PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

98 tuning

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Old Jan 8, 2009 | 09:43 PM
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Default 98 tuning

Will I have any issues having my 98 (C5) pcm tuned for a supercharger (550+rwhp)?
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Old Jan 9, 2009 | 06:23 PM
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mine is a 98 but i have n20 and i have no issues with that power level
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Old Jan 9, 2009 | 07:34 PM
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Yea; I'm at 563 on the spray now, but I wasn't sure how how well the 98 pcm would work with boost
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Old Jan 9, 2009 | 09:20 PM
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There are many folks running very fast stock 98pcms no doubt. Lots of options open up with a pcm swap. It's a personal decision only you can determine if it is worth it for you.
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Old Jan 10, 2009 | 08:37 AM
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Originally Posted by BOTTLE ROCKET
Will I have any issues having my 98 (C5) pcm tuned for a supercharger (550+rwhp)?


HPTuners has a 2bar OS for the 98 PCM. If you need to go much past that, I'd recommend a PCM swap.
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Old Jan 10, 2009 | 10:12 AM
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Originally Posted by Frost
HPTuners has a 2bar OS for the 98 PCM. If you need to go much past that, I'd recommend a PCM swap.
How would I know if I would need to go past it? I'm not familiar with when 2bar, 3bar OS is needed. I have just read that the 98 PCMs were "limited" in what they could do (and that they were slower)

I actually have HPTuners, but will NOT try to tune a blower set up
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Old Jan 12, 2009 | 08:27 AM
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If you will make much past 15psi...
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Old May 14, 2009 | 06:42 AM
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so if i do not make over 15 psi with blower i am ok with 98 pcm
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Old May 14, 2009 | 07:34 AM
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I tuned 3 supercharged Vettes in one day, all buddies had the exact same setups, P1SC on Stock Motors sans Headders, All different years. The only difference is that the 98 made about 20 less HP than the 99 & 2000 model. As far as tuning the 98, No problems........
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Old May 14, 2009 | 12:55 PM
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Originally Posted by moehorsepower
I tuned 3 supercharged Vettes in one day, all buddies had the exact same setups, P1SC on Stock Motors sans Headders, All different years. The only difference is that the 98 made about 20 less HP than the 99 & 2000 model. As far as tuning the 98, No problems........
Did you happen to do a baseline dyno?
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Old May 15, 2009 | 08:23 AM
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Originally Posted by Zzzzz
Did you happen to do a baseline dyno?
Dont quote me on exact numbers but I do remember that the 98 made 464 RWHP, the other two were around 486 and the 2000 was closer to 500, I believe it was like 492RWHP, There was more, but I do not do ragged edge tuning. These guys wanted their motors to last a while...
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