wat exhaust system ?? for a 5.0l

[mr_clubby96]

hey guys im deciding wat exhaust to get for my mild worked vs clubby 5 speed

at the moment im running single system pacemaker headers stock cat and cheap press bend 2.5inch cat back with a magnaflow muffler on the rear

does anyone have any ideas for good exhuast and also power figures

i had in mind a high flow stainless cat into a mandrel bend 2.5inch single system with sports centre n rear muffler

i got quoted for that $650

[Not_An_Abba_Fan]

I would run twin cats and a twin 2 1/2" system. From that I would estimate between 10 and 20 rwkw increase on what you have now.

[mr_clubby96]

wat about going twin cats into twin 2.5inch with xpipe then over the diff in a single 3inch

[stocky]

you dont go over the diff on a clubsport. just go twin 2.5, or twin 2.25. none of this merge into single stuff

[vrcalais5ltr]

i run a twin 2.5inch unsure of extractor brand twin cats one box on each. unsure of power advantage but it sounds good

[Vee-ard]

I would run twin cats and a twin 2 1/2" system. From that I would estimate between 10 and 20 rwkw increase on what you have now.

When I come down to perth, I think im going to let you take a look at my car and work your magic.

[Not_An_Abba_Fan]

I'm about 1 1/2 hours south of Perth, but if you want to come for a drive, I'm willing to look at it.

[rayvy]

im running twin 2.5" into twin 3" tips sounds deacent and gained probably 10-13kw without retuning. its a 355 tho not the standard 304

[mr_clubby96]

its booked in getting done twin 2.5inch into twin high flow stainless cats twin centre mufflers Xpipe and twin straight threw pipes on the rear end cant wait til its finished

[shanhsv]

what about a single 3in system with hotdog on the rear. Im going that or full 2.5in mid next year but i cant decide,help anyone.

[Not_An_Abba_Fan]

A twin 2 1/2" will give more top end, a single 3" will give better mid range. It all depends on what you want out of the car.

[STEALTHY™]

You forgot the most important thing. The sound. Twin 2.5 will sound 100 times better than a single 3in anyday.

[Not_An_Abba_Fan]

But you're biased.....

[stocky]

its true though. its a v engine so it just makes sense

[pedrotski]

Twin exhausts sound shit unless your engine is worked. Single 3" sounds good on a stock motor with a single muffler and no res.

[Not_An_Abba_Fan]

Funniest thing I have heard all day..........

[shanhsv]

damn,still hard to decide,the pacemakers im getting will give me the better top end torque at a slight loss of low end,which i can deal with. I want the deep burble that a V8 should have,so the zorst bloke said the 3in with hotdog on the rear is the way to go,but i cant move away from the full twin system

[Cobez]

I'd do your exact exhaust^^^^, but with a hot dog in the middle replacing the centre muffler, and keep the rear resi. The rear resi should keep down some of that drone, but will still sound great.

[STEALTHY™]

Twin exhausts sound shit unless your engine is worked. Single 3" sounds good on a stock motor with a single muffler and no res.

I'm yet to hear a single 3in that sounds good. You can always tell a twin 2.5, and its ****ing nuts (was some dude cutting sick after the GF last weekend, i assume he goes for whoever won)

[undar8ed1]

you dont go over the diff on a clubsport. just go twin 2.5, or twin 2.25. none of this merge into single stuff

A lot of people I know will disagree with what you just said, as the single 3 inch join at the rear helps the exhaust pulse "push" from each of all 8 cylinders firing and 3in is a larger diameter than a twin 2.5 from what I heard, as I believed that 2.5 and 2.5 = 5inch but yer not so apparently.

[mr_clubby96]

well i heard if ur engine is not worked alot meaning stroker etc apparentely by going with a twin 2.5 full system could be worse loosing power

i duno know wat to get twin would look nice also 3inch ive heard sounds pretty good but im confused just gonna do more research i dont wanna know im paying for sumthing dat im loosing power for

[undar8ed1]

well i heard if ur engine is not worked alot meaning stroker etc apparentely by going with a twin 2.5 full system could be worse loosing power

i duno know wat to get twin would look nice also 3inch ive heard sounds pretty good but im confused just gonna do more research i dont wanna know im paying for sumthing dat im loosing power for

You would not have any back pressure left if you go to high and will lose low down but gain more grunt up high, so when your cruising you need to step on it a bit to get the note up.
If you plan to do more work go bigger now and live with the system or just leave it until you do everything you wan`t to it.

[Not_An_Abba_Fan]

People are still hung up on back pressure....back pressure is a bad thing. You don't want it. What you want is exhaust velocity.

Twin 2 1/2" has a cross section of 6231.34 sq mm, a single 3" has a cross section of 4534.16 sq mm. Squeezing twin 2 1/2" into a single 3" will create too much back pressure and therefore lose (that is the actual word, not loose) top end. It may feel like you have increased torque or bottom end only because the engine is working harder to push the exhaust out so it chucks in more fuel.

Ideally, if you were to merge into a single, you would have to have a minimum of 3 1/4" single to keep the exhaust velocity up. A single 3 1/2" is the closest cross section to twin 2 1/2" so that would work as well, but not as good as 3 1/4" because the furthe the exhaust gets away from the engine, the cooler it is and it takes up less room.

As far as "power" goes, the best way to have the highest dyno reading possible is to have the exhaust finish at the extractors, and a twin 2 1/2" will give a better dyno reading than a single will every day of the week.

[greenfoam]

I've tried nearly every exhaust combo on the 5 litre apart from a straight through 3 inch because that was just silly. The twin 2.25 with merge in the middle I have now makes MUUUCH more power _everywhere_ from idle to peak. There is no need to even think about anything else (unless you want to go twin 2.5). Spend your pacemaker money on the rest of the system, you'll be much better off. Even with the straight through system and good merge I have now, it's faster again straight out of the collectors (39 inch headers tho) again everywhere in the power curve. My car gteched at 180 rwhp on the twin cat 2.25 into 2.5 straight through system I had (was only 2.5 at the back section) and made 208 rwhp on the twin 2.25 with merge. That's 28 rwhp same headers, same everything else

[stocky]

A lot of people I know will disagree with what you just said, as the single 3 inch join at the rear helps the exhaust pulse "push" from each of all 8 cylinders firing and 3in is a larger diameter than a twin 2.5 from what I heard, as I believed that 2.5 and 2.5 = 5inch but yer not so apparently.

i think thats what my crossover pipe is for