LT1-LT4 Modifications 1993-97 Gen II Small Block V8

93 z28 hits rev at 107

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Old 02-27-2010, 07:17 PM
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said it bounce like a limiter
Old 02-27-2010, 07:19 PM
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the rev limiter is around 6k rpms. if it was below that it was the speed limiter.
Old 02-27-2010, 07:33 PM
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my brother said it was around 4?
Old 02-27-2010, 07:35 PM
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u can order tunes offline right? no one around here does them as far as i know
Old 02-27-2010, 07:35 PM
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Originally Posted by 93fbody
my brother said it was around 4?
thats the speed limiter for sure.
Old 02-27-2010, 10:26 PM
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Guess some 93's came with limiters. Mine was able to bury the needle stock.
Old 02-28-2010, 10:41 AM
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Can I order a tune off line? No one around me does it
Old 02-28-2010, 11:26 AM
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Yes there is madz28.com, that is Ion and PCM4Less. I've had three tunes through Ion at madz28, I have been happy with them all.

whytryz28, it was stated earlier, but if your car was ordered with z rated tires then it would have no speed limiter.
Old 02-28-2010, 11:41 AM
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Originally Posted by camar0corey
Yes there is madz28.com, that is Ion and PCM4Less. I've had three tunes through Ion at madz28, I have been happy with them all.

whytryz28, it was stated earlier, but if your car was ordered with z rated tires then it would have no speed limiter.
How do you know if it came with z rated tires?
Old 02-28-2010, 11:48 AM
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Originally Posted by stburgpete
How do you know if it came with z rated tires?
Look for RPO code QEA or QII in the glove box (or on the driver door jamb). If either one of those codes are present, your car didn't come with Z-rated tires.
Old 02-28-2010, 02:24 PM
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Originally Posted by RamAir95TA
Look for RPO code QEA or QII in the glove box (or on the driver door jamb). If either one of those codes are present, your car didn't come with Z-rated tires.
Don't have then so i guess i am good to go.
Old 02-28-2010, 02:45 PM
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Ya you just need to tune out the factory speed limiter. Only cars that came with z rated tires have no factory limiter. My first formy was limited at 108ish, make sure you get tires rated for the driving you will be doing.
Old 02-28-2010, 04:18 PM
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which programmer should i get from that z28 store?
Old 03-01-2010, 11:46 AM
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You can do a mail order tune, or buy a Hypertech Power programer. They allow you to change things at home,like the speed limiter, rev limiter, fan settings for 160 stat, correct speedo for gear swaps or tire changes, lets you firm up trans shifts and shift points on autos, they also have a power tune but it dont do much for power. I think they are great for a bolt on car thats still going through changes.
Old 03-01-2010, 03:07 PM
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I think another question he should ask, will a hypertech work on a car that still had a chip in the ecu? Considering after '94 you just straight plugged into the ecu with a programmer through the diagnostic port .
Old 03-01-2010, 03:11 PM
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Originally Posted by Transamthunder
I think another question he should ask, will a hypertech work on a car that still had a chip in the ecu? Considering after '94 you just straight plugged into the ecu with a programmer through the diagnostic port .
He will need to have his chip re-burned.
Old 03-01-2010, 05:22 PM
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Originally Posted by 93fbody
well honestly i havent gotten it that fast yet, but on the other hand my brother did and he said at 107 is all it does
The best fix for that is not letting your brother drive it. Don't let someone else ruin your car, thats your job
Old 03-01-2010, 05:23 PM
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Originally Posted by Transamthunder
I think another question he should ask, will a hypertech work on a car that still had a chip in the ecu? Considering after '94 you just straight plugged into the ecu with a programmer through the diagnostic port .
Whoops! Didnt pay attention to the yr.
Old 03-02-2010, 12:26 PM
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Originally Posted by silverz28camaro
Just be careful man, some kids don't realize how fast these cars are and how easy they are to get out of control.

Is he sure it hit a limiter??? maybe its down on power, How many miles? fuel filters get clogged easy on these cars. My 2000 z28 had 99,000 miles when I changed mine, I cut it open and I was surprized at how much **** was in there. Its so cheap that I replace it every 10,000 miles.

If your filter gets restrictive you run the risk of overheating the fuel pump as well and thats why most fuel pumps go bad. Do an overall tune up.

plugs, wires, air filter, oil change, fuel filter, clean MAF.
+10 im 15 and i drove my dad's 94z m6 and i came out on the highway in first let the clutch go and got stupid sideways and hit 2nd and it was still slidin. and i fucked up third lol(i'm only 15 give me a break) but it really surprised me how fast and quick the back slid around.
Old 03-02-2010, 09:08 PM
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Originally Posted by 93fbody
I have a 93 z28 and it hits is limits at 107mph and i'm sure it could do more? anyone have any ideas how i can make it have more top end?
i have a 95z as a weekend driver and well the other night me and my buddy in his built lil honda ran from a dead stop..i took off t/c and shifted it myself(its automatic ive gotten more power out of it like that) and well of course i beat him pretty bad being a b4c car and all but ....i hit around 107mph as well it over rev'd to about a little over 6k twice and then it kicked into overdrive and kept going its the second time it does it...but it your case sounds like a tranny problem sir check your fluid because when i got this lil bad boy it would act the same way as yours until i serviced the tranny myself

Last edited by Camaro_ZL2; 03-02-2010 at 09:46 PM.


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