Performance ModificationsWant to talk about performance modifications for your Dodge Challenger? This is the forum for that. Anything from exhaust systems to power adders and everything in between. (Dodge Challenger Performance Modifications)
Vortech states they want it below 11. Anything above 11.5 is pushing it and anything over 11.8 is plain crazy on a FI stock 5.7 bottom end . When Vortech puts their tune out it, will be below 10.8.
10.8 - 11.2 seems pretty rich to me. Being too rich is not really a good thing as it can burn up cats and what not.
When I tuned my 4Runner I went for 11.5 - 11.8 AFR. From what you're saying though....a very small tweak in the WOT AFR resulted in a 12.X AFR between 5K - 6K?
Given the above, I'd take the over rich condition, but keep an eye on those cats.
11.5 is too hot for our pistons when youre boosted.
Vortech states they want it below 11. Anything above 11.5 is pushing it and anything over 11.8 is plain crazy on a FI stock 5.7 bottom end . When Vortech puts their tune out it, will be below 10.8.
Originally Posted by Dudeiwin86
11.5 is too hot for our pistons when youre boosted.
Interesting.....guess different engines need different AFRs. I was told to tune the 4Runner to 11.8:1 before I ever started by one of the Toyota expert tuners. Not being one to just take someone's word for it I tuned it on the dyno, and sure enough it made the most power at 11.8:1 just like he said.
However, the 3.4L Toyota motor is practically bullet proof, so I guess it can take a little more
__________________ -Speedy 2009 Challenger R/T 6 Speed | Mopar CAI | BT Catch Can | Functional Hood Scoops | Magnaflow Competition Series Cat-Back | Hood Struts | SSE | Painted Engine Cover | Painted Brake Calipers | Rally Stripes | Tint | Eibach Pro Kit Suspension | Boss 338 Staggered 20x8.5 front 20x10 Rear | Escort 8500 X50 with Blendmount | Hurst Shifter | Next is a 392 stroker!
The problem with the RT is the ECM for the RT doesn't work like any other ECM. With the adaptive programing, you can't just enter how much fuel you want into the tables and be there. From what I have been told you have to manipulate different conditions into the ECM and basically force the adaptive programing to make the changes for you. My worry then becomes as different conditions occur while driving, will the adaptive programing (months down the road) continue to change my tune into something not so safe? What was suggest before, was to install the Cal ID of the 2008 5.7 and modify that to work with my car. Therefore it would no longer have the adaptive programing. That would have been fine except that the previous Cal ID doesn't support VVT. So that isn't possible. My question then becomes is there a way to disable the VVT and what effect would it have on my performance?
Bearaire's car was having the EXACT same issues as mine but his tuner figured out how to manipulate his ECM to make the needed changes. No one I have taken my car to has yet figured it out. Bearair is going to be traveling home from Houston and I hope to hear from him when he gets home. I want to hear if his tune has made any changes to itself. I know that the adaptive programing is constantly learning and changing. I just don't know enough about it. I also don't know if it can change the tune enough to make it unsafe for FI.
If I can't find any answers, I will run my car on the Dyno after a couple months and compare the AF readings my original tune. Just to reassure myself.
__________________ 2009 SRT8: TorRed, 6 Speed & Loaded Under The Hood: Forged shortblock (9:1 comp),Street Heat heads,
SC Cam,Kook's LT's,Corsa catback,Ram clutch and 11#'s of boost
Kenne Bell style!
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