tlr_rst

I have owed all 3 full system exhausts, the car came with a 3" magnex been on it 19 years and have receipt. Looks good sounds ok.

Then i got a 4" scorpion. Looks great, sounds great but it really did feel restrictive against the magnex, like it made the car feel slower on boost. Do drones like mad.

So then i went back to my magnex and sold the scorpion.

Then i got a 4" mongoose. Looks great, sounds the bollocks. And its so much quicker on this exhaust than the magnex. Its 2.5" bore straight through and the back box straight through with no pipe reduction. Theres no delay on boost it just spins and boost.

Mongoose all the way. You think you got a good never had any problems with ya scorpion, you gotta switch to mongoose fellas..

Just thought id share my experiences

bigdel

Had a Mongoose on my 3dr for years, and you're right, it did sound brilliant, but it did get a bit tiring on a run, so eventually replaced it with a Magnex system. Best thing I ever did. It's quieter but still has a really nice bark when you give it the beans, it's smoother and just suits the car better.
Each to their own though!

rst230bhp

iTrader: (1)

i had a magnex on my erst sounded great

RSmark84

Gotta say Scorpion on an RS turbo/turbocharged CVH.

Love the burble on my ERST MFi and the sound on my FRST growling away sounds pretty epic. I can't see a Scorpion logo but have a burton power receipt for it which isn't clear on what make it is, But the person who bought it from them was adamant its Scorpion.

kyle_st200

I had scorpion on my rst and loved it. Never liked the sound of magnex when I heard them but never tried a different exhaust on it to see if it drive better

Chopshop85

iTrader: (4)

IIRC Scorpions have a smaller diameter inside the backbox which causes restriction.

Not sure what I've got on my car at the moment. It was sold as magnex but there's nothing to state otherwise. However, it sounds fantastic. 2.5" with a cut tailpipe.

In my experience:
The scorpion felt a bit hesitant and sounded pretty pathetic.
Mongoose tended to drone a bit.
Magnex has a lovely rumble and sounds great with a bit of boost.

studabear

My S1 when I was a kid had a brilliant exhaust, think it was from power engineering, all 1 piece from turbo back, no droning on motorway, went well.

My cabrio has had a scorpion which I found ok, I switched to a full mongoose for the zetec turbo and i sounds great when its screaming like a banshee.

3i Jim

S2 + 24psi + scorpion 4" outward rolled lip =

botters

iTrader: (2)

scorpions are only 1 3/4 inch diameter inside the back box are really restrictive but do sound well they can be identified by the scorpion logo pressed or engraved into the tailpipe

tlr_rst

i called mongoose directly and a good chat, they used to be part of scorpion which is Collins motorsport but branched out and created their own stuff so was born Mongoose. Scorpion are restrictive inside the back box. No matter how much you like your Scorpion. My car is standard power standard boost etc and i find a big difference. Imagine what someone with more power would experience switching to mongoose

smsnw71

I was told my exhaust was a scorpion as the rear hanger is welded to the back box and there is no exhaust joint near the back box ( exhaust is in 3 prices)
However after reading above there is no logo on it anywhere and the tube through the back box is 2.75"
Did scorpion make different types or is this possibly something else

studabear

Scorpiom was pressed into the rear silencer on mine iirc.

tlr_rst

thats a scorpion i believe you have. when i spoke with mongoose they said their systems have a backet what wraps around it to create a hanger, scorpion have a welded hanger on the back box

chopperUk

Mongooooooooooose all the way. had magnex but hands down the goose wins noise power and looks

botters

iTrader: (2)

if it doesnt have scorpion pressed or engraved onto the tailpipe then it isnt a scorpion

TOMMY_TURBO

Had a scorpion on my rst and it sounded the nuts was 3" bore 4 1/2" back box got a mongoose on the cossie sounds to quite and that's 3" bore 3" back box think I may need to put a 4" back box or maybe take centre box out but looks like it Just bigger tube lol also my dad had a scorpion on his cossie sounded a lot louder that also had no middle box

mentalasanything

The rhetoric I follow regarding ERST exhausts:

"If it isn't a Mongoose, don't bother"

There was a scorpion fitted to my ERST when I got it and I hated it. Its only purpose was to be loud. It was restrictive and it didn't even fit very well. Swapped to a 'goose and never looked back. Fits well, just the right noise level for me and it sounds amazing at full chat. But above all, the name is cool!!

Lee

tlr_rst

good quote above fella, i wonder what I've started, wonder how many scorpions we will see now appear on ebay etc. mongoose fits better than scorpion i agree, mongoose is just right loudness and on boost, all scorpion is is loud and drone, it was designed 20 years ago and was only 1 design. never had a redesign like an iPhone so many models. the scorpion just 1 design, same with magnex and mongoose, its just mongoose branched out from scorpion and made their own redesign and made a mongoose which is why its based on a scorpion but better, fits better, and none restrictive. end

kyle_st200

Mine has the scorpion logo engraved into it. Sure it was a 4" outward rolled I remember it seemed to be big anyway.

Can't really make out the exhaust on that pic but the best one I've got. Restrictive or not I loved the sound of it, would love to have a go in it again and hear that pop it made when I change gear

Chas

From the French world (well, a 306 Gti-6 and 106 GTi) I would never touch a Scorpian. Cheap fragile crap IMHO (2 of my friends had their back box hangers break off like a branch with one or two (besides many on the forums) requiring the front section be rewelded far too many times for a stainless system!

Out of the choices I would go with Magnex or Mongoose. Another contender IMO is Janspeed who are possibly my favourite ; On two cars they have always been a great system. My RST is on a custom system which seems to be working well and is surprisingly sensible on a motorway (around a 2.5" diameter with one box at the rear).

If you really wish to be leftfield I would also consider Jetex. They are however the quiet performer (on my 306 GTi-6 it was quieter than the pattern exhaust which was removed!), but it did work well with the car. I also would not rule out a good custom exhaust builder.

makaveli96

I'm running a full Scorpion Stainless Steel Exhaust System with a 4” rolled out tail pipe, has been on my car for over 12 years and I have never ever had any issues, it looks, sounds and performs great in my opinion.

Chas

Has the ownership changed since you bought the system? That would explain why some recent Scorpian systems leave little to be desired. After all, look at Mikalor clips (the clips that years ago used to seal well!).

Canada1

Has no one ever dyno tested the different exhaust systems offered ?
An exhaust system "shoot out" or comparison would be a neat magazine article.

makaveli96

I bought the car 12 years ago and it was standard apart from the full exhaust system I've done almost 60k and not had a single fault with it. That's good yeah! No hassle and free maintenance that's what I call top quality from Scorpion.

Mr S1

iTrader: (2)

Exactly what I've got - best system by far. Made by Cheesemans. Wasn't cheap back in the day, but you got what you paid for. Haven't been able to get them new for years now, and good luck trying to get a used one. Haven't seen one for sale for years.

Mr S1

iTrader: (2)

As if by magic !

http://www.ebay.co.uk/itm/Escort-RS-...item339ab14ed1

studabear

Mine was outwardly rolled. 😎

Mr S1

iTrader: (2)

Don't think it was a PE system then mate ? I know Power's well and have done for years, and the system in that ad is the same as mine. I stand corrected, but I'm pretty sure that's the only system they ever had made for a RST.

studabear

I couldn't be 100% it was a p/e but it was deffo piece from turbo, rear box was huge and it sounded great, think tail pipe was 4" outwardly rollled.

Edit to add, it was on the car when I got it.

Mr S1

iTrader: (2)

The one in that ad is a Power system - if yours wasn't the same it wasn't one of theirs, or not a full system. Tailpipe wasn't outward rolled, I'm sure of that.

tlr_rst

I've decided it will be the mongoose i will keep, I've now got a magnex 3" full system to get rid off, ill offer it in the for sale section

Chas

Yes, either Fast Ford or Performance Ford did. They tested their systems against a stock tired system.

IIRC the results went something like the following:

Magnex - 2.5BHP increase but praised for its ease of fit, exhaust note (albeit on the quieter side) and great build quality
Scorpian - I think they were around 2BHP. A couple of other brands came around that figure
Janspeed - 3.3BHP was a quoted figure but the price seemed to put them off as well as the lack of tailpipe choices.
Mongoose - over a 4BHP gain I seem to recall with it being classed as their best buy. That much I do remember!

However, that IMO is only ever part of the story. In the Triumph world only 1 tubular exhaust manifold made for the straight 6s actually gives extra power with a great shove of torque over the range (and I am talking almost 20lb ft extra when done as a back to back test against others!). Cheap that manifold is not (and people trying to recreate it have seen that they are not cheap to recreate...).

Like many I have a single box 4" outrolled tip. Even with no interior I would not say it is the boomiest exhaust I have had on a car. Loud it is for sure, but not boomy; the cherry bomb back box a friend had on an XR3i took the honours for that ; a normal system seemed to make you question whether the engine was working or not after going back! Yes, motorway trips almost gave you thoughts of tearing out your eardrums! .

makaveli96

I would of thought any of these straight through exhaust systems would give about a good 10bhp over standard surely.

phil_rs

iTrader: (3)

There is only one choice for me.... Mongoose

Chas

Apart from an exhaust where the cat was collapsing or a huge engined monster where there was a severe restriction present (to the point of near silencing a car) I have never seen an exhaust give an exhaust give a 10BHP gain on a 4 pot ; my last car with zero restrictions present (I.e no silencers in sight) didn't even gain quite that much (also a turbo car).

Manifolds however, yes I have seen them (Pumas, Focis, and Fiestas with the Sigma engines gain quite a chunk of power with the right manifold). Even then it seems there are too many manufacturers happy to cash in on their item being a modder's item rather than it actually working and providing true gains. Then of course you go into the power delivery (i.e where the power is produced and over what duration of the rev range) but that is going off topic .

makaveli96

When I bought my rs turbo back in 2002 which had only 59k it was completely standard apart from a full Scorpion exhaust system I had a brand new K&N induction kit fitted which I'm sure it adds about 3 bhp and a Bailey dump valve which adds no extra bhp I had it fully serviced and had a full rolling road dyno tune at Power Engineering and it came out with 146bhp that's an extra 14bhp over standard so the exhaust must gave out about 10bhp
here's a picture of it as prove.

tlr_rst

true about the air filter and the exhaust adding some bhp but there are other contributing factors, back then these cars were to run on 98ron, now myself and others tend to use shell or momentum which is 99ron which makes a difference, (trust me I've tried 95, and esso 97) can't beat shell stuff, and also the engine advance was set at factory something like 10 degrees when it rolled out. nowadays they are tuned on advance, mines totally standard apart from a mongoose, cone filter, and advance of 13 (set up jano) and is loads faster than when i bought it with 95 in the tank and less advance

Versus_Creations

iTrader: (1)

Dont forget that now days our petrol has a lot more bio mix than it used and the actual octane ratings are not what they quote.

Connor

Had a Scorpion on my Escort Cossy which sounds immense.

Had a magnex on my RS Turbo i bought in September and put a Scorpion on it. In my opinion it sounds better

Chas

You said the car had a rolling road tune at PE. Enough said .

I have seen Mini owners gain 15-20BHP from simply a good rolling road tune despite the owners insisting that they got the timing correct and mixture. That is on a Mini. Rolling Roads are never the most accurate of things anyway. With what the above posters said about the conservative timing ratings if run on normal fuel that itself would explain a lot (in the SX world many people simply push the ignition timing up to gain the BHP.