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Check my specs below. I regularly run 1 bar at track. Not always, but often - as required (EBC).
I have had no mechanical breaks. No broken rings/studs etc. I run AFRs as high as 12.5. Sometimes more - but I would prefer no more than 12.5. I am still struggling to get enough fuel at 6000rpm.
I ran 1 bar with the stock IC - but sprayed water over it - same reasons as you state. I don't want to destroy the motor. Most of what I do to it is to try and preserve it. I have upgraded to 964 IC. For performance and longevity. But these engines are tough and 1 bar is no issue as long as you are sensible. I used to worry about EGT - the dial was always pegged. So I disconnected it. ARP rod bolts would be useful, but not essential (I am still running stock). I think they are more important for high revs rather than boost, and I limit my revs.
Regards
Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-)
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