whats the speed limit on a 94 lt1
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Joined: Nov 2002
Posts: 1,072
Originally posted by Injuneer
Depends what tires it came with... Z-rated has no limit (I think the default entry in the 8-bit PCM field is 255), non-Z rated tires were around 108-110mph.
Depends what tires it came with... Z-rated has no limit (I think the default entry in the 8-bit PCM field is 255), non-Z rated tires were around 108-110mph.
and all of'em have a speed limiter, i'm pretty sure...
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Joined: Jul 2002
Posts: 3,768
From: Friendswood, TX, USA
There's a large thread on this if you do a search. But it depends on the package. There can be either/or an rpm limiter and/or a speed limiter. Generally there seems to be two speeds, one around 100mph and the other around 150mph +.
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Joined: Nov 1998
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From: Hell was full so they sent me to NJ
I think Madwolf had the last word in that thread:
I haven't read the whole post, but here's some info I gathered from experience.
93-95 cars with non z rated tires and an older PCM calibration were limited to 108 MPH and received a 110 speedo.
94 and 95 cars had a newer calibration from GM which raised the limit to 118 MPH.
93-95 Z-rated cars all had the speed limiter set to 255 MPH.
96-02 F cars with non z-rated tires all had 118 MPH speed limiters.
96-02 F cars with Z rated tires were all limited to 160 MPH.
Yes, it does cut fuel for that instant, both when it hits the rev limiter and/or the speed limiter.
93-95 cars with non z rated tires and an older PCM calibration were limited to 108 MPH and received a 110 speedo.
94 and 95 cars had a newer calibration from GM which raised the limit to 118 MPH.
93-95 Z-rated cars all had the speed limiter set to 255 MPH.
96-02 F cars with non z-rated tires all had 118 MPH speed limiters.
96-02 F cars with Z rated tires were all limited to 160 MPH.
Yes, it does cut fuel for that instant, both when it hits the rev limiter and/or the speed limiter.
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Joined: Nov 2003
Posts: 1,770
From: Mishawaka, IN
93-95 Z-rated cars all had the speed limiter set to 255 MPH - Is that the maximum speed that the computer can handle? - what is it, like 11111111 or something???
I was just wondering if you could go faster than that.
I was just wondering if you could go faster than that.
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Joined: Nov 2003
Posts: 1,770
From: Mishawaka, IN
Well 255 is 16 squared minus one, so obviously it's the maximum number that the computer is capable of handling- so I guess there's a spot for one and there has to be a number in there.
As far as if you could remove the limiter completely with some vudu tuning, or just set the limiter at zero and see if the car moves, I dunno.
As far as if you could remove the limiter completely with some vudu tuning, or just set the limiter at zero and see if the car moves, I dunno.
