New to Tuning. Current setup on 12 SS camaro with Twin Turbos.

[KalCorp]

Hello all!

I have a 2012 2SS/RS convertible Camaro A6 with Twin Turbos and just got my MPVi3, starting to learn what it can do.

The car has been tuned twice that I know of. The first time was over 8 years ago when the engine was modified with a cam and stall. The second time was around 5 years ago when the turbos were added. Recently, I updated the differential with 3.91 gears and needed to change the gear ratio for the speedometer. So, I decided to learn how to do this myself.

I used the Gear/Tire wizard, and everything worked great. The speedometer is now working correctly, and it feels like the shifts are better now that the transmission multiplier is set correctly.

The engine has undergone several modifications, including:
2 x Borg Warner S300 60mm turbos
ICT Billet High Rise Manifold
FI Cam 231/239 #50 .617/.624 115 LSA
BTR Dual Spring .660" & Trunnion kit
LS3 upgrade, LS7 Lifter set
Katech C5R timing chain
Meling Oil pump / PATC Billet Converter
Fast 85lb LS3 injectors / ZL1 fuel pump
3.91 Rear Gears / Detroit TrueTrac Diff

The last tune when the twin turbos were fabricated and was on dyno but tuner was remote, and honestly the car was not ready for it. I was told the AC was stuck on (custom dash kit locked up) easy reset but they never asked. Also, I found the exhaust manifold bolts were only hand-tight, which likely let in some air. The gaskets blew a week after I got it, and I discovered this and some other questionable things. I won't go into details.

The car runs okay and has been ok for years, but I don't really push it. It's more for looks than power, but I know it can be so much more!!!
I understand it's going to take some time to learn all this through trial and error. I've been learning when I can from the web, posts, videos, and more videos.

I just wanted to post my tune status and see if anyone who knows anything can spot anything that stands out that I should look next?

What I've changed so far in this tune: ( Compaired to 2 stock ones so i can see what was done in past)
Update 1.00 Speedo Calibration Tire Size: 27.79 28.7 Gear Ratio 3.27 3.91 Trans Multiplier 0.864


I spent alot of time making this setup look like it does. i did everything but the welding stuff and pin striping

Some pics and info of the Camaro are available at @ https://www.facebook.com/NBECAMARO
NBECamaro-ENG1.jpg



Current updated Tune: 12/5
v3.02: T3.02_FSCM_OS-20812686_2012-Camaro_SS_A6.hpt / T3.02_ECM_E38_OS-1250236_TCM_T43_OS-24261871_2012-Camaro_SS_A6-deatschwerks-16u-00-0065-8.hpt

Current updated Log: 12/5
v3.02: v3.02-Quick2MileDrive2.hpl

[SiriusC1024]

You're way down on fuel in all areas. It's a more or less consistent amount. Verify fuel pressure first of all.

[Alvin]

I saw 27 pounds of fuel pressure at 6000 RPM in your log. That is the first problem

[blindsquirrel]

Fast 85lb LS3 injectors

Ugh. No data out there for those.

Also, pretty sure that claimed "85LB" will be at 43 PSI, not 58. Every last bit of the other injector data is still stock LS3.

[SiriusC1024]

Yeah don't show us a WOT pull. It'll probably cause damage. Fix the fuel pressure problem. Supply the injector part number.

Nvm on the injectors. Looks like the people who charge $1200 for an intake are also charging $500 for a set of drilled factory injectors. You obviously care about your car. Do it and yourself a favor and get something like FIConnection injectors that have GM data.

[kevin87turbot]

Ugh. No data out there for those.

Also, pretty sure that claimed "85LB" will be at 43 PSI, not 58. Every last bit of the other injector data is still stock LS3.

You're correct. The injector characterization data is all wrong for those injectors. FAST just decaps the LS3 injectors. That makes for an injector flowrate of around 94 lb/hr at 58 psi.
There are a couple of other companies that sells decapped LS3 injectors. I typically just use the FIC 850 data. It's as close as you can get.

The OP definitely has some fuel pressure issues! The ZL1 pump just isn't keeping up. It's time to step up to a dual pump system.

[SiriusC1024]

And a wideband.

[edcmat-l1]

Sweet bullhorn exhaust. Now you'll be able to see the fireworks when you burn a piston LOL

[KalCorp]

Thanks for all the input!

I can only go by what I was told when the twin turbos were fabricated years ago. Most likely, I was given incorrect information, and cheaper parts were used than what was agreed upon (this has happened with other stuff as well). I don't mind upgrading if needed. I will look into FIConnection injectors and find out which ones to get.

I currently have a Glowshift wideband and am waiting on an HP Tuners PROLINK+ Cable to link it. While I should probably get an AEM one, I already have this, so I might as well try it.

As for the ZL1 pump, to be honest, I don't know 100% anymore. That is what I was told, but I have not verified it. I need to check into that as well.

The injectors might be these https://www.fuelairspark.com/8-preci...injectors.html but not 100% since i didnt buy them.
but the sites has tthis • 85 lb/hr (892.5cc/min) at 58 psi (Stock OEM LS operating pressure)


Again, thanks for the 101 and heads up on issues.

[Alvin]

I've not had a problem with the FAST 85's but they are not my first choice either. I wouldn't buy them for a build.

Having said that I've used ID 850 data for them and it has worked out seemingly OK. I have been ASSuming that bosch only makes a handful of injectors and these companies are just rebranding them/ flow matching them/ mismatching parts/ etc. So then data from one place should be close for all of them.. close enough. This is all a guess and it doesn't have to be.. plenty of good injector companies that offer data for what they are selling.

Is there any proof that they are drilled or decapped. They definitely don't act like decapped injectors.

[KalCorp]

Forgot i had a friend clean the injectors 2 years ago.

This was them and report of data. not all the data but only what i got for now.

maybe i should up the volts for pump from 12 to 15 :-)

2.jpg1.jpg3.png

[edcmat-l1]

Forgot i had a friend clean the injectors 2 years ago.

This was them and report of data.
2.jpg1.jpg3.png

That's just flow rate. There's way more to it than that.

[KalCorp]

Just a FYI i did make some changes after i posted this.

System General Fuel System Volt Min 12.5 to 14

A scan shows that Fuel Pressure (SAE) is better but not 100%
Now if better injectors and fuel pump will make more i will look into it. but nice to get it stable first. So this is a start. will still try to get good WOT log soon.


fuelPSI-2.jpg

[blindsquirrel]

Just about every calculation that the ECM has to do starts with what's in the injector data tables, which are no longer correct for the ones being used.

[edcmat-l1]

Just a FYI i did make some changes after i posted this.

System General Fuel System Volt Min 12.5 to 14

A scan shows that Fuel Pressure (SAE) is stable at 6krpm+ around 60
Now if better injectors and fuel pump will make more i will look into it. but nice to get it stable first. So this is a start. will still try to get good WOT log soon.
Maybe i should bring it up to 15volts?

fuelPSI-2.jpg

Yeah, I don't think it works that way. It's not a boost a pump. Setting that table to 14 does not mean you're applying 14 volts to the pump.

[KalCorp]

Yeah, I don't think it works that way. It's not a boost a pump. Setting that table to 14 does not mean you're applying 14 volts to the pump.

Info from web said this is how you do it on the Camaro i have. So far its working alot better. PSI is so much more than before.

Just about every calculation that the ECM has to do starts with what's in the injector data tables, which are no longer correct for the ones being used.

understand, next thing i am going to look into. But no longer correct? more like was never correct maybe?

[kevin87turbot]

I've not had a problem with the FAST 85's but they are not my first choice either. I wouldn't buy them for a build.

Having said that I've used ID 850 data for them and it has worked out seemingly OK. I have been ASSuming that bosch only makes a handful of injectors and these companies are just rebranding them/ flow matching them/ mismatching parts/ etc. So then data from one place should be close for all of them.. close enough. This is all a guess and it doesn't have to be.. plenty of good injector companies that offer data for what they are selling.

Is there any proof that they are drilled or decapped. They definitely don't act like decapped injectors.

That was a good guess Alvin. I worked at FAST for over 23 years before I began my full-time tuning career. I was there back in the day when it was still FP Electronics.

I can confirm that the 30857-8 injectors would be comparable to the FIC 850 decapped LS3 injectors. The FIC data will work nicely.

[KalCorp]

Before i make any changes to the Injector settings. I will do another log now that Fuel PSI looks more stable.


And from what i can see my flow rate was been chagned from stock when TT where setup.

Stock
flow-stock.jpg

Current
flow-current.jpg


FYI, I also turned off Enrich Desoot mode the other day. i hope that was correct and not needed.

[GHuggins]

Info from web said this is how you do it on the Camaro i have. So far its working alot better. PSI is so much more than before.

It's only going to put out what the alternator is capable of producing. Most top notch alternators will do 14.4ish tops whilst the majority only do 13.4ish... Not to mention it's going to stress some things.

understand, next thing i am going to look into. But no longer correct? more like was never correct maybe?

[KalCorp]

I can confirm that the 30857-8 injectors would be comparable to the FIC 850 decapped LS3 injectors. The FIC data will work nicely.

How would i get the FIC data for 850 decapped LS3 injectors ?

It's only going to put out what the alternator is capable of producing. Most top notch alternators will do 14.4ish tops whilst the majority only do 13.4ish... Not to mention it's going to stress some things.

Generator output on my car will set targeted generator output voltage between 13.9–15.5 V, depending on the battery state of charge and estimated battery temperature.
I could also get a Fuel Pump booster kit that goes up to 17v which is the maximum for my stock pump and factory fuel pump controller.
I will leave it at 14 now since its stable and no issues like it does at 12.5. as for stress i think i am way over that for most stuff anyway :-) But thanks for the feedback