Datalog/knock count
#1
Supreme Member
Thread Starter
Join Date: Aug 2003
Location: Long Island New York
Posts: 1,644
Likes: 0
Received 3 Likes
on
3 Posts
Car: 89 Formula 350
Engine: Forged 385 H/C/I
Transmission: 700R4-4300 Stall-lockup
Axle/Gears: BW 9 Bolt 3:70
Datalog/knock count
just wondering if the knock sensor will pickup an exaust rattle from the collector area? I did a WOT log and had a knock count of 17 and car was pulling 2 degrees timing.. After the pass I could feel and hear the exaust rattle
#2
Moderator
Re: Datalog/knock count
Yes it will. In my experience it did at least.
#3
Supreme Member
Thread Starter
Join Date: Aug 2003
Location: Long Island New York
Posts: 1,644
Likes: 0
Received 3 Likes
on
3 Posts
Car: 89 Formula 350
Engine: Forged 385 H/C/I
Transmission: 700R4-4300 Stall-lockup
Axle/Gears: BW 9 Bolt 3:70
Re: Datalog/knock count
just did two more datalogs...I had no knock counts at idle but 8 knock counts and pulled 3* degrees when I shut the engine down. The other log had 11 KCs and 2.50 KR that all came in just after turning engine off 0 RPMs...
#4
Supreme Member
Join Date: Oct 2002
Location: Idaho
Posts: 1,096
Likes: 0
Received 0 Likes
on
0 Posts
Re: Datalog/knock count
My experiance with Knock Counter would be YES! It is built to try and find just real knock counts but falls short.
Even the GM manual say if there is a intermittent/glitch. thought of failure to hit the block with a hammer. So that says they even know it will pick up other noises.
Even the GM manual say if there is a intermittent/glitch. thought of failure to hit the block with a hammer. So that says they even know it will pick up other noises.
#6
Supreme Member
Join Date: Oct 2002
Location: Idaho
Posts: 1,096
Likes: 0
Received 0 Likes
on
0 Posts
Re: Datalog/knock count
Do you know anywhere, where knock sensors sensitivity or frequency is documented. The differance scould really help guys with certain engine mods or conversions.
Trending Topics
#8
Supreme Member
Join Date: Oct 2002
Location: Idaho
Posts: 1,096
Likes: 0
Received 0 Likes
on
0 Posts
Re: Datalog/knock count
Not sure? But some guys on here recomend an elbow on Knock Sensor... from what I have read in GM service stuff the sensor itself needs or is designed to be in water port, so it gets it reading of knock through coolant.
#9
Supreme Member
Thread Starter
Join Date: Aug 2003
Location: Long Island New York
Posts: 1,644
Likes: 0
Received 3 Likes
on
3 Posts
Car: 89 Formula 350
Engine: Forged 385 H/C/I
Transmission: 700R4-4300 Stall-lockup
Axle/Gears: BW 9 Bolt 3:70
Re: Datalog/knock count
so I took the car in today and had all the rattles fixed. I did a few logs since and I'm still getting knock counts and timing retard. I had 21 KCs at WOT with 3* KR. Thats with only 29* total timing and 12.5 AF at WOT. I also am getting between 7 and 12 KCs every timing I shut the car off, is that normal? So I checked my accesories and they are not rattling and exhaust seems good so WTF? Engine is 11:1 so I think the 93 octane I run should be ok? Any ideas?? Thanks..
#10
Moderator
iTrader: (1)
Join Date: Mar 2002
Location: Chasing Electrons
Posts: 18,401
Likes: 0
Received 215 Likes
on
201 Posts
Car: check
Engine: check
Transmission: check
Re: Datalog/knock count
so I took the car in today and had all the rattles fixed. I did a few logs since and I'm still getting knock counts and timing retard. I had 21 KCs at WOT with 3* KR. Thats with only 29* total timing and 12.5 AF at WOT. I also am getting between 7 and 12 KCs every timing I shut the car off, is that normal? So I checked my accesories and they are not rattling and exhaust seems good so WTF? Engine is 11:1 so I think the 93 octane I run should be ok? Any ideas?? Thanks..
Pull some plugs and check them for signs of detonation. Little black pepper flecks on the center porcelain. If present then so is real knock.
RBob.
#11
Supreme Member
Thread Starter
Join Date: Aug 2003
Location: Long Island New York
Posts: 1,644
Likes: 0
Received 3 Likes
on
3 Posts
Car: 89 Formula 350
Engine: Forged 385 H/C/I
Transmission: 700R4-4300 Stall-lockup
Axle/Gears: BW 9 Bolt 3:70
Re: Datalog/knock count
The wot log from today had a few knocks at heavy part throttle and like 21 knocks at WOT from 1 st gear into second, with 3.40* knock retard. Just to make sure my understanding is correct. Total spark is in Tuner Pro(Spark Advance Table)+(Power Enrichment Mode Spark Advance)?? If so in the PEMSA i'm 4.92 at 2000 and 3200 and 5.98 4800. Then that added to the main spark table in row 208 @ 2000-3200rpms 20 to 22.15 making a total of 25-27* and 22-23.20(main table) from 3200-4800+ PEMSA 4.92-5.98 making the total timing in row 208(WOT?) 29*?? Way lower then the 36* total timing the engine was dyno broken in on out of the car. Also I see in the main spark table in rows 32 through 128 the 1800-4000rpm range the spark advance is 34*-29.88*, that plus the 4.92 of the PE mode spark advance would have my total spark between 39* and 34*? That 39* looks high to me if I'm figuring this out correctly. The AF looked good at WOT 12.5-13.2, I'm attaching the BIN...thanks for any ideas
#12
Supreme Member
iTrader: (1)
Join Date: Apr 2004
Location: Browns Town
Posts: 3,178
Likes: 0
Received 3 Likes
on
3 Posts
Car: 86 Monte SS (730,$8D,G3,AP,4K,S_V4)
Engine: 406 Hyd Roller 236/242
Transmission: 700R4 HomeBrew, 2.4K stall
Axle/Gears: 3:73 Posi, 7.5 Soon to break
Re: Datalog/knock count
There is a load Vs Coolant modifier table at 10F->17A also.
It is named "Spark Correction - LV8 vs. Coolant Temp" in "Expanded 6E" XDF definition.
I see a selection bit to choose "LV8 or "alternate" .
Not sure what the purpose there is, looks to use a different scale.
Maybe someone could correctly clarify how that works.
It is named "Spark Correction - LV8 vs. Coolant Temp" in "Expanded 6E" XDF definition.
I see a selection bit to choose "LV8 or "alternate" .
Not sure what the purpose there is, looks to use a different scale.
Maybe someone could correctly clarify how that works.
Thread
Thread Starter
Forum
Replies
Last Post
Eric2ndGen
Problems / Help / Suggestions / Comments
1
08-31-2015 11:30 AM