C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

Is the Knock Sensor Absolutely Required?

Thread Tools
 
Search this Thread
 
Old Dec 31, 2014 | 04:50 PM
  #1  
AFTRBRNR's Avatar
AFTRBRNR
Thread Starter
Pro
10 Year Member
 
Joined: Mar 2007
Posts: 600
Likes: 11
From: Wilmington NC
Default Is the Knock Sensor Absolutely Required?

Installing a little more robust starter in my car, the knock sensor got wiped out. Not the sensor itself, the part that clips onto it got destroyed because of lack of clearance.

Question: Can I tune this out and go without the sensor? This would make my life so much easier.
Reply
Old Dec 31, 2014 | 05:32 PM
  #2  
lbzraptor's Avatar
lbzraptor
Drifting
10 Year Member
All Eyes On Me
Liked
Loved
 
Joined: Oct 2013
Posts: 1,577
Likes: 121
Default

Originally Posted by AFTRBRNR
Installing a little more robust starter in my car, the knock sensor got wiped out. Not the sensor itself, the part that clips onto it got destroyed because of lack of clearance.

Question: Can I tune this out and go without the sensor? This would make my life so much easier.
I think it is there to protect the engine from lean conditions which could damage the motor.
Reply
Old Dec 31, 2014 | 05:33 PM
  #3  
blown81bu's Avatar
blown81bu
Safety Car
10 Year Member
 
Joined: Aug 2007
Posts: 3,562
Likes: 233
Default

yes u can i have no knock sensors ..no more codes either once u shut them off using efi live or hp tuners

along with no maf or air pump

but if u run into bad gas u could be in trouble cause they bump timing back when detonation becomes present so i dont recomend getting rid of them

Last edited by blown81bu; Dec 31, 2014 at 05:36 PM.
Reply
Old Dec 31, 2014 | 05:57 PM
  #4  
AFTRBRNR's Avatar
AFTRBRNR
Thread Starter
Pro
10 Year Member
 
Joined: Mar 2007
Posts: 600
Likes: 11
From: Wilmington NC
Default

Originally Posted by blown81bu
yes u can i have no knock sensors ..no more codes either once u shut them off using efi live or hp tuners

along with no maf or air pump

but if u run into bad gas u could be in trouble cause they bump timing back when detonation becomes present so i dont recomend getting rid of them
In my tune file my knock retard has been 0 for years. She runs rich if anything. I'm guessing based off of that... it's the same as not even using the sensor?
Reply
Old Dec 31, 2014 | 06:37 PM
  #5  
lionelhutz's Avatar
lionelhutz
Race Director
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2007
Posts: 11,150
Likes: 890
From: South Western Ontario
Default

Yup, if you've set the knock retard tables to 0* then it's already the same as not having one so turn-off the codes and it's gone. I did the same on a LT1 because it showed knock all the time after some engine and valvetrain upgrades.
Reply
Old Jan 1, 2015 | 08:29 AM
  #6  
dadaroo's Avatar
dadaroo
Le Mans Master
 
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
Default

Originally Posted by AFTRBRNR
Installing a little more robust starter in my car, the knock sensor got wiped out.
OK, I'll bite. How do you damage a Knock Sensor when putting in another starter?
Reply
Old Jan 1, 2015 | 09:24 AM
  #7  
bjones7131's Avatar
bjones7131
Safety Car
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2014
Posts: 4,496
Likes: 856
From: Walhalla South Carolina
Default

I'll bite too, what in the world is a knock sensor and where is it and what is its function?
Reply
Old Jan 1, 2015 | 09:42 AM
  #8  
dadaroo's Avatar
dadaroo
Le Mans Master
 
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
Default

There are 2 and they are located under the intake manifold. They detect cylinder detonation or "ping" that maybe you have heard of before. In the old days if you ran fuel without adequate octane you would get pinging which is more of an explosion in the cylinder rather than a clean fuel burn flame front. It can break pistons and more. In the old days you just had to run better gas or retard the timing to prevent it. Newer cars like the C5 have sensors which can detect it and automatically retard the timing to prevent it. Hope that helps.

The starter is not under the manifold in my car. That is why I asked the question. I am sure he can explain what he meant. Not really a big deal to me, just felt like starting the new year with some fun.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-1

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-2

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-3

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-4

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-5

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-6

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-7

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-8

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-9

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
Old Jan 1, 2015 | 11:47 AM
  #9  
bjones7131's Avatar
bjones7131
Safety Car
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2014
Posts: 4,496
Likes: 856
From: Walhalla South Carolina
Default

Thanks, i thought as much. We used to call it spark knock in my older days. Thanks for the explaination
Reply
Old Jan 1, 2015 | 07:32 PM
  #10  
AFTRBRNR's Avatar
AFTRBRNR
Thread Starter
Pro
10 Year Member
 
Joined: Mar 2007
Posts: 600
Likes: 11
From: Wilmington NC
Default

The new starter is longer than the factory starter. When I torqued in the bolt on the starter, it cleaved the connection of the knock sensor. On my engine, the sensor is located adjacent to the starter on the passenger side.

We have two sensors, on each side of the engine. I will still have one good sensor but will be deleting the one that got destroyed. However, my new starter should fit beautifully now that I removed the sensor... now I'm hoping I can get the long tubes on over it then I'm gold!!
Reply
Old Jan 2, 2015 | 07:42 AM
  #11  
dadaroo's Avatar
dadaroo
Le Mans Master
 
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
Default

Originally Posted by AFTRBRNR
The new starter is longer than the factory starter. When I torqued in the bolt on the starter, it cleaved the connection of the knock sensor. On my engine, the sensor is located adjacent to the starter on the passenger side.

We have two sensors, on each side of the engine. I will still have one good sensor but will be deleting the one that got destroyed. However, my new starter should fit beautifully now that I removed the sensor... now I'm hoping I can get the long tubes on over it then I'm gold!!
Thanks for the explanation. What engine and year do you have?
Reply
Old Jan 2, 2015 | 12:01 PM
  #12  
AFTRBRNR's Avatar
AFTRBRNR
Thread Starter
Pro
10 Year Member
 
Joined: Mar 2007
Posts: 600
Likes: 11
From: Wilmington NC
Default

I have a LS2 from a 2006 C6. I bought it with 5,000 miles on it.
Reply
Old Jan 2, 2015 | 12:10 PM
  #13  
RedZMonte's Avatar
RedZMonte
Burning Brakes
15 Year Member
 
Joined: Dec 2003
Posts: 1,243
Likes: 5
From: Loveland CO
Default

LS1/6 motors are in the intake valley and the LS2/3/7 have them on the sides of the block. if you have your sensors basically turned off then they are just plugging holes at this point.

So your knock sensor is here. jsut to show everyone what the LS2 has
LS2/LS3


LS1 harness with LS3 motor





S

Last edited by RedZMonte; Jan 2, 2015 at 12:19 PM.
Reply
Old Jan 2, 2015 | 02:43 PM
  #14  
AFTRBRNR's Avatar
AFTRBRNR
Thread Starter
Pro
10 Year Member
 
Joined: Mar 2007
Posts: 600
Likes: 11
From: Wilmington NC
Default

Hey Red, in hind sight I remembered that I pulled the plug out and installed everything back on the car. I don't actually recall the hole left by the knock sensor actually going through the block. Am I correct and is it ok to leave it like that?
Reply
Old Jan 5, 2015 | 09:49 AM
  #15  
AFTRBRNR's Avatar
AFTRBRNR
Thread Starter
Pro
10 Year Member
 
Joined: Mar 2007
Posts: 600
Likes: 11
From: Wilmington NC
Default

And then I realized that I have a LS2 engine with LS1 computer and the knock sensors are not recognized anyway.
Reply

Get notified of new replies

To Is the Knock Sensor Absolutely Required?





All times are GMT -4. The time now is 04:11 PM.

story-0
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-1
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-2
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-3
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-4
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-5
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-6
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-7
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-8
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-9
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE