[ZL1Kraut]

2018 Camaro SS1LE with Procharger P1SC1, stage 2 Intercooler.
Stock fuel pumps and injectors running canned procharger tune.

I was at Pocono and could only make it through 3/4 of one session before pulling in. Something felt off and it was definitely pulling timing as power dropped significantly. At this point no lights in the dash came on.

I went back out for the second session and on the first lap heading onto the back straight the dash lit up like a Christmas tree, service rear differential, stabilitrak, the whole bit came on and check engine light was flashing, so I called it a day and limped the car 3 hours home.

1/2 way home after stopping for gas, the check engine light is off and full power is restored. Once I got home I checked for codes and have P1101 and P0171. So something with the MAF and running lean on bank one.

I don’t have any logs to see where things are at, but I’m guessing I’m running out of fuel?

Any ideas? Thanks!

[laynlo15]

I'm guessing you might have been running out of fuel on the low side and draining the fuel rails dry. Are you logging your runs with HP Tuners? If not you should be.

[KingLT1]

Stock fuel system isn't sufficient on boost with proper AFR. Procharger canned tune is good enough to start and drive. That's about as far as I would trust it.

[laynlo15]

Originally Posted by KingLT1

Stock fuel system isn't sufficient on boost with proper AFR. Procharger canned tune is good enough to start and drive. That's about as far as I would trust it.

[ZL1Kraut]

Originally Posted by KingLT1

Stock fuel system isn't sufficient on boost with proper AFR. Procharger canned tune is good enough to start and drive. That's about as far as I would trust it.

Were on the same page here for sure.

Only thing that has me confused is, it's never done anything like this on the street during a hard pull and also I did one other track day at Watkins Glen last fall with it and the car performed perfectly. The car only has 18k miles and the procharger has been on the car for maybe 1500 miles.

So my thing is now, if I add some LT4 injectors and high pressure fuel pump to the mix along with a real tune, will it be too much power for the glass LT1 pistons...

[KingLT1]

Originally Posted by ZL1Kraut

Were on the same page here for sure.

Only thing that has me confused is, it's never done anything like this on the street during a hard pull and also I did one other track day at Watkins Glen last fall with it and the car performed perfectly. The car only has 18k miles and the procharger has been on the car for maybe 1500 miles.

So my thing is now, if I add some LT4 injectors and high pressure fuel pump to the mix along with a real tune, will it be too much power for the glass LT1 pistons...

no I don't think that will be too much at all but I would also add a JMS booster to the low side. I would also consider a catch can with a breather to vent crank case pressure.


Last thing would be to go with better octane fuel. 93 is pretty much piss water with a stock compression LT1 on boost. Consider mixing in some race gas or running a blend of Ethanol on track or race days.

[cjperformance]

Procharger canned tune will destroy your engine. I went through the same thing. At min do LT4 inj, LT4 high side fuel pump + JMS or DSX for low side or i think JMS + aux port inj instead of all of that. Also recommend 3 bar map and baro breakout. Basically all the things in my sig. Lmk if you have questions.

[cjperformance]

Regarding the glass pistons... you are in a much more dangerous spot without those mods. You'll be safer with them.

[ZL1Kraut]

To be honest, I hadn’t anticipated having to add any additional fueling mods to the mix considering this was supposed to be a simple and conservative build.

According to my research, the low side fuel pump in the 1LE is the same as a ZL1. I’m not looking for more than 600 whp, (ZL1 power levels) so is the low side boost pump entirely necessary? I would add the ZL1 injectors and HPFP along with a proper tune if that would remedy the situation.

[cjperformance]

Most recommend the JMS if you already have the LT4 low side pump. Its an electronic device that ensures the LT4 low side pump is operating optimally. Its not a pump itself, just a pump voltage "modifier" to ensure low side volume stays adequate. You should be ok with JMS + lt4 hpfp and lt4 inj.

And yeah, the fueling mods were a surprise to me too. Be glad no damage was done. The pc canned tune is a recipe for disaster.

Honestly i dont know exactly how the JMS works, i just know everyone recommends it. I def dont have an lt4 low side, and it wouldnt help me much, which is why i went with aux pump. In hindsight, wish i went with an intank upgrade instead of aux low side pump.

[KingLT1]

Originally Posted by ZL1Kraut

To be honest, I hadn’t anticipated having to add any additional fueling mods to the mix considering this was supposed to be a simple and conservative build.

According to my research, the low side fuel pump in the 1LE is the same as a ZL1. I’m not looking for more than 600 whp, (ZL1 power levels) so is the low side boost pump entirely necessary? I would add the ZL1 injectors and HPFP along with a proper tune if that would remedy the situation.

There are some changes that can be made in the tune that will help the low side aside from the JMS. It does seem that the JMS works better. I would suggest a full fuel system.

A roadcourse car is the absolute worst possible situation for a stock supercharged LT1 with a canned tune.

You need more fuel supply, so you have enough fuel in the event COT kicks on to cool the cats down.

A lot of companies are in business to sell parts. How many supercharger kits would be sold if they required a 2000.00 fuel system to "do it properly" vs being able to "bolt-on and go" with a canned tune and stock fuel system? They don't give a shit if you blow it up, they just want to make the money.

Hell I remember when Procharger came out with the P1sc kit 22yrs ago. I bought one for a 4th gen Fbody. It was designed supposedly to work with the stock tune. Guess how long that lasted?

[ZL1Kraut]

Thanks guys! I really appreciate the advice

I was really hoping to get a couple more track days in before the end of the year but I'm thinking that's not going to happen as I've got some decisions to make on how far I want to take this thing. I might just have to go back to a ZL1 and roll the dice one more time. Seems like it might be the path with the least amount of bullshit in the future. The only hold up is, the first one ate an oil pump at 150 approaching the bus stop at Watkins Glen and then dealing with the warranty aftermath was a nightmare so who know what I'll do. Thanks again!

[cjperformance]

Originally Posted by ZL1Kraut

Thanks guys! I really appreciate the advice

I was really hoping to get a couple more track days in before the end of the year but I'm thinking that's not going to happen as I've got some decisions to make on how far I want to take this thing. I might just have to go back to a ZL1 and roll the dice one more time. Seems like it might be the path with the least amount of bullshit in the future. The only hold up is, the first one ate an oil pump at 150 approaching the bus stop at Watkins Glen and then dealing with the warranty aftermath was a nightmare so who know what I'll do. Thanks again!

I would def not run at the track on that canned tune. I'm honestly surprised it has lasted this long. Example... on my car, the canned tune didn't even activate power enrichment at WOT. It seems that it has taken a lot less to damage other engines. In some cases one good long WOT pull was enough to cause piston damage.

[m6-lt1]

Originally Posted by ZL1Kraut

Thanks guys! I really appreciate the advice

I was really hoping to get a couple more track days in before the end of the year but I'm thinking that's not going to happen as I've got some decisions to make on how far I want to take this thing. I might just have to go back to a ZL1 and roll the dice one more time. Seems like it might be the path with the least amount of bullshit in the future. The only hold up is, the first one ate an oil pump at 150 approaching the bus stop at Watkins Glen and then dealing with the warranty aftermath was a nightmare so who know what I'll do. Thanks again!

Just curious but was your zl1 stock when the oil pump blew up? Just trying to figure out why you had such bad warranty experience. Most people on these boards have had good experiences getting their motor replaced when the oil pump took a dump on track.