litchfield twin scroll turbo
17 January 2011, 07:39 PM
#751
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I just thought I'd update this thread to say that :
I've had the 420 on with the injector upgrade for about a year now on my MY05 JDM STi (without CAI or FMIC - approx 400hp) and I still LOVE IT.
I drove a JGM mapped MY06 JDM STi the other week (ie in a good state of tune) .. and whilst still a nice drive .. it just didn't have the grunt or top end that mine does.
So .. my conclusion ?? If you're not into chasing numbers and want a bloody good drive without the severity of some of the more powerful cars, I'd say 400 is about the place to aim for.
Gotta go ... off to get some more smiles ........
I've had the 420 on with the injector upgrade for about a year now on my MY05 JDM STi (without CAI or FMIC - approx 400hp) and I still LOVE IT.
I drove a JGM mapped MY06 JDM STi the other week (ie in a good state of tune) .. and whilst still a nice drive .. it just didn't have the grunt or top end that mine does.
So .. my conclusion ?? If you're not into chasing numbers and want a bloody good drive without the severity of some of the more powerful cars, I'd say 400 is about the place to aim for.
Gotta go ... off to get some more smiles ........
I'd hope you noticed that 50 lol
17 January 2011, 08:35 PM
#752
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I am up at Litchfield's this Friday getting some more modification work done to the JDM Hawkeye, which was unfortunately post-poned prior to xmas because of the bad weather. I will endeavour to get an update on the Billet turbos, as that is an area I will be testing.
Being honest here, I would suggest that if 400bhp was your target then the LM400 is much better suited. It spools quicker for certain and also makes the 400bhp without the need for a different intercooler or change from the OE airbox.
I just thought I'd update this thread to say that :
I've had the 420 on with the injector upgrade for about a year now on my MY05 JDM STi (without CAI or FMIC - approx 400hp) and I still LOVE IT.
I drove a JGM mapped MY06 JDM STi the other week (ie in a good state of tune) .. and whilst still a nice drive .. it just didn't have the grunt or top end that mine does.
So .. my conclusion ?? If you're not into chasing numbers and want a bloody good drive without the severity of some of the more powerful cars, I'd say 400 is about the place to aim for.
Gotta go ... off to get some more smiles ........
I've had the 420 on with the injector upgrade for about a year now on my MY05 JDM STi (without CAI or FMIC - approx 400hp) and I still LOVE IT.
I drove a JGM mapped MY06 JDM STi the other week (ie in a good state of tune) .. and whilst still a nice drive .. it just didn't have the grunt or top end that mine does.
So .. my conclusion ?? If you're not into chasing numbers and want a bloody good drive without the severity of some of the more powerful cars, I'd say 400 is about the place to aim for.
Gotta go ... off to get some more smiles ........
18 January 2011, 01:24 PM
#755
As will mine too, for its "special" service 
Oh plus to get some suspension goodies fitted at the same time.
Shaun,
Iain said that you will be trying those new adjustable top mounts on your car??
As im hoping to get these fitted to mine aswell, when it goes in for its service. Wouldn't mind some feedback once you get it done.
Also getting Iain to setup the geometry for a nice fast road setup so can use the car to a bit more of it potential on the track without the on road feel being compromised.
Mel
Oh plus to get some suspension goodies fitted at the same time.
Shaun,
Iain said that you will be trying those new adjustable top mounts on your car??
As im hoping to get these fitted to mine aswell, when it goes in for its service. Wouldn't mind some feedback once you get it done.
Also getting Iain to setup the geometry for a nice fast road setup so can use the car to a bit more of it potential on the track without the on road feel being compromised.
Mel
18 January 2011, 08:58 PM
#756
Scooby Regular
Hi Mel,
Been there and done that! It does what it claims to do.
Read my project this page on my project thread for an update on that specific modification. https://www.scoobynet.com/846290-sta...hawkeye-9.html
I am back up at Litchfields this Friday to move forward with more chassis mods from Whiteline.
Been there and done that!
It does what it claims to do. Read my project this page on my project thread for an update on that specific modification. https://www.scoobynet.com/846290-sta...hawkeye-9.html
I am back up at Litchfields this Friday to move forward with more chassis mods from Whiteline.
19 January 2011, 08:37 AM
#757
Thanks Shaun,
Whiteline Adjustable top mounts!!!! SOLD!!
To be honest Shaun, the car is foremost to be used primarily on the road, bit like yourself really.
So these top mount will hopefully give me the best of both worlds, nice performance on the track with improved/better performance on the road.
Track days for me are only about 2 a year so not after the bone shaking experience that comes with uprated suspension, as i find the standard spec c suspension more then capable for what i need it for.
I just think with the right chassis mods, i.e ARB's, F+R Droplinks, ALK and these top mount with a good geometry setup should see the car transformed into what im looking for.
Combine that with the extra performance that i now have, im pretty much where i want to be with the car, although a nice set of brakes wouldnt go a miss!! this modding lark never ends!!! LOL
Roll on Snetterton 20th Feb!!
Mel
Whiteline Adjustable top mounts!!!! SOLD!!
To be honest Shaun, the car is foremost to be used primarily on the road, bit like yourself really.
So these top mount will hopefully give me the best of both worlds, nice performance on the track with improved/better performance on the road.
Track days for me are only about 2 a year so not after the bone shaking experience that comes with uprated suspension, as i find the standard spec c suspension more then capable for what i need it for.
I just think with the right chassis mods, i.e ARB's, F+R Droplinks, ALK and these top mount with a good geometry setup should see the car transformed into what im looking for.
Combine that with the extra performance that i now have, im pretty much where i want to be with the car, although a nice set of brakes wouldnt go a miss!! this modding lark never ends!!! LOL
Roll on Snetterton 20th Feb!!
Mel
19 January 2011, 09:48 AM
#759
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I don't know .. what are you guys like ....
All I was saying was that I've had the upgrade to about 400 .. and I love it ... as it's not too harsh, but it is quite quick. That's it.
Yes .. I could have gone for the 400 version, and maybe it would be a better option for what I have now, but being one of the 'early adopters' I didn't know that when I bought it, plus, I have headroom to add the CAI and/or FMIC if I get bored to bring it up more.
"The End"
All I was saying was that I've had the upgrade to about 400 .. and I love it ... as it's not too harsh, but it is quite quick. That's it.
Yes .. I could have gone for the 400 version, and maybe it would be a better option for what I have now, but being one of the 'early adopters' I didn't know that when I bought it, plus, I have headroom to add the CAI and/or FMIC if I get bored to bring it up more.
"The End"
19 January 2011, 10:11 AM
#761
Sorry Tim - wasnt implying that all suspension upgrades will make the car worse tbh was going on more on past experiences with suspension upgrades.
But then again AST aren't exactly cheap so would expect good results from them.
Maybe at a later date and when funds permit i can upgrade to them, but for now i think the top mounts will have to do.
Mel
But then again AST aren't exactly cheap so would expect good results from them.
Maybe at a later date and when funds permit i can upgrade to them, but for now i think the top mounts will have to do.
Mel
19 January 2011, 01:25 PM
#762
Scooby Regular
Mel
Only look at upgrading the suspension when you really need to imo. It is not a knee jerk decision to make, because everyone else does it. Hence the reason why I am looking at various chassis mods WITHOUT touching the suspension.
I will be interested to see how my car handles on track without suspension mods.... I bet I can be quicker on track with more tuition than I will be swapping the suspension out!
T20Driver,
Didn't mean to upset you with my comment. Apologies if I have.
Only look at upgrading the suspension when you really need to imo. It is not a knee jerk decision to make, because everyone else does it. Hence the reason why I am looking at various chassis mods WITHOUT touching the suspension.
I will be interested to see how my car handles on track without suspension mods.... I bet I can be quicker on track with more tuition than I will be swapping the suspension out!
T20Driver,
Didn't mean to upset you with my comment. Apologies if I have.
19 January 2011, 05:30 PM
#763
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Don't worry Saun .. neither you .. nor Simon did .. not really.
Just wasn't expecting those responses .. however true they may be ..
As I say .. I was simply "sharing" that I am a happy bunny with my upgrades as it is a day 2 day car that does about 14k per year and the occasional track day .. and imo the power is about right for those potentially opposing uses
Just wasn't expecting those responses .. however true they may be ..
As I say .. I was simply "sharing" that I am a happy bunny with my upgrades as it is a day 2 day car that does about 14k per year and the occasional track day .. and imo the power is about right for those potentially opposing uses
20 January 2011, 08:22 AM
#764
Mel
Only look at upgrading the suspension when you really need to imo. It is not a knee jerk decision to make, because everyone else does it. Hence the reason why I am looking at various chassis mods WITHOUT touching the suspension.
I will be interested to see how my car handles on track without suspension mods.... I bet I can be quicker on track with more tuition than I will be swapping the suspension out!
Only look at upgrading the suspension when you really need to imo. It is not a knee jerk decision to make, because everyone else does it. Hence the reason why I am looking at various chassis mods WITHOUT touching the suspension.
I will be interested to see how my car handles on track without suspension mods.... I bet I can be quicker on track with more tuition than I will be swapping the suspension out!
21 January 2011, 07:55 PM
#765
Scooby Regular
**Hot off the press Newsflash**
After an extensive testing / development period of approximately four months, I was informed today that:
LM450 Billet is now available
LM400 Billet will be available in approximately 2 weeks (could be sooner)
LM500 Billet will be available in approximately 2 weeks (could be sooner)
I will be upgrading my current LM400 (non Billet) with one of these (not saying which one yet lol) for the JDM Hawkeye as soon as. Details to follow on my project thread (in the usual **** comprehensive way lol) when this takes place.
I'm looking forward to this one!
After an extensive testing / development period of approximately four months, I was informed today that:
LM450 Billet is now available
LM400 Billet will be available in approximately 2 weeks (could be sooner)
LM500 Billet will be available in approximately 2 weeks (could be sooner)
I will be upgrading my current LM400 (non Billet) with one of these (not saying which one yet lol) for the JDM Hawkeye as soon as. Details to follow on my project thread (in the usual **** comprehensive way lol) when this takes place.
I'm looking forward to this one!
but than to say I have the billet, which benefits it give on lm400?
22 January 2011, 11:54 AM
#767
Scooby Regular
No point in me "suggesting" what it will do.... I need to test first. But better spool and response are on the cards, for this turbo specifically (LM400). Spool and response are key for a road car and any extra power is a bonus in my book.
I have been given some test data on the LM400 Billet, so I hope the real world results I will achieve will replicate this data.
I have been given some test data on the LM400 Billet, so I hope the real world results I will achieve will replicate this data.
Last edited by Shaun; 22 January 2011 at 11:56 AM.
22 January 2011, 12:31 PM
#768
FWIW, my understanding from Iain regarding the billet wheels is that spool should be much better at part throttle, but he cautions that it might be worse at full throttle - something to do with the volume of gas vs the (reduced) inertia of the wheel.
Peak power should be the same as the non-billet versions.
Like Shaun, I'll know soon - once Iain has contacted me with a date for the repair and rework (hint hint
)
Peak power should be the same as the non-billet versions.
Like Shaun, I'll know soon - once Iain has contacted me with a date for the repair and rework (hint hint
)
22 January 2011, 02:35 PM
#769
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I’ll try and give a bit of information on these billet upgrades and why it takes time to test and get the right combination of parts.
All things being equal a billet version of a compressor wheel will flow the same amount of air but will weight approximately 30-40% lighter than the cast counterpart. The power gains most companies claim for a billet wheel is because the amount of blade area available is increased improving peak flow.
The reduction in weight gives a significant improvement to transient response but the increased blade length can counteract this in overall spool up/lag.
So for example, when installing a larger LM450 Billet wheel onto our LM400 you obviously get more power potential and the throttle response felt every bit as sharp as the original small cast LM400 wheel. However when you actually ask the turbo to produce full boost it is almost as laggy as the normal LM450. It would appear the blade size and aerodynamic drag is the main factor when the turbo is asked to spin at 120,000+rpm.
Another advantage of the billet design is that the improved CNC accuracy can make lots of subtle changes that the cast wheels don’t/can’t have. You can incorporate improvements like extended tips, revised aerodynamics and cutting the blades closer to the central shaft.
So the trick is to find the right balance between these various changes to achieve what you are looking for.
In simple terms we are looking at some changes and features that will allow the Billet version to flow slightly more but then actually reduce the overall size so that the drag is improved and the transient response is even better That’s the theory anyway....
Regards
Iain
All things being equal a billet version of a compressor wheel will flow the same amount of air but will weight approximately 30-40% lighter than the cast counterpart. The power gains most companies claim for a billet wheel is because the amount of blade area available is increased improving peak flow.
The reduction in weight gives a significant improvement to transient response
but the increased blade length can counteract this in overall spool up/lag.So for example, when installing a larger LM450 Billet wheel onto our LM400 you obviously get more power potential and the throttle response felt every bit as sharp as the original small cast LM400 wheel. However when you actually ask the turbo to produce full boost it is almost as laggy as the normal LM450. It would appear the blade size and aerodynamic drag is the main factor when the turbo is asked to spin at 120,000+rpm.
Another advantage of the billet design is that the improved CNC accuracy can make lots of subtle changes that the cast wheels don’t/can’t have. You can incorporate improvements like extended tips, revised aerodynamics and cutting the blades closer to the central shaft.
So the trick is to find the right balance between these various changes to achieve what you are looking for.
In simple terms we are looking at some changes and features that will allow the Billet version to flow slightly more but then actually reduce the overall size so that the drag is improved and the transient response is even better
That’s the theory anyway.... Regards
Iain
22 January 2011, 03:52 PM
#771
Scooby Regular
Don't hang out for me mate, as I don't know when I can get it sorted. Based on the current LM400, I would suspect the billet version will be even better!
Of course I will publish my results as I did with the original LM, as and when it gets done.
Of course I will publish my results as I did with the original LM, as and when it gets done.
22 January 2011, 05:10 PM
#772
29 January 2011, 12:13 PM
#776
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New LM400-S60 Not Spooling as Expected
To anyone who has played with the Twin Entry Litchfield Turbos,
I have a Australian delivered 05WRX (2L) and i have just completed a twinscroll conversion which included a LM400-S60 Turbo from Litchfield in the UK. All the supporting mods have been done including a Grimmspeed 3 port boost soleniod. The turbo was purchased back in June 2010 and as i understand was one of the first batches.
My concern is we tuned the car last weekend and after being pretty happy that the car made 201kW ATW (6600rpm) at 16PSI i was super dissappointed at the spool rate. I was led to believe this turbo would spool as good if not better than a VF36. It will only make 4PSI at 3000rpm. I have since routed the boost line from the compressor to the wastegate to confirm that its not the boost solenoid (so it only sees gate pressure and should yield the fastest spool), still the same. It would appear to me that the wastegate is jammed. We also seemed to expereince changes in the boost response when tuning which were unusal and seemed to be heat related. ie 2nd and 3rd runs on same map. I thought i read of a similar problem with a memebr in NZ SPECNZ where he had problems with the exhaust housing and wastegate on his LM450.
Can anyone shed some light???
Cheers Ken Down Under In Sunny Brisbane
I have a Australian delivered 05WRX (2L) and i have just completed a twinscroll conversion which included a LM400-S60 Turbo from Litchfield in the UK. All the supporting mods have been done including a Grimmspeed 3 port boost soleniod. The turbo was purchased back in June 2010 and as i understand was one of the first batches.
My concern is we tuned the car last weekend and after being pretty happy that the car made 201kW ATW (6600rpm) at 16PSI i was super dissappointed at the spool rate. I was led to believe this turbo would spool as good if not better than a VF36. It will only make 4PSI at 3000rpm. I have since routed the boost line from the compressor to the wastegate to confirm that its not the boost solenoid (so it only sees gate pressure and should yield the fastest spool), still the same. It would appear to me that the wastegate is jammed. We also seemed to expereince changes in the boost response when tuning which were unusal and seemed to be heat related. ie 2nd and 3rd runs on same map. I thought i read of a similar problem with a memebr in NZ SPECNZ where he had problems with the exhaust housing and wastegate on his LM450.
Can anyone shed some light???
Cheers Ken Down Under In Sunny Brisbane
29 January 2011, 04:30 PM
#777
Scooby Regular
You really need to discuss this with Litchfield Imports. Iain who run's the company is very approachable and will certainly provide help / support for his products.
