Assuming all other appropriate supporting mods, then...

For a 2.0L ODB running on 97 RON ONLY, which turbo - and at which boost level - will produce 400+ bhp?

Thanks in advance.

 

wow, how longs a piece of string? all depends

td05 20g is a 400bhp turbo

 

td05 20g is unlikely to get to 400bhp on 97 ron fuel.

Mine made 380bhp on V Power

 

With a Md321H, i made 401 bhp running 1.45 bar

 

but what fuel?

 

Yes, this is the crux of my question. I only want to use 97 so am prob a rare case in this regard.

I'm thinking it might actaully take a 321T (450bhp-rated when on V-Power) to do it... So when running it on 97, power/torque will obviously be less, but should still make 400?

Can anyone else see where I'm coming from?

 

you may have a problem with weaker parts within the motor, is it a standard engine or rebuilt?

 

321H will see you 400bhp on v power with excellent low spool
the 321T on a 2ltr is a bit laggy

 

JD I would imagine it has forged internal (Joz's signiture states zen built EJ20)

I think on a 2.0l i would still want to use the MD321H over the T and I reckon it would still be the quicker car in the real world. on the dyno or down the pub the MD321T would win but does that matter?

 

what about on 97?

 

there are other turbos around other than the MD range, maybe worth speaking to a few tuners for their opinions.

 

didnt spot that.

 

How comes your going to all this trouble and running 97ron fuel? Is v-power etc hard to get near you?

 

Yeah, I here you all.

It's looking like I'll have to settle on a 321H (or maybe 20g - to save on half the cash) and except less than 400.

I agree Shmerman, it's wholly wrong to introduce added lag/knackering drivability, etc. by getting a bigger turbo, for the sake of chasing numbers.

BTW, how much is the HS420?

[And yes, the ZEN motor is a OBD 2.0L with STi v.3/4 forged pistons; STi v.9 forged rods; ACL Race Series mains/bigs; new rad; new water pump; Zero Sports 71deg stat. ]

 

Snigger.

Yeah, I know it looks like I'm making the situation harder for myself (which I suppose I am! ), but I can't be bothered to always think ahead to make sure I must get to a Shell garage when low on fuel etc... I just want to be able to stick in Esso/Texaco 97 - or of course V-Power when possible - and hoon; no pfaffing around.

(FTR, my nearest Shell garage is only 4.8 miles from my abode! )

 

I know what i would be doing mate. Why dont you get a simtek with switchable fuel maps, or cheaper still just keep the thing full of v-power. Its not that hard to do mate tbh Of course there could well be more shell garages in my part of the world

 

My car is mapped for v power and it doesn't like anything else. I always carry a bottle of octane booster in the boot just in case I am running low and there are no shell garages in sight.

This works fine for me the 1% of the time I cannot get v power.

 

Yeah, I suppose I'm being too lazy.

As I say, my local Shell is only up the road - compared to other people.

I've got into the habit of only sticking in 20 quid a time... If I were to brim up like normal people do , then it won't be nowhere near a bind. It's a psychological thing - I hate committing that amount of cash to fuel in one go (mind, it's not as if it hangs around in the tank for long with an Impreza, is it... ).

 

I carry octane booster too !

But I put it in the V-Power



dunx

 

Yep, looks like there's gonna have to be a serious step-change in my fuel-based mindset, then.

 

hey joz,id make sure u get those plugs checked otherwise 400 bhp wont be possible,no matter what turbo u use!

 

New ones will go in for sure.

 

Lag is totally under rated I'll put my laggy turbo up against your quick spooling 20g/321h turbo and make you look like your parked up when I accelerate past you! Don't confuse lag for a slow car as its not the case

 

Only want to use 97 ron........

I'd love to do that

I have 99 ron
Methanol
NF

Every tank full has its stares of beweilderment especially if I put the methonal in Lucozade bottles

 

Ah, a man with big power speaks. Yes, that's what I thought too. I don't mind that 'old-school' turbo power delivery if the pull on-boost is well worth it, compared to having a less laggy, smaller turbo.

Steve, do you reckon it'll be worth sticking on a MD321T - hell, even a V! - then (bearing in mind it would be running STi v.3/4 non-AVCS heads on a 2.0L).

 

I would go with a 321t as it will future proof you a bit more!The 321h is more for a standar engine and since yours is uprated I reckon you will hit full boost on the 2ltr by say 4000rpm but it will be fun when it starts to pull. If you want instant boost just drop a gear and you will soon see how big a grin you can have.

There is a thread on scoobynet somewhere about terryb's car and he ran a 321t on a 2ltr with great results

 

That's got me hunched over rubbing my hands in anticipation now. Do you know what keywords he had in that thread title so I can find it easy e.g. did he have "...MD321T..." in it, for example?

For that nugget of info (and if you haven't got one from Nengun already), I'll do you that A'PEXi BCS for what you offered...?

 

MD321t is the way forward (biased of cause as I'm selling one ). The 321H is a 400bhp turbo. The 321t is a 450bhp turbo. I'm runing a 321t on standard internals (sti 8) at 410 bhp 340ft lbs (1.5 bar which most people would agree is very safe) and chrisdicko is running his 321t at 440bhp 370ft lbs (standard internals sti8). 400bhp was last year on standard internals, lol .

Yes the 321t does spool up slightly later, but when you change gear at 6500rpm does your engine drop below 4000rpm? From first hand experience I can confirm there is no lag on my 321t when I'm going through the gears (don't confuse later spooling with lag). All my opinion of cause. As Steve said your future proofing as well.

 

Spot on that man. I'm running my MD321T on my02 STi with standard internals. At present I am running 402.5bhp / 359lbft (surrey rolling road and mapped by JGM) and thats with OEM TMIC and 550cc injectors still. So in effect I am saving myself another turbo change when I take it to the next level at 450bhp.

I find the "T" pretty late in terms of get going but its ideal for everyday use that I use the car for.
Motorways are another story. Holy sweet jesus!!!

Steve

 

Lag is a term used far too loosely IMHO.

It's the response between gearshifts which can make a difference.