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Back in the day the guy below had his tuned by CT-E and the below psi was were he ended up.
Originally Posted by Allout
Here's what mine reads:
With vacume line connected to FPR:
With vacume line pulled from FPR:
Originally Posted by Allout
This is what mine is set at currently with the HBP and tuned with E-Manage. Shad didn't adjust the FPR at all when he tuned my car so it's the same settings using the standard SC pulley. He said that the only reason you would increase the fuel pressure was if you didn't have the ability to fine tune the lean spots out. You would increase the fuel pressure to richen up the lean spots but would be too rich in other parts of the range.
The Comptech FPR is a rising rate I believe, so it should increase the fuel pressure as load increases. 15afr is a bit lean for idle, and certainly too lean at WOT. Aim closer to 13afr or even lower at WOT.
The Comptech FPR is a rising rate I believe, so it should increase the fuel pressure as load increases. 15afr is a bit lean for idle, and certainly too lean at WOT. Aim closer to 13afr or even lower at WOT.
Thanks Karanx7, I was thinking the same for the 15:1 at idle. I bumped up the pressure about 4 psi to 34 with the vacuum line on, 60 with the line off. Now seems to idle around 14.6-14.8. But, when I push it, the AFR drops way down as low as 10:1 under boost. Which obviously is very rich.
But, to add to the mix I'm not sure the calibration on the sensor is accurate. The previous car it was installed in used to run 100 shot of nitrous. The tuner had claimed the gauge was off as much as 0.3, blaming it on bosch sensors not being as accurate as Denso, In any case, the sensor is several years old and probably could use replacement.
Ordered a replacement wideband sensor. Went to install it and realized I'm an idiot... anyone care to speculate? lol
In nutshell, the car is running a cat and by re-using the stock downstream sensor location, I had inadvertently not considered sensor placement was behind the cat. Anyways, I will be rectifying this as soon as I get a larger drill bit for a pre cat sensor bung.
Yes, I could always use my test pipe, but I drive the car pretty regularly and prefer not to.
05-10-2021, 08:32 PM
