DIY PROM Do It Yourself PROM chip burning help. No PROM begging. No PROMs for sale. No commercial exchange. Not a referral service.

knocking make sense?

Thread Tools
 
Search this Thread
 
Old May 28, 2005 | 01:30 PM
  #1  
2new2funny's Avatar
Thread Starter
Member
 
Joined: Mar 2004
Posts: 165
Likes: 0
knocking make sense?

L98, MAF
zz4 cam
6* initial timing
TPS 1.55, MAF 67.83 g/s
arap advance curve

I did some datalogging and found 5 degrees retard on an acceleration burst at 2000 rpm while both integrator and blms showed 128 and load was 161.

According to the table, spark was exactly where it should have been at just over 32 degrees.
Why the knock and subsequent retard?

Is the solution to modify the advance table or to add fuel?
If I were to add fuel, wouldn't it then be rich?
Comments?

Oh! Why doesn't the tps match the maf table value at that point? (Should be 26 g/s in Table 2)
Reply
Old May 29, 2005 | 01:03 AM
  #2  
327_TPI_77_Maro's Avatar
Supreme Member
iTrader: (8)
 
Joined: Sep 2004
Posts: 1,896
Likes: 0
From: Charles County, Maryland
Car: 2000 BMW M5
Oh! Why doesn't the tps match the maf table value at that point? (Should be 26 g/s in Table 2)
Um, No? The voltages you see in the MAF tables are MAF SENSOR voltage, NOT TPS voltage.
Reply
Old May 29, 2005 | 08:05 AM
  #3  
Grumpy's Avatar
Supreme Member
 
Joined: Jun 2000
Posts: 7,554
Likes: 1
From: In reality
Car: An Ol Buick
Engine: Vsick
Transmission: Janis Tranny Yank Converter
Re: knocking make sense?

Originally posted by 2new2funny

I did some datalogging and found 5 degrees retard on an acceleration burst at 2000 rpm while both integrator and blms showed 128 and load was 161.
Take some timing out first. The ARAP uses more then is typically needed.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
RazorN8
Tech / General Engine
4
Jan 7, 2022 11:44 AM
db057
Tech / General Engine
4
Aug 22, 2015 08:17 PM
86IROC112
Tech / General Engine
3
Aug 17, 2015 07:57 PM
MustangEater82
Brakes
0
Aug 11, 2015 07:52 AM
gwade12
Tech / General Engine
1
Aug 8, 2015 08:17 AM




All times are GMT -5. The time now is 08:24 AM.