1997 C5 How to run a 3 bar?
08-05-2017, 06:28 AM
#1
Advanced
Thread Starter
1997 C5 How to run a 3 bar?
What do I have to do to run a 3 bar on my 1997 corvette? Current setup I'm running 12psi on a 7065 turbo.. Winter build I'm sticking in a L33 5.3 and going up to a 7875 and would like to run 17-18 psi.
08-05-2017, 06:39 AM
#2
Safety Car
If you don't have HPTunes or any other brand you can't do it. You have to bring it to have it tuned. I believe just get a 3bar map sensor and change it out. That's what i did but had to change the tune.
08-05-2017, 06:41 AM
#3
Advanced
Thread Starter
I am running HP Tuner. But I heard somewhere I need to change my ecu to a newer one?
08-05-2017, 08:09 AM
#4
Melting Slicks
Not positive about the 97 ecu but my tuner had a hell of a time finding a 3 bar OS that would work with my 99 ecu.
08-05-2017, 09:56 AM
#5
Melting Slicks
You could run a 3 bar sensor with your 2 bar OS or you could Repin your harness and run a newer pcm. I would Repin the harness because if your ecm ever goes out it will be easy to find a replacement.
08-05-2017, 06:03 PM
#6
Supporting Vendor
HP Tuners doesn't offer a custom 3bar OS for the 97 and 98's. Unless EFI live offers a custom 3-bar OS, you'll have to repin and update to a 411 PCM to get a 3-bar.
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Offering products from A&A Superchargers, East Coast Superchargers, Mechman Alternators, Mantic clutches, RPS clutches, Kooks Headers, Lakewood, LG, Brian Tooley Racing, Comp Cams, FAST, ARP, UPP Turbo systems, Wiseco, Callies, K1, MAST Motorsports, Haltech and many more. PM me for details.
08-07-2017, 08:23 AM
#7
Advanced
Thread Starter
How hard would it to repin the harness? Which PCM would I have to run?
08-07-2017, 08:36 AM
#8
Melting Slicks
08-08-2017, 12:36 PM
#10
Supporting Vendor
no 3-bar OS available. If you simply install the 3-bar sensor and enter the voltage and offset information, it'll stop at the end of the 2-bar table, which is what it will be doing with the current 2-bar sensor installed.
08-14-2017, 12:44 PM
#12
Upgrade to a 99+ 411 PCM and 3 bar OS
08-14-2017, 01:06 PM
#13
Tech Contributor
Memory space isn't as sufficient as the 411 pcm's. If it's possible with EFI live, I wouldn't know. Repinning it to a newer PCM is too easy to worry about it IMO.
