Went datalogging

[Hairdo]

Took the car out at 0300 and did some datalogging for the first time:

DCR 2.4
Crower S2 cams
AGP GT3076R
Shell V-Power 91
22psig boost


as it turns out, It's running ~9.5 degrees of timing across the board at WOT, seems a bit low to me.

Anyways, here is a log file from tonight:

http://collins.torchedinduction.com/Logs/1.stf

Comments/Suggestions welcome and appreciated!

[nutz]

check your o2 fb target you are pulling -10% across the boosted area (looks like its hunting for 12.5) and you are getting some bad knock

didnt get a chance to really look at it close

[never2muchboost]

stop pulling on that thing and find out why you are knocking bad... before you are picking your rod caps off the floor....if they are not loose already

[never2muchboost]

jesus christ..i just realized you are reading in kpa no wonder you are knocking you hit 36 psi at one point..youre gonna kill that thing!

[Hairdo]

Quote: Originally Posted by never2muchboost

jesus christ..i just realized you are reading in kpa no wonder you are knocking you hit 36 psi at one point..youre gonna kill that thing!

Forgive my newbiness, but isn't the engine load axis an absolute pressure?

233 KPa = 33.7 psi, the density altitude was around 5000 feet when I was doing this so that seems right about in line with what the absolute pressure would be with 22 or so #'s of boost.

I don't know if it's pullling any timing up top as the timing table actually shows ~ 9.5 degrees at that amount of engine load. That spike of
2.5V on the knock sensor scares the bejesus outta me though!

Looking at the O2 feedback table, it is set to 12.5 across the board. Good observation, I think I'll remedy that right away!

Is it ever advisable to run with O2 feedback control disabled?


Thank you for input!

[nutz]

2.5v knock is serious

I didnt do the conversion but 36psi !!!!!!!!
and our sensors read manifold pressure psig not psia (manifold +atm.)

36 psi and 12 a/f is pretty ballsy even for 116 but on 91 pump is insane, start tuning the A/F first I find max safe power is around 11.3-11.7

[Hairdo]

I don't know how it could possibly be 36psi, honestly. Is there any way that mine could be set to read in absolute pressure? I'm pretty sure that 36psi gauge on pump gas would produce audible knock and or catastrophic failure.

The boost gauge holds 22psi, and that corresponds with ~240KPa + low atmospheric pressure.

I'll post up my working cal in the appropriate section for anyone who is interested!

[nutz]

Quote: Originally Posted by Hairdo

I don't know how it could possibly be 36psi, honestly. Is there any way that mine could be set to read in absolute pressure? I'm pretty sure that 36psi gauge on pump gas would produce audible knock and or catastrophic failure.

The boost gauge holds 22psi, and that corresponds with ~240KPa + low atmospheric pressure.

I'll post up my working cal in the appropriate section for anyone who is interested!

your right i just looked at a map

did ya get the o2 fb table set up

[Hairdo]

no, I haven't touched it.

I can't drive the car now, coolant feed line is leaking real bad, and the fix-it store is closed

[nutz]

Quote: Originally Posted by Hairdo

no, I haven't touched it.

I can't drive the car now, coolant feed line is leaking real bad, and the fix-it store is closed

and danmmm your KPH up there i was like holly shit he was going fast

[Hairdo]

Quote: Originally Posted by nutz

and danmmm your KPH up there i was like holly shit he was going fast

On a positive note, I have an awesome testing road 30 seconds from my home!

straight, tons of visibility, smooth pavement, no ugly obstacles.


nowhere for the lawman to hide with his laser!

[never2muchboost]