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speed limiter?

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Old 07-29-2003, 03:52 AM
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speed limiter?
Just curious what the the speed limiter is set at on a 1990 RS 305 TBI? my speedo does not work and it shuts down, at what speed i do not know, any help would be appreciated.
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Old 07-29-2003, 07:18 AM
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My guess with a RS and it did not come with speed rated tires V/Z
the limit should be 115 MPH.
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Old 07-29-2003, 07:32 AM
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When I had the TBI305 in my '91 RS it would shut down at 115. So yeah, DJP is correct.
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Old 07-29-2003, 09:10 AM
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Yup, 115 here check this out:
http://www.thirdgen.org/newdesign/tech/unlimited.shtml

-Rippin
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Old 07-29-2003, 04:36 PM
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MY 91 TBI CUT'S OUT AT 117MPH AT 4,400RPM'S IN OD
OR AT 117MPH AT 6213RPM'S IN DRIVE.
BUT UNDER MY TBI I GOT A 350. OR RATHER HAD A 350 NOW ITS GOINT TO BE A 406.
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Old 07-29-2003, 05:25 PM
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Originally posted by mikey dragster
MY 91 TBI CUT'S OUT AT 117MPH AT 4,400RPM'S IN OD
OR AT 117MPH AT 6213RPM'S IN DRIVE.
BUT UNDER MY TBI I GOT A 350. OR RATHER HAD A 350 NOW ITS GOINT TO BE A 406.
Who cares, the question has been answered.
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Old 07-29-2003, 05:29 PM
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NO NO NEW QIESTION WHY IS THE PONTIAC'S LIMITER SET 2MPH HIGHER THEN THE CHEVY'S.???????????????
CHEVY CAMARO 115 V.S.PONTIAC FIREBIRD 117.
BOTH ARE TBI'S.??????????
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Old 07-29-2003, 05:43 PM
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I dont have a speed limiter and it says RS on my car??????
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Old 07-29-2003, 05:54 PM
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Originally posted by Fast_B4C
I dont have a speed limiter and it says RS on my car??????
Maybe cuz you have a B4C option.

It's probably 117 on both Chevy and Pontiac. Speedos aren't that accurate at high speeds anyways.
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Old 07-29-2003, 05:57 PM
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yeah that's what i figured. there both set at `117mph.
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Old 07-29-2003, 05:58 PM
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Originally posted by Rippin92RS
Yup, 115 here check this out:
http://www.thirdgen.org/newdesign/tech/unlimited.shtml

-Rippin
Not intended to flame anyone or third gen.org but: I am a big fan of thirdgen.org but to me the guy who wrote this as well as thirdgen.org dropped the ball on this one. Wouldn't it be a cleaner job to just remove the speed limiter in the memcal. If you have a buddy with a prom burner and the software it is very simple to do. The limit set at the factory on the cars with Z rated tires at an unobtainable 255 mph.
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Old 07-29-2003, 06:00 PM
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Both are set at 115. At 100+ mph, speedo's arent perfect. You were probably only going 115 even if it said 117.
-Rippin
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Old 07-29-2003, 06:01 PM
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Originally posted by 92BLKL98
I am a big fan of thirdgen.org but to me the guy who wrote this as well as thirdgen.org dropped the ball on this one. Wouldn't it be a cleaner job to just remove the speed limiter in the memcal. If you have a buddy with a prom burner and the software it is very simple to do. The limit set at the factory on the cars with Z rated tires at an unobtainable 255 mph.
It would be cleaner but if you don't have a buddy with the stuff, well then it's no so easy. And if you have the switch somewhere like under the dash, I think it'd be pretty cool. Either way though...
-Rippin
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Old 07-29-2003, 06:07 PM
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It's easy to reprogram the TBI cars since the chip isn't in a large holder like the TPI cars and the later V6's.

I reprogrammed my friends 91 TBI Bird when he went from 2.73 gears to 3.42. He'd hit the limiter at 92mph since the ecm was still reading 115-117 due to the gears.
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Old 07-29-2003, 11:50 PM
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Originally posted by Zepher
Maybe cuz you have a B4C option.

It's probably 117 on both Chevy and Pontiac. Speedos aren't that accurate at high speeds anyways.
Hahaha Yah thats true
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