Stagea S2 - Aftermarket Dump Pipes

[ssshonky]

I went thru the split dump pipe thread already- and that was not a massive help.

Basically what I want to do is get a better flowing dump for our S2 stagea

I dont really want to go down the custom Path - and I saw somewhere that the CES ones for the R34 GTT works - but I am still waiting on Confirmation from the suppliers

so in the meantime I really want to hear from the people that have " been there done that "

ie- what gains did you get HP wise etc- any change to exhaust note- any improvement in fuel econ?

so yeah.. that kinda thing.

I just really need to work out what is the best way of going about this - Bang for your buck being a prime focus.

[dmonic1]

i have an early S2 and when i brought an R34GTT dump pipe it ended up being wrong (only in lenght by a few inches but still fitted i just needed a custom decat pipe)and as it turned out i should have got an R33GTST one, just something u should look into if u have a really early model S2 or a RWD only like what i have. i brough an AM PERFORMANCE split dump pipe of Andrew here in adelaide and he sells them on eay for about $380 i think it was. i put a trust power extreme II 3 inch cat back behind it and found that i had a sweet note through the entire rev range but what i did notice was the great improvemnet in spool up time. the only thing i had to do was slightly bend the oil feed line going into the turbo to miss the waste gate section of pipe. i would use anything this guy makes as it is impeccible quality. just my two cents

AM-Performance ([email protected])

[jippa]

i to used the am performance dump pipe and it seems ok. also running a metalco cat and xmetal cat back recentley fitted ( 1 resonator 1 muffler) mine is droney at 2 grand. as for bolt in didnt do it myself because the metalcat needed to be welded in so got them to fit the dump. the shop said the press fit part of the dump didnt fit so they ground it off and the mounting bracket does not fit onto anything, just hangs in the breeze. the boost levels went up with the higher flowing exhaust fitted. it now peaks at 9 psi. almost creeps upto 10 on a cold night at full stick

[ssshonky]

see dont really wanna go fannying around with grinding and stuffing around - as there MUST be some sorta direct fit - but thanks everyone for the info so far - keep it coming ...

so far the AM performance one seems to be the go - only thing I dont like is the price

[Xmetal]

metalco cat and xmetal cat back recentley fitted...

*scratches head&....keh!

The other option you can look into is the JJR stainless 1 piece split dump pipes from Just Jap - i've heard they can be a tight fit, might want to suss that out before you go spending your cash.

The other alternative is the JJR stainless non-split 1 piece dump pipe for $199 which i'm buying soon, i'll post in here and tell all if it fits.

[dmonic1]

the am performance split dump has a divider that goes into the the waste gate area of the exhaust and yes it is a very tight fit but i cant imagine that it wouldnt fit. i saw Andrews jig that he uses and it is absoloutly fool proof as he has the exhaust housing at one end of the jig and a flange which would be where the cat is at the other. i thought about the cost also but what the hell, u only live once. just email him for a few pics

[dmonic1]

http://cgi.ebay.com.au/NISSAN-SKYLINE-R34-...1QQcmdZViewItem

[RS4StagMan]

I have just purchased;

- JJR single bellmouth front/dump 3 inch stainless steel ($199 + Postage) (R33GTST) and

- Xforce Hi flow cat 3 inch (R33GTST)

All from Just Jap and will get them fitted in the next few days.

http://www.skylinesaustralia.com/forums/JJR-1-Piece-Stainless-RB2-t204414.html

I discussed with Just Jap the correct part to use for Series 1 and Series 2 Stagea and they confirmed that the above bellmouth front/dump will fit (they offered to refund my full purchase price including postage if it doesn't fit without modification at the turbo side and the cat side).

They did acknowledge that they had a problem with the JJR SPLIT front/dump as it did not fit properly and have since de-listed this product for the Stagea.

However the single bellmouth one is listed on their website now and in above link as fitting Stagea.

I will let you know how I get on once fitted......

[chook]

I got a HKS pipe, 1418ｰRN010, which is same part # for S2 R33s, all R34s and all S1 and S2 Stageas (except non-ABS S1s - 96/9～98/8)

http://www.hks-power.co.jp/products/turbo/support/ex/ex.html

[darrinspencer]

Have you read this thread, usful info from post 23 onwards

http://www.skylinesaustralia.com/forums/Ju...stjap&st=20

Basically a R33 dump is the correct pipe length for series 1 and series 2 stagea

R34 dumps are approx 100mm longer, so they will NOT fit

When picking a R33 dump, either split or bellmouth, make sure the section of pipe running horizontally under the car to the inlet to the cat is NOT straight. It must have a offset down and back again to the cat, otherwise it will hit the floor.

[RS4StagMan]

Some have PM'ed me RE: the parts that I purchased from JUST JAP requested a link so here they are below;

Note there is a listing now for the Stagea on their website;

JJR stainless bellmouth front/dump pipe $199;

http://justjap.com/store/product.php?produ...=276&page=1

X-force 3 inch stainless Hi flow cat for the Stagea $175;

http://justjap.com/store/product.php?produ...=275&page=1

You can always email Just Jap to confirm fitment.

[DaveB]

I went thru the split dump pipe thread already- and that was not a massive help.

Basically what I want to do is get a better flowing dump for our S2 stagea

I dont really want to go down the custom Path - and I saw somewhere that the CES ones for the R34 GTT works - but I am still waiting on Confirmation from the suppliers

I am interested in your reply... I want to put a SPLIT dump/front pipe on my series 2, but I'm not going to the effort of fitting a new dump unless it's a SPLIT pipe.

Yes there are bellmouth pipes on JJR, but not splits for C34. I am with you ssshonky - wtf are they??? there must be something somewhere... and hopefully for not much more than ~$300 max.

Just on a side note.... little ot... how many catalytic converters does the standard (compliance) exhaust system have? I have one non-heatshielded cat at the front, welded in just after the std dump pipe (with an arc welder by the looks ) and then right at the rear before the last muffler is a longer section of heatshield which is bulged slightly, which looks like another cat??? If you go the hi-flow cat route can you ditch this one and not have to worry about emissions?

[darrinspencer]

I am interested in your reply... I want to put a SPLIT dump/front pipe on my series 2, but I'm not going to the effort of fitting a new dump unless it's a SPLIT pipe.

Yes there are bellmouth pipes on JJR, but not splits for C34. I am with you ssshonky - wtf are they??? there must be something somewhere... and hopefully for not much more than ~$300 max.

Just on a side note.... little ot... how many catalytic converters does the standard (compliance) exhaust system have? I have one non-heatshielded cat at the front, welded in just after the std dump pipe (with an arc welder by the looks ) and then right at the rear before the last muffler is a longer section of heatshield which is bulged slightly, which looks like another cat??? If you go the hi-flow cat route can you ditch this one and not have to worry about emissions?

There no cheap split dumps currently that fit

The cheapest is the AM performance at $380, BOS importing approx $420 or the CES for $650 in mild steel

The xforce bell mouth fits and the new JJR bell mouth fits as well and is a copy of the xforce but cheaper.

If you are worried about emissions, then do not modify your car

Series 2 needs 2 cats at time of compliance and series 1 only needs 1 cat. Thats why a series 2 costs an extra $150 to comply at some shops

[wolverine]

I am interested in your reply... I want to put a SPLIT dump/front pipe on my series 2, but I'm not going to the effort of fitting a new dump unless it's a SPLIT pipe.

Yes there are bellmouth pipes on JJR, but not splits for C34. I am with you ssshonky - wtf are they??? there must be something somewhere... and hopefully for not much more than ~$300 max.

back to back a bellmouth made more power everywhere on the stagea than a name brand superduper heatwrapped split dump so you may not be taking as big a backward step going with a bellmouth as you think.

spend some saved coin on a nice big catco/metalcat large bodied cat & nice 3" catback (i you haven't got one already) and bob's your mother's brother.

[DaveB]

There no cheap split dumps currently that fit

The cheapest is the AM performance at $380, BOS importing approx $420 or the CES for $650 in mild steel

The xforce bell mouth fits and the new JJR bell mouth fits as well and is a copy of the xforce but cheaper.

If you are worried about emissions, then do not modify your car

Series 2 needs 2 cats at time of compliance and series 1 only needs 1 cat. Thats why a series 2 costs an extra $150 to comply at some shops

Just thought I'd check... thanks so it does have two cats... $650 for mild steel OUCH. If the AM performance fits then I guess $380 isn't all that bad...

back to back a bellmouth made more power everywhere on the stagea than a name brand superduper heatwrapped split dump so you may not be taking as big a backward step going with a bellmouth as you think.

spend some saved coin on a nice big catco/metalcat large bodied cat & nice 3" catback (i you haven't got one already) and bob's your mother's brother.

lol cheers, think I remember reading about that somewhere on here a while ago but didn't know the difference between bellmouth and split then

[chuckie]

g`day all i put bellmouth on my s2 & had to mod it to fit .did make big difference very pleased with it great mod .cheer`s chuckie.

[DaveB]

g`day all i put bellmouth on my s2 & had to mod it to fit .did make big difference very pleased with it great mod .cheer`s chuckie.

Thanks Chuckie. Seeing as bellmouth 'non-splits' are the only thing that I can find for the Stagea, choice is looking a little limited.

EDIT: however this one doesn't looks too bad... cheap stainless pipe... for stagea http://justjap.com/store/product.php?produ...=276&page=1

Edited June 2, 2008 by DaveB

[ssshonky]

ok - a couple of things are confusing me -

1) I didnt see TWO cats under the car when I crawled under there the other day.

\what I did see was a CRAPPY 2.5 inch ( I think someone above wondered what cats come from compliance )

2) I called JJR regarding that bellmouth dump thats been advertised and they told me it WONT fit a S2

kinda odd considering even the part number contains WGNC34

there was a guy on one of these threads that was going to fit one in the last few days.

Thanks Chuckie. Seeing as bellmouth 'non-splits' are the only thing that I can find for the Stagea, choice is looking a little limited.

EDIT: however this one doesn't looks too bad... cheap stainless pipe... for stagea http://justjap.com/store/product.php?produ...=276&page=1

[darrinspencer]

ok - a couple of things are confusing me -

1) I didnt see TWO cats under the car when I crawled under there the other day.

\what I did see was a CRAPPY 2.5 inch ( I think someone above wondered what cats come from compliance )

2) I called JJR regarding that bellmouth dump thats been advertised and they told me it WONT fit a S2

kinda odd considering even the part number contains WGNC34

there was a guy on one of these threads that was going to fit one in the last few days.

1-My series 2 came with 2 cats. The car was complied at IMSHE on the gold coast. It had the standard large cat like all skylines and stagea's, but it also had a additional smaller cat that looks like a same hotdog resinator. It was mounted in the down pipe section between the normal cat and the turbo. That is why you may have not seen it when you looked under the car. It possible if your was complied at a different shop they may have not done it.

2-I will explain what I went thru to get a dump pipe. The first one I tried was a older version of the am performance split dump pipe. It fitted but had clearance issues with the waste gate pipe resting on the a/cond line, so it would eventually burn thru. The lastest am performance pipes have changed the design to have the waste gate pipe on the other side of the dump which would give clearance to the a/cond line. At the time and had already spending $350 buying the am pipe from another forum member the JJR split dump pipes came on the market and a cheaper price of $250. I spoke to JJR at the time with agreement I could return the pipe if it did not fit, as they had not tried one yet to a stagea so they sent me one to Brisbane. When I fitted the pipe up it hit the floor just prior to the cat. I was prepared to cut and modify it, approx 1 hr job, but after inspecting the quality of the flange to turbo, it was badly twisted. So I sent it back.

I then bought a X-force bell mouth s/s pipe from UAS as they were very helpful and had been thru this problem before.

It fitted pretty well and only fouled the floor where the gearbox cross member bolts on. I took approx 3mm off the end of the cross member and had to hammer the floor approx 5mm in where the lump is in the floor for the cross member mounting point is. Now it had enough clearance and never hit with engine movement etc. Cost was $350 at the time

The new JJR bellmouth pipe for $199 appears to be a exact copy of the x-force pipe, they probably come out of the same chinese factory. These should fit, even thuo JJR has said no. The quality if the x-force pipe was very good and had a 10mm flange to the turbo. The JJR split only used a 8mm flange which was the cause the twisting duing manufacture process. JJR was tring to get this recitified but can not say this has happened.

Beware with all the split pipes that have splitter pipe welded on is only good for stock turbo's. When you change your turbo to a hiflow or larger aftermarket turbo (ihave a apexi turbo) you will need cut these off and enlarge the inlet hole. With a bell mouth you do not have this problem.

Just to clarify, series 1 and series 2 stagea use the same R33 dump pipe, and do not use R34 pipe.

Hopefully that clears some of the confussion for you

[ssshonky]

thanks for that clarification - does help me immensly

ok I will order the Just Jap Belmouth and a 3inch cat- that should do it hey?

I am not against a bit of banging and grinding here and there.. long as its not taking anything too structural out .. thanks for the assistance