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Old 10-13-2012, 03:35 PM   #851
jimbo228
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Default 2.5L w/ 2.5XTR TS

Hello everyone I finally have some data for you from my build.

The specs:
2010 STI
Cosworth 2.5L 8.2:1 SB
+ 1mm Valves
Tomei DAVCS 252 Cams
Blouch 2.5 XTR TS
ID 1000
KS Tech Intake
E85
15% Correction factor for 5000'


Best of the Day! 21PSI



Where she is happiest... Backed off 2 Degs... held 20PSI till redline.. Full Load to take me into the mountains


Best we did last time... Changed out the intake... She was choking...



Not sure why this is a video, but this is our 91 Tune.... great road trip map... also to the mountains
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Last edited by jimbo228; 10-16-2012 at 10:41 AM.
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Old 10-25-2012, 11:38 AM   #852
jimbo228
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This is probably how a hot JDM 2.0L would perform at sealevel.... And you would be super stoked... Great drivability... Boost responds linearly and effortlessly.
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Old 10-25-2012, 11:41 AM   #853
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And if I was at sealevel I'd probably peak 500-1000rpm sooner and be able to run the higher boost map till redline...
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Old 10-25-2012, 02:20 PM   #854
WhiteBgeye02
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im not sure if its something you messed w/ but if you turn the exh side avcs values to zero how does it affect the power? most of us going for stock location TS turbo's have the intake avcs but not the exhaust.
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Old 11-21-2012, 01:36 AM   #855
Mortal2None
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Quote:
Originally Posted by Shaun@ScoobyNet View Post
I suspect it maybe single to twin or twin to single.
It lets you use a TS manifold with a single scroll turbo so yes; 1.5 uppipe is for a twin scroll manifold to single scroll turbo.
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Old 11-21-2012, 07:43 PM   #856
johnfelstead
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Quote:
Originally Posted by kayen View Post
That is some damn good Spool, overall looks pretty fantastic. Especially once you get your Top End back.
OK, did some more work on the mapping yesterday and also found why we lost power with increased boost.

The OEM dump valve wasn't sealing fully it appears, which would have been feeding hot air back into the turbo inlet. So we fitted a Forge recirculating dump valve and did another mapping session on the road.

It instantly picked up 0.25BAR and sharpened up the response even more, so after mapping the car and spending a bit of time fine tuning the cruise AFR's etc. now the pressure of time had gone for the sprints i was doing we have achieved the following.

Power of 473 BHP, Torque of 540 FtLb !

Power and Torque



Power and Boost


The engine knocked a bit of timing out at the top end on the rollers, it doesn't on the road. This is a road mapped car, there is no attempt to optimise the engine for the rollers. It looks like on the road it's producing 490 BHP

That'll do!

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Old 11-21-2012, 08:04 PM   #857
kpluiten
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I'd love to see that turbo on some other cars... like mine! No, seriously.
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Old 11-22-2012, 08:19 AM   #858
kayen
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Quote:
Originally Posted by johnfelstead

OK, did some more work on the mapping yesterday and also found why we lost power with increased boost.

The OEM dump valve wasn't sealing fully it appears, which would have been feeding hot air back into the turbo inlet. So we fitted a Forge recirculating dump valve and did another mapping session on the road.

It instantly picked up 0.25BAR and sharpened up the response even more, so after mapping the car and spending a bit of time fine tuning the cruise AFR's etc. now the pressure of time had gone for the sprints i was doing we have achieved the following.

Power of 473 BHP, Torque of 540 FtLb !

Power and Torque

Power and Boost

The engine knocked a bit of timing out at the top end on the rollers, it doesn't on the road. This is a road mapped car, there is no attempt to optimise the engine for the rollers. It looks like on the road it's producing 490 BHP

That'll do!

WOW! This is quite the setup you have and glad you figured out the Topend issue.

Do you happen to have any Dyno plots on Pauls MY03 Spec C, with this turbo for comparison to yours?
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Old 11-22-2012, 03:48 PM   #859
johnfelstead
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Paul didnt do any dyno runs unfortunatley, as it went on for the last sprint round at the last minute. It was mapped at 1.5BAR and was good enough to win the S2 class and win the championship though.

Hopefully i'll be able to give more info when a few stock engined cars get the turbo fitted, there is one going on a JDM 2.0 Hatch at the moment.

I did a road dyno run, it looks like its producing over 500BHP on the road.
The car is a full weight MY05 JDM STi, with me in the car plus some fuel i was carrying the weight came in at 1590Kg

4th gear

Maximum Wheel Power: 418.5 BHP @ 7344 RPM
Maximum Wheel Torque: 438.7 LbFt @ 4271 RPM
Power to weight ratio: 263.2 BHP per ton

Terminal velocity due to power: 204.7 mph

In Gear Acceleration:
40 - 60mph = 1.9 seconds
50 - 70mph = 1.6 seconds
60 - 80mph = 1.7 seconds
70 - 90mph = 2.0 seconds
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Old 11-25-2012, 06:55 PM   #860
johnfelstead
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After discusions elsewhere i realised i had done my last Road Dyno run with the car full of weight from my mapping session, i was carrying extra jerry cans and the car was running a full tank of fuel, so I did a couple more runs tonight.

Two runs, both directions, 4th gear.

Maximum Wheel Power: 404.9 BHP @ 4945 RPM
Maximum Wheel Torque: 463.3 LbFt @ 4213 RPM
Power to weight ratio: 262.9 BHP per ton
Terminal velocity due to power: 202.5 mph

In Gear Acceleration:
40 - 60mph = 1.7 seconds
50 - 70mph = 1.5 seconds
60 - 80mph = 1.6 seconds
70 - 90mph = 1.9 seconds

Maximum Wheel Power: 414.4 BHP @ 6170 RPM
Maximum Wheel Torque: 456.4 LbFt @ 4455 RPM
Power to weight ratio: 269.1 BHP per ton

Terminal velocity due to power: 204.1 mph
In Gear Acceleration:
40 - 60mph = 1.8 seconds
50 - 70mph = 1.5 seconds
60 - 80mph = 1.6 seconds
70 - 90mph = 1.8 seconds

Last edited by johnfelstead; 11-25-2012 at 07:42 PM.
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Old 12-01-2012, 05:32 AM   #861
WhatTurboLag?
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So it seems these blotch ts turbos are starting to actually "work" am I wrong? I remember I mentioned before all the aftermarket ts turbos were a huge disappointment compared to a stock one/other aftermarket single scroll turbos
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Old 12-01-2012, 12:06 PM   #862
johnfelstead
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Mine is an Owen Developments TS Turbo.
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Old 12-01-2012, 12:54 PM   #863
Paul
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john can you do a 50-100?
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Old 12-01-2012, 01:54 PM   #864
johnfelstead
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Road dyno generates the figures automatically.

When i was carrying all the weight it showed up as 80-100 2.3s

Based on my later runs with the weight out of the car giving 1.8s and 1.9s for 70-90 i would expect you are looking at an 80-100 of 2.1s

So 50-100 would be done in around 4.4s in 4th gear.
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Old 12-02-2012, 04:07 AM   #865
WhatTurboLag?
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Leaning toward a 1.5xtr ts with blouch's 10cm hot side and a 3 inch inlet. Doesn't appear to hurt spool at all compared to the standard p25 housing.

With twin 38mm ewg's
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Old 01-11-2013, 01:20 AM   #866
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Quote:
Originally Posted by johnfelstead View Post
Mine is an Owen Developments TS Turbo.
Are Owens still dealing with IHI? they no longer list them on their site. I messaged them about an inlet restrictor for my rally car and they never responded.

While I am at it, what compressor housings are compatible with the VF37? I am trying to find a compressor housing to have a 34mm restrictor installed on and just swap onto my existing turbo. And are any of thevf models a small upgrade while I am at it?
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Old 01-11-2013, 03:39 PM   #867
johnfelstead
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They list being able to supply stock IHI turbo's. When did you contact them?

Why not just modify your current housing?

Funny you should mention VF models available for upgrade, i just sold my VF37 to a rally guy who was trying to make the later spec VF49 stock twin scroll work with a restrictor on his rally car, they couldnt make it work.
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Old 01-15-2013, 04:23 PM   #868
AspenScoob255
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Quote:
Originally Posted by bmxpunk View Post

While I am at it, what compressor housings are compatible with the VF37? I am trying to find a compressor housing to have a 34mm restrictor installed on and just swap onto my existing turbo. And are any of thevf models a small upgrade while I am at it?
Vf 39 is the same size i believe. Mine currently has a 39 compressor housing on it (purchased it that way).
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Old 01-15-2013, 04:48 PM   #869
soobaviator
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Quote:
Originally Posted by bmxpunk View Post
Are Owens still dealing with IHI? they no longer list them on their site. I messaged them about an inlet restrictor for my rally car and they never responded.

While I am at it, what compressor housings are compatible with the VF37? I am trying to find a compressor housing to have a 34mm restrictor installed on and just swap onto my existing turbo. And are any of thevf models a small upgrade while I am at it?
All RHF55 and newer RHF5HB (VF34, VF36, VF49) compressor housings are the same as far as the inlet and fitment. You can do a restrictor setup on any of them. You can pick up a VF39 housing put the restrictor on and use it on your 37. Just make sure you remove all of the RTV each time you swap housings. A scraper, and small SS wire brush work well for that.
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Old 03-21-2013, 09:04 PM   #870
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interesting thread. subscribed!
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Old 03-24-2013, 05:47 PM   #871
N-Bomb
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Also subscribed!

So I'm currently running a VF-37 (I assume) in my JDM Ver 9 swap. The tune could be better, as I'm peaking close to 230tq @ 4400 with 20ish PSI @ around 4100. I'm fairly stock except for a std Perrin inlet and H&S catback, running on 91 premium gas. Considering getting re-tuned for 93 this summer.

So I guess my question is: can I get more out of this turbo through tuning, or do I need to look at a different turbo? I'm more interested in quick spool and lower-end torque than high hp numbers, but I'd like to be able to pull in say, another 50 tq or so on top of what I have now.

From looking at the thread, I'm assuming that a Dom 1.5XT-R TS, SC42 Billet TS or a Litchfield LM400-S60 w/ a billet wheel would be closest to this of the 'premium' turbos? Would a VF-36 net me anything, except maybe quicker spool? Would it be worthwhile (for same cost or more) to go with a VF-42? Any news about this Owen Developments turbo?

Considering stroking the engine to 2.1 at some point in the future, but don't want to rely on that being a reality.

Thanks guys!
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Old 03-24-2013, 06:35 PM   #872
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well from my own experience , i had a ver 8 with VF36 , it spooled great and faster than the VF37. no mpre top end if not slightly less.

VF42 are great turbos but extremely hard to come by,i considered it my self but then i thought if i'm paying that kinda of money i might as well
go with high end after market turbo. litcfield would be the more advanced yet expensive choice, any way make a long story short , for th money i had i ended up buying the DOM 1.5XT-Rand can't be happier, it's still not tuned and i can tell for certain it gives same vf36 top in the low to mid range the spool time is the same as well. it's a far better turbo
and i recommend it
feel free to ask
best luck
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Old 03-24-2013, 08:46 PM   #873
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Does 230tq @ 20psi seem low? I was 220ft-lb at 4000rpm on 11psi and 5200ft elevation. My engine is a 2.2l with 8.7:1cr and the vf37.
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Old 03-25-2013, 04:11 PM   #874
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Quote:
Originally Posted by bmxpunk View Post
Does 230tq @ 20psi seem low? I was 220ft-lb at 4000rpm on 11psi and 5200ft elevation. My engine is a 2.2l with 8.7:1cr and the vf37.
My numbers are at the wheels, afaik. What kind of fuel are you running?
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Old 03-25-2013, 05:23 PM   #875
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Mine is at the wheels on 91octane
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