I have now driven my newly modded car hundreds of miles since I got it back from Champion Motorsports last week and I have some impressions. My drives included about 150 miles going far out in Long Island during a work day, a 150 mile drive on Saturday as part of AMG of the Northeast's AC Poker Run exotic car rally and a series of highway pulls against modded GTRs.

Overall, the addition of the GIAC Stage 2 Plus, Champion intercoolers and Tubi catless race exhaust really changes the character of the car. The throttle smoothness and tip in point are unchanged from GIAC Stage 2.

It is no so different than Europipe levels of noise on normal during highway cruising but is a much wilder and louder when you are hitting it on sport or sport plus.

If you are on it especially in sport and sport plus you hear the turbos spool. You hear the wastegate. The exhaust noise is a lot louder. In short, the car comes alive. Also, the feeling of acceleration especially when already going fast is much greater than GIAC Stage 2 with stock intercoolers.

Oh and the best part. In sport and sport plus the car literally pops and backfires with rifle shot loudness when you back off the throttle after being on it hard. And you see flames in the exhaust during shifts or when you back off a hard throttle on sport and sport plus.

The car is a LOT faster in a roll race than before. I got a chance to do three hard highway pulls against a GTR with pull bolt ons using pump gas and destroyed it. The car did lose to a GTR with full bolt ons that was running E85 and probably putting close to 700 bhp to the wheels. In that run I had a passenger which did not help my car's performance but even empty I believe the E85 GTR would have beat my car. My car was on a mix pf 92 and 93 octang.

So my verdict is that while the numbers at events will give a more concrete answer the car feels a lot faster and more consistent.

 

Thanks for the update. Wish you were on the west coast so we could measure the difference heads up.

 

Me too believe me. Family obligations force me to stay in New York but have always wanted to move to California

 

I will say this. The biggest thought that keeps coming into my head with Tubi catless race exhaust is why didn't I do this sooner. It is definitely livable and bearable in normal while doing regular highway cruising. You can still hear the stereo and carry on a phone conversation. But on the other hand if you want the car to be a wild animal it will be if you hit the throttle hard and you're in sport or sport plus. That is thrilling in a way I have not experienced before. The car is just raw and uncorked and wild. The popping/backfiring is so loud.

 

This thread it's worthless w/o videos

Just kidding, nice write up... But next time put a GO PRO in your car

 

After 2 weeks and yesterday at Sebring, i concur with SDG.
Tubi catless is definitely a unique sound experience!

 

There was a professional photographer/videographer at the meet. Videos will be out shortly.

 

The photographer posted one teaser shot of my car from the meet. He is working on the videos.

 

SDG , get some H&R lowering springs. 30mm lower looks great.

 

If I lived in Florida sure. But in New York City never. Don't want to rip out the bottom of my car. With our god awful roads and my 15° approach angle driveway I need all the ride height I can get LOL

 

Just dropped my car at the shop for the IC/stage 2+ and TechArt springs.

Can't wait to get her back tomorrow and feel the difference!

Hopefully I can get out to the drag strip soon and get some slips.

 

That is exciting. Feels a lot more powerful than Stage 2 in all parts of the rev range

 

IF you can quantify it...how much would u say (seat of the butt meter) is due to the change in exhaust and how much due to the tune and IC's? the fact that u didnt track it or do repeated pulls....how much a factor did the tune and ic play in your experience...

thanks

 

The best I can do is refer to the Dyno results:

1. 550 bhp and 559 lbs ft with the Europipe exhaust with 100 cell cats

2. 566 bhp and 577 lbs ft with the Tubi catless race exhaust

 

I have had Stage 2 and tubi Exhaust since i think jan.
So, i tell you there is definitely more power in the upper RPM range.
it feels more free and natural now!

SDG, Yes i know NYC roads are worse then most third world countries.