Exhaust HP?

Topic: Exhaust HP? (Read 3477 times) previous topic - next topic

Exhaust HP?

January 23, 2008, 10:42:38 AM

My '86 TC has the stock [tiny] exhuast other than some very quiet glasspacks. What kind of numbers could I expect with a 3" DP to 2.5" duals with no cats or lers? Currently has about 200 hp at the wheels.

Exhaust HP?

Reply #1 – January 23, 2008, 12:57:04 PM

Quiet glasspacks? If there isn't an oxymoron...

Carry on...

Exhaust HP?

Reply #2 – January 23, 2008, 01:42:41 PM

You'd be surprised. My stock '87 was louder...

Exhaust HP?

Reply #3 – January 23, 2008, 01:49:03 PM

Loud....and annoying.

You'll see a minor change in power/tq, but you'll also see a difference (quicker) in spool time.

Exhaust HP?

Reply #4 – January 23, 2008, 02:48:19 PM

It'll feel faster. Actually it should be worth 10-15 hp.

Also, you might consider at least some sort of lers. Unless you like the sound of tractors.

Exhaust HP?

Reply #5 – January 23, 2008, 06:40:00 PM

I don't really mind the sound too much... I mean I want it to sound decent, but a 4 banger can only sound so good. Sound vs. power loss due to lers kills me though.

Exhaust HP?

Reply #6 – January 23, 2008, 06:53:34 PM

Quote from: tc²;199552

I don't really mind the sound too much... I mean I want it to sound decent, but a 4 banger can only sound so good. Sound vs. power loss due to lers kills me though.

It will sounds like ass, and you're not losing squat if you use the proper (read:straight-through) lers.

Exhaust HP?

Reply #7 – January 23, 2008, 11:15:54 PM

Something like this perhaps?

http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_17246_-1

Exhaust HP?

Reply #8 – January 24, 2008, 12:37:16 PM

I was thinking more of something like this

http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_744869_-1_10265

It's a non-stainless Ultraflo, which is straight-through.

But I don't see the offset/offset in 2-1/2". To avoid weirdness with tailpipes and alot of tweaking, you'll want to at the very least have an offset outlet. I guess if you're just having tailpipes made up it doesn't matter, but if you're using off-the-shelf pipes, most are made to work with offset outlets.

Exhaust HP?

Reply #9 – January 24, 2008, 01:23:14 PM

Race bullets don't really do any ling at all. I know this from experience.

FYI, Hooker Maximum Flow lers are cheaper than ultraflo's and the same design...also, someone recently posted up flow numbers from somewhere over on turboford, and a straight through 2 1/2" "big case" ler like an ultraflow or maximum flow was shown to flow almost as much air as a 2 1/2" straight pipe.

I have maximum flows on my car and I love them.

Exhaust HP?

Reply #10 – January 24, 2008, 01:40:50 PM

Thanks for the great info guys! Is a center in/dual out ler a bad idea? Something like this?

http://store.summitracing.com/partdetail.asp?autofilter=1&part=SUM%2D636842&N=700+4294923429+4294922711+4294922710+115&autoview=sku

Or

http://store.summitracing.com/partdetail.asp?autofilter=1&part=MPE%2D13288&N=700+4294923429+4294922711+4294922710+115&autoview=sku

Exhaust HP?

Reply #11 – January 24, 2008, 02:17:53 PM

That is not going to be easy to get 2 tailpipes to on a Fox car.

The Merkur guys use them alot, but they won't work well at all on a TBird.

Exhaust HP?

Reply #12 – January 24, 2008, 03:37:46 PM

yup, im with chuck. i run a round 6" ultraflow, but i dont use tailpipes; just a dump at the axle.

Exhaust HP?

Reply #13 – January 24, 2008, 03:59:17 PM

I think that's what I have under the Tbird, I had to tweak my tailpipe a bit as the ler is mounted at an angle due to the way the pipe crosses over under the car.

Exhaust HP?

Reply #14 – January 24, 2008, 05:40:36 PM

I run an offset/offset 3" UltraFlow, no cat or tailpipe, and its loud, but doesnt sound bad at all.