Dyno Run: How much Knock Retard will effect performance???
#1
Dyno Run: How much Knock Retard will effect performance???
Results: 320rwHP/331rwTQ
LT1/A4: Hotcam/CAI/Exhaust/Longtubes
While getting my car dyno'd I logged both runs.
Now each run at one point had knock retard of 0.7, so my spark advance fell from 42 to 37 degress when this happened.
I thought generally when this happens it will effect the engines power dramaticlly, but didn't see any spikes on the dyno graph.
So I was wondering if I'm losing any potential HP due to the spark retard?
And if this is actual knock, should I fix this by decreasing advance a few degrees in the areas needed(RPM 4200/MAP 100)?
Thanks.
LT1/A4: Hotcam/CAI/Exhaust/Longtubes
While getting my car dyno'd I logged both runs.
Now each run at one point had knock retard of 0.7, so my spark advance fell from 42 to 37 degress when this happened.
I thought generally when this happens it will effect the engines power dramaticlly, but didn't see any spikes on the dyno graph.
So I was wondering if I'm losing any potential HP due to the spark retard?
And if this is actual knock, should I fix this by decreasing advance a few degrees in the areas needed(RPM 4200/MAP 100)?
Thanks.
Last edited by ZPaul2Fresh8; 03-28-2004 at 05:58 PM.
#4
first if i was you i would try and use 100 octaine and see if the knock is still there. If if is then it is false knock. I ran that same setup for a while and 42 is a little high for 4200 and 100 kpa. try 40. That cam will make good increases in power till 6300 rpm and maybe higher but i would not go over 6300.
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