CG Precision DS-1 Catted Downpipe Only Log Review + Dragy

[B58_ hwAyaq]

UPDATE: There was a little mix up in flash files, and these logs are for a stock tune with the CG Precision DS-1 Catted Downpipe only. (Dragy gains)

Just flashed a Visconti Stage 2 93 Octane OTS tune via Ecutek PhoneFlash on my. I have a bench unlocked 2020. Only hardware mod is a CG Precision DS-1 5-inch Catted Downpipe.

Everything feels good, sounds good, and the car pulls very smoothly. With that said, I think it's smart to run some logs and take a look before concluding all is safe.

I was hoping to get input from the community on how my logs look. Before someone tells me to send it to the tuner, I think there's value in discussing this publicly so we can all learn what good/bad logs like, etc.

4th Gear Run 1 - CG Catted Downpipe Only Run 1 4th Gear Public
4th Gear Run 2 - CG Catted Downpipe Only Run 2 4th Gear Public
WOT 2-4 Run 5 - CG Catted Downpipe Only Run 5 WOT 2-4 Public
WOT 2-4 Run 6 - CG Catted Downpipe Only WOT 2-4 Public

Based on some light research, I think that everything looks good. I'm not seeing crazy trim values, I'm not seeing any knock, boost error seems reasonable, and timing steadily increases throughout the pull (by gear).

It appears there were some timing corrections in 4th or 5th on the 2nd-4th gear pulls. Not sure if what I'm seeing there is unreasonable.

Any input is greatly appreciated. Once this is squared away, I'm going to get some Dragy runs in to get a clean comparison of stock vs. CG Catted Downpipe Only stage 2 OTS in 60-130, 1/4 mile, etc.

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[zrk]

Conservative tune. No knock to speak of, timing looks good. You're over-boosting a bit.

 

[B58_ hwAyaq]

Conservative tune. No knock to speak of, timing looks good. You're over-boosting a bit.

I appreciate the validation. Are the overboost levels concerning? I imagine it's still within the safe limits of the engine. If this were your log, what would you do with the over-boost info?

 

[zrk]

I appreciate the validation. Are the overboost levels concerning? I imagine it's still within the safe limits of the engine. If this were your log, what would you do with the over-boost info?

It’s a couple lbs, not enough to retard timing. I can look again in the morning. Honestly, if it was my log, id pay the $$ for a custom tune to get it dialed. Is it gonna hurt anything? Doesn’t look like it. Still conservative boost. It’s enough where I might check for a boost leak. No charge pipe, right?

 

[B58_ hwAyaq]

It’s a couple lbs, not enough to retard timing. I can look again in the morning. Honestly, if it was my log, id pay the $$ for a custom tune to get it dialed. Is it gonna hurt anything? Doesn’t look like it. Still conservative boost. It’s enough where I might check for a boost leak. No charge pipe, right?

No charge pipe, just the downpipe. Everything else is stock hardware. I planned on going custom with flex fuel using this OTS as a stop gap given its marginal cost above and beyond the Ecutek package.

I’m in FL, and it was pretty warm today if that could affect it.

 

[visconti]

Let me know when youre ready

 

[B58_ hwAyaq]

UPDATE: There was a little mix up in flash files and these logs are for a stock tune with the CG Precision DS-1 Catted Downpipe only. (updated the original post)

Also note that the overboost identified in an earlier post now makes sense given the less restrictive downpipe without the tune to compensate.

I'll share my dragy gains for the downpipe only shortly and the actual OTS Stage 2 logs and dragy gains soon.

 

[zrk]

UPDATE: There was a little mix up in flash files and these logs are for a stock tune with the CG Precision DS-1 Catted Downpipe only. (updated the original post)

Also note that the overboost identified in an earlier post now makes sense given the less restrictive downpipe without the tune to compensate.

I'll share my dragy gains for the downpipe only shortly and the actual OTS Stage 2 logs and dragy gains soon.

Sounds good.

 

[B58_ hwAyaq]

Downpipe only dragy runs below.

Stock dragy runs: https://www.supramkv.com/threads/slow-stock-60-130-times.12581/

Comparable DA (~500ft difference) with Michelin PSS on the street.

Stock 1/4: 12.57 at 110.56
Downpipe only 1/4: 12.61 at 111.20
Gain: + .64 mph
*Wasn't looking to continue launching to cut 0-60 given this is on the street. I was focused on trap.

Stock 60-130: 14.06
Downpipe only 60-130: 13.52
Gain: -.54s

Conclusion: Nice improvement in sound. Barely noticeable power gain with the butt dyno, and minor objective gains in performance.

I'm OTS Stage 2 now, so I'll share dragy results soon.

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