Has anyone used knock PR adder before, need some help on this i've tried many different things to try and get rid of some knock. But it is acting very strange. Most times adding timing would get rid of knock but i've gone as far as i can go on all those settings.
Any info would be helpful!
6.1 hemi
All Forged internals
big cam
headers
modified heads
Attachment 120430Attachment 120431
Last edited by evildodge; 07-13-2022 at 09:01 AM.
Adding timing generally makes knock worse, not better.
Are your pistons 2618 or 4032 alloy?
Have you adjusted the knock sensor threshold yet? 2618 is generally "louder" than 4032 or stock and usually requires some adjustment to these tables
Well im trying to knock it down much as i can before i go that route, leaving it as a last resort and yes they are 2618
How much knock is normal for 2618 because i think 6 to 8 degrees isnt right im not going desensitize them that much
What's your Compression ratio ?
62 Biscayne 425/409 SS/D stock class car 10.60s
66 Dart 426CIG3 8.60@171 2750lbs Naturally asperated
04 Ram All Alum , 468Ci G3 10.50s @4800 lbs Naturally asperated
04 Rumble Bee, built 6.1 ,4000lbs 10.48 @ 129s MPH. Naturally asperated
05 Rumble Stock 5.7, 3.92s TUNE ONLY 13.94@98mph
9.5 to 1
looked at the 1st 4mins of the log, I'll watch the rest tonight, looked at the tune and the Timing is not out of ball park of where these like to run.Originally Posted by evildodge
if your using 93 oct or better, I doubt your getting knock unless your local elevation is 9k feet or higher, aftermarket pistons can wreak havoc on the KR sensors, especially if bore to piston ratio is on the lose side.
My 6.1 in my dart is 11.9 to 1 and has never seen better then 93oct, same with my 08 Magnum, both are using DSS 2-6556 +4cc, with a molnar 3.59 stroke crank and Manley rods , cam in the dart is Comp custom .755 intake and .710 exhaust duration is in the mid 250@50 (lifters and rocker gear are jesel) the maggy is in the low .600 I/E the Maggy had KR issues at 1st , I turned off knock sensors , it was the only way we could get it to not pull timing at WOT, which I'm only reaching a max of 24 @ 6krpm, any thing more then that it didn't make any more hp.
62 Biscayne 425/409 SS/D stock class car 10.60s
66 Dart 426CIG3 8.60@171 2750lbs Naturally asperated
04 Ram All Alum , 468Ci G3 10.50s @4800 lbs Naturally asperated
04 Rumble Bee, built 6.1 ,4000lbs 10.48 @ 129s MPH. Naturally asperated
05 Rumble Stock 5.7, 3.92s TUNE ONLY 13.94@98mph
I'll have to send you an updated log because that is an old one. these are dss dish style pistons in this build with 635 lift cam all forged loud shit but still. i should be able to get kr down to at least 4 degrees and i can just force the timing so i dont have to mess with the sensors. becasuse ive got most of it down to just wot pulls now seeing knock.
There is the lastest log so far i just posted.
Oh and as far as bore and piston haha these were so tight i broke a ring on one piston trying to get them in so i know i dont have any slapping going on with these 2618's
Last edited by evildodge; 07-13-2022 at 09:04 AM.
Reply With Quote