Damage Inc.

iTrader: (7)

I have Kooks headers, catted Y pipe, and Corsa now and I'm thinking about getting a 3" X pipe, 18" Sweet Thunders, and dumping it before the axle. Will I lose a lot of low end torque by doing this? Is it worth the swap for a H/C car? Thanks a lot.

Trans Am WS6 RGS

If you do lose any it probably wont be seat of the pants noticeable.

On my car (with the cam) I do feel a little less "grunt" down low but nothing major. I do however feel a huge difference up high. Once past 4000rpms it seems to get an extra kick.

There's a guy here on the site (Local to San Diego) that has Sweet-Thunder dumping before the axle. I heard it in person and it sounded pretty good.

matts22

iTrader: (2)

I thought that true duals with an x-pipe increased low end torque? Someone correct me if I'm wrong. I still have no clue what I am going to do about exhaust when the time comes (money wise).

Damage Inc.

iTrader: (7)

The only reason for my asking is that when I installed the headers, the catback slipped out of the I pipe just over the axle and I never realied it. I just thought the headers made the car that much louder? I took the car for a rip and it felt sluggish, but the top end was stronder. I said, "Oh well, you win some and lose some?"

The next day I had the car in the air and reaized the catback was off. I put it back on and tightened the sh*@ out of it and went out. The car was snappy as Hell! The lowend torque was amazing. I just don't want to be sluggish down low again. Ya know?

matts22

iTrader: (2)

Yeah, but the catback coming loose is probably different from the true dual setup. It is the x-pipe setup in the true duals that provides the scavenging effect. This improves the torque curve (moving it down lower?). So I would assume that you will have that torque and then some with the true duals. Just my guess (no experience with true duals on an f-body though).

Trans Am WS6 RGS

The guys screen name who has Sweet Thunder mufflers dumped before the axle is LeddySS98 . Shoot him a PM and I'm sure he wouldn tmind answering some questions for you.

I went from a LM y-pipe set up and didnt feel a loss of low end torque. My buttometer is not very sensitve though. :shrug: My slight loss of low end is due more to the cam than the exhaust set up.

luv2spd

iTrader: (1)

Yes a big cam will definately lose some in the low rpm like up to 1500 or so, but the exhaust change prob. won't cause a noticeable loss.

ls1fbod

I think i lost low end grunt now that i think about it...But then again i never noticed it, so it shouldn't matter....

Damage Inc.

iTrader: (7)

So you think it would be worth the swap? I just don't want it to be TOO LOUD! Ha. With the corsa, I can chill and be stealthy somewhat, until you get on it that is. I hope I can still do that with duals.


RGS - Thanks I'll PM him. Let me know if you want to check out the Corsa or need pics.

ls1_doc

iTrader: (6)

I went from a "flow"master to true duals and the increase i got all around was great. I noticed more low end torque then before and the sound is awesome. Not real stealthy though

Worm

iTrader: (2)

I doubt you'll notice it. It will have more top end though.

gettinthere

iTrader: (3)

Just do it. After you replace those bearings, the sweet thunders will help. You know you're gonna end up doing it anyways, so why even ask?

Matt D

iTrader: (49)

i would say do it too...talk to nbm2001z28 about his duals

NLang

iTrader: (12)

You will gain torque with an X-pipe system, no loss...

Damage Inc.

iTrader: (7)

No kiddin'? Well, anyone want to buy my Kooks/Cats/and Corsa! PM me if you're interested. It's mint. Ask the guys in Midwestern, they'll vouch for it. How about it guys?

I'll make a post in the Midwestern Section.

NLang

iTrader: (12)

I can attest for even more of an extremity...I went from 2.5-3" dual and only lost around 4ft/lbs @ 1500rpm over the 2.5" setup. This was without a cam. 3" would never really be needed on a 346 unless you cruized around @ redline, but it's something to chew on...

dug

iTrader: (10)

I saw a dyno comparison of macs with 2.5" ypipe compared to 3" true duals. The duals made more torque down low. The ypipe eventually caught up to the duals as the rpms increased. The duals definitly made more midrange torque.

gettinthere

iTrader: (3)

I'd be surprised if there was even a fingerprint on this stuff.

Damage Inc.

iTrader: (7)

So you're saying that 3" duals may be overkill. What about on a H/C 90mm car? I was going to go with 3"?

NLang

iTrader: (12)

Not exactly overkill as your top-end may like it. It depends on how much time you spend under 2000 (never with a big cam...). Mine was accompanied with Flowmaster's new Super40's. Seems to be perfect-Cut-outs yielded only 2rwhp over the full to-the-rear system, even with all its 90*+ bends...It's the best sound (by a long-shot) that I've heard. But, I hope you're a big fabricator...It's no easy task routing two 3" pipes around everything and over the axle with all the brake lines and wiring. Do-able, but not easy.