Ali_E55

Speechless

direct no cats

turbo sound is louder and better

exhuast note at muffler is bout 30% louder @ WOT but from inside the car it is almost like stock. no noise at all

NOW i need a tune for CEL and more boost

hyperion667

have any video?

oliver@velosdesignwerks.com

LOoks good. We just completed a CLS63 stateside with downpipes and Resonator by pass. Sounds mean. I will try to share the vid later today or early next week.

oliver@velosdesignwerks.com

Update: Check out our facebook page for a Iphone Vid the guys took of it two nights ago... Will get better Audio next week.

Ready2roll

Dude that's awesome! Vtech's stage 2 tune is for exhaust mods and CEL is turned off. I may be going this route on my car also

justthebest

Awesomeness.

pteteh791

Dude that's awesome! Vtech's stage 2 tune is for exhaust mods and CEL is turned off. I may be going this route on my car also

Ali_E55

here are some videos


http://www.youtube.com/watch?v=1ou060vx-ag


http://www.youtube.com/watch?v=20nZxaXSoDQ

_AMG_

Sounds great! Would you happen to have any vids next to the mufflers?
I bet the turbo spool sounds awesome!

turbotom1

I'm considering this mod but don't actually know if it increases hp at all.
Did you dyno the car before and after cat delete.
Would you offer your impression if car feels much stronger ?

callmiro

Just a question....

Is the tune going to be that much more different than a stage 1 tune

By uncorking the exhaust you're allowing the turbos to spin more free thus allowing the turbos to work more efficiently

Won't the stage 1 tune compensate for that?

Just askin....

Ready2roll

from what I understand removing the cats is only good for around 6 RWHP, but the turbo's do spin up a bit quicker. Vtech told me that they change the fueling up a bit in their Stage 2 tune and also CEL light is turned off for cars with exhaust mods. Stage 1 will compensate, but you may have the issue with CEL as Ali is seeing now with his stock tune.

I'm real interested in Ali's results, particularly if he goes with the Vtech stage 2 tune as this is the route I want to take with my car. It would be real interesting to compare his stage 2 with exhaust mods results to my bone stock with stage 1 tuning.

I really need to get my car to a track soon. I'm thinking low 11's won't be a problem

Ali_E55

turbo spool sounds al lot louder and better.

i didn't try with one of my friends to see the diffrence at least in performance.

but if it is true that deleting cats are giving 6RWHP, i would rather to but them back.

i can feel it is pulling stronger, but i have to try it by compairing with one of my friends that i tried with before.

Ali_E55

i feel it is faster, but maybe because the sound from exhuast is louder.

i didn't dyno the car

any deleting in cats for a FI car will sure make some power.

infact, i saw the stock cats, they were short and either 300 or 400 cell.

they are not restrictive as 55k cats.

Ready2roll

Ali the 6hp could just be a myth?
One would think you would gain far more by removing the cats.

Do you have access to a dyno?

I'm anxious to see how you run against your friend

Ali_E55

i can see my car is runing richer now, AFR dropped .5 after i removed my cats.

callmiro

Sounds awesome!!!!

Have you done a dyno pull?

1995E320Cab

On V12TT cars removing the cats does not do much for peak HP / TQ but has good gains (30 hp range) under the curve where its more important. Want even more ? Do a full 3" exaust !

Ali_E55

30hp are nice,

i did downpipe catless 2.75" same size as stock

KEMA

Which would be considered the most restrictive in terms of releasing air flow to the turbos? The Cat or the Resonator?

I'm still not decided if I will go with straight pipes or keep either the Cat or Resonator.

Ken

Vic55

Cats restrict more... resonator is more of sound deadening device.

If you drop the cell count in the cats on a turbo you will get more air and you should get more power.

elijah

It sounds beautiful. What an incredible engine you guys have under the hood!!

xpl0sive

you post a lot of videos, which is great, but can you please spare a couple hundred $$$ and buy a new camera. your videos look like you filmed them with a toaster

Ali_E55

most of them by cell phone, i don't expect to find lots of cars to race.

Rob@vividracing

In Abu Dhabi. I thought everyone raced there.