A bad misfire could also bend a rod. Make sure that ALL of the 3B ignition system is in A1 condition, and you shouldnt get any problems with misfires. BTDT.
boost comes, conrods go! 3B ignition?
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Tom C - www.rcmr.co.uk
Audi UR Quattro
Audi 100 C3 2.0 5 cyl 115ps
Audi S2 - 07k engine project aiming for 800ps
Audi B5 RS4 645ps 911nm -
That's why I wouldn't want to tune the old 3B too much without decent rods.
Is there any evidence of detonation on the pistons?SSComment
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It's hard to see traces of detonation on forged pistons, I have seen some US 20vt engines that had detonated pretty badly during their lives where no evidence of detonation could be seen on the pistons or the heads, yet they had pinged literally like church bells before, and I really mean audibly.
Just another thought. IMHO on 3Bs only detonation is responsible for bent rods, nothing else.
HTH,
Mihnea'98 Silver Grey 2.7T S4, dual 2.75" turbo back exhaust with no cats, FMIC, BIG injectors, 10 Bar motorsport fuel pump, modded RS4 turbos, tubular exhaust manifolds, custom intakes, RS4 MAF, Bilstein PSS9, H&R ARBs, 19" BBS CH, custom remap, 511 BHP/505ft-lbs
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