Out of curiosity which of the above graphs are avcs?

 

Darren speak to mark at lateral mate. Md321T is avalible in twinscroll. Very good turbo option for 450bhp in my opinion

 

I'll have a look at that joe

 

I agree slightly, there is, the 42. But I'd be ringing it's neck with Tim mapping it lol. The 42 would be ideal but it's a 50/50 chance that's I'd get what I want and tbh, something inside me tells me I might want to push my engine that little bit the PT will give me scope to do that.
If my car goes bang, I've still go a turbo that I could achieve 550+ on a built block with meth.
From what I've gathered though is, the PT sits in the middle of 42 and 46 IMO.
Look at the power it makes at 4500rpm compared to 46.
And I do like to be different in trying a less popular/newish turbo to subarus and see how it goes.
And if I'm not happy, i won't be shy to say, yes you told me so.
P.s the price on pt from a certain supplier I've found is also encouraging

 

Tbh busta i still think your getting too hung up on figures, a 470bhp lag monster will be pants to dirve

 

Heard precision turbo's were unreliable and had many failures, Google it.

 

I belive all as that's what I was looking against, the higher hp ones I belive are more boost and meth. Lower ones are stock set ups.

 

Does anyone know a price for this turbo as the website doesn't say.

 

You're probably right, but you can't have both big hp and spool at same time so I guess there needs to be some sacrifice somewhere.
As they say, if you've got lag, you're in the wrong gear.

That's the old units I belive

 

2.5 for the win

 

Looks very laggy to me? From what you posted before would the turbo dynamics unit be better suited?

Also just looked atmy graph, and I'm makingdouble the hp at. 4k rpm on a larger turbo!

 

T36?
If so, the t36 I have been waiting well over 2months now for them to be revised with oil seal sorted and BB upgrade.
But it's getting very tiresome waiting.
But apparently they are testing them as we speak and should be with ET this week.
Well, I'm not holding my hopes up as been waiting a while already, but if it does arrive with et this week then I will buy it. That turbo should easily make 450+ with meth and would be ideal for the price.

 

That's the one! Roller bearing with billet wheels?

On my non roller bearing T38 by 4.5k 340hp, compare that to the sc46

 

Give mark a call mate. If your not arsed about figures the 400bhp unit would be ace on the road in a spec c. His turbos aren't cheap but that's reflected in the quality, they are very good

 

So ok then, what others would you recommend that will give a comfortable 450+ with matching spool? For around the £1500 mark

 

Since edited my post to fill you in.

 

Yours a 2.1 rotated? G30 or 35

 

T38 (s206) turbo dynamics.

2.1. Standard heads etc.

There are a couple of 2.0graphs around. Baring in mind mine is a 500hp turbo, and comparing that to the sc46 it is much more responsive.

The t36 is going tobe a good unit, let's just hope. They come out soon!

 

Well if yours is a 500hp unit that's very good to make double at 4krpm. Obviously the 2.1 will help slightly but still good.

You're all mashed my head up now lol.

Yes I do too, but I've been waiting too long now, but as said if it does come this week then I'll buy it.

 

Not great deal apart from the usual suspects, best of the bunch being the Litchfield LM series being a true twinscroll housing rather than twin entry...that is unless you want to spend £2.5k+ on an Owens twinscroll one but saying all that I can't recall seeing a decent graph of an aftermarket twinscroll turbo compared to OEM except Fellys Owens one...hence I've not bothered changing as I love the low down spoil of the twinscroll VF's....just a bit pants after 6k RPM

 

Litchfield LM are twin entry not twinscroll btw.

 

Are these turbos ok to fit to a standard uk 2.0 sti. Blobeye ? Got FMIC decat ? What can stock headers be used too ?
Any other vital mods ? Or is that too high anpower on stock internals ?

 

I opted for more top end power on my current 2.0 setup with compromise to spool chosing an md321t as i drive mainly on major roads and dual carriage ways. My graph is similar to those above in that its not making maximum torque until 5k but after almost a year with this setup i find it great to drive in town with no issue with lag, its pulls hard after 4k and once its on boost it hits harder and pulls through the redline without dropping off.

Im planning on doing the same again on my new 2.35 build, as ive had the most fun on the dragstrip this year and the type of roads and tracks i mainly drive on im thinking of the same compromise again and thinking of going with a gt40 rather than the gt35 i planned on. Will be getting some major head work done to increase the power band though.

 

Around 450 is what most rate the stock sti engine at. Tubular headers would be beneficial too at that power.

 

Ive just been shown this, any thoughts LOL
http://www.hks-power.co.jp/en/product_db/turbo/db/13857

 

Really?...so there are no true twinscroll aftermarket turbos then?
Or am I getting confused with another turbo...memory isn't what it was lol

 

Tell me about it

I believe the Owen Developments turbo is a genuine twinscroll as are, I think, the SC twinscrolls.

I remember being mildly miffed when Litchfield introduced the LMs - mine was one of the very first - and discovering that it was twin entry not twin scroll: especially as it was headlined as being twinscroll.

Iain argued that there was a good reason for this (I don't recall what) but it is definitely twin entry not twinscroll.

The LM's were introduced as a (very nearly almost) bolt on for the JDMs to make upgrades easier for us JDM owners, rather than being done for purist twinscroll reasons (if that makes sense).

The spool on mine is not at all bad, but I do feel for a "twinscroll" it perhaps should be better: on my 525bhp 2.5l, I see 1 bar at 3400 rpm in 6th and full boost at around 3700/3800rpm; in lower gears there's not a lot happening below 4000rpm - but once it's on song there is mininal - I'd say no - lag during gear changes and the power just keeps coming and coming and I LOVE it

At the time the observations for JGM and others was that for the money I would probably have got better and more cost effective results changing to a decent single scroll.

I would love to try an Owen twinscroll but it's an awful lot of money to maybe gain a few 100rpm spool, so I just drive it and enjoy it. Just passed 45,000 miles on this engine by the way!

 

The problem here guys you're all comparing apples with oranges.
It's no good comparing a 2 litre with a 2.1, or an AVCS equipped car with a non AVCS equipped car, or a Killer B header car with a GT Spec header car.
I'll post a graph in a moment comparing the Precision with a 42 Billet + car both using 2.1 litre AVCS equipped engines that I mapped.

Chilli first

 

Here you go.
42 Billet + in Red, Precision Blue.




Boost profiles for both.



As you can clearly see there isn't that much in it in terms of spool but the Precison makes a chunk more power and at less boost too.

 

pretty much as expected though martyn

How olds the 42 you tested? is it the latest spec one?