Very nice Shaun

Do you take your in-gear timings by doing a run from low revs all the way up, and Deltadash then gives you the 20mph increments? Just thinking I could get similar data from the Syvecs logs

 

Basically yes.

I could work out any increment to be honest, but the 20mph steps I have given are the default within Road Dyno.

 

A quick look at the Syvecs logs - and based on just 2 pulls, but otherwise really rather unscientific I readily and happily admit, shows my LM480-equipped 2.5l (VPower+10% meth), in 4th, does:

40 - 60 = 2.6s
50 - 70 = 2.1s
60 - 80 = 1.9s
70 - 90 = 1.9s

I'll do some more scientific runs in the next few days as I have no idea whether the road was flat or anything like that.

 

Tim,
Also keep in mind, that was with my full fat JDM with ICE system and FULL fuel load as well!

These tests are a good leveller (assuming vehicle weights are similar) as it really shows how quick the car is. Dyno figures are one thing..... how it performs on the tarmac may be something else.

 

Mine's a "full fat JDM" as well, with ICE, and we were two-up and neither of us are lightweight lol.

Superficial observations would suggest that the bigger turbo is, not surprisingly, similar or even a bit slower that yours at the slower speeds but would be pulling away as the speeds increase due to the extra power.

Interesting stuff...better find myself a test route

 

Glad you got it sorted Tim those figure are very impressive. I am just waiting for my SC42 twinscroll to be fitted this weekend and will be having it mapped next week hopefully.

Immy

 

Just in case there are any eagle-eyed dyno-queens out there, you may note that the VPower AFR is not quite right on my graphs - the lambda sensor at Surrey Rolling Road had been fouled by a previous customer using funny fuel - the actual AFRs were 11.2/11.3 and verified against an innovate AFR meter and my own L2H2 sensor

The sensor was changed before we did the meth runs.

 

Tim,
What was changed / altered between you latest run and the previous runs where you were'nt happy? All seems pretty much on the money now.

 

An(other) exhaust leak fixed, and some mapping changes - that's it

 

Hi Tim,
My car had a power run at Surrey rolling road,
My T25 is running the 2.5 block, with Syveccs, FMIC, and all the items required for big power.
I am running the non billet LM500 turbo, with 20% meth.
I got a peek power of 513H.P. with 550ILBFT torque.

I am a bit disapointed with the power from my turbo compaired with yours , mine should make 500H.P with V Power alone,

I have a linnered block and Cosworth heads , so am looking for more and will chat with Iain to see what can be done?

I may go the twisted billet wheeled turbo route from Scooby clinic I feel that 600H.p can be achived without the hassle of the Meth?

 

Paul,

My LM480 is a bit of a hybrid really. It started life as one of the first - if not the first - LM480. It then went back to have the exhaust housing remachined and - I think - the LM500 exhaust turbine fitted (something like that anyway) and then more recently the LM480 billet compressor wheel. So it's a bit of a Heinz 57

My 2.0 Spec C heads really ought not to be as good as yours, although they have been cleaned up and (controversially it seems) rechambered to suit the 2.5. And it "just" has stock Spec C cams.

20% meth on an LM500 - hmmm - would have thought 530bhp-ish maybe? But your torque is VERY healthy.

What boost are you running?

 

I think that I am running 1.8 bar, and do agree with you that I should be on the better side of 530H.P with the Meth.

I shall see what Iain can do, My heads have been tweaked as well , even though they are Cosworth spec.

 

Paul,
You maybe talking circa 15bhp adrift with your PEAK figure (based on your expectations)..... I wouldn't worry about it. It means jack **** in reality (3.2%) and I would rather have the higher peak torque..... which you have.

What type of induction kit are you using?

What's your boost at peak power?

 

At timH.

Who done this round of mapping?

 

Somebody asked on my project thread about a comparison between the VF and LM450 Billet..... I suspect to see what you would lose "down low" with a much bigger turbo.

I thought this graph would be interesting, as it highlights the "in reality" minor differences down low. For a turbo that produces 450bhp, I think this is pretty remarkable against the mega responsive VF36/37 twinscroll turbo:

 

thats impressive

 

You could say that!

 

Similar condition with my LM450-60 with 10% of meth (5lt). At 1.5bar the car in 5/6 gear has about 400ps and spool very well, but like wrote i have to use meth. The boost pressure is costant from 3.600 to 7000rpm (1.52-> 1.45).

Still waiting for the dual solenoid for my blitz boost controller so i can to try to push 1.7/1.8 bar (peak).

 

Johnny,
The original LM450 Non Billet achieved around 460bhp @ 1.6bar (peak power) on VPower. This was achieved on Mel_Typer's car.

The Billet LM450 provides around 450bhp @ 1.6bar (peak power) on VPower. This was achieved on my car.

You seem to be way off that at the moment, especially with the addition of Meth. Another .15bar (@ peak power) won't give you over 50bhp more.

Something else must be holding you back.

 

Hi Shaun,

I know. The only parts missing in my configuration is a front intercooler and a fuel pressure regulator. Then my LM is a 55mm and not 76mm like the turbo you mentioned, But i dont think those parts i can gain 50 or more ps.

At the moment here in Italy the outside temperature is still very high. 33°. The intake temperature was 46°.

Two different tuner have checked the car here in Italy and all seems fine about map. We tried to raise the boost to 1.6. The power is always the same but more torque. The opinion of two tuners is that my turbo has reached his max output.

A final tuner will check again my car soon if his opinion will be the same about the others i will contact Iain for a his feedback.

 

I run the 58mm inlet and Mel runs the 76mm so it's not that!

Your problem I suggest is your TMIC and induction. Especially with those crazy inlet temps!! Your charge temps will be through the roof!

Your tuner should of spotted that one!

Get a FMIC and you will see the power rise.

 

Yes the high temp is an issue same thing said by the tuner here, of course, but with a FMIC they dont think the engine can reach 450ps. Next month with cold temperature probabily the engine will get 20/30ps.

About induction i fitted this one (gruppem). See it in my blog.

http://japan-hobby.blogspot.com/2011...or-subaru.html

 

Johnny,
Did you realise my LM450 produced 405bhp on the oe airbox and oe TMIC. Couldn't get anymore. Put the FMIC and induction kit and it shot straight up by 45bhp!

 

Also that filter, looking by the size and shape of the kit, looks really small to me.

 

Here is the size of Kn filter (width: 19,5cm height 12,3cm):

 

Scrap what I had typed before.... I obviously can't understand numbers!

That filter appears to be large enough (based on the surface area).

 

If it was for coffee it would be an Espressor

 

I have also an Apexi filter from my bnr34 (less wide but more long). I will try fit it.

Then if i want to fit a FMIC i have to remove the gruppem carbon induction (not enought space for fmic pipes).

 

Not being satisfied with this....



I will be shortly testing a new turbo specification from Litchfield Imports / Turbo Dynamics on my 2ltr engine. It will sit "somewhere" between a LM450 Billet and a LM500 Billet, specification wise.

I'll let you know how I get on.

LM turbo number four.... here we come.

 

It's not this, per chance?:-

LM480-L70

The future of Subaru ‘Twin-scroll’ Turbo engines is here!