If your only looking to change turbo, I`d of thought the sc42 would be good. Ive got a sc46 billet twin-scroll and its going well.
As for what your internals will "safely take", that would depend on what condition they are in. I`d get a compression test done first. Then take the money you save, spend it on v-power and enjoy...

 

Why don't people who've commented on here with the different turbos put up their graphs for us all to compaire and then the guy can really make an informed dessisson ?

 

That would be helpful. I'd like to see how the LM and SC make power

 

Also, from what i understand Scooby Clinic offer to take the exhaust housing from my current turbo(vf36) to use on the SC42/46 as this cuts cost. But is it not the exhaust housing on the vf36 that restricts the airflow and limits them?

Or have i got my wires crossed somewhere?

 

Think that offers gone now ? As complete replacements now .
Though I'm not 100% , just from momory so more than likely I'm wrong
Ive got a uk sti standard engine on a Sc 46 billet I can post info if req mate
Happy to help

 

SC42 billet twin scroll, 1.45bar v power + 20% meth

 

Twinscroll at 450 must be rapid. When I had my JDM widetrack with only a titanium Fujitsubu Giken exhaust, it was pretty quick!

 

Sc 46
On standard uk sti ( engine )
No meth

 

How would 500hp TS setup behave like on a 2.1l stroker with JDM AVCS?

 

Plenty of 2.1 graphs

 

With TS setup?

 

That's a good graph although it seems a little laggy given nothing much happens before 4K BUT it climbs a wall then which would feel like a good hammer blow

 

thanks for the graphs, it would now be good to et some LM turbo comparisons....

If you go on the graphs that Shaun has for his LM400 and 450 the SC42 and 46 do seem to appear to make power much later and slower. Saying that, the figures are still impressive on the SC turbos.

At present i feel the LM turbos are like the Rolls Royce of twin scrolls and the SC turbos are what Harvey would call 'a belt and braces' solution

 

It's not laggy on rd but I see on the graph what your saying mate
Remember not a twin scroll no gt spec heads it's on a budget not a open wallet job ;D
Although if funds allowed lol

 

The supporting mods might be the rolls Royce of support mods too mate lol
I don't no much about the other turbos as they were very slow with their results ? And I'd by that time sorted my own .
Need graphs good n bad in all to see true best turbos

 

SC46 on a standard engine?!?! Isn't that a bit brave?

Would imagine the wick has had to be turned down a bit. Good result though, I'm just wondering whether an SC42 wouldn't have done the same with better spool?

I have one on my 2.5 and it's an unbelievably good turbo!

 

I agree, and 'on a budget' results are what i'm after. Your turbo makes great power high up the rev range. Can i ask what basic mods you had to assist the turbo when that map was done.

 

The sc42 was a pipe dream when I fitted this 46 but the plan is 2.1 stroker and 500 hp
On meth it's 460 hp 425 lb of torq
Injectors
Cheap fmic
Ported oe headers
And a lux item syvecs
Obviously exhaust full 3"
And k an n
Basic really

 

Cheers for posting that.

 

Here is our MDX321T single scroll on 2.1L

V-power and 20% methanol



V-power only




Jura

 

V nice on forged 2.1 stroker
How come @ 4 k it's making less on meth than v power
Meth adds pick up usually

 

The problem is you can get dyno`s and then you can get dyno`s. Each "can" pop up with varying results, dependant on conditions etc etc.. I`m not posting mine as its a 2.5 so it would confuse the op`s thoughts..

 

+1

2.5 here too, I have the single scroll SC46 billet so would muddy the waters further.... then you have the different mods etc... how long is a piece of string really. The SC46 billet does seem to just work nicely on most applications though. Check out the graphs on the SC thread. With a decent set up, they seem to consistently make more than the expected 460 mark on sensible (sometimes relatively modest) boost, without resorting to funny fuel

 

Not on a 2ltr they don't.... and this thread is about an OEM 2ltr.

 

Lets keep the 2.5's off this thread.

 

+1 and keep it to twin-scroll too

 

To save you flipping between threads here is mine.

OEM standard 2ltr JDM engine
BRD Induction
GT2 Hybrid FMIC
SFS inlet pipe
Billet LM450
800cc injectors
OEM ECU
VPower

Most of the graphs you see based on any of these turbos, are from runs of the dyno session used for mapping. Mine isn't and I would be confident that if my car had been mapped on the Dyno Dynamics rr, it would break 450bhp.

However... just because my set-up gets x and someone elses set-up gets y, is does not mean you will get the same... even with the same mods. This game is not that uniform.

Regardless of all this crap I still think my results are pretty impressive for a standard 2ltr.

I'm being drawn into trying a Meth map in the near future and getting the car remapped on a Dyno Dynamics to boot. We'll see...... it would be the cheapest way of potentially reaching another +10%.

Anyway.... here is the last graph:

 

The torques impressive Shaun
Oe headers ?

 

Standard JDM internals/AVCS
ID1000`s
Hyperflow FMIC with CAK
MDX321T twin scroll
Viper inlet pipe.
OEM e.c.u.

Mapped very safley 1.4 bar top end. Only thing with the graph is, the car had to be ran in 5th instead of 4th because it wouldn`t stay in the rollers. But the graph still shows the car in 4th. Don`t know how this and the lack of grip affected the graph.

 

Yes.. Untouched JDM finest!