Lozic ECU and JB4 map 6 log review

[GennyGuy]

So I messaged Lozic about getting a revised 1.4 bar 91 octane ECU. He wants me to do send another log with 93 only (have 2.5gal E85 right now) running map 0. He’s saying the overboost is related to fuel pressure. What are y’alls thoughts on this?

Post #34, I mentioned your HPFP crashing. Yes this can cause overboost.

Another thing is to check if the fuel stations you are using serve "Top Tier" gas. Fuel is one of the most important things happening with your vehicle. This article should help if you are unfamiliar with the term:

What is Top Tier Gas and Is It Worth It?

Top Tier gas is worth it for some car owners, particularly those who own vehicles that require this type of fuel. Learn more about Top Tier fuels and who needs them.

www.autolist.com

I think at one time both @StingerbyAdoom and I were running the same settings from Lozic, in pretty much the same climate, time of year etc, but my car was running faster. Mainly due to fuel. I don't recall exactly, but his vehicle may have gotten a more aggressive setting later and it still wasn't enough because of the difference in fuel quality. Proper octane and quality fuel are extremely important. Please understand that you risk a lot by not having that right. I just don't want you to blow your engine.

P.S. @StingerbyAdoom I still owe you a run at NED. I'll make sure that happens this year if you're still up for it.

 

[GennyGuy]

I suppose I’ll empty the rest of my tank and refill with 93 only and try one more log for him. I’m also new to WMI so I’ll have to do some more research on it. (If anybody has any links or could help on it would be appreciated). On the unrelated note I’m in TX lol

Honestly, with the boost levels you're seeing, I wouldn't risk my engine for 1 more log. I would just demand the revision and and have it lowered to 1.4 bar. You can always add wmi or cpi later if you want and you shouldn't need a revision for that. With 1.4 bar, you should be able to run 93 octane and mix up to E30 when you want a bit extra power with no issues.

 

[GennyGuy]

Honestly, with the boost levels you're seeing, I wouldn't risk my engine for 1 more log. I would just demand the revision and and have it lowered to 1.4 bar. You can always add wmi or cpi later if you want and you shouldn't need a revision for that. With 1.4 bar, you should be able to run 93 octane and mix up to E30 when you want a bit extra power with no issues.

Well, you can also use the JB4 to try to set a safety limit on boost. You can use it to dial down the boost to help prevent the car from overboosting. You'll need to run car in Map6 and adjust settings. Then you can log and you'll want to check for "ECU PSI". This will let you know how much boost the car is asking for. The idea here is to see what the ECU is asking for without you actually hitting that PSI and risking your engine.

One thing to check before doing this is to check with Lozic if Map6 is going to be ok. When I had my tune, Map6 caused problems with my 1.5 Lozic tune. I never tried with my 1.4 bar as I was still very new and didn't have any overboost issues that would have led to questions. For whatever reason, my JB4 and Lozic were not playing well together. I think it was for both trying to control fuel. And yes, I succesfully used JB4 to control CPI while having a Lozic tune. Just check with him first is all.

 

[G70LEbyAdoom]

Post #34, I mentioned your HPFP crashing. Yes this can cause overboost.

Another thing is to check if the fuel stations you are using serve "Top Tier" gas. Fuel is one of the most important things happening with your vehicle. This article should help if you are unfamiliar with the term:

What is Top Tier Gas and Is It Worth It?

Top Tier gas is worth it for some car owners, particularly those who own vehicles that require this type of fuel. Learn more about Top Tier fuels and who needs them.

www.autolist.com

I think at one time both @StingerbyAdoom and I were running the same settings from Lozic, in pretty much the same climate, time of year etc, but my car was running faster. Mainly due to fuel. I don't recall exactly, but his vehicle may have gotten a more aggressive setting later and it still wasn't enough because of the difference in fuel quality. Proper octane and quality fuel are extremely important, please understand that you risk a lot by not having that right. I just don't want you to blow your engine.

P.S. @StingerbyAdoom I still owe you a run at NED. I'll make sure that happens this year if you're still up for it.

You are spot on with everything mentioned above, Including a run at NED! Hell Yes Im up for it, and I should be hauling a lot faster now than I was before.

 

[SeabrookStinger]

Well, you can also use the JB4 to try to set a safety limit on boost. You can use it to dial down the boost to help prevent the car from overboosting. You'll need to run car in Map6 and adjust settings. Then you can log and you'll want to check for "ECU PSI". This will let you know how much boost the car is asking for. The idea here is to see what the ECU is asking for without you actually hitting that PSI and risking your engine.

One thing to check before doing this is to check with Lozic if Map6 is going to be ok. When I had my tune, Map6 caused problems with my 1.5 Lozic tune. I never tried with my 1.4 bar as I was still very new and didn't have any overboost issues that would have led to questions. For whatever reason, my JB4 and Lozic were not playing well together. I think it was for both trying to control fuel. And yes, I succesfully used JB4 to control CPI while having a Lozic tune. Just check with him first is all.

Yeah I was originally using map 6 with bit 0 and bit 6 enabled and adjusted my FF to prevent over boosting but I’ll ask and see if I can use it to subtract boost to prevent damage for this log.

 

[GennyGuy]

Yeah I was originally using map 6 with bit 0 and bit 6 enabled and adjusted my FF to prevent over boosting but I’ll ask and see if I can use it to subtract boost to prevent damage for this log.

You can lower the boost by RPM. On the User Adjustment page for Map 6, I would input a value of 1.0 for 3500 and 4.0 for 4000 through 7000 RPM. Essentially what should happen is if your ECU asks for say 26psi at 4K rpm, only 22psi should be delivered. This is helpful in pointing out a problem to your tuner. Just to note, even when having your car more dialed in, this tool can still be helpful because each car is going to react a little different.

 

[SeabrookStinger]

You can lower the boost by RPM. On the User Adjustment page for Map 6, I would input a value of 1.0 for 3500 and 4.0 for 4000 through 7000 RPM. Essentially what should happen is if your ECU asks for say 26psi at 4K rpm, only 22psi should be delivered. This is helpful in pointing out a problem to your tuner. Just to note, even when having your car more dialed in, this tool can still be helpful because each car is going to react a little different.

Thanks for the tip, I’ll definitely do this on the next log. I’ll post an update when I empty my current tank and refill with 93 only l. Going to try Shell premium this time. Usually use Valero.

 

[GennyGuy]

Thanks for the tip, I’ll definitely do this on the next log. I’ll post an update when I empty my current tank and refill with 93 only l. Going to try Shell premium this time. Usually use Valero.

Doesn't matter if the fuel is "premium" or not. Literally needs to be "top tier". There's extra detergents that they put in the fuel. You can have top tier that is 87 octane.

 

[G70LEbyAdoom]

Doesn't matter if the fuel is "premium" or not. Literally needs to be "top tier". There's extra detergents that they put in the fuel. You can have top tier that is 87 octane.

a great example of this, is that I have a station a half hour(ish) away from me that only has 91 octane as its highest, yet it always provides the least amount of timing pull for pump gas alone near me.

 

[SeabrookStinger]

Doesn't matter if the fuel is "premium" or not. Literally needs to be "top tier". There's extra detergents that they put in the fuel. You can have top tier that is 87 octane.

I looked into “top tier” and the gas station I normally go to has it. But that’s also what I used when I had the bad ignition timing from the first log. So I’m not sure what Lozic is looking for in the log. The 93 alone wont be enough.

 

[GennyGuy]

I looked into “top tier” and the gas station I normally go to has it. But that’s also what I used when I had the bad ignition timing from the first log. So I’m not sure what Lozic is looking for in the log. The 93 alone wont be enough.

His tune is going to be too aggressive for 1.5bar and just 93. Get the revision, it's your engine on the line not his. He's pretty good about requests, it builds business.

 

[SneakerB]

Well I tried doing a pull one more time and it did not go well lol. The boost got up to 28psi and while accelerating the car felt like it wanted to go faster but it was hesitating. I will be putting the stock ECU back in and run JB4 until I can get a revised ECU. Here is the log from that pull if anyone can give more insight on it. I know the 1.5 bar on 93 only won’t work, just wondering if fuel is the only issue here or something else too.

when i open this log, it shows it was logged on map 8 which is the valet map??

also i dont see 28 psi, the max i see is 24.3 which still isnt safe

also your high pressure fuel pump drops to 4 which is unsafe in itself and for only 2.5 gallons of e85 thats insane

 

[SeabrookStinger]

when i open this log, it shows it was logged on map 8 which is the valet map??

also i dont see 28 psi, the max i see is 24.3 which still isnt safe

also your high pressure fuel pump drops to 4 which is unsafe in itself and for only 2.5 gallons of e85 thats insane

The log was map 6, you might’ve gotten it mixed up with clock which read 8. And I didn’t post the log when I got to 28psi but yeah my fuel isn’t going to support Lozic 1.5 bar tune. Will be putting stock ECU back in and just run JB4 until ECU is revised.

 

[SeabrookStinger]

Update: I had the ECU revised to 1.4 bar on 91 octane. Installed it and drove around 100 miles to let the ECU learn. I did a pull today and it still over boosts and has bad ignition timing. Attached is the log, if someone could review it and see what the issue could be?

 

[ChaneRZ]

21-24 lbs of boost is not good on 91 octane. Need to dial down your boost.

 

[SeabrookStinger]

It’s tuned for 91 octane but I’m using 93 octane. I know the boost is too high just wondering why it is still over boosting after the revision from 1.5 bar to 1.4 bar.

 

[Yves998]

It’s tuned for 91 octane but I’m using 93 octane. I know the boost is too high just wondering why it is still over boosting after the revision from 1.5 bar to 1.4 bar.

Fuel crashes when overboost happens. Need more revision or go ask for a refund.

 

[ChaneRZ]

Did you get codes after that?

 

[SeabrookStinger]

Fuel crashes when overboost happens. Need more revision or go ask for a refund. View attachment 79037

Yeah I messaged Lozic about another revision. Don’t know if I need to go to 1.3 bar or if he can just lower the boost on the 1.4 bar

 

[SeabrookStinger]

Did you get codes after that?

I didn’t get any codes.