MDX321T how much power did yours make?
20 March 2014, 08:28 AM
#61
Scooby Regular
As you say Shaun the bigport heads and cams improve the VE massively making it far easier to produce a good result from a given turbo.
20 March 2014, 08:47 AM
#62
Scooby Regular
Richard,
I would say you're about right with your figures attained then.
It shouldn't be a given that you can achieve 450bhp on these types of turbo (as GT30 cores), standard position, VPower and on a Subaru 2ltr.
I would say you're about right with your figures attained then.
It shouldn't be a given that you can achieve 450bhp on these types of turbo (as GT30 cores), standard position, VPower and on a Subaru 2ltr.
20 March 2014, 08:48 AM
#63
Scooby Regular
20 March 2014, 10:41 AM
#64
Scooby Regular
Thread Starter
iTrader: (4)
Join Date: Apr 2008
Posts: 2,272
Likes: 0
Received 0 Likes
on
0 Posts
Thanks Shaun I think I'll just have to accept that this turbo won't do what I want on this car. I'm now considering a V or an SC turbo or perhaps even a rotated set up.
20 March 2014, 11:40 AM
#66
Scooby Regular
Personally.... I wouldn't go any larger on a 2ltr. It's the reason why I've never personally gone any bigger than a LM450 Billet. For that extra umph I've resorted to 20% meth. I retain the spool and gain the extra torque and power.
Considering that mine was originally a full twinscroll set-up, I couldn't sacrifice additional lowdown urgency myself. It's a fine line between retaining the sweet spot and having a car that has to be worked to get up and go.
I'd be looking at your heads if I were you..... AVCS is an option, but I suspect won't be cheap.
Considering that mine was originally a full twinscroll set-up, I couldn't sacrifice additional lowdown urgency myself. It's a fine line between retaining the sweet spot and having a car that has to be worked to get up and go.
I'd be looking at your heads if I were you..... AVCS is an option, but I suspect won't be cheap.
20 March 2014, 12:07 PM
#67
Scooby Regular
iTrader: (2)
Join Date: May 2000
Location: Class record holder at Pembrey Llandow Goodwood MIRA Hethel Blyton Curborough Lydden and Snetterton
Posts: 8,626
Likes: 0
Received 0 Likes
on
0 Posts
I bought one of the early P18 exhaust housed MD321T 2nd hand, put it on my car replacing an Andy Forrest billet 20G - it did pretty much exactly the same numbers as the 20G - approx 410HP on Vpower, this was JGM mapping it at SRR.
That was at 1.5 bar dropping to 1.4 bar, we couldn't get it to hold any more boost and suspected a weak actuator. I then sent the turbo to Lateral to get it refreshed and upgraded to the billet compressor in original cover. Once back I then changed the actuator to a 1.2 bar one.
This is what it did at 1.7bar Vpower - 458HP - it then went on to do 500HP on Sunoco RMR (100Ron MSA spec fuel) + 20% meth.
Spec of engine, 2.1 stroker and v3 STI heads
That was at 1.5 bar dropping to 1.4 bar, we couldn't get it to hold any more boost and suspected a weak actuator. I then sent the turbo to Lateral to get it refreshed and upgraded to the billet compressor in original cover. Once back I then changed the actuator to a 1.2 bar one.
This is what it did at 1.7bar Vpower - 458HP - it then went on to do 500HP on Sunoco RMR (100Ron MSA spec fuel) + 20% meth.
Spec of engine, 2.1 stroker and v3 STI heads
20 March 2014, 12:17 PM
#69
Meth graph and boost was tapered so peak boost was at peak power, with you running a forged bottom end you could run a flat boost profile. This was an old school not billet GT3076 and with the new billet wheeled versions defo more spool and power available
20 March 2014, 12:32 PM
#70
Scooby Regular
Thread Starter
iTrader: (4)
Join Date: Apr 2008
Posts: 2,272
Likes: 0
Received 0 Likes
on
0 Posts
Personally.... I wouldn't go any larger on a 2ltr. It's the reason why I've never personally gone any bigger than a LM450 Billet. For that extra umph I've resorted to 20% meth. I retain the spool and gain the extra torque and power.
Considering that mine was originally a full twinscroll set-up, I couldn't sacrifice additional lowdown urgency myself. It's a fine line between retaining the sweet spot and having a car that has to be worked to get up and go.
I'd be looking at your heads if I were you..... AVCS is an option, but I suspect won't be cheap.
Considering that mine was originally a full twinscroll set-up, I couldn't sacrifice additional lowdown urgency myself. It's a fine line between retaining the sweet spot and having a car that has to be worked to get up and go.
I'd be looking at your heads if I were you..... AVCS is an option, but I suspect won't be cheap.
20 March 2014, 01:35 PM
#71
Scooby Regular
20 March 2014, 02:04 PM
#72
Scooby Regular
Thread Starter
iTrader: (4)
Join Date: Apr 2008
Posts: 2,272
Likes: 0
Received 0 Likes
on
0 Posts
I would get John at braveheart to make you a setup, it will be cheaper than RCM and probably fit better too. I did mine on a standard newage bottom end so played it safe with torque and only pushed it on 20% meth. However it made and easy 450bhp on v power at roughly 1.8bar
Meth graph and boost was tapered so peak boost was at peak power, with you running a forged bottom end you could run a flat boost profile. This was an old school not billet GT3076 and with the new billet wheeled versions defo more spool and power available
Meth graph and boost was tapered so peak boost was at peak power, with you running a forged bottom end you could run a flat boost profile. This was an old school not billet GT3076 and with the new billet wheeled versions defo more spool and power available
20 March 2014, 05:21 PM
#76
Scooby Regular
That's what I used to say when I owned Escort and RS500 Cossies..... however by the time I had cogged down and still waited for the boost to build, my mates STI Classic was well in front.
Lowdown torque and instant "foot down" mid range punch is king on the road.
1500rpm powerbands do nothing in the "real world", apart from smashing gearboxes, clutches, bending valves, wasting fuel and overstressing everything.
That's why I drive a diesel every day...... or is that because I'm a tight old fart.
28 April 2014, 01:14 PM
#77
Read this thread with quite some interest... here is why:
I got my 05 sti rebuilt to a 2.33 (de-stroked 2.5) and has a brand new MDX321T on it.
Engine built properly, wiseco pistons, acl bearings etc BUT I am running PPP exhaust with sports cat, HS ported headers and uppipe + also standard top mount intercooler.
What do ppl think it will make ? I expect around 400 bhp and 550 ish NM torque all this on V-power and max 1.5 bar boost.
I am running in the engine now, but nice and slowly, so probably about 2 month till i get the proper map. I must say, it builds up boost unbelievably quickly, so it is a challenge to drive it off boost. I have the feeling it is a lot quicker spooling than my vf35(which was pretty nice too and will come on sale soon btw) and earlier too. Ofc for now I only ever hit once 0.5 bar, but that was at around 3000 rpms
I got my 05 sti rebuilt to a 2.33 (de-stroked 2.5) and has a brand new MDX321T on it.
Engine built properly, wiseco pistons, acl bearings etc BUT I am running PPP exhaust with sports cat, HS ported headers and uppipe + also standard top mount intercooler.
What do ppl think it will make ? I expect around 400 bhp and 550 ish NM torque all this on V-power and max 1.5 bar boost.
I am running in the engine now, but nice and slowly, so probably about 2 month till i get the proper map. I must say, it builds up boost unbelievably quickly, so it is a challenge to drive it off boost. I have the feeling it is a lot quicker spooling than my vf35(which was pretty nice too and will come on sale soon btw) and earlier too. Ofc for now I only ever hit once 0.5 bar, but that was at around 3000 rpms
28 April 2014, 03:18 PM
#78
J:
[IMG]http://i1175.photobucket.com/albums/r633/stirich/2EAD9C7C-8347-4B5A-BFA6-439127354281-6708-
000012335B6E2A29_zps4a2cfef8.jpg[/IMG][/url]
OK here is some of the spec I'm sure I'll forget lots of it though.
Fully forged engine build originally by Advanced Automotive, but refreshed recently by Paul Finch.
Mahle Pistons Manley Rods
ACL bearings
ARP studs
Cosworth gaskets & sump baffle
CDB
V3 STI heads
Cross Drilled Nitrided Crank
RCM 740 injectors
Billet rails
Parallel braided fuel set up
Fuel Lab press Reg
RCM pulley set
RCM induction
RCM headers
RCM 3 inch decat downpipe
Harvey up pipe
Cobra 3inch track friendly system
Fadanza flywheel
AP racing clutch
6 speed box with new synchros
Gold brembos all round
Orange stuff pads
Braided lines
Hybrid FMIC
MDX321T
Laterall wired inlet pipe
Alcatec ECU with 4 maps inc Meth
JGM mapped
BC coil overs
WhiteLine drop links & R ARB
RA roof flap
Inovit Redline 18s with Hankook Ventus tyres
Set of 4 60mm Defi Advance BF gauges
Walbro in tank pump
ET underbonnet swirlpot with Bosch 044 pump
OBP big port oil catch can
Innovate AFR gauge
Depo fuel pressure gauge
Inlet manifold spacers
Reverse bonnet vent
Front mount oil cooler
Full samco water hose set
RCM oil pump
RCM thermostat
I'll add to this if I think of anything else.
Edit Reply
[IMG]http://i1175.photobucket.com/albums/r633/stirich/2EAD9C7C-8347-4B5A-BFA6-439127354281-6708-
000012335B6E2A29_zps4a2cfef8.jpg[/IMG][/url]
OK here is some of the spec I'm sure I'll forget lots of it though.
Fully forged engine build originally by Advanced Automotive, but refreshed recently by Paul Finch.
Mahle Pistons Manley Rods
ACL bearings
ARP studs
Cosworth gaskets & sump baffle
CDB
V3 STI heads
Cross Drilled Nitrided Crank
RCM 740 injectors
Billet rails
Parallel braided fuel set up
Fuel Lab press Reg
RCM pulley set
RCM induction
RCM headers
RCM 3 inch decat downpipe
Harvey up pipe
Cobra 3inch track friendly system
Fadanza flywheel
AP racing clutch
6 speed box with new synchros
Gold brembos all round
Orange stuff pads
Braided lines
Hybrid FMIC
MDX321T
Laterall wired inlet pipe
Alcatec ECU with 4 maps inc Meth
JGM mapped
BC coil overs
WhiteLine drop links & R ARB
RA roof flap
Inovit Redline 18s with Hankook Ventus tyres
Set of 4 60mm Defi Advance BF gauges
Walbro in tank pump
ET underbonnet swirlpot with Bosch 044 pump
OBP big port oil catch can
Innovate AFR gauge
Depo fuel pressure gauge
Inlet manifold spacers
Reverse bonnet vent
Front mount oil cooler
Full samco water hose set
RCM oil pump
RCM thermostat
I'll add to this if I think of anything else.
Edit Reply
Sounds almost identical to my car.. Expect I'm running a Billet 20G!
28 January 2024, 05:39 AM
#79
Scooby Newbie
Join Date: Nov 2022
Location: Uk
Posts: 16
Likes: 0
Received 0 Likes
on
0 Posts
Hi All,
Iv got an MDX321T on my 2L V3 STI & it made 430BHP on VPower which I think is low for a 450 rated turbo. On Meth it made about 450. The car is very high spec with every mod you can think of. Iv been told these turbos never make the numbers so I'm interested in what others have made on these.
Thanks, Richard.
Iv got an MDX321T on my 2L V3 STI & it made 430BHP on VPower which I think is low for a 450 rated turbo. On Meth it made about 450. The car is very high spec with every mod you can think of. Iv been told these turbos never make the numbers so I'm interested in what others have made on these.
Thanks, Richard.
Thanks
28 January 2024, 05:40 AM
#80
Scooby Newbie
Join Date: Nov 2022
Location: Uk
Posts: 16
Likes: 0
Received 0 Likes
on
0 Posts
28 January 2024, 04:37 PM
#81
Scooby Regular
Thread
Thread Starter
Forum
Replies
Last Post