C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Bump up engine timing?

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Old Apr 3, 2004 | 08:23 PM
  #21  
snowball247's Avatar
snowball247
Intermediate
 
Joined: Mar 2004
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From: montgomery city mo
Default Re: Bump up engine timing? (ENGINE TROOP)

for me anyway i cant feel from a couple degres to the next its just track g-tech or dyno numbers hard data.by the way just got mine 383 in tinkered with timeing by ear and im glad i didnt run it had 25advance :banghead:
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Old Apr 3, 2004 | 08:52 PM
  #22  
CFI-EFI's Avatar
CFI-EFI
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From: The Top of Utah
Default Re: Bump up engine timing? (oldace84)

Why?
:smash: :smash:
Think about it's NAME. It is a knock SENSOR. It is not a knock anticipator. It hears nothing, it does nothing.
speak up guys, can you feel the timing being pulled or do you need to hook into the knock sensor?
I don't know if you will feel it or not. Mine has never worked properly. BUT... The ESC and the ECM team up and over compensate. It pulls more spark than it has to and keeps it retarded (slow?) longer than it has to. Performance wise, it does not pay to activate the knock sensor. If you keep advancing until the 1/4 mile mphs (a horsepower indicator) start to drop off, you'll have it.

RACE ON!!!
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Old Apr 4, 2004 | 04:43 AM
  #23  
CentralCoaster's Avatar
CentralCoaster
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Joined: May 2002
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Default Re: Bump up engine timing? (CFI-EFI)

It hears nothing, it does nothing.
Hey, it's just like Tony! Does that mean he's a knock sensor too?
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Old Apr 4, 2004 | 07:16 PM
  #24  
BIG JIM 54's Avatar
BIG JIM 54
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From: Costa Mesa CA
Default Re: Bump up engine timing? (ir0nmaiden420)

Well....

As it is right now, I can't even run the stock 6 degrees initial without hitting off the knock sensor. I think I'm a bit lean yet and need to bump up my fuel pressure. A lean mixture is more prone to detonation. It only knocks for a moment just before a 5000+ RPM shift. But it still bugs me.
Since the knock sensor works immediately upon hearing knock and since a tiny bit of knock once-in-awhile probably won't hurt a street engine, IMO, I believe the knock sensor is a good safe-guard.

When my engine was stock, I liked 8 degrees.

One more thing. Sometimes the knock is inaudible and only a scanner or ALDL/PC interface with the accompanying software can detect it (I bought mine off EBay). Just because you don't hear a knock doesn't necessarily mean it's not there.

BIG JIM


[Modified by BIG JIM 54, 4:24 PM 4/4/2004]
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Old Apr 5, 2004 | 09:47 AM
  #25  
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VAHROOM
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From: Chandler AZ
Default Re: Bump up engine timing? (BIG JIM 54)


One more thing. Sometimes the knock is inaudible and only a scanner or ALDL/PC interface with the accompanying software can detect it (I bought mine off EBay). Just because you don't hear a knock doesn't necessarily mean it's not there.
One more thing. Just because the sensor perceives a knock doesn't mean one is there. Sometimes loud exhaust, a loose bracket, a vibration etc. will make it think there is a knock. I believe a dyno, chasis or rolling is the best indicator. along with common sense that is.


[Modified by VAHROOM, 7:47 AM 4/5/2004]
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