First log... not sure what to think

MindBlowin03 · 10-09-2003, 02:29 PM

Did my first real log today and things seem to be ok for a bit, then go nuts... check them out and tell me what you guys think I should do...

2ND GEAR
4k rpm
knock = 1
time = 18*
5k rpm
knock = 0
time = 19*
6k rpm
knock = 0
time = 24*
6.5k rpm
knock = 1
time = 21
6840 rpm
knock = 0
time = 20
SHIFT

3RD GEAR
4750 rpm (start)
knock = 0
time = 18*
5500 rpm
knock = 0
time = 22*
6k rpm
knock = 0
time = 23*
knock starts at 6281 rpm and is at 7 counts
6500 rpm
knock = 7
time = 18*
6600 rrpm
knock = 17
time = 14*
6840 rpm
knock = 29
time = 10*
SHIFT

4TH GEAR
5k rpm (start)
knock = 14
time = 14*
5500 rpm
knock = 9
time = 19*
6k rpm
knock = 5
time = 22*

knock jumps at 6100 to around 20 counts
knock stays around 20 counts until 6k and timing is around 15*

It seems that my 2nd gear is fine.. 3rd gear alos seems ok until around 6200 rpm. Then all hell breaks in 4th gear. I dont have an AFC to tune so what do you guys think I should do? My mods are in my sig.

Mike 99GSX · 10-10-2003, 09:47 AM

You need to address yor fuel situation. In the meantime I'd turn the boost down a little at a time and relog until you can get the knock counts down to a reasonable level where the timing doesn't get pulled. You'll probably be a little faster in the 1/4 even though you'll run 1 or 2 less PSI. You need to get a fuel pump, injectors and AFC.

nine5raptor · 10-10-2003, 01:13 PM

LOOKS like heat soak to me. The fact that you are showing now knock in the first 2.5 gears and then it goes all haywire means that most likely you are heat soaking the intercooler causing intake temps to go way up and therefore knock

try turning the boost down or leaving more time between runs and see what happens.

EHeye · 10-15-2003, 06:01 AM

yah sounds like heatsoak to me. Time to look at an intercooler upgrade or start hacking sh1t everywhere.

EHeye · 10-16-2003, 03:03 AM

yah looking over it again, you just get mad knock at 6k and above, everywhere else looks fine, so it does look like you are getting timing pulled due to knock count and heatsoak. Also in 3rd gear there try not to rev up to 6800rpm, shift at 6500rpm, where your timing is more aggressive.