Re: temp questions
No, I mean how did you decide that 37.5 degrees was the best amount? AFR heads do not need as much timing as a stock or lower performance head. Even most tests I've seen with Vortecs usually run 32-34.
Since it's so easy to dial back your timing, try knocking it down to 30 to see how it runs and then you can add some back if it feels like it'll take it.
Also if that rear port does not have a crossover to the other side your sensor is in fairly stagnant water so it's most likely going to read high. Especially since it's on the back side of the engine.
Dart 400-AFR 195-224/224 HR-Powerjection III TB with F.A.S.T. Sportsman XFI
TKO 600-Moser 3.42-Detroit Truetrac
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'69 Camaro Beater-SFT 327-M20-Moser 4.10-sold
'02 Z/28 vert-stock-sold and totaled