[ZachU]

Originally Posted by Eldi Z

Thanks for the information Cjperformance and ZchU about your experience with the PC Canned (S**t) tune. Bottom line: Never use canned tunes, only dedicated ones which are written by a tuner on your engine - probably no way around it.

Seems like the P1X with the Stg.2 FMIC + LT4 fueling + Professional Tune, is the right way to go for a fun street car.

One more question: What is the advantage of using a 3 Bar MAP ? Why is a breakout harness necessary ?
I am learning a lot here... :-)

CJ covered it. My desire to have my Guage read boost properly induced me to learn about the 3 bar sensor. That being said, I am still learning and watching videos since I'm new to having a boosted car. The baro breakout made sense to install after watching the baro reading without it.

It's awesome to have people on here willing to help.

[wnta1ss]

Originally Posted by cjperformance

Two, the car, on the same track, was previously in the 12.6@113 (12.4@114 corrected) ET range, so getting an 11.9@117 (11.7@120 corrected) ET is a huge improvement.

Good, you have some real data from racing the car in stock and now modded form. Gained something, but it should be faster than it is. Now begins the figuring out why. Have you bought HP Tuners so that you can log what's happening and read the existing tune?

[KingLT1]

Originally Posted by cjperformance

I think you only need LT4 fueling above 580 RWHP, but a good idea if you plan on going over that at any point. More specifically, my understanding is if your injector pulse width is over 5ms.

1 Bar = around 14.7 psi, which is also atmospheric pressure, so a 1 Bar can not measure boost. For example 7 psi of boost is actually 21.7 psi (14.7 ambient + 7 psi boost) or 1.5 bar. Basically the tunes that dont use a 3 bar are fudging the values, or faking it. That's my technical explanation.... just faking it. I'll explain more when I understand it myself.

The breakout allows you to measure atmospheric pressure outside the pressurized intake tract by adding in another map sensor. One outside the pressurized intake tract to measure atmospheric pressure, usually your old 1 bar, and another (usually the 3 bar) to measure boost (or vacuum for that matter) in the intake. This allows correct calculation of the pressure ratio which is dividing the intake pressure by the ambient pressure (or vice versa maybe).

For example, 21.7 intake press / 14.7 atmospheric = 1.47 pressure ratio, which affects VVE table calculations (or lookups....) . Again, at least that's my understanding. If I'm wrong, please correct me

Injectors can be higher then 5ms. 6.2ms is about max peak. I try to keep them < 6.0ms sustained in PE mode. Anybody going FI should at minimum get the LT4 fuel system, install a flex fuel sensor, and run a blend of Ethanol. A lot of power to be gained being able to go from 12 degrees of timing to 17+. Let a lone the cylinder cooling you get from Ethanol which will help keep those piston rings butting from high cylinder temps.

[danhr]

Originally Posted by KingLT1

Injectors can be higher then 5ms. 6.2ms is about max peak. I try to keep them < 6.0ms sustained in PE mode. Anybody going FI should at minimum get the LT4 fuel system, install a flex fuel sensor, and run a blend of Ethanol. A lot of power to be gained being able to go from 12 degrees of timing to 17+. Let a lone the cylinder cooling you get from Ethanol which will help keep those piston rings butting from high cylinder temps.

or Meth.

[cjperformance]

Originally Posted by danhr

or Meth.

E85 or whatever ratio (E60 etc...) burns at a lower AFR... meaning ideal/stoich is numerically lower (12:1/10:1/etc...) and cools the actual cyl by that function.

My impression was that meth will cool your intake charge temp, but actually increase cyl temp. Again my disclaimer... please correct me if I'm wrong.

[danhr]

Originally Posted by cjperformance

E85 or whatever ratio (E60 etc...) burns at a lower AFR... meaning ideal/stoich is numerically lower (12:1/10:1/etc...) and cools the actual cyl by that function.

My impression was that meth will cool your intake charge temp, but actually increase cyl temp. Again my disclaimer... please correct me if I'm wrong.

methanol/e85 burn at a slower rate. resulting in lower cylinder temps.

pour some methanol on the ground and light it on fire

pour some e85 on the ground and light it on fire

now pour some 93 on the ground (step back) and light it on fire

if you want to continue the experiment, try 87.


the idea is to add octane. more octane means more timing. more timing is more power. more power is more smiles

[Crush365]

Just ran my 2019 Camaro procharged on Friday at Summit Motorsports Park in Norwalk, Ohio.

D1sc, stainless works headers, 3" exhaust, Lt4 injectors/pumps, tune, weld wheels with 305-45-17's

11.47 at 123; and
11.27 at 126 (video below)



I believe the car has a little more in it. IAT's were a little high and I launched from idle. I think if I brought the rpms up a little at the line, it would have done slightly better

[cjperformance]

Originally Posted by Crush365

Just ran my 2019 Camaro procharged on Friday at Summit Motorsports Park in Norwalk, Ohio.

D1sc, stainless works headers, 3" exhaust, Lt4 injectors/pumps, tune, weld wheels with 305-45-17's

11.47 at 123; and
11.27 at 126 (video below)



I believe the car has a little more in it. IAT's were a little high and I launched from idle. I think if I brought the rpms up a little at the line, it would have done slightly better

Very nice!

Were you running a canned tune, or custom tune? I would assume custom, but thought I should ask anyway.

[Crush365]

cjperformance - my car is fully dyno tuned by Hutter Performance in Chardon, Ohio

[grampa_ss]

Originally Posted by Crush365

cjperformance - my car is fully dyno tuned by Hutter Performance in Chardon, Ohio

Numbers?

[Crush365]

560 rwhp/497 rwtq

[ZachU]

Originally Posted by Crush365

Just ran my 2019 Camaro procharged on Friday at Summit Motorsports Park in Norwalk, Ohio.

D1sc, stainless works headers, 3" exhaust, Lt4 injectors/pumps, tune, weld wheels with 305-45-17's

11.47 at 123; and
11.27 at 126 (video below)



I believe the car has a little more in it. IAT's were a little high and I launched from idle. I think if I brought the rpms up a little at the line, it would have done slightly better

Awesome video and run! Thanks for sharing that.

[Crush365]

Here is the 11.47 run

car was hot - just drove it to the track - IAT's were through the roof

[KingLT1]

Originally Posted by danhr

methanol/e85 burn at a slower rate. resulting in lower cylinder temps.

pour some methanol on the ground and light it on fire

pour some e85 on the ground and light it on fire

now pour some 93 on the ground (step back) and light it on fire

if you want to continue the experiment, try 87.


the idea is to add octane. more octane means more timing. more timing is more power. more power is more smiles

My understanding is Methanol injection sprayed front of throttle body does not produce the same cooling effect in the cylinder during combustion as Ethanol injected at 2000+ psi.

Mike AKA toohighpsi had some good data on the subject posted a while back.