LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

lt1 revving to 7k+

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Old Jun 14, 2005 | 01:13 AM
  #31  
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Re: lt1 revving to 7k+

Originally Posted by s i c trans am
no, no. this is not the only lt1 i drive and im definately getting way past 5800 rpms.

theres no way the stock pcm will allow it to rev past the stock limiter, it shuts off the fuel. the previous owner may have used a hypertech programmer to remove the limiter or something. the tranny doesnt limit how high the motor revs to.
Old Jun 14, 2005 | 01:58 AM
  #32  
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Re: lt1 revving to 7k+

My stock tach was off by over 200 RPM. With stock programming it would indicate about 6100 right before the shifts.
Old Jun 14, 2005 | 07:37 AM
  #33  
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Re: lt1 revving to 7k+

check ur tranny fluid. wut color is it????? And r u sure ur pulling that high or it feels like it. i just bought a 94 stock w/ 90k miles on it 2 months ago and was befuddled when my engine revved to 6500-7000 rpms. Sure enough the fluid was brown and im sure its never been changed. I also took the tranny to the shop and the owner told me nothing was wrong with it that it was a regular piece of **** electronic tranny that goes on bec of ur tps telling it to. so who knows but i personally think its a 94 thing.....we have problems. first year with that damn tranny.
Tranny fluid is and has been nice and red since the day i brought her home. As for the tach being off, i dont tihnk that the tach would be off to the point of where it hits 7 and actually still climbs a little more before shifting. I mean its done this in 2 different sets of gauges and since the tach on the v6 and v8 gauges are the same there would be no reason for the v6 to even be different,but it sitll does it with v8 ones.

I'm gunna pull the oil cap and see today wat i got in there. I'll keep you guys posted.
Old Jun 14, 2005 | 07:16 PM
  #34  
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Re: lt1 revving to 7k+

Originally Posted by easyc4
Tranny fluid is and has been nice and red since the day i brought her home. As for the tach being off, i dont tihnk that the tach would be off to the point of where it hits 7 and actually still climbs a little more before shifting. I mean its done this in 2 different sets of gauges and since the tach on the v6 and v8 gauges are the same there would be no reason for the v6 to even be different,but it sitll does it with v8 ones.

I'm gunna pull the oil cap and see today wat i got in there. I'll keep you guys posted.

The factory fuel shut off is at 7200 and it won't go past that unless someone has put a fuel table in to go over. Don't think that can happen.
Old Jun 14, 2005 | 07:28 PM
  #35  
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Re: lt1 revving to 7k+

Originally Posted by 1racerdude
The factory fuel shut off is at 7200 and it won't go past that unless someone has put a fuel table in to go over. Don't think that can happen.
That is where the fuel map ends right? The factory rev limiter, which cuts fuel, comes in at 5875 or somethign right?
Old Jun 14, 2005 | 07:37 PM
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Re: lt1 revving to 7k+

yeah thats the factory fuel map. i think to go further you need a stand alone. the limiter is preset to about 5800, which is why i said it must have been removed, because theres no way it will rev that high just because the tranny lets it.
Old Jun 14, 2005 | 07:37 PM
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Re: lt1 revving to 7k+

Originally Posted by jchevy
That is where the fuel map ends right? The factory rev limiter, which cuts fuel, comes in at 5875 or somethign right?
Factory redline and the fuel shut off are TWO different things.
The 7200 fuel shut off means the engine won't go any higher,the redline on your tach is suppose to be the peak power shift point of a STOCK engine.A built engine will blow through the redline,but is stopped from more revs at about 7200 where the computer runs out of fuel map.
Old Jun 14, 2005 | 07:44 PM
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Re: lt1 revving to 7k+

I am talking about the factory rev limiter, not optimum shift points. Are you saying there is no rev limiter on the car? The only limiter is when the PCM cant comprehend any more RPM which is 7200rpm.
Old Jun 14, 2005 | 07:48 PM
  #39  
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Re: lt1 revving to 7k+

Originally Posted by jchevy
I am talking about the factory rev limiter, not optimum shift points. Are you saying there is no rev limiter on the car? The only limiter is when the PCM cant comprehend any more RPM which is 7200rpm.
YES
If ya have a auto manually shift it.It will go anywhere under 7200.Ya have to move the stick at whatever ya want it to shift at.

If it won't go above 5800 or so then there is something else wrong,not the rev limiter.
Old Jun 14, 2005 | 07:57 PM
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Re: lt1 revving to 7k+

Originally Posted by 1racerdude
YES
If ya have a auto manually shift it.It will go anywhere under 7200.Ya have to move the stick at whatever ya want it to shift at.

If it won't go above 5800 or so then there is something else wrong,not the rev limiter.

Is this a 94 year specific? I used to have a 95 auto car it would hit a rev limiter at around 6000 rpm on the tach. There is also a rev limiter set in LT1 edit.
Old Jun 14, 2005 | 08:02 PM
  #41  
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Re: lt1 revving to 7k+

Originally Posted by jchevy
Is this a 94 year specific? I used to have a 95 auto car it would hit a rev limiter at around 6000 rpm on the tach. There is also a rev limiter set in LT1 edit.
Not to my knowledge.My '94 will go until it shuts off at 7200 in any gear.
That 6000 in the '95 may have been something else.
Old Jun 14, 2005 | 08:08 PM
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Re: lt1 revving to 7k+

There is no way in hell the LT-1 has a rev limiter below 6K.

When I first brought my car...I was so used to redlining from my good ol Honda days... 8K rpms was a joke.... when I looked at the tach and saw I only had 7K I laughed.... and so I proceeded to reach it. My car being 1 week old in my possession. I reved that damn car higher than I would ever think of to do this day... I was way above 6.2K and I keep mashing it down... then suddenly I heard Boom!!! My face dropped in my lap as I thought... what the hell was that. My car had seriouss backfire afterwards... till I got the car on a lift and inspected it... I had blown the Catilyc converter to hell... on my trip to 7K... luckily that was the only thing I messed up. That was 50K miles ago... so I think I'm safe now.
Old Jun 14, 2005 | 08:15 PM
  #43  
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Re: lt1 revving to 7k+

my 94 had a limiter set at 5800, so does my 93.

theve been removed long since, but im pretty sure there is a factory limiter.


http://web.camaross.com/forums/showt...ht=rev+limiter

there madwolf, who programs lt1 pcms, states :

5886 for 1st gear and 5805 for the other gears is stock rev limiter.
If shifts are recalibrated correctly, it should shift at stock shift points, although *I* normally raise the 3-4 shift just a tiny bit so the car traps in 3rd in the 1/4.

I would set the rev limiter between 6000 and 6200.


so i would say someones removed the factory preset

Last edited by 93formula; Jun 14, 2005 at 08:21 PM.
Old Jun 14, 2005 | 08:24 PM
  #44  
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Re: lt1 revving to 7k+

I have a 6 speed... maybe it's different, but I re adjusted my tach to the exact Tech 2 readings at the dealership. It wasn't off by much suprisingly... but untouched My MSD has a 6K pill in there that knockes here out at 6K.
Old Jun 14, 2005 | 08:32 PM
  #45  
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Re: lt1 revving to 7k+

As far as I know there is a factory rev limiter and it kicks in at about 58xx rpm. There are settings for rev limiters in LT1 edit. Hypertech programmers allow you to change the rev limiter. The car has one.

Those of you who say your are hitting upper 6000s on the tach i would be interested to see a datalog of your cars. The PCM reads a different RPM than the tach displays. Its possible that your tachs are that far out of calibration.



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