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<p>[QUOTE=&quot;Dr. Jeff Harper, post: 539042, member: 22311&quot;]<b>Update</b></p><p><br /></p><p>Two weeks ago I blew the head gasket at the # 1 cylinder.&nbsp; The 3JZ has higher compression than a 2JZ and, combined with a poor header design, caused too much cylinder pressure in that cylinder.&nbsp; So, I had a new, bigger, longer, and better made.&nbsp; I also adjusted the camshaft overlap to take out a little cylinder pressure as well. I took it to the race track last night (21/11/08) to see how it would run.</p><p><br /></p><p>Last night was a great testing session. I am really pleased with</p><p>my racer&#039;s performance.&nbsp; Before we went to the line for the first run</p><p>I told Mac that he would run a (total) et of 11.95.&nbsp; He ran an 11.98</p><p>total!&nbsp; On that run he launched at 2300 against the 2-step limiter,</p><p>shifted at 5000, and ran 0.9 bar of boost and ran an actual 10.91 with</p><p>an amazing 1.71 60-foot time.&nbsp; Amazing because of the low launch rpm.</p><p><br /></p><p>That&#039;s about as perfect a launch as you want a bracket racer to be --</p><p>quick with no tire spin -- so very repeatable and consistent.&nbsp; The new</p><p>header and waste gate arrangement seems to be working&nbsp; . . .&nbsp; the</p><p>sound is different (deeper) . . . it sounds &quot;freed-up&quot; . . . and</p><p>breathing better.&nbsp; Tonight we race.[/QUOTE]</p><p><br /></p>

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