Almost ready for the DDM S/C but a few more questions...

domer3001 · 02-15-2008, 06:58 PM

OK, I am finally close to making the move to the Super Charger and have a few more questions.

1. How much power is lost if I don't switch out the stock header? Long or Short tube?
2. Then if I replace it will the stock CAT still work or do I need to switch that out?
3. How much power is lost/not gained if I don't switch to a hi-flow CAT?
4. Will I still pass inspection with the new header and high flow CAT?
5. Sound?? I currently have the GM CAI and I like the sound with my magna flow dual exit. Will the new set up be very loud or only when I step on it like now?
6. Will I be happy if I just put in the Stage 1 and leave the header and CAT Stock?

Sorry for all the questions but $3500 is a lot of money and I want to be happy with this.

Thanks

diamoney · 02-15-2008, 09:52 PM

Quote:

Originally Posted by domer3001

OK, I am finally close to making the move to the Super Charger and have a few more questions.

1. How much power is lost if I don't switch out the stock header? Long or Short tube?
2. Then if I replace it will the stock CAT still work or do I need to switch that out?
3. How much power is lost/not gained if I don't switch to a hi-flow CAT?
4. Will I still pass inspection with the new header and high flow CAT?
5. Sound?? I currently have the GM CAI and I like the sound with my magna flow dual exit. Will the new set up be very loud or only when I step on it like now?
6. Will I be happy if I just put in the Stage 1 and leave the header and CAT Stock?

Sorry for all the questions but $3500 is a lot of money and I want to be happy with this.

Thanks

I'll leave most of these questions to Randy and Dave.

Depending on your state inspection, you must remember that it is technically illegal to remove or replace your cat before 5 yr./50k mi. unless failure occurs. I am still running stock exhaust and you will truly believe that you are in a different ride than you had hours before!

Good questions, see you in the fast lane!

Critterman · 02-18-2008, 10:55 AM

I have a tri-y long tube header and highflow cat with the magnaflow single. It is LOUD! That is why I am switching to a solo exhaust after I install the stage II

V10Venom · 02-18-2008, 11:34 AM

Critterman, I'm running the same exhaust setup as you. I wanna help you out and not make you have to spend that money...when you say it's loud, do you mean loud or has a bad tone?? I had the same thing and it sounded horrible. It was raspy and just sounded ricey. I put in a resonator ($100) and it took away 100% of the raspiness. I don't think you need to waste the money and buy a whole new exhaust unless you really want the different exhaust.

Randy@ddmworks · 02-18-2008, 02:40 PM

Quote:

Originally Posted by domer3001

OK, I am finally close to making the move to the Super Charger and have a few more questions.

1. How much power is lost if I don't switch out the stock header? Long or Short tube?
2. Then if I replace it will the stock CAT still work or do I need to switch that out?
3. How much power is lost/not gained if I don't switch to a hi-flow CAT?
4. Will I still pass inspection with the new header and high flow CAT?
5. Sound?? I currently have the GM CAI and I like the sound with my magna flow dual exit. Will the new set up be very loud or only when I step on it like now?
6. Will I be happy if I just put in the Stage 1 and leave the header and CAT Stock?

Sorry for all the questions but $3500 is a lot of money and I want to be happy with this.

Thanks

Domer,

On a stage 1 system, it will be fine to run the stock setup(manifold & Cat)you said you have a magnaflow dual, you should be fine. The peak horsepower doesn't change much with the addition of the header/cat, but it shifts the power and you have more area "under the curve". The exhaust note will be about the same as your current setup, but you will here the S/C whine during WOT. I believe all of the 14 or 15 guys with the stage 1 kit are very happy. But when your ready for more, we already have a stage 2, nd by then maybe a stage 3....

The only shorty test to work with the DMMWorks S/C kit is the SOLO header, I believe all the long tube have been tested. Shorty keep the factory cat hook-up...long tube will require a new cat. As far as inspection, I don't know...every local/state is different. Here in SC, we don't have inspection anymore.

SCISOLSTICE · 02-18-2008, 02:52 PM

Quote:

Originally Posted by domer3001

OK, I am finally close to making the move to the Super Charger and have a few more questions.

1. How much power is lost if I don't switch out the stock header? Long or Short tube?
2. Then if I replace it will the stock CAT still work or do I need to switch that out?
3. How much power is lost/not gained if I don't switch to a hi-flow CAT?
4. Will I still pass inspection with the new header and high flow CAT?
5. Sound?? I currently have the GM CAI and I like the sound with my magna flow dual exit. Will the new set up be very loud or only when I step on it like now?
6. Will I be happy if I just put in the Stage 1 and leave the header and CAT Stock?

Sorry for all the questions but $3500 is a lot of money and I want to be happy with this.

Thanks

Most of the time. More noise means more horsepower.

Mr. Stone · 02-18-2008, 03:42 PM

Quote:

Originally Posted by SCISOLSTICE

Most of the time. More noise means more horsepower.

I'm not so sure about that...

Critterman · 02-18-2008, 06:58 PM

Quote:

Originally Posted by SolScuba

Critterman, I'm running the same exhaust setup as you. I wanna help you out and not make you have to spend that money...when you say it's loud, do you mean loud or has a bad tone?? I had the same thing and it sounded horrible. It was raspy and just sounded ricey. I put in a resonator ($100) and it took away 100% of the raspiness. I don't think you need to waste the money and buy a whole new exhaust unless you really want the different exhaust.

It is deep and loud gets raspy around 6k. Since I want the diffused centercut valance, I will go with the solo center exhaust as well, probly the quieter version, as the wife doesn't like to ride in the car anymore because of the sound.

V10Venom · 02-19-2008, 07:14 AM

Quote:

Originally Posted by Critterman

It is deep and loud gets raspy around 6k. Since I want the diffused centercut valance, I will go with the solo center exhaust as well, probly the quieter version, as the wife doesn't like to ride in the car anymore because of the sound.

I'm suprised it doesn't get raspy until then

Mine was raspy throughout the powerband. Within 4 days after getting the exhaust on I couldn't stand it anymore so I went and put a resonator in. I'm contemplating a second one to quiet it down since the first one was a flow through just meant to take away raspiness.

carlintexas · 02-19-2008, 07:39 AM

I am running a Random Tech high flow cat and Magnaflow cat-back single. I must be used to it - or don't drive it enough. Seems loud but tolerable & not so ricey. Of course, at my age the left ear doesn't listen as well as it used to.

But to the question at hand -

As a 'get er done' kind of guy, I'd be having Dave install stage II as quickly as the time it takes to drive to Piedmont, S.C.!

V10Venom · 02-19-2008, 08:24 AM

You also have a turbo Carl. Turbo's tend to quiet down engines quite a bit.

That's why you guys can run without mufflers. It will be loud as hell but usually not raspy too much.

Superchargers tend to just make things louder...

carlintexas · 02-19-2008, 11:16 AM

Quote:

You also have a turbo Carl. Turbo's tend to quiet down engines quite a bit.

That's why you guys can run without mufflers. It will be loud as hell but usually not raspy too much.

Superchargers tend to just make things louder...

So the template for a DDM stage II - and to still get good exhaust flow with a quieter tone..

Would be... ear plugs!

My Magnaflow was not so loud until I installed the high flow cat. - that got the decibel level up!

Randy would say - run Riken's and you won't be able to hear anything but the tires.

Critterman · 02-20-2008, 08:56 AM

Funny thing is the car is louder in the passenger seat than the driver's seat, radio as well.

Critterman · 02-20-2008, 08:57 AM

Quote:

Originally Posted by carlintexas

I am running a Random Tech high flow cat and Magnaflow cat-back single. I must be used to it - or don't drive it enough. Seems loud but tolerable & not so ricey. Of course, at my age the left ear doesn't listen as well as it used to.

But to the question at hand -

As a 'get er done' kind of guy, I'd be having Dave install stage II as quickly as the time it takes to drive to Piedmont, S.C.!

Switching sides?

diamoney · 02-20-2008, 08:58 AM

Quote:

Originally Posted by carlintexas

Randy would say - run Riken's and you won't be able to hear anything but the tires.

...and I agree!

It is truly amazing how much more tire noise I hear compared to the old Eagle F1s. I never drove the car with stock tires, so I cannot rate that difference.

For the price (and since I haven't had any incidences with them), I think the Rikens will prove to be decent enough for at least the one purchase!