So I decided to make use of my day off and took the car back out to Corvettes of Dallas this morning for a couple of dyno pulls to see what my Crawford High-Flow Cats and HR Y-pipe gained for me. The results were way beyond what I was expecting.

I gained 18HP and 11ft-lbs to the wheels. All I added since the previous dyno at that location was the Crawford cats and the HR Y-pipe, that's it!

I am very satisfied with my results, and it just goes to show how restrictive the stock cats are. I would definitely recommend the crawford cats. I wish I took the time and money to see how much power the HR y-pipe alone would have gained for me if anything, but oh well.

 

Woohoo, congrats! Now if I only had a 48" computer monitor I could see your dyno graph all at the same time! :P

 

lol! sorry for the large pics, i'm lazy, its my week off from work! its resized now.

 

very impressive man!

 

Oh NICE.. Wonder how much mine is now that I'm done w/ my air mods..

 

oh..oh...I better step it up again before big D catches up...well since I now have the plenum spacer...wonder what gain I got..now I just need bling for some hfc's..

 

sounds like a dumb question, but would hfc's help with sc?

 

YUP.. that fits before your exhaust system... More air in (SC) more air out (HFCs + exhaust).

 

Abso-dang-lutely! In fact, the less restrictive your exhaust is, lower boost will be required to produce the same horsepower you achieve today.

The problem with making any changes like this when you have a SC, you may need to get re-tuned =/

 

That's awesome Dominic!
I need to put my Kinetix on and re-tune.
Kind of scared about the sound. Have heard a couple dousys from BlueBob and VicariousVision.

 

I've been running Kinetix HFC's for 22k miles with Injen SES and still love it to this day! Never had a problem with my Kinetix like some have had

 

Domenic check the spotted thread.

 

Hey dom, you're running factory exhaust other than the y and cats?

18/11 gain is freak'in awesome! (crawford cats...hmmm and i was going to buy silly stereo stuff)

 

Yes sir, all factory exhaust except for the cats and y-pipe, although technically the y-pipe qualifies as "OEM", its just off the 350ZHR motor?!?!?

 

Where did you get the cats?