[Z OH 6]

Originally Posted by KingLT1

Why? It's maf controlled, can see ethanol, and you still use a wideband in the exhaust to tune like you would with anything else that is open loop.

Dedicated wideband would allow for closed loop fuel control so it will self correct. Yeah that would be nice but GM stuff has been going plenty fast with Open loop fueling for years.

You're asking the wrong person, I don't own a major shop. You would have to ask those questions to them. I'm simply agreeing that lack of wideband is likely holding them back from using the current controllers.

[KingLT1]

Originally Posted by Z OH 6

You're asking the wrong person, I don't own a major shop. You would have to ask those questions to them. I'm simply agreeing that lack of wideband is likely holding them back from using the current controllers.

I just went back and seen you edited you initial reply. So yeah now that makes more sense and I agree.

[arpad_m]

Congratulations, Ron, I'm glad you got it done. Your car is more amazing than ever

[2018ZL1]

Very impressive!! Congrats!!!

[Ron_Robinson1]

Originally Posted by arpad_m

Congratulations, Ron, I'm glad you got it done. Your car is more amazing than ever

Thanks, really appreciate it.

Originally Posted by 2018ZL1

Very impressive!! Congrats!!!

Thanks man. sorry about your car, I saw your post. When your new build gets done this will be a thing of the past.

[Z OH 6]

Originally Posted by KingLT1

I just went back and seen you edited you initial reply. So yeah now that makes more sense and I agree.

I just checked with Elite Tuned and they are doing tuning now with the Reflex Plus controller. If you weren't aware Elite Tuned is the Vengeance Racing tuner as well as many other shops since they do a lot of remote tuning since leaving VR exclusively.

[KingLT1]

Originally Posted by Z OH 6

I just checked with Elite Tuned and they are doing tuning now with the Reflex Plus controller. If you weren't aware Elite Tuned is the Vengeance Racing tuner as well as many other shops since they do a lot of remote tuning since leaving VR exclusively.

Yep, I heard that. Really the only shop I read say they wouldn't use it until it got wideband support is Joe @ Cordes performance. But he didn't elaborate why...

[2018ZL1]

Originally Posted by Ron_Robinson1

Thanks, really appreciate it.




Thanks man. sorry about your car, I saw your post. When your new build gets done this will be a thing of the past.

Thanks for the kind words!

[laynlo15]

Originally Posted by KingLT1

That price includes the reflex plus and has proven to be very capable and easy to tune. I don't know what you mean by preferred, but it hasn't been out long enough for those using Holley to prefer one or the other. I suppose once it gets wideband support some bigger name shops might switch to it.

King is exactly right and that's my setup with THPSI PI with Reflex controller. Mine was the first car down the track with the Reflex, its a serious controller and Mike wired mine in the Drury in Parking lot in the dark with a couple lights. Ran it at the Ls Fest the next morning. Killed it and love the setup plus easy to tune.

[laynlo15]

Originally Posted by Ron_Robinson1

I have been on this forum for like a decade and have had 3 different Camaros during that time. When this 6th Gen came out I new this would be the one. I bought this car 5 years ago, this is actually the longest car I have ever owned. This thing has truly reached every goal I have set for it.

Went 11.2 with just a tire
Went 10s with boltons
Went 9.6 with a cam added
Went 9.0 with a 2650 & 15” conversion added
And now has gone 8.84 at 156 with Holley Port injection on X85.

This really is a great platform.

Those are some great numbers Ron. Congrats. Which 2650 are your running? Maggie or Ebrock?

[laynlo15]

Originally Posted by Ron_Robinson1

The Toohighpsi is the ticket for sure. I know some tuners don’t want to use it yet because of the wideband. Others have used it with great results.

There are lots using it, they can barely keep up with the orders. Mine with just my AEM wideband is all that's needed for tuning. Hopefully Mike will chime in with more explanation on the wideband tuning that I have. Matt from Nickey has tuned at least 3 with THPSI and they have several others in the works. Matt did a video about tuning the PI.

[KingLT1]

Originally Posted by laynlo15

There are lots using it, they can barely keep up with the orders. Mine with just my AEM wideband is all that's needed for tuning. Hopefully Mike will chime in with more explanation on the wideband tuning that I have. Matt from Nickey has tuned at least 3 with THPSI and they have several others in the works. Matt did a video about tuning the PI.

I don't really need an explanation on open loop wideband tuning. Your car is tuned no different from the rest of ours in that aspect. All you have to do for your car is go to the MAF table in the area where boost comes in(typically around 6-7k hz) and pull X amount of air flow (35% in your case) from the table. Then go to the reflex controller and set it up to fuel the difference that you removed from the maf table on the stock ECU. If you need more or less fuel from the PI system then you adjust the injector flow rate in the Reflex software...All while verifying AFR with an external wideband. Now you have a 65/35 split fueling ratio(DI/PI). The system still operates in Open loop either way. Very straight forward and easy to understand.

What is being questioned is why a few shops want dedicated Wideband support for closed loop fueling @ WOT which the Holley has? This means The ECU will adjust fueling as needed based on o2 and maf data even when WOT. Up until the C8 Vette GM has always used narrowband o2 sensors and defaults to Open loop when entering PE mode(WOT). So the ECU uses a fixed set point for WOT fueling(PE). However, the ECU still relies on the MAF to adjust for air density.

I believe some of the Closed loop WOT fueling advantages are easier and more accurate tuning, but we have been successfully tuning big HP GM cars for years in Open loop with no trouble. I found it odd when Cordes performance said "we won't run it until there is wideband support". I just wanted some clarification why? Perhaps Mike can chime in on that?

[laynlo15]

Originally Posted by KingLT1

We don't really need an explanation on open loop wideband tuning. Your car is tuned no different from the rest of ours in that aspect. All you have to do for your car is go to the MAF table in the area where boost comes in(typically around 6-7k hz and pull 30% of air flow from the table. Then go to the reflex controller and set it up to fuel the difference that you removed from the maf table on the stock ECU. All while verifying AFR with an external wideband. Then you have a 70/30 split fueling ratio(DI/PI). The system still operates in Open loop either way.

What is being questioned is why a few shops want dedicated Wideband support for closed loop fueling @ WOT which the Holley has? This means The ECU will adjust fueling as needed based on o2 and maf data even when WOT. Up until the C8 Vette GM has always used narrowband o2 sensors and defaults to Open loop when entering PE mode(WOT). So the ECU uses a fixed set point for WOT fueling(PE). However, the ECU still relies on the MAF to adjust for air density.

Closed loop wideband sensors advantages are easier and likely more accurate tuning, but we have been successfully tuning big HP GM cars for years in Open loop with no trouble. So I found it odd when Cordes performance said "we won't run it until there is wideband support". I just wanted some clarification why? Perhaps Mike can chime in on that?

Thanks for the explanation, King. Appreciate it. That is correct on our fueling for the PI and DI, ours is 69/31 but darn close to what your saying. I can always depend on you to help me out. Thx, I think Mike has already explained this anyway, I didn't know that much about the Holley PI and controller. Glad Rons having good luck with it, his car is fast as hell.