what do you guys think of dynomax cat back system? - Chevy Impala SS Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 11 (permalink) Old 03-13-2007, 05:56 PM
chris joyce
Guest
 
Posts: n/a
Post

Has anybody ever used the dynomax ultra flow Cat Back system on their caddy? Anybody know how loud they are and if their worth it? I am going to buy a cat back system, but I want loud and want it to give me more power. Right now I have headers, gutted cats, and redneck glasspacks and no resonators. that equals zero back pressure. I need to have more back pressure b/c I feel I am loosing some torque! Here is the link for the system I am looking at.

http://store.summitracing.com/partde...5&autoview=sku
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old 03-13-2007, 09:17 PM
94fleet
Guest
 
Posts: n/a
Post

I have no cats, everything past the stock manifold is 2.5 plumbing which is mandrel bent from Rock Auto, and Flowmasters i think they are series 40's, no resonators either. I like it during idle and WOT at 65 mph with stock tune/2.93's, but I would go with something different if I did it over again. I mean its nice, but really I dont know I just cant decide.
post #3 of 11 (permalink) Old 03-13-2007, 09:38 PM
edy923
Guest
 
Posts: n/a
Post

I didn't know they made pipes like that. I bought the dynomax pipes and used hooker aerochmber mufflers... But I have cats know and the turbo makes it kinda quiet too...
 
post #4 of 11 (permalink) Old 03-13-2007, 09:46 PM
garyreas
Guest
 
Posts: n/a
Post

Chris--On my SS, I have the Ultra Flo mufflers w/cats and H-pipe, but no resonators. Had it custom bent by a good local shop used by most of us NASSA members. Probably similar to the kit you're looking at, but not mandrel bent. It's not loud compared to many of the mufflers out there, but it was louder than I wanted on my Fleetwood, so I used the same setup, except I switched to Dynomax Hemi Super Turbo mufflers. Much quieter, and still seems to flow pretty well. On the loudness scale, I'd say it's slightly louder than the stock SS was. Not noticable in cruise mode, but can be heard just a bit when accelerating. The Ultra Flo, on the other hand, can be heard when cruising and is quite obvious when under load.
Hope that helps.
Gary
post #5 of 11 (permalink) Old 03-14-2007, 04:03 AM
MrCadillac
Guest
 
Posts: n/a
Post

if your going from a stock pipes with glasspacks, to a full 2.5" catback, I fail to see how you will be adding backpressure.

I did the same thing on my caddy, only instead of glass packs it was just a 2.5" bit of pipe to the stock tails. I can say the car felt more powerful with the catback, but I don't think it was from MORE back pressure, because even at the top even, it felt more powerfull.

Gotta remember, that the stock tails are only a crush bent 2". I wonder how it would feel if you cut it right after the glasspacks and drove it that way for a day. Just to see how even less back pressure felt. Just a thought. [img]smile.gif[/img]
post #6 of 11 (permalink) Old 03-14-2007, 01:48 PM
kennycanniff
Guest
 
Posts: n/a
Post

Quote:
Originally posted by chris joyce:
Has anybody ever used the dynomax ultra flow Cat Back system on their caddy? Anybody know how loud they are and if their worth it? I am going to buy a cat back system, but I want loud and want it to give me more power. Right now I have headers, gutted cats, and redneck glasspacks and no resonators. that equals zero back pressure. I need to have more back pressure b/c I feel I am loosing some torque! Here is the link for the system I am looking at.

http://store.summitracing.com/partde...5&autoview=sku
First; that is the right part number but the wrong picture .. your system will not look like This




The DynoMax is a very nice fitting cat back ,,, the best out there .. it fits perfect .. It will give you lots of sound but not much in the back pressure department.. What I did on my car to get a little back pressure was to stay with the stock front pipes and the stock tail pipes with the resonators and just went with 2 DynoMax ultra flow 17288 mufflers . I had to cut the hangers off the stock mufflers and weld them on the new Ultra Flows and use adapters for the front and rear pipes .. that did the trick very nicely .. The 2Ē tail pipes did tone the sound down .. but thatís what I wanted .. It still has a nice tone and gets pretty aggressive when you get on it but at idle itís a little loader then stock. Itíll save you $200.00 too up to you .. either way , good choice.

Kenny
post #7 of 11 (permalink) Old 03-14-2007, 04:52 PM
chris joyce
Guest
 
Posts: n/a
Post

Thanks for the input guys! I think im going to go with the ultra flow system since it seems to be getting good reviews. After my exhaust im going to be installing the eaton ltd slip and 3.73's, and the pcm tune! What do you think my quarter mile time will be after all of that stuff plus my current mods? Im thinking high 13's/low 14's, and I don't really weigh my car down seeing im only 130lbs.
post #8 of 11 (permalink) Old 03-14-2007, 04:54 PM
chris joyce
Guest
 
Posts: n/a
Post

.
post #9 of 11 (permalink) Old 03-14-2007, 07:00 PM
94fleet
Guest
 
Posts: n/a
Post

Chris: Awesome, im about 135 too!

Kenny: Im assuming you have the mufflers installed on the LT1 Fleetwood, not the 93? I'll have to listen to it next time we meet up, My Flowmasters are both offset, I origionally had Summit Turbo's to install, BUT the exhaust shop said they couldnt use them with the Dynomax pipes, they showed me, they said they could make it work but it wouldnt look pretty, and wouldnt help performance...
post #10 of 11 (permalink) Old 03-15-2007, 09:30 AM
yellowtaws6
Guest
 
Posts: n/a
Post

You should break into the high 13s!

You guys checked your BMI yet.. don't want to be too skinny
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevy Impala SS Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome