in?
combustion chamber shape diff?
thicker MLS gasket make it more detontation prone?
anyone with ideas?

TAQuickness

iTrader: (28)

the cam is a bit different from '99 to '02. I believe JRP has the cam specs for all years listed in his stickies

RedHardSupra

iTrader: (1)

heh, i got a 99 with a z06 cam in it, and it hated the stock 99 timing tables, so i tried the z06 tables and it's much better. i did up it about 3degs on avg, as i don't have the nice z06 heads, so the optimal setup for me ended up about 12.6AFR and 25degs of timing. i did manage to squeeze some more power out of it by leaning it out, but i'm not risking blowing **** up for 5hp extra.

Checkmate

iTrader: (2)

My 01 loved the extra timing, stock internals+full bolt ons. I used the 98/99 table and gave it as much as possible. Ended up with 29 on the top end and between 2-3 degrees more from 3000-5000rpm.

Now my friends 01 with lid and a cat back did not like the 98/99 table. End result was 2-3 degrees less timing across the board than the stock 98/99 table.

HumpinSS

iTrader: (1)

There is an egr table that does add timing when the egr is supposed to be active. I have 0'd this table out

Cool Z

I have no problems running the 99 table on my 02 SS. The 99 table took the laziness out of my car. I even added timing in the 2400-3200 on top of the 99 table with no trouble. I do however have max timing at 27* instead of the 28* above 5400 rpm's from .72 g/cyl to 1.2 g/cyl. It pinged just a little at 28* so I backed it down.

MrDude_1

iTrader: (4)

heh... DFW isnt really at altitude either... hmm..


i still donno why my car hates it i just wish i knew WHY it doesnt like as much timing as the 99s....