Tech guys, most common knock retard causes??
Thread Starter
Teching In
Joined: Dec 2001
Posts: 24
Likes: 0
From: NW Indiana
Tech guys, most common knock retard causes?? Just wondering what some of the more common causes of knock retard are. I have seen posts about the ASP UD pulleys causing it and headers. But I was just wondering if you had come across any other "common" LS1 areas.
Staging Lane
Joined: Mar 2004
Posts: 79
Likes: 0
Anyone else that's had KR and found a way to fix it?
I just had heads and cam done and I have the dreaded KR according to the data logs. I too have an ASP pulley. But arent there a ton of folks running that piece no prob?
I was getting KR both with the exhaust going through the catback and when the cutout is open. I've had the headers on for quite a while and I've never felt any banging at all.
Any suggestions/ comments?
I just had heads and cam done and I have the dreaded KR according to the data logs. I too have an ASP pulley. But arent there a ton of folks running that piece no prob?
I was getting KR both with the exhaust going through the catback and when the cutout is open. I've had the headers on for quite a while and I've never felt any banging at all.
Any suggestions/ comments?
Staging Lane
Joined: Mar 2004
Posts: 79
Likes: 0
Originally Posted by HumpinSS
Try some high octane gas to rule out the posibility of it being real detonation
Red SS Barchetta..... I apologize... I'm not trying to hijack your thread but when I read what you wrote, it's an answer Im looking for too
TECH Addict
Joined: Oct 2003
Posts: 2,620
Likes: 0
From: Central, MA
I hear octane booster stuff only raises octane about half a point...
I consistantly get around 2* KR when I roll into the throttle in OD, at about 65-70.
I've got as high as 9* of KR in some occasions. I don't know how to duplicate it.
It drives me crazy... I have no idea how to get rid of it. I run nothing but 93 octane.
I consistantly get around 2* KR when I roll into the throttle in OD, at about 65-70.
I've got as high as 9* of KR in some occasions. I don't know how to duplicate it.
It drives me crazy... I have no idea how to get rid of it. I run nothing but 93 octane.
Trending Topics
Staging Lane
Joined: Mar 2004
Posts: 79
Likes: 0
Originally Posted by marc_w
I hear octane booster stuff only raises octane about half a point...
I consistantly get around 2* KR when I roll into the throttle in OD, at about 65-70.
I've got as high as 9* of KR in some occasions. I don't know how to duplicate it.
It drives me crazy... I have no idea how to get rid of it. I run nothing but 93 octane.
I consistantly get around 2* KR when I roll into the throttle in OD, at about 65-70.
I've got as high as 9* of KR in some occasions. I don't know how to duplicate it.
It drives me crazy... I have no idea how to get rid of it. I run nothing but 93 octane.
Next step... put in some race gas and log some data....
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo Thread Starter
Teching In
Joined: Dec 2001
Posts: 24
Likes: 0
From: NW Indiana
I have yet to try high octane gas, but I figured maybe some of the tech guys might have ran across some more common issues. I had mine dyno tuned at LS1speed and am only putting down 360rwhp - with MAJOR KR. Tuner felt it was a possible bent valve(s) - I had some problems with a set of PP S2 heads with the old springs on them.
I sahould be around 420.........................
I sahould be around 420.........................
