Among the many things that I have been working on to ad to the site is going through and scanning all of the old letters, bulletins, engineering info, etc. That I have accumulated over the years as part of my research. As I scan them and reread or in some cases read for the first time some of the items I have I will occasionally come ascross something that will surpirse me. Not sure how long I have had this letter but it is of great interest to those that are interested in the Z28 no matter what year you have. It is a Chevrolet Inter Organization letter dated June 6th of 1967 detailing the service pack Camaro Z28 engine. Those of us that follow the Z28 are more than familiar with the 302 wether it is in a 67, 68 or 1969 Z and nobody ever believed that the rated 290hp was even close to the actual potential output. This letter, can be seen here (http://www.chevroletcamaros.com/pages/gmpaperwork/internalpapers/z28memojune567pg1.html) would seem to confirm that fact.
According to the letter the 302 was capable of a maximum of 448hp (Under perfect conditions) at 7400rpm. A high reving number but anyone who has ever raced a Z knows that they were pushed into that range. The actual horse power according to the letter in vehicle trim would be more along the lines of 403hp but even at that number it is a staggering difference over the advertised 290bhp. Does anyone have any old track infomration on a car similarly equiped to this with ET’s?
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