Can't say I've seen a twinscroll setup personally on a non avcs car Jura, I'm sure there is someone on here who has fettled with that setup from what I've read but unsure what the outcome was, my buddy was thinking of possibly changing to a twinscroll setup on his classic after going out in mine, so this is something he will have to consider, but on mine with avcs I can out spool a standard vf35 on a uk Sti car by my calculations of circa 500rpm, an given the size of my turbo compared to a vf35 I would say that's good going :) I've had both a uk car and Jdm and I must be honest I don't think I could go back to single scroll unless it was more power I was after and I couldn't get a twinscroll unit to suit, the only thing I do miss slightly is the thunderous burble :lol1: but when on full boost the howl that comes from the LM coupled to a milltek is something else! It sounds like a super bike on full chat :D

I suppose this is a silly question, what would a rotated gt30 be like on a 2ltr with avcs? :D

Yes Jura, they do make decent power, but the 206 is less laggy, I personally see no benefit of bang for buck performance from a rotated set up unless aiming for alot more than 500?

And again, a 2" up pipe for 500hp is too big. and even for 600+ you shouldnt need a 2" pipe. The UK is so far behind the rest of the world in tuning cars it is unreal. Again, I would advise speak to Chris at Killer B, he has a vast amount of experience and has worked with F1 teams developing exhaust and manifold systems and is running cars at 600+hp on 1.5" up pipes. Just because it is what people in the UK do doesnt make it right ;)

Much like this fascination with unequal length manifolds that restrict the power, equal length manifolds unlock so much more potential and have a whole host of benefits but are rarely used in the uk for some unknown reason. Why would anyone aiming for decent power choose an inferior product?

I come from a starlet orignally, and the uk couldnt get anywhere near the rest of the world in tuning them.

Jura, on my s206 I was running almost as much as your meth map on the MD turbo on just T99. (485), That isnt to be sniffed at from a stock position turbo :)

Hi Craig

Best is to use Romraider,cheap OBD cable and Virtual Dyno,LM400 has been awesome turbo on his car,but I've expected little bit more(better spool up)

LM450 and meth should make nice 480-490bhp,which are nice number for road car.Meth is worth and extra BHP/Torque is more than welcome

We are tried friend JDM STI and he running too LM400 and on his JDM spool is awesome

But this can be due JDM
Jura

GT30 .63AR should be OK on the 2.0L,but you are really need 2.1L at least


Jura

Il let you know in a few months, what i would like to know is do jdm large port avcs heads and cams help much with spool and driveability, ive bolted them on my engine hoping its gonna help when i get it all put together and sorted

Im sure I've read somewhere the smaller port heads work just as well, I think there is a thread somewhere with what's what and debates from both sides but I'm sure from what I've read there was no significant gain when changing to the larger Jdm port heads, I have no experience with it personally but if you dig through a few threads I'm sure you will come across it, trouble is there are so many of the feckers :lol1:

Basically iv gotta do a bit of D&D lol

Didnt want to throw that much at it though

Need a vote:-

Rotated or standard position

Vote now 😂

Make your own mind up, We have given you the information you need.

Like I said, you are approaching this and making your decisions for all the wrong reasons, and the performance will show this. Making your own rotated kit isnt just a case of just welding any old pipe together,

It seems like nothing that has been said has really been listened too.

Not wanting to "throw that much at it" will result in problems, Do you have any idea of the running and tuning costs of a 500hp car?

The build is easily 20k, and running costs are through the roof. So if you arent wanting to "throw that much at it" a 500hp car is not for you. You need a bottomless bank account, and bottomless patience

d.kenny the ball is in your court mate,all the information you need for the questions that you answered are all there,so really it just comes down to the turbo that YOU want to use and how much money that YOU are prepared to spend on your project,regardless of what you say about fabricating your own pipes the rotated set up will always cost you more money trust me on that,make a decision from the information that is gathered here and try to stick to it,or otherwise that's when it really does get expensive and you start to lose your way and begin hemorrhaging money.SJ.

Do some research and decide what you want then work from there. For example I want to go for an sc38/40 setup on my sti. Breakdown is:

Turbo £1200
Injectors £300-£500
Headers/up pipe £500
Decat £100
Fmic £200
A map on my alkatek £180

That should see me 400bhp BUT I then will also need to go six speed and will start building a 2.1 stroker at the same time

You forgot alot of stuff on that, mainly consumables, looking at £150ish for consumables and what not :)

Gaskets, etc, 6sp clutch + flywheel, its always the small stuff that bumps the cost up!

But that looks like a good plan roy :)

To the OP like i said, your attitude is going to be your downfall because 500hp and not wanting too much in it are not compatible trains of thought.

This is the section that you really need to have a browse through to see cost and different ways to get to certain powers it will give you a lot of help and additional ideas.SJ.
https://www.scoobynet.com/projects-40/

Yeah gaskets etc and headers fitting kit bla bla bla haha I have it on good authority that my 5sp can handle 400bhp so it wont be swapped out initially but will be within 6 months . Also going sc 40 will be pretty laggy but will be perfect when the 2.1 gets built.

What authority is that?:)A 5 speed box would be on borrowed time on 350 bhp depending on how it's driven:norty:SJ.

All depends, Martyn Jeffery ran a 5sp at 550+hp for a few race events with LC etc IIRC

+1

My buddy Owen has a type r running 380ish maybe a tad more an he is on his 3rd box within a year, it's no good telling yourself you won't drive it hard or give it a bit of abuse from time to time as this is what the cars are made for FUN :) no point spending all that money and think "ahh it will be alright ill just take my time" or why spend the money on it in the first place ;) I agree some have been luckier than others with the 5 speeds but the number of people who have shat them out with a bit of a hard launch or high power and torque speak for themselves bud :)

Indeed, but on the same token, my 6speed is ****ed too, So its not like a proper solution lol.

And the ppg ones are ****e too...

Id take my chances with the 5sp until it breaks

J he was very very lucky or he had it rebuilt with tougher gears my wife is on her second gearbox in her classic,so for her project has got a 6 speed box waiting to go in those 5 speeds especially the early ones are ****e and must of been a legacy box moved over to the impreza.SJ.

maybe. I just know it was a 5sp, and that was used at dakota drags a few times. :) He blew up the ppg one inh is first event a few weeks ago! was defiitely a standard one before though.

Id just stick with the 5sp until it dies, might get lucky, my 6spd is due a rebuild, as 4,5,6th are fooked!

But no doubt you drive it like it should be driven :lol1:

And I wouldn't disagree with the statement of taking your chance until it pops, I just think you need to factor in the costs at some point that's all, you should know I don't change things unless I have too :lol1: :thumb: I'm all with that principal as otherwise your could be throwing money down the drain, but the 5 speeds are still a bit temperamental ;)

I dont know what you are on about ;) I have my 500hp scooby to try and get 35mpg! :thumb:

Is that your one J? Nice,Ruff bit of drag strip though:)SJ.

Yeah thats mine, 11.6 1/4 on that in the damp, on road tyres and with a full tank of meth/fuel ;)

10s next year i hope when i get up to shakey

Yeah it was martyn who told me haha . . anyway as said its not a long term solution but as said initially the car will stay 5sp

Hi there

JDM Big port heads with their cams is good way to go,but finding them uncracked is sometimes big challenge

We are run WRX JDM heads on our wagon at 490bhp and they're been OK,but we are lost with them on top end,with better heads or cams we should gain,how much hard to say

Jura

My vote gets Rotated kit,but right standard location turbo can be good option too,really all depends on yours budget

I've seen MDX321V on 2.1L has made 505bhp only on V-power and on 20% meth has made 560bhp,which is good power on that turbo

Jura

We are running PPG,now at 555bhp without the issue,we are run previously same PPG at 490bhp without the issue,we are tracking the wagon and we are attending drag runs and we are never have issue with PPG

6 speed will be on card,if we are want to run meth and NOS,but for now we are very happy with power what we are running

Jura

i want to go rotated but i think standard fit is less hassle

either sc50 or s206 i think il go with

sc50 seems less hassle

need to source some injectors

should make a good useable package and the engine will not be stretched to its limits even if the gearbox is and even if i only make between 400 and 450 il be happy for now

i may collect parts for a rotated to as they will always sell on again!

cheers for your help so far

Check the sell section there's lots of bargains to be had and I'm positive I've seen some rotated kits on there as well,don't forget that lateral performance can sort your standard injectors to flow more,increasing there cc which is a option that could save you money.SJ.