stevie1982

iTrader: (16)

looking for a 400bhp or there abouts turbo and was looking to get the md321h for my p1 but was looking at the scoobyclinc SC46 anyone use one of these?

how do they compare?

any opinions on either turbo which would you go for?

will be running supporting mods, injectors, fmic, induction, simtec etc

regards

scoobysmiff

iTrader: (2)

or an FP Green mate, they are an option form scoobymania/Area 52

dynamix

iTrader: (3)

MD321H wins on response/torque

jd5217

or the MD555 range

banny sti

iTrader: (68)

Go for what best fits your financial situation

Bannjy

IRC450STI

I use to have the MD321H on my old 2ltr WRX forged built engine mapped to 400BHP & 380ftlbs and is a very good and reliable turbo, now i have the SC46 on a STI8 engine and is producing 421BHP/408ftlbs but i think they are different turbos cos the MD is a 400+BHP turbo & the SC is a 450+bhp turbo I think, but im sure someone will correct me, I do know that clinic do a SC42 which is a 400+BHP turbo which i also use to have on the 2ltr after the MD and it produced 400/400, Hope this helps a bit

stevie1982

iTrader: (16)

cheers guys. i was looking at the md321h as this seems to be the turbo everyone is raving about at the minute. i am trying to get an idea of what or which is the best performing turbo so was looking for some advice from who has got one fitted be it the md321h, sc46 (42), fp etc. what figures they made and how do the deliver the power etc

regards

Jay_

I ran a 321H on a 2.0L to about 410/380 and couldn't fault it. very quick spool for a 2.0L and the stated power level. From memory peak boost was achieved around 3700 and held right through the rev range.

Don't know any results of MD555 on 2.0L yet but it might spool quicker.... depends which combination of hot/cold side you opt for as Turbodynamics are offering a range of power levels from 380+. Be interested to know what they do on a a 2.0L. MD555 is very nice on my 2.35 though.

Sorry, no experience of the SC turbos.

andy97

iTrader: (1)

I know doubt the SC46 is a good turbo, but maybe not as good as the MD321H.

You might want to consider customer relationship aswell, when choosing you desired specialist.

IRC450STI

The MD321H & SC42 are similar turbos with aprox same power output.
The MD321T & SC46 are similar turbos with aprox same power output.
I THINK
All very good turbos IMO with the right mods to back them up they are awesome

stealthy55

whose got one of these fitted? how do they compare to sc or md3 series?

dynamix

iTrader: (3)

Is yours an MD555 JD ?

I didnt think it was ??

MartynJ

No m8, JD has the earlier MD195s which is essentially a 400-450hp rated turbo and has the old weld on exhaust housing.
He is making a very nice 446bhp @ 1.5 bar on 10% meth on his stock bottom end, it has been faultless for over 16 months.
The new units are faster spooling, and you can have your pick of outputs from 380- 500+ as you are probably aware.
I fully expect them to be selling like hot cakes once the full results from the latest rounds of testing are complete.

MartynJ

http://www.turbodynamics.co.uk/downl...er_results.pdf

stealthy55

when is testing likely to be complete? i want a turbo but as always theres too many turbos to choose from

MartynJ

If you read between the lines you will note that, Turbo Dynamics make the 555 series aswell as the 321 series.
You can buy one from Lateral rated at 400hp, or you can buy one from TD rated at 400hp, I doubt there would be much (If anything) in it in terms of output, spool, reliability.
There may be £50 in it either way, but you could always try and negotiate a discount with one of Td's dealers.

Jay_

Thanks Martin, you found my graphs for me

I'm running a 555 and the results are published on the Turbodynamics site and also a thread posted on SN and 22B a couple of weeks ago.

MartynJ

No sweat Jay

Jay_

Martin... you'll be interested to know I've had a fuel pressure problem and various leaks on my exhaust manifold, so there might be a fraction more in there once sorted.

MartynJ

I don't doubt it for a second Jay.

dynamix

iTrader: (3)

Have any of these 555's been fitted as a straight bolt on and compared with a MD321H that again has been just bolted on to a 2.0L ?

Are there any head or cam changes on your 2.35 Jay ?

MartynJ

Not to the best of my knowledge, unless someone is willing to do it on the same car it would be of little use. Too many variables in one engine to another.

Jay_

Duncan, afaik a 555 hasn't been run on a 2.0L yet. I've run an H on my 2.0L, but then switched to 2.35 with the 555 so not a direct comparison by any means. Besides the 555 I've got is definitely bigger than a H by some way.

Am still running standard JDM STI heads Duncan, but I'd really like to do some work on these next year if I can. Aren't you still on standard heads too?

dynamix

iTrader: (3)

Yeah 100% std heads/cams for me too. They seem to cope pretty well even over 500bhp.

Surely someone has run the 555 on a 2.0 ?

MartynJ

I would have put one on my stroker but Turbo Technics let me have a T38 hybrid to try before Craig mentioned it.
For us to try one means getting a customer to volunteer their car with all the liability that involves, and in the current climate paying staff to fit a turbo just for a trial doesn't make good business sense.

Shaun

Nice results on the MD555..... a bit to go to catch up with some though.

Pete

Martin,

I hope you have better success on your TT T38 than i did on my cossie, hated how that turbo worked, lag, on my god.. then again, different set-up etc so you might find it fine. When is it coming on boost??

MartynJ

We have run the T38 on a couple of 2.3 Evo's very successfully, virtually no lag at all and 500+hp has been seen on Evo 9s on pump fuel.
Even the smaller T36 version has made 475bhp on an Evo 6.

Too early to know for certain on the Scoob as the engine has only done 35 miles so far, lol, feels really strong though at the moderate amount of boost I am using to run it in on.

MartynJ

Not really Shaun, Jay only has a mid sized one after all, they do a larger version which is still stock location.

Shaun

Martyn,
Whilst I appreciate that other sizes exist, Jay is still pushing a good wedge of boost to achieve those figures. As I found out, the peak figure is the easy(er) bit to achieve.... the response and lowdown grunt is something entirely different and harder to come by, the higher up the bhp range you go.

My set-up provides lowdown grunt that I have yet to see beaten on anything producing the same kind of peak figures on a bolt on / VPower. I am not suggesting nothing exists, but I have yet to see it.

This is never easy and I don't care for what a manufacturer states as being possible... it only really counts when it is on your set-up and doing it (I learnt the hard way).

I have got through 4/5 turbo's in the past 18months, testing various combinations and as you suggests this attracts a cost that needs to be justified. I could still keep going as there is a different comp wheel to try, but I think enough is enough for me. AET have certainly done their bit as far as I am concerned.

At the end of the day, all of this discussion about turbo's is good. More and more information is coming through from people testing, which is great for everyone else.