What or how much is "Noticible" horsepower?

What is the bare minimum you can actully feel? I'm guessing like 5 hp?

 

way too many variables imo...mostly depends on how much power your starting off with and whether or not you're used to the power that is already there... also where the power is in the powerband... *shrug*

 

Noticable hp is addding an underdrive crank pulley for $42.
Buy one and try it sometime, you might be plesantly surprised.

 

I have the underdrive crank and alternator pulleys.

 

Do you have the ASP Pulley or a different one?

 

115hp.


Approximately.

 

ASP. It should have been the most noticable gain off all off your listed modifications I see in you signature. And the cheapest.

 

noticeable Hp should be noticeable.

You should feel it in the seat of your pants.

A few times I have felt my car, surge like it had a turbo or something. But it was on a cold fall night in a strong head wind. I could feel the care surge with extra power.

Or kinda of like how you know when to shift on a dirt bike or other off road toy with no RPM gauge. You just know when to shift. You can fell the machine peak and it stop puling.


Probably easier for those use to riding something without a tach.
Especially 2 stroke bikes as they have a power band. You think your going fast, until your RPMs hit the sweet stop and you surge with power and then it peaks, you shift.

 

It was noticible but I'd say the most noticible of my mods was the dynomax catback.

 

Very often the louder noise will make you think your car is faster.
The stock muffler flows perfectly fine on a stock 2.8/3.1 motor. These motors do not have enough flow to restrict any muffler. It is all hype as to which muffler makes more power on a 60*V6, the only difference is what kind of noise they make.

The only car here hurting to breathe is Dowards. He's on the level of flow equal to the V8's. He would see the noticable restriction of maybe 2HP between the various types of mufflers availiable.

Noiw the stock catalytic convertor is a whole nother subject. Anyoner will see gains by putting any new catalytic convertor on there car. They are all considered "highflow" nowadays. They are made much better than the stock cats of the '80's.

 

The noise level mainly went up at idle and overdrive (Drone sounding). Thats about it.

 

Whats your e-mail? I send you a sound clip of my 2.8 on stock exhaust manifolds. I think it will surprise you how lively my little motor sounds. I havce never heard a 60*V6 in person that sounds as crisp- and I have heard many in real life, not just sound clips.

 

GopedVXWAR@yahoo.com

 

Are they very restrictive stock? Which would offer a bigger gain,high flow cat or crank pulley.

BTW-nice exhaust clip

 

I think the major exhaust restriction in these cars is not so much the cat or muffler, but the manifolds and tee connection where they go 2-1. Just putting a smooth transition "Y" in there would probably add more than removal of the cat and a high flow muffler. Now, if you need a new exhaust anyway it's not a bad notion to go with a high flow cat and a Dynomax or something afterword.

We recently bought a 3800 Series II powered Grand Prix GT, and I joined a GP board and asked about a cat back, and was suprised to hear that if I wanted more sound it was a fine idea but there was minimal if any power gain to be had back there, that the major restriction was before the cat on those cars. So I will keep my money for real gains, considering the $ a cat back is for that thing.

 

A high flow cat will show a gain above 4000 rpms only.
The crank pulley will show a gain across entire rpm range.

Combined together, they will allow you to rev higher and produce power up to about 46-4800 rpms on an stock motor.

Eric is correct also that the "t"-pipe is worth a gain also going to a true y-pipe.
Dollar for dollar, the crank pulley is still the best gain for the buck

I would equate all three mods to give equal gains in power but the crank pulley is cheapests, then the cat, and lastly the cost of headrs and a y-pipe (Unless you have the car taken to a muffler shop and a merged y colletor be fitted into the section of ehaust- but labor and materials is still going to be more expensive than the first two)

 

The Pacesetter guys said the y pipe that comes with the headers fits perfectly in to the stock cat.What fitment problems are you referring too with the headers?

 

If this question is directerd towards my last paragraph, then you need to please re-read what I wrote.

I said nothing about fitment problems of pacesetter headers.

What I did refer to was simply buying a 6" long 2 into 1 merged collector and having an exhaust shop cut out the original "t" conection on the factory y-pipe and replace that "T" section with the merged collector that is in the shape of a true "Y" rather than the stock "T"