Highest spinning LT1
05-31-2007, 06:38 PM
#24
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I´m referting to the LT1 engine with ECM
I´m at 6800rpm now on street motor with the opti and ECM
The ECM stops at 7250,can it be reprogrammed to spin higher?Where is the limit?
I´m at 6800rpm now on street motor with the opti and ECM
The ECM stops at 7250,can it be reprogrammed to spin higher?Where is the limit?
05-31-2007, 07:51 PM
#25
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Mine 6900-7000
Ed's has a new 350 that he built that uses the opti and FAST system, it spins 8800 At the IHRA National this past weekend the rotor flew apart on him. This was a stock piece since then it was replaced with a stock piece and he pop rivet the rotor to keep it from flying apart. This has happened to me once so far on the stock piece.
The 350 made just a tad over 447 through a 6000 converter A3 TH350, stock TB, stock Heads, Stock Compression. He is running SS/JA class.
Ed's has a new 350 that he built that uses the opti and FAST system, it spins 8800 At the IHRA National this past weekend the rotor flew apart on him. This was a stock piece since then it was replaced with a stock piece and he pop rivet the rotor to keep it from flying apart. This has happened to me once so far on the stock piece.
The 350 made just a tad over 447 through a 6000 converter A3 TH350, stock TB, stock Heads, Stock Compression. He is running SS/JA class.
05-31-2007, 08:34 PM
#26
Originally Posted by Ari G
I´m referting to the LT1 engine with ECM
I´m at 6800rpm now on street motor with the opti and ECM
The ECM stops at 7250,can it be reprogrammed to spin higher?Where is the limit?
I´m at 6800rpm now on street motor with the opti and ECM
The ECM stops at 7250,can it be reprogrammed to spin higher?Where is the limit?
This is the one hard limit of this engine management system, no amount of reprogramming fixes it.
05-31-2007, 09:51 PM
#29
Mine old 383" been to 9000 once, 8800 a few times with the new F.A.S.T. ECM. The 350" has seen 8800 a few times. (Only has two passes on it, and a few dyno pulls.) A stock LT1 PCM won't go past 7200/7250. Doesn't matter what the tables go to. I hacked a cal with 9000 RPM tables, didn't matter. The injector drivers apear to be too slow as the PCM stops consistently triggering the injectors after about 7200. I have seen boxes that would not quite go 7000 with the same cal in them. I had one box (still do actually) that would go just past 7200 every time. It was in my car before the F.A.S.T. I guard it with my life. <G>
'87/'92 TBI pickup trucks only have 3600 rpm tables,and go well past 5000. Only thing the tables ending at a given RPM is that you can't make tuning changes after that RPM. '96/'2000 Vortec trucks have 6000 RPM spark tables and 6400 RPM P.E. fuel tables, but won't rev past 5400/5500. It's not the RPM where the tables stop. Wish it were that simple.
'87/'92 TBI pickup trucks only have 3600 rpm tables,and go well past 5000. Only thing the tables ending at a given RPM is that you can't make tuning changes after that RPM. '96/'2000 Vortec trucks have 6000 RPM spark tables and 6400 RPM P.E. fuel tables, but won't rev past 5400/5500. It's not the RPM where the tables stop. Wish it were that simple.
05-31-2007, 10:20 PM
#30
Originally Posted by Ed Wright
Mine old 383" been to 9000 once, 8800 a few times with the new F.A.S.T. ECM. The 350" has seen 8800 a few times. (Only has two passes on it, and a few dyno pulls.) A stock LT1 PCM won't go past 7200/7250. Doesn't matter what the tables go to. I hacked a cal with 9000 RPM tables, didn't matter. The injector drivers apear to be too slow as the PCM stops consistently triggering the injectors after about 7200. I have seen boxes that would not quite go 7000 with the same cal in them. I had one box (still do actually) that would go just past 7200 every time. It was in my car before the F.A.S.T. I guard it with my life. <G>
'87/'92 TBI pickup trucks only have 3600 rpm tables,and go well past 5000. Only thing the tables ending at a given RPM is that you can't make tuning changes after that RPM. '96/'2000 Vortec trucks have 6000 RPM spark tables and 6400 RPM P.E. fuel tables, but won't rev past 5400/5500. It's not the RPM where the tables stop. Wish it were that simple.
'87/'92 TBI pickup trucks only have 3600 rpm tables,and go well past 5000. Only thing the tables ending at a given RPM is that you can't make tuning changes after that RPM. '96/'2000 Vortec trucks have 6000 RPM spark tables and 6400 RPM P.E. fuel tables, but won't rev past 5400/5500. It's not the RPM where the tables stop. Wish it were that simple.
Ed, I want that"special" ecm
David
