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VR V-8 SS

Deuce

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Does it take a few starts to relearn tps and iac positions?
I adjusted tps another mm or 2. And also backed off idle screw 1/4 turn. But haven't checked IAC steps while hot yet.
It stalled in traffic at cold idle a few times this morning.
 

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Cancel that: IAC constantly adjusts. I got home and plugged car in, I found I had screwed wrong way and was at 130steps. So adjusted back, shut off, restarted - repeat a 1/2 doz times and got it sitting around 19-21 steps IAC hot idle.

Car sounded awesome at 500rpm idle, but really not practical.
It is now around 750rpm hot.
 
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Deuce

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Pulled 8 plugs today, re-gapped them to around 1mm. They all look okay.
IMG_20200510_102820.jpg

So back in they go.

Genuine AC delco plugs if anyone is wondering.
 

delcowizzid

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Can see the come distribution issues clear as day on the plugs some have the timing perfect heat mark on the earth strap in the middle of the bend the others have far to much timing at hot all the way past the weld holding the earth strap on. Run the wide open fueling richer than normal to keep those 4 inline and the other 3 or 4 cylinders will just have to run too rich
 

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Cheers mate,
How much richer would you like? 12:1?
11:1? Surely no more than that.

From memory WOT max torque is pig rich 8:1 at the moment and needs fuel pulled.
 

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There is a lean spot at WOT after a rich spot. We'll get that sorted when I can come down your way.
 

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Hard to say how rich it would need to go on the wideband reading all the cylinders to average out the rich and lean cylinders mid 12s is a good start the difference from 12.5 to 13 is only like 5hp. I would put the wideband in the side that has the most number of lean plugs and go off that reading and tune that side to 12.4 12.5 but it's hard to make power with 8 holes all making different hp fighting each other haha
 

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There is a lean spot at WOT after a rich spot. We'll get that sorted when I can come down your way.
What do you think the delay is between rpm hit and W/B read with current O2 placement?
Could it be a few 100rpm late and we have adjusted afr at the wrong rpm?
Or coincidental.
Asking because this is what I did with my bike when reading afr up the tail pipe years back.
 
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