help with Hypertech Shift points and rev limiter
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help with Hypertech Shift points and rev limiter
I have a 2000 F150 Supercab with the 4.6L and I just purchased a hypertech programmer and it has the option of changing the rev limiter and shift points. I believe my truck stays in first gear too long before it changes. I do not know much about this and was wondering if anyone has delt with this before and could tell me what would be best for my truck for maximum acceleration. I would appreciate any help.
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Joined: Mar 1998
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From: Virginia
Hi Branmw,
I'll go over something here just briefly with you, then for more info & proper Tech Support you'll want to contact Hypertech directly, or call your vendor..............
It's perfectly normal to have it stay in 1st gear longer with a "performance" tune - from the factory, these vehicles (and most others, too) upshift too soon for best performance & driveability. So if you are worried about seeing 5200+ rpm on the tach when you do a heavy-throttle 1-2 upshift, don't be - that's perfectly OK, up to about 5400 rpm or so with the stock torque converter.
The power peaks at about 4900-5100 rpm (thought it's rated peak in stock trim is stated at 4750 rpm by Ford, in reality it's a bit higher on the dyno - especially when you open up the intake & exhaust), and for actual best acceleration, a 5600 rpm 1-2 upshift point would be needed due to the ratio spread between 1st & 2nd - but that's a little bit too much for the stock torque converter, so we recommend going 5400 rpm on the full-throttle 1-2 and the full-throttle 2-3 upshift points once you have a good intake kit installed, for example. It does *not* hurt your engine to turn those rpms on occasion.
Now you didn't specify if you were talking about part-throttle or full-throttle, but I'm guessing you're concerned about what's going on at full-throttle, probably because you are now seeing higher rpms than you did with the stock factory tuning - and if that is your concern, you really don't need to worry.
I hope that little bit of general info helps, & good luck!
I'll go over something here just briefly with you, then for more info & proper Tech Support you'll want to contact Hypertech directly, or call your vendor..............
It's perfectly normal to have it stay in 1st gear longer with a "performance" tune - from the factory, these vehicles (and most others, too) upshift too soon for best performance & driveability. So if you are worried about seeing 5200+ rpm on the tach when you do a heavy-throttle 1-2 upshift, don't be - that's perfectly OK, up to about 5400 rpm or so with the stock torque converter.
The power peaks at about 4900-5100 rpm (thought it's rated peak in stock trim is stated at 4750 rpm by Ford, in reality it's a bit higher on the dyno - especially when you open up the intake & exhaust), and for actual best acceleration, a 5600 rpm 1-2 upshift point would be needed due to the ratio spread between 1st & 2nd - but that's a little bit too much for the stock torque converter, so we recommend going 5400 rpm on the full-throttle 1-2 and the full-throttle 2-3 upshift points once you have a good intake kit installed, for example. It does *not* hurt your engine to turn those rpms on occasion.
Now you didn't specify if you were talking about part-throttle or full-throttle, but I'm guessing you're concerned about what's going on at full-throttle, probably because you are now seeing higher rpms than you did with the stock factory tuning - and if that is your concern, you really don't need to worry.
I hope that little bit of general info helps, & good luck!
