Stevesbluewrx

iTrader: (4)

Lunar,

I would love to add Meth to my map but I have no where to store meth. The thought of it catching fire and not being able to see the flames puts me off.

I assume your car is a Blob STi matey? Blobs seem to make better power than bugeyes to be honest. That's good power on a H though.

I think the thing putting me off of going that next step is a engine build. I've spoken to enough people regards what the STi can handle on standard internals. For my style of driving I think I'll be ok if the map took me to a safe 450bhp and 410lbft.

But who knows. Every engine is different as are right foots.


Just don't tell Mrs Gimp Angus.......


Steve

lunar tick

iTrader: (2)

Steve - standard internals are very good indeed provided all is mapped correctly. I've done over 40,000 miles on standard internals at 400+bhp (Zen mapped) and the engine still runs as sweet as a nut - virtually no oil usage between changes and excellent compression on all cyclinders

Stevesbluewrx

iTrader: (4)

Cheers matey. That's very refreshing to know you have done 40,000 on the mods etc.

In regards the meth. Was your 10% addative? I'm using 100mls of NF at the mo but the problem is it's pretty pricey as I buy in bulk.

Steve

lunar tick

iTrader: (2)

I use between 10 and 15% methanol. It's mapped for 10%, so a little more gives me a slight leeway. Meths also costs just 80p per litre, so it can actually work out cheaper in the long run. There is of course the hassle of taking a 5L can of meth along to the filling station but it soon becomes a habit And if you ever can't add methanol for any reason once the car's been mapped for meths, it's quite OK to run the car on straight V-Power provided you don't use full boost and high revs. For example, my car is mapped to 1.7 bar midrange, tailing to 1.6 bar. If I can't add meths for any reason, keeping the boost below 1.1 bar is fine and produces no knock at all

petedotuk

Got the SimTek fitted the other day and the car is running awesome! but it had to be capped @ 1.45bar as I am running the standard top mount and the intake temps were over 60* @ 1.6bar! My mapper tried to compensate for high temps by setting it a bit rich but he said the 650's were hitting 100% so he ended up lowering the boost.

Guess I'll be fitting a FMIC as soon as the wallet recovers then onto a set of rollers.

Eacy

iTrader: (9)

Hi A little question from denmark..
Got a 1995 Jdm Wrx
I am going for a 2.5 short block from 07,with version 3 heads. Piston upgrade and conrods and berings with arp bolts. Samco inlet hose on a Md321S. Headders and uppipe is from Zen. 740cccm injetors and a 255 walbroe fuelpump,endnig in a 04 6 speed sti gearbox, all going to be mapped by Mr.Andy Forrest, so I am going on a little joiney in Marts...
What can I expect of Hp and Tq, and what is the lowest boost the turbo can make, for going to MOT ??

Thanks Lars

mikey30

running an md321t on my 05 sti and getting 375bhp for 1.5bar but way down on torque at 320lbs....gonna go steel build next year and run the turbo on higher boost.have to say they are a great turbo and well impressed with my dealings with mark at lateral......

Anders_WR1

iTrader: (8)

I'm on about 350lbft with MD321H running 1.55BAR on V Power, what supporting mods are you running? I take it the power figure is ATW?

Anders

fastboyslim

iTrader: (2)

Love this thread, good info.

petedotuk

I know this was posted a while ago but...

Very hard to get super unleaded in the Republic of Ireland so I guess it's the fuel quality letting him down if he isnt using additives.

Rob Day

iTrader: (78)

Thread revival::

I have a UK 2002 STI, and its currently standard bar an uprated clutch and wheels that have added recently. My intentions are MD321, full 3" decat, CAI, Walbro, whilst running standard headers, tmic and injectors. What could I expect do you think?

Without number chasing I was was hoping 375+ was achieveable. If a MD321 falls outside my affordability I may stump for the 20G.

Comments please

Thanks,
Rob

jura11

iTrader: (7)

Hi Rob i think standard injectors with FPR will be fine,headers will be fine at your tune(GT Spec are good and sometimes you will find these for good money used),CAI depends which one(RCM big cone will be for me weapon of choice),TMIC are good for 450BHP on some applications.
375BHP will be achievable with 20G(good and genuine),MD321H is good for 400-410BHP,MD321T are good for 450BHP.
I think best from both will be MD321H and second will be AFP20G.
I think with your setup will be achievable 375bhp+ on both turbo's.


Jura

joz8968

iTrader: (13)

Comes down to, as as you say, how much you want to pay. The 321H should always make at least that amount, and maps really well, etc. Bob Rawle loves mapping them - as do many other mappers - as they produce the goods time and again. But expect to pay upwards of £900 for a decent 2nd hand one.

One of AF's or harvey's 20g, brand new, will be similar money, and should also make 375, but is more of a hit and miss affair with respect to sensitivity to supp. mods etc. That said, you'd be disappointed if it didn't make, say 365, as a minimum! (Both turbos are rated at 380-400 odd).

I think the 321H has even more sustained mid-range thrust than the 20g, and it's about the same in spool-up (I think).

Go for the 321H if money no problem (esp if bought NEW from Lateral). If not, the 20g mentioned is also good.

What about the 360-380 rated 18g from AF or harvey? Full like-for-like max boost happens about 300rpm earlier than the other two...

Rob Day

iTrader: (78)

[quote=joz8968;9823081]The 321H should always make at least that amount, and maps really well, etc. Bob Rawle loves mapping them - as do many other mappers - as they produce the goods time and again. But expect to pay upwards of £900 for a decent 2nd hand one.

Go for the 321H if money no problem (esp if bought NEW from Lateral)

https://www.scoobynet.com/private-fo...37-md321s.html

Thought on the 'S'

jura11

iTrader: (7)

[QUOTE=UK300 PRODRIVE;9823165]Hi Rob this turbo will make 450BHP,but you will need supported mods like FMIC,headers,650cc with FPR at least.
And if you are selling VF35 contact here stevie turbo looking for VF35 https://www.scoobynet.com/member.php?u=111016


Jura

joz8968

iTrader: (13)

That S is prob overkill for the OP's requirements - but the mapper could obviously temper the boost pressure so as to obtain <400bhp.

Depends at what rpm that mapped boost pressure comes in at. If less than 4,000rpm, then it'd be better than a 20g, for example - and all with the S's scope for 'project creep' to boot! But I'm guessing that the S is possibly laggier(?)

Rob Day

iTrader: (78)

[quote=jura11;9823284]Cheers Jura, I need to run the VF35 for a while when I get my car back to make sure its running fine, so the Turbo is on the back burner for a few weeks / a month... I have Pm regardless though

The 'S' doesnt get talked about very much, is this really for the bigger forged stronger builds?

When I say I would be happy with 375>, and im not hooked on nubers, well I mean more the better, but obviously want to be safe. I believe the Standard STI TMIC is good for 400 and a little more?

I very much doubt this car will see beyond the "current standard engine", so <450 is a definate. Beyond this I will definatly change the car im afraid.

Rob

joz8968

iTrader: (13)

Also don't rule out the Scooby Clinic's billet comp wheel turbos (30% lighter - spools up quicker) - the XT-R range:-

SC36 (based on a 16g) - up to c.360bhp.
SC38 (based on a 18g) - up to c.380bhp.
SC40 (based on a 20g) - up to c.400bhp.

SC46 (based on a ???) - up to c.460bhp.

Those figures are based on 99 RON fuel (and obviously app. supporting mods).


Also, RCM do an equivalent range of std fitment turbos......

typeRv4

[QUOTE=UK300 PRODRIVE;9823165]I understand the S was replaced by the "T" in the model range.

Made good power but abit laggy.

joz8968

iTrader: (13)

worbs described the S as being between the T (450) and V (500), so would be equivalent to the T+ (475).

If you were to buy it, you'd also need Lateral or RCM 76mm intake pipe (that S is fitted with a 76mm intake collar)...

stevemoir

iTrader: (24)

Car - MY03 Sti Type UK
MD Variant - 321T (soon to be billet)
Supporting Power Mods - 2.0 Standard Engine / Perrin Fmic with Perrin Big Maf / Lateral 850's / Kakumei Headers with Harvey Uppipe / AVCR
Max boost by what RPM - Unknown Road Remapped By Dynamix
Max power by what RPM - Unknown Road Remapped By Dynamix
Max torque by what RPM -Unknown Road Remapped By Dynamix
Drivetrain Mods - AP Racing Clutch.
Other comments - 2 Maps - 1 x V Power 1.7 bar / 1 x V Power + 15% Meth 1 .7 Bar

Apostle

Regarding all the above posts - this is all good info... thanks.


BUT... how comes some have MD321V making full boost at 3400 and then some post up for MD321H making full boost at 3400 too ? (when does the V begin to spool ?)

When the thread started it was specified what rpm was max boost made but 'not so many' people have given this info.


Previously I had read that Andy F's car with a MD321T made full boost at 2700rpm - did email twice asking was it the standard turbo or a modded AF special - never got any replies...

For me max power is no longer the only consideration but how it drives.


I want a 400 -450 bhp turbo which spools QUICKER than my current VF48 (hatch Sti with forged rebuild).

I "understand" the SC 46 spools EXACTLY the same as the VF48 but will make 430 - 460 bhp pending on mods tmi v fmi etc.

But what would be a 'better spooler' and still produce the goods ?

The MD 321T seems a well proven turbo, but reading this and other threads it spools to full boost from either 2700rpm upto 4000rpm.

This seems very inconsistant ? is this the mapping ? Supporting mods only ? Pinnochio performance conversion...

BTW - Mine is a Enginetuner 2.5 forged build with RCM GT2 spec wrapped headers, Harvey hybrid up-pipe, H+S decat d/p with PPP backbox, Forge CAIK, opened up / ported and polished heads, etc currently @ 365/430 on Enginetuner R/R. (top guys down there)


So a few questions for the experienced please.

How many peeps have full boost by 3000rpm on their MD321T ?

What supporting mods aid early spool ? (harvey up-pipe, Perrin intake silicon)

Any advice helpful... I'm sure many who read this thread would really appreciate some 'wisdom'.

Ta

A

MartynJ

In my experience John you will struggle to get both. Any turbo that offers more spool will fail to make the same power. If of course you downgrade your power requirements, the choices are many.

Martyn

Apostle

Thought as much Martyn.....

Its just that as much as more power makes it a better car - so would earlier spool.

To have an SC46 give 420 + easily at the same spool would be good but better would be reducing spool by 500rpm again.

The SC40 too small and is sleeve bearing... what we need is a SC43 with roller bearing technology.

A 10% upgrade in power would take me to 400 which seems hardly worth it....

When I decide what to do and have the money for it - I shall be booking it in Martyn.


What we need is people with lots of experience of the MD555 series turbos ... or is it ?

A

banny sti

iTrader: (68)

Full boost on the road was at 2800rpm, 2.5 MD321T+

RA Dunk

Most of it would be down to final displacement TBH, some are on 2.0 builds, some 2.1, others 2.3, and the rest 2.5, then theres the AVCS heads thing as well some will have them others won't.

Between the above there will be a massive difference in performance with the same turbo, they will all make the figures but some will make them lower/better than the others.

joz8968

iTrader: (13)

...Also, are you comparing the same like-for-like 'full boost'. Full boost on one car might only be mapped to, say, 1.3bar. Whilst on the other, it could be 2.0bar, for example!

See where I'm coming from? Must compare apples with apples.

Apostle

Banny.... that's an incredible graph. Ballistic and quick on the up - wow !

harvey

iTrader: (48)

What you want is the Holy Grail of Subaru tuning and every other car turbo tuning I know of and with your name you might be closer to getting that than us mere mortals.

joz8968

iTrader: (13)

Class.