Pete

Shaun,

Are you now happy with the cars current state of tune and that,s it as far as the modifications go, or is there more in the pipe-line??

MartynJ

And so it should Shaun with your trick heads, cams and another 165cc, can't wait to see the results should you do the 2.6 stroker.

I completely agree and applaud anyone who is willing to try something out of the ordinary, it keeps people on their toes and provides lots of useful info all round (whether it be good or bad).

Shaun

Pete,
The spec as it stands will not be changed for the immediate future. The car is currently having inlet mods finished and the final VPower map will then be completed (hopefully a week Saturday). Personally I think 500+ of each is more than enough for my needs and I would rather have a spec that is reliable, than trying to push the envelope for the sake of stating "look what I have now". It provides no purpose for me in reality. Saying all this though, I would like to try and get a 10's 1/4 for my own personal achievement next year. To stand a chance of getting this, I need to consider Race Fuel and NOS. This is more expense and for the purpose of only wanting to achieve it once, it may not be prudent. Upping the power stakes and throwing it all together in a standing start is asking for something to break.

No real point in me completing any testing on fuels until I am 100% sure what I want to do and whether I will actually benefit from it, i.e. there needs to be a purpose as I have no intention of running funny fuel unless it is for the drag strip..... as I simply do not need any more power for anything else.

I certainly have no plans whatsoever to change the turbo. It delivers exactly what I want and how I want. It is a real 500bhp road car, with amazing driveability for it's power. I really can not see how it can be bettered for the level it is at.

The next time that big changes may happen is when I have the engine ripped apart for inspection and re-fresh. I have always had in my mind (at this level) that would be at 20k miles. Just over 10k to do then till I hit that, which will perhaps see me in that position this time next year.

Of course, I may get bored in January and feel like swapping turbo's out again and going for something different. I will never say never.

Shaun

I have been busted..... who have you been speaking to? You can't keep nothing secret in this world!

Pete,
Ignore that comment above..... it was never said!

Jay_

Shaun, there's no doubt your car is phenomenal... the spool and low down torque is very impressive on pump fuel.

For a 2.35 the MD555 is delivering some cracking torque and low down grunt on mine as a daily driver. Not quite to your level, but all the same it will be interesting to see how the 555 delivers once a fully prepped 2.5 is completed. I think it will deliver in a very similar way to yours, but with about 30-40bhp less, which certainly gives people some more options in my book. I believe there's a 2.5/555 out there at the mo (same size unit as mine) but not quite ready yet .

I think it's great that people are trying some different turbos like AET & the 555, there's nothing wrong with some healthy competition.

MartynJ

And a bigger one Jay

Jay_

LOL, like Terry's mahoosive 555

dynamix

iTrader: (3)

Terry's doesnt count though as that is not a standard position turbo nor is it capable of being mounted in a standard position. Shame that the PDF still misleads on that basis.

Shaun's AET produced great results (even accounting for heads and cams) as did mine (on completely std heads, cams). Proven results in both cases versus lots of talk of 555's doing the business but as yet nothing on a 2.0 and nothing on a std 2.5 so in summary, nothing that can be replicated by the average SN user looking at these turbos thinking... "what shall I get?" - most people arent going to go down the 2.35 route.

I do, however, think it is a real shame that this thread has been completely hijacked from what the OP asked ... MD321H or SC46...

MartynJ

Wasn't thinking of Terrys Jay, they still do a version larger than yours to fit in the stock location, we are building the motor to test it on at the moment.

Duncan you still seem to be a little confused, do you seriously think Turbo Dynamics can't build turbos of their own that will do the business.
Every turbo I have ever had from them has made exactly what they said it would, sometimes a fair bit more.

To the op, apologies for the thread hijack, but it smacks of double standards when someone who posts how good his turbo is every time someone mentions a Green or Red is telling me off.

dynamix

iTrader: (3)

I wasnt talking about mentioning of your turbo's Martyn, just purely that the OP is looking at turbos around the 400 mark and we have all (jointly) hijacked it and moved the goalposts upwards talking about 500+ with bigger and better turbos...horses for courses.

stevie1982

iTrader: (16)

guys its all fine, the more people are willing to discuss the more we all learn.

so people seem to lik ethe MD range of turbos be it the 321's or the 555's

which woul dyou recommend for 400bhp and how do the 321h and 555 compare to eachother?

are they similar spool times and pergormance? grunt etc

regards

Jay_

Stevie, apologies for hijacking your thread Anyway, back on topic and to answer your question.... for 400bhp on a 2.0L I can't see you going far wrong at all with a 321H as it really is proven.

555 has not been tried or proven (as far as I know) on a 2.0L so therefore it would be foolish to recommend that unless you fancied trialling it (but as mentioned earlier, not many will want to go down that route for various reasons).

[Duncan... I was joking about Terry's turbo And I totally agree with your comments on the 555 only showing results on a 2.35.... for sure, the main market will be 2.5, so we'll have to wait and see how that goes when one is finished & dynoed etc]

Tidgy

only adivce i'll give you is don't be totaly blinkered by the MD series, yes there good turbos, but there are better out there

stealthy55

such as? is this based on facts or your usual "i love sc" banter

banny sti

iTrader: (68)

I love the MD turbos ride the wave of torque



Banny

jd5217

Tidgy

nope not 'i love sc' banter at all, where in my post did mention any turbo at all? (other than the MD) , what i'm saying is that there isn't a bee all and end all answer to what turbo, SN seems to have the 'i love MD' banter , but there are other options out there, thats all i'm saying

Shaun

Banny,
We have all been thrashed with Duncan's feather duster!

Unless that dyno run is a MD321H turbo, it is worthless on this thread.

dynamix

iTrader: (3)

fpmsl. Didnt mean to tell everyone off (I was including me in the hijackers though) ... it's just it looks like a mixture of power bragging and advertising, although it is bloody hard to avoid singing the praises of something that is working well. As a recent convert to the 321 world I have tried to remain fully objective. This is impossible to do as you will know from the AET side of things.

Variety is good though and like you I have been fortunate enough to try a few turbos FP green, HTA Green and now MD321V - each one has got progressively better for me but not everyone has the luxury of an extremely strong engine that seems capable of handling whatever has been thrown at it so far (cursed it now though ...bugger).

For the 400 bhp mark, most people seem to be getting to this level by stretching the std block, pistons etc. This is all well and good but giving them a bigger turbo, the temptation to then turn up the wick (because it can do it) is dangerous and will lead to blown engines and expensive rebuilds.

If it is on a built engine, then it hardly costs anything more to go for 500+ then 400-450 so it would be daft not to do it

Anyway as you were.

So Tidgy, what results have SC had on their 400bhp turbos?

Pete

Duncan,

So you reckon there,s not much cost difference in building for a 400 bhp engine compared to a 500?? so what,d cost that bit extra then, turbo yes?? i thought it was a fair bit more to go to 500 cus of different strength rods etc, maybe i,m in the dark with Subaru modding, this the first one i,ll be modding eventually so i,m learning still about them.

PS, i,m referring to a Classic too.....

Cossies & Evos i,m fine with.......

dynamix

iTrader: (3)

at 400 on a built engine, you will need gearbox, pistons, clutch, induction, FMIC etc

at 500 the only real additional cost is rods and if the engine is being built, for the sake of £500 ish you might aswell enjoy an engine you wont be worrying about. Turbo will be a cost on either build.

stevie1982

iTrader: (16)

such as mate, i am just doing the rounds at the minute seing what is good but asking people fior their own personal knowledge not just what they have read on forums extra.

i am looking for peoples honest advice on turbos they have used, so if there are better turbos out there in your opinion i would like to know what and how do they compare/ perform etc

i am lookinh for 400bhp, if my engine holds then great same fior the box but if it lets go then i will build a forge lump etc.

i am not after a turbo that can do 450-500 as tis will no doubt kill the engine i know there is a chance at 400 bhp as i said if it goes then hey but if it hold then i am quids in.

regards

Mus

iTrader: (2)

look mate it all comes to what you will use the car for, from the looks of it you seem to want to use it on the road. if you want a very fast road car on you current 2liter then get yourself a proper 18G turbo,newage top mount im sure some one will be selling one here, bigger injectors fuel pressure regulator some ported header and up upipe and you will have a rocket of a car that SPOOLS UP SO QUICK, SO RESPONSIVE YOU WONT BELIVE IT and it will be a 12 second car on the strip it wont give you 400.

but i tell you what 370/380bhp well set up car put that against 420 or 400 bhp scooby that has a bigger turbo you will destroy it on the road. sometimes its all about spool,response and mid range rather than big power.

if you want to go more than 400 and you drive hard you will have to consider 6 speed sti or PPG and a clutch that can hold all that power you got to have deep pockets for that oh and an engine and theres a lot of fabrication envolved.

but if you go for the 18G setup you will get a good life span out of your transmission and engine providing you dont take the ****. and its the cheapest and most effictive route and trust me you wont be dissapointed.

Mus

iTrader: (2)

its hard sometimes cause we all chase pub figures but end of the day if your car is responsive enough you will suprise some of the so called big power cars.

IRC450STI

Hi mate as i said earlier in this thread, i have used both MD & SC on a WRX 2ltr with forged internals etc, started with the the MD321H and that was 400/380 then changed to SC42 which produced 400/400 same engine same boost so i stuck with it but if i got better results from MD i would of changed back as i had that option at scoobyclinic thats my experience, but its your personal choice at the end of the day, SC & MD are about the same price

stealthy55

Hi mate as i said earlier in this thread, i have used both MD & SC on a WRX 2ltr with forged internals etc, started with the the MD321H and that was 400/380 then changed to SC42 which produced 400/400 same engine same boost so i stuck with it but if i got better results from MD i would of changed back as i had that option at scoobyclinic thats my experience, but its your personal choice at the end of the day, SC & MD are about the same price [/QUOTE]
so you bought a scooby clinic turbo from scooby clinic and it produced better figures on scoobyclinics rollers?

IRC450STI

Im using the SC46 at moment on a STI 8 conversion in my WRX and i think its a little to big for a 2ltr cos i think the MD321H & SC42 spooled quicker and came on boost abit sooner, and yes ive got more BHP & torque now but they still felt quicker so i might go back

IRC450STI

so you bought a scooby clinic turbo from scooby clinic and it produced better figures on scoobyclinics rollers?[/QUOTE]Got both MD & SC turbos from them and both mapped by them.

dynamix

iTrader: (3)

According to your 'My Scooby' page you have an SC46 producing 421/408. I thought that was their 460 bhp turbo - have they now downgraded it and dropped the SC42 as I cant see mention of the SC42 on their website anymore and seem to be suggesting the SC46 for everything from 380 to 420 on the 2.0L ?

Mus

iTrader: (2)

lol im sure they wouldnt mess about with the rollers for a sake of a few 100 quid and risk there reputation.

what would also be a good comaparison maybe post both graphs to see whats better in terms of spool and curve.