need some info for zr1 map sensor on hptuners
03-12-2018, 01:07 AM
#1
Pro
Thread Starter
need some info for zr1 map sensor on hptuners
So I have a question about the zr1 map sensor. Do I need to change the map sensor linear from 305 kpa to 312.5kpa and the map sensor offset from 10.33 kpa to -11.25kpa. The reason i ask is cause I converted to 3 bar os, and no matter what I do, the car is running pig righ at idle. Its in the high 9 to low 10 afr.
03-12-2018, 09:32 AM
#2
Supporting Vendor
To answer your question, yes, you need to change your linear and offset according to what you have in the motor.
If you're running pig rich at idle, it has almost nothing to do with your MAP values. You need to dial in the VE and MAF accordingly, after putting in the correct injector data. Without the correct injector data, you may never be able to get the car to idle at 14.7. I've gotten injector data from places that I've had to change and come up with my own, just to get the injectors to do what they're supposed to. Some injectors are difficult to slow down enough to get to idle with any real AFR stability, but I've never had to leave one at 10:1 AFR before, and I've got C5's out there with 325lb injectors in them.
It's important to make sure you're idling in the vacuum region and not showing above 100kPa for some reason. If you're idling in power or boost enrichment mode, that'll certainly make things worse.
I can work on your tune remotely if you need.
Bret
If you're running pig rich at idle, it has almost nothing to do with your MAP values. You need to dial in the VE and MAF accordingly, after putting in the correct injector data. Without the correct injector data, you may never be able to get the car to idle at 14.7. I've gotten injector data from places that I've had to change and come up with my own, just to get the injectors to do what they're supposed to. Some injectors are difficult to slow down enough to get to idle with any real AFR stability, but I've never had to leave one at 10:1 AFR before, and I've got C5's out there with 325lb injectors in them.
It's important to make sure you're idling in the vacuum region and not showing above 100kPa for some reason. If you're idling in power or boost enrichment mode, that'll certainly make things worse.
I can work on your tune remotely if you need.
Bret
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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.
Last edited by BLOWNBLUEZ06@RKT Performance; 03-12-2018 at 09:34 AM.
03-12-2018, 04:00 PM
#3
Pro
Thread Starter
Thanks for the info Bret. I bought my 80lb deka injectors from the fuel injector connection, and They came with data. I hope it’s the correct data. Also, I’m not running a maf, and I also noticed that the car isn’t going into closed loop, so I can’t really get any data to start dialing in the ve table. I really want to try to figure it out, but if I can’t, I’ll let you know, so you can tune it
03-13-2018, 11:19 PM
#4
Pro
Thread Starter
So I figured out the issue. It turns out that my brand new ntk o2 sensors were bad. I replaced them just to try to see if it would work, and sure enough, it started up and when it hit 131 deg ect, it went into close loop. Started adjusting the ve table a bit and now it idle’s pretty good and the afr is staying around 14.7
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skull (03-23-2018)
03-20-2018, 12:06 AM
#6
Pro
Thread Starter
No problem. I know what you mean, I look up things on here to try to find solutions, and they almost never come back and say how they fixed the issue. Its a bit annoying.