I can tell you exactly in the code where the rev limiter is... At c3af the value should be ff..... this should be the fuel shutoff point 255x1 =255mph C3b0 should be 62..or x=655368120/(ex numb cyl) Or 10 031rpm The restore rmph is at c3b2 value fe=254 or 254mph Restore rpm is at c3b3 value 67 or 103 so 65536*120/(103*8)= 9544rpm Mike Rolica Plant A, Magnesium Products Division Strathroy (519)-245-4040 Ext. 265 -----Original Message----- From: Roger Heflin [SMTP:rah@horizon.hit.net] Sent: Tuesday, June 06, 2000 2:17 PM To: gmecm@diy-efi.org Subject: Re: Rev Limiter on '87 Corvette On Tue, 6 Jun 2000, Jeremy Gonyou wrote: > I was kinda thinking the same thing about my car. (the revving part not the > new motor part). I was going to modify the speed limiter section to include > a rev limiter by throwing in a extra branch statement. > > Well, Pontiac says a rev limiter kicks in at 6200 rpm...I haven't found it > yet, and when I tried, I found my tach needle on the wrong side of the > little peg. > I don't know about the 87 specifically. On my 93 LT1 f-body the rev limiter is using something called "reference time" which roughly seems to translate to 1/4 of the time for a revolution. This value is what the data value in the chip was compared against. The reference time was also included in my cars standard data stream. This is also the value that RPM is figured from. I suspect that there is something similar on the 87 also, so look at where rpm comes from and then see what is using that. Roger ---------------------------------------------------------------------------- To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes) in the body of a message (not the subject) to majordomo@lists.diy-efi.org
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