944 Turbo DIY TunerPro Chips

Talk and Tech about turbocharged 924/944/968 cars
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zooklm1
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vacobra wrote: Thu Jun 25, 2026 9:33 pm
Tom wrote: Wed Dec 10, 2025 8:05 am This reminds me, I'd like to find a volunteer or three to test out my baseline performance chip for the 951. Only catch is we'd need a stock car with wideband (and preferably a boost controller) so we can log the AFR and fine tune as needed. If you have or know of anyone with a stock 951 who might be interested, please let me know! I'd supply the chips for free, and dial them in based on the wideband logs. I'll even throw in a pre-wired knock counter to add more data to the mix and make it worth you while!

Tom did you find anyone? I wouldn’t mind being a volunteer I have a manual boost controller, boost gauge, and an arm series x wideband installed.
I have been working with Tom on the chip project since early May. It has been quite a learning experience. A big item was that at more than 11-12 psi boost, you can not get lower than 12.2 AFR above 5200 rpm (at WOT) with the 2.5 bar FPR. My goal is to get to 15 psi boost and have changed to a. 3 bar FPR to get to a safe AFR. I should get a new chip to try tomorrow. I am almost completely stock with the exception that I have a 3” down pipe back CAT delete exhaust with 38 mm tial wastegate.

#81

vacobra
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zooklm1 wrote: Fri Jun 26, 2026 9:10 pm
vacobra wrote: Thu Jun 25, 2026 9:33 pm
Tom wrote: Wed Dec 10, 2025 8:05 am This reminds me, I'd like to find a volunteer or three to test out my baseline performance chip for the 951. Only catch is we'd need a stock car with wideband (and preferably a boost controller) so we can log the AFR and fine tune as needed. If you have or know of anyone with a stock 951 who might be interested, please let me know! I'd supply the chips for free, and dial them in based on the wideband logs. I'll even throw in a pre-wired knock counter to add more data to the mix and make it worth you while!

Tom did you find anyone? I wouldn’t mind being a volunteer I have a manual boost controller, boost gauge, and an arm series x wideband installed.
I have been working with Tom on the chip project since early May. It has been quite a learning experience. A big item was that at more than 11-12 psi boost, you can not get lower than 12.2 AFR above 5200 rpm (at WOT) with the 2.5 bar FPR. My goal is to get to 15 psi boost and have changed to a. 3 bar FPR to get to a safe AFR. I should get a new chip to try tomorrow. I am almost completely stock with the exception that I have a 3” down pipe back CAT delete exhaust with 38 mm tial wastegate.
Very similar to me I have a tial also but stock exhaust. How does it run compared to stock

#82

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