vrmilionzx Posted March 14 Share Posted March 14 Fairly new to S30 life, so my apologies for any gaps in my knowledge; I've been lurking for awhile now to get up to speed. Recently picked up some 87mm ITM pistons for a rebuild for my '74 260. F54 block, N47 head (assuming the machine shop blesses it), with the right HG I will be targeting about 9.5:1 compression. Nothing too crazy, keeping it N/A and making some small tweaks for efficiency and fun, not going to break 200 hp. It's going to be a weekend and occasional road trip car - goals are a reliable, fun street build that MIGHT occasionally see a track day (but I wouldn't count on it). I've seen a host of older posts about ITM rings not being great, and Total Seal was recommended. The thing is, both Total Seal and ITM (based on the limited info I've been able to track down) seem to have iron rings. The ITM rings have some shiny coating (chromoly?) on the (outer) faces. So, since all of the posts I've found about ITM rings being 'not great' and suggestions to get Total Seal instead are in the 10+ year old category, I'm wondering if anyone has any recent experience or can make recommendations either between these two, or for a third option for good reliable rings. Quote Link to comment Share on other sites More sharing options...
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