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Knocking issues

rlamas

rlamas

Well-Known Member
ok I'm starting to get knock for the first time after changing the injectors over to the 60s with matching chip i alco installed the hotwire kit

im reading anywhere between 802-826 on my O2's and 1.2-1.6 RD on my Scanmaster DontKnow:
 
rlamas said:
ok I'm starting to get knock for the first time after changing the injectors over to the 60s with matching chip i alco installed the hotwire kit

im reading anywhere between 802-826 on my O2's and 1.2-1.6 RD on my Scanmaster DontKnow:
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What speed are you seeing it? is that your o2's at wot?
 
Do you have any exhaust bumping into frame issues?

If it was me, I would try 100+ octane unleaded on a cooler evening and see what happens.
 
rlamas said:
That was off the line through 1-2 wot and and 3-4 at wot at about 75
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1-2 wot is likely false, 3-4 wot is likely real, did you get your blm's right? what is the boost at wot?, is alky working? if your not sure put some 110 oct. in and see what happen's, with 02's that high i doubt it's lean but check the FP off line vac for the hell of it... a elc. FP gauge is a wise investment, then you'll know if it's rising with boost 1:1
 
after changing the injectors I'm seeing 119-125 blms not the 116 i use to see constantly..boost is still set with the stock seliniod , what would give the car false knock 1st through 2nd?
 
I may have you confused with someone else as far as the alky goes, if you don't have it this is simple, put some 110 in and if it goes away you have two choice's, either run 110 mix or straight pump gas with the boost turned down to where you have no knock, of course you could always put alky on and have more fun for less$ than race gas
 
rlamas said:
after changing the injectors I'm seeing 119-125 blms not the 116 i use to see constantly..boost is still set with the stock seliniod , what would give the car false knock 1st through 2nd?
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Blm's are okay, put some 110 in to make sure it's false first, i thought Eric had knock ignore below 30 mph on his chips, which one you get?
 
rlamas said:
I got the street chip
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5.6 or 5.7 or alky or pump gas, what boost@ timing did it say? if you are running pump gas on fac. boost you will have knock unless you mix it with 110 or add alky, gas these days ain't what it used to be, fac. boost i think was 15-16 psi, you can bypass the fac. set-up with a vac. hose and bring it down to 10-12 psi...
 
i will do so with the timing .. a little 101 on advancing or pulling back timing how does that affect performance?
 
rlamas said:
i will do so with the timing .. a little 101 on advancing or pulling back timing how does that affect performance?
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For what you have i would keep it aroun 19-20 max, maybe less..one thing that will affect performance is blowed HG or hole's in the block....
 
Put race gas in it. If it doesn't go away you got problems......... My money is on bad gas and or to much boost, good job on watching the SM though.
 
I noticed the Downpipe is a hair away from the header I never noticed so close not sure if that could be an issue..didn't get any RD reading on the way home today it was a little cooler today O2's 836, RD 0.0 about 85mph
 
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