How are these exhausts?

[bongchild]

So I was lookin around online last night and I happened across magnaflow's and flowmaster's websites. They seem to be a pretty cheap solution for my car. I' m mostly interested in their cats and mufflers... Does anyone have any experience with their products? Would you recommend them?

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[b_tapper]

I loved my magnoflow I had on my other rs lol

[Section 8]

DO you mean that they now make exhaust sections for our cars, or are you speaking specifically about the mufflers?

I had a series 30 deltaflow Flowmaster on my car. It was loud. THe muffler shop guy said that I had a catylist so it would not be loud. WRONG! It burbeled around like a V8 under 3000 RPM's though. After 3,000 RPM it got really loud.

Stick with a 40 series if you go with a Flowmaster. I think that a Flowmast sounds better than a Magnaflow. THe magna flow is more RRRRAAAAAAA, when high in the RPMs while the Flowmaster is still RRRRRRRRRRR. Of course sound is subjective, and things change with pipe diameter, headers, and who's cat you are running.

cheeRS,

Greg

[bongchild]

What I have in mind is a Magnaflow 5300 series (hi-flo?) cat, a custom 2" midpipe w/resonator, and a Flowmaster 60 series muffler. How does this setup sound to you? any suggestions/insights will be appreciated

[Kostamojen]

Originally posted by bongchild
What I have in mind is a Magnaflow 5300 series (hi-flo?) cat, a custom 2" midpipe w/resonator, and a Flowmaster 60 series muffler. How does this setup sound to you? any suggestions/insights will be appreciated

Sounds fine, maybe go with 2.25" since you will have a high flow cat in there.

[Section 8]

I would go with a 2.25 as well.

Greg

[bongchild]

Yeah? I've heard mixed reviews about going 2.25. lots of people say it's too big for the 1.8L and it'll rob me of my low-end. But then others say its fine..... Another thing, should I get a resonated midpipe? Does it affect anything other than noise?

[Nicklbrso]

I have a custom 2.25" pipe on my EJ18. No low end power was lost. Just have them put back on the resonator already on your car. It keeps the raspyness down.

[Section 8]

Originally posted by bongchild
Yeah? I've heard mixed reviews about going 2.25. lots of people say it's too big for the 1.8L and it'll rob me of my low-end. But then others say its fine..... Another thing, should I get a resonated midpipe? Does it affect anything other than noise?

Thats what I get for assuming a 2.5 liter.

I retract my previous statment, and decline to comment on it.

I don't know what diameter you should use, however using the recommended diameter for an engine that .7 liters larger sounds like a mistake.

cheeRS,

Greg

[bongchild]

Hey, thanks for the help guys. So, it sounds like 2.25" would be the choice demographic w/ a hi-flow cat and muffler...

[ImprezaVA]

Throwing a bump in the road a disagree about the piping diameter for a 1.8 liter. I have a 2.2 that had a custom 2.25" catback, Thrush glassback (18" Long, 3" OD, 2.25 inlet & outlet), welded to a Magnaflow (14815 I think). Low end torque was gone, gained maybe 5 hp on the top end with help of K&N panel. In conclusion, and I'm not an expert, but I've found that 2.25" is probably optimal for the 2.5 liter, but 2.00" is best for a NA 1.8 or 2.2. After I put my stock muffler back on with 2.00" piping it felt like my car hauled a$$.

I think you should go with 2.00" on your 1.8L IMHO.

-Charles-

[bongchild]

Hm, interesting point. Would the fact that your engine is single port exhaust and mine is dual port exhaust have anything to do with it?

[Kostamojen]

Originally posted by bongchild
Hm, interesting point. Would the fact that your engine is single port exhaust and mine is dual port exhaust have anything to do with it?

Interestingly enough, the 1.8 exhaust ports are pretty much the same diameter as both the 2.0 and 2.5. I do wonder about those single ports...

Anyway, 2" seems awefully small for me with a high flow cat. If it was just a catback, I would say 2", but with a high flow cat in there definatly 2.25", since the main hinderence in the 1.8 exhaust is the cats (they have a smaller outlet than the other engines) while the headers are actually the same.

Besides, 1.8's have no torque, nothing at all, its impossible to tell when they are loosing or gaining any. Im still curious as to what a full exhaust would do with a 1.8, as I havent had the chance to replace everything yet. I do however believe that getting the car to rev faster is a good way to counteract any torque loss (IE underdrive pulleys, lightweight flywheels)

[bongchild]

Yeah, I'm curious myself as to what a full exhaust would do to a 1.8L. I also plan on getting an intake, engine mounts, and lightweight pulleys...

[ImprezaVA]

Would the fact that your engine is single port exhaust and mine is dual port exhaust have anything to do with it?

I would guess, repeat, guess, that one big single port would flow better than two smaller ports that equaled the same overall diameter.

Not to jack the thread, but why did Subaru go with the single port instead of the dual port?

A full exhaust does seem like it would warrant more reasoning to go ahead with the 2.25" piping, but I only had a cat-back so that's unchartered territory for me.

-Charles-

[Section 8]

Originally posted by ImprezaVA
I would guess, repeat, guess, that one big single port would flow better than two smaller ports that equaled the same overall diameter.

Not to jack the thread, but why did Subaru go with the single port instead of the dual port?

A full exhaust does seem like it would warrant more reasoning to go ahead with the 2.25" piping, but I only had a cat-back so that's unchartered territory for me.

do not use diameter to compare. You have to use the area.

THe same area, will flow the same ammount of gas. Where the problem lies is that to get to the single exhaust port, the exhaust gas has a cuple of kinks on each cylinder to make it there. You also loose the ability to use an equal length header because there are only 2 exhaust ports.

cheeRS,

Greg

[rodneyspeed]

I have a 99 2.5rs and I just put on a magnaflow 14816 dual tip stainless steel muffler with a 2.25" inlet and had a pipe bent and joined to the 2" stock pipe and let me tell you it sounds awsome, a very deep rumble and not so bad at high rpms. I was going to go for a high flow cat and a 2.25 pipe, but I really didn't want the car to be to loud so I kept the stock cat and pipe. I don't think that I got very much performance gain with this set up, but it sounds great and thats what I was looking for, and after test driving the new sti I figured whats the point, the rs is never going to be that fast without spending a ton of money.

[bongchild]

I know my car isn't going to be as fast as an sti, but I want to make it more fun to drive since I'm probably gonna have it for a while. I'm thinkin with my current plan of action It'll be pretty zippy. A 2.5L swap will probably be in order sometime in the future as well....

[soobyfan]

I have a borla hearder, high flow generic cat, 2.5 piping and a flowmaster muffler and it is extremely loud but very good sounding...I am considering getting a resonator installed to see if it makes it a tad quiteter and nicer sounding

[bongchild]

What series flowmaster do you have? I got my eye on the 60 series. Does anyone know how they sound, by the way? Any input about the other flowmasters will help also.

[silent_rob_95]

I would say the 2.00 is a good choice. Everyone that says they have a 2.5" piping or 2.25" have the extra displacement. You still want some backpressure with your 1.8L. Having the biggest exhaust piping is not the best idea. my 2 cents.