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Old 10-23-2008, 04:07 AM   #1
Benchmark Tuning
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Default 555 Motorsports & DS1 Motorsports Present -06 STi TWINSCROLL POWER!!!

I am very happy to make this post after quite sometime we finally got Lou's twin-scroll monster on the dyno. It's an 06 STi with basic bolt-ons including a JDM-Twinscroll turbo (VF37) and the Tomei twin-scroll header.

Modlist

-Spearco TMIC
-Nismo 785cc Injectors
-SPT Short Ram intake
-JIC Titanium CBE, with custom JDM flanged Downpipe
-VF37 Twinscroll Turbo
-Tomei Header

This car made amazing tq for a VF-series turbo on a MUSTANG Dyno

It made 353 WTQ and 287 WHP. I will have a before vs after for with and without the TOMEI header.

353 WTQ on a mustang dyno is crazy, this is a dyno that reads roughly 360 WHP on a GT35r on pump gas.



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Old 10-23-2008, 09:35 AM   #2
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what's spool on the street? As the dyno sheet doesn't make it look very impressive.
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Old 10-23-2008, 10:24 AM   #3
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overlay it with a vf3X dyno sheet
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Old 10-23-2008, 11:26 AM   #4
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here is a stage 2 05 sti for comparison, the biggest thing is how much more tq

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Old 10-23-2008, 12:35 PM   #5
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that thing needs some meth Matt!
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Old 10-23-2008, 12:49 PM   #6
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Quote:
Originally Posted by wrxhard View Post
what's spool on the street? As the dyno sheet doesn't make it look very impressive.
On this dyno, a 2.5L WRX will put down 165whp stock. It defines the term 'heartbreaker'. Definitely a very humbling, but very accurate dyno. I've seen that 35R graph, a healthy GT30 Evo's, an SR56, a few STi's....definitely a very low reading dyno. We figured it out, roughly 14% percent lower than a Dynojet.

Quote:
Originally Posted by 555 Motorsports View Post
here is a stage 2 05 sti for comparison, the biggest thing is how much more tq

263/296 vs. 287/353?! It is pretty crazy. I'm trying to talk Lew into going to a Dynojet with me, because if my reasoning doesn't fail me, that's around 400ish ft/lbs of torque, by the more conventional Dynojet measure.

The car is wicked...it's seriously like a V8, in the amount of torque and lightning fast power delivery. First time I rode in it, I think my neck hurt for a few days afterwards. I'm jealous.
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Old 10-23-2008, 12:52 PM   #7
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Quote:
Originally Posted by MattPersman View Post
that thing needs some meth Matt!
umm... no Subaru needs meth

Nice numbers Lew

-Dylan @ DS1
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Old 10-23-2008, 12:54 PM   #8
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Lou's car is amazing. Not only does it make nice power, but it's honestly instant power.
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Old 10-23-2008, 02:56 PM   #9
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You've mis-understood me. I'm not knocking his numbers. Just wondering what it spools like on the street. The extra graph only shows me just how close it is to a vf39 as far as when they reach 300wtq. I guess i was just expecting it to be more than 100rpm difference.
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Old 10-23-2008, 02:58 PM   #10
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From what I've seen, it spools around 2700 on the street.

It's hard to judge spool by a dyno graph, and even harder to compare from Mustang dynos across to Dynojets. The Mustang shows peak torque later than full boost most of the time, so I'd imagine it's not the best depiction. Now if we could get some logs up (ahem, Matt ), it'd be a bit easier.
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Old 10-23-2008, 05:19 PM   #11
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+1 on the logs, I'm curious.
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Old 10-23-2008, 05:20 PM   #12
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ill get some logs up here shortly
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Old 10-23-2008, 05:41 PM   #13
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Here is a log on the street from before the dyno day...i'll have to get some logs from the dyno day, the car definitely spools noticably quicker on the street

Code:
RPM	IGN 	IDC	MRP	MAF g/s	MPH
2539	12.5	17.46	4.55	76.47	47
2616	10.5	23.06	8.29	99.96	48
2698	8.5	31.99	12.89	129.36	48
2824	7.5	43.55	18.51	175.49	50
2982	7.5	46.74	21.99	187.68	52
3116	8	43.66	20.97	184.33	55
3233	8	40.68	19.05	174.11	55
3367	8.5	45.25	18.07	184.95	58
3471	9	50.36	18.77	208.45	61
3634	9	51.49	18.99	213.27	65
3728	9.5	53.76	19.32	218.79	67
3816	10	54.99	19.22	226.15	67
3960	10	56	18.52	224.41	71
4110	10.5	57.59	18.78	232.25	73
4206	10.5	59.69	18.82	239.7	76
4313	11	62.96	19.4	255.04	79
4458	11.5	63.33	19.2	251.54	79
4514	11.5	64.85	19.15	260.8	82
4670	12	65.75	19.01	265.39	85
4795	12	66.03	18.75	263.74	88
4888	12.5	67.85	18.65	271.25	88
4980	12	67.99	18.41	269.3	91
5056	12	67.36	18.27	278.58	93
5178	12	70.22	18.26	280.48	95
5234	12	71.52	17.96	285.54	98
5377	12.5	69.51	16.87	283.11	98
5424	12.5	71.04	16.84	283.11	100
5488	12.5	69.54	16.17	273.44	103
5582	12.5	71.91	16.55	289.63	105
5654	12.5	71.6	16.21	288.71	107
5746	13	69.71	16.26	285.58	107
5806	13	70.66	15.99	286.01	109
5880	13	71.55	16.18	289.09	111
5946	13.5	69.72	15.46	282.59	113
6016	14	72.38	15.47	286.05	113
6128	14	71.83	15.24	281.04	114
6163	15	72.8	15.07	281.96	116
6265	15	71.62	15.08	287.08	117
6274	16	70.87	15.08	288.61	119
6381	16	70.79	15.03	288.16	119
6408	16.5	70.97	15.29	288.58	121
6498	16.5	72.12	15.06	290.15	123
6547	17	72.68	14.94	290.66	124
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Old 10-23-2008, 07:23 PM   #14
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Quote:
Originally Posted by 555 Motorsports View Post
Here is a log on the street from before the dyno day...i'll have to get some logs from the dyno day, the car definitely spools noticably quicker on the street

Code:
RPM	IGN 	IDC	MRP	MAF g/s	MPH
2539	12.5	17.46	4.55	76.47	47
2616	10.5	23.06	8.29	99.96	48
2698	8.5	31.99	12.89	129.36	48
2824	7.5	43.55	18.51	175.49	50
2982	7.5	46.74	21.99	187.68	52
3116	8	43.66	20.97	184.33	55
3233	8	40.68	19.05	174.11	55
3367	8.5	45.25	18.07	184.95	58
3471	9	50.36	18.77	208.45	61
3634	9	51.49	18.99	213.27	65
3728	9.5	53.76	19.32	218.79	67
3816	10	54.99	19.22	226.15	67
3960	10	56	18.52	224.41	71
4110	10.5	57.59	18.78	232.25	73
4206	10.5	59.69	18.82	239.7	76
4313	11	62.96	19.4	255.04	79
4458	11.5	63.33	19.2	251.54	79
4514	11.5	64.85	19.15	260.8	82
4670	12	65.75	19.01	265.39	85
4795	12	66.03	18.75	263.74	88
4888	12.5	67.85	18.65	271.25	88
4980	12	67.99	18.41	269.3	91
5056	12	67.36	18.27	278.58	93
5178	12	70.22	18.26	280.48	95
5234	12	71.52	17.96	285.54	98
5377	12.5	69.51	16.87	283.11	98
5424	12.5	71.04	16.84	283.11	100
5488	12.5	69.54	16.17	273.44	103
5582	12.5	71.91	16.55	289.63	105
5654	12.5	71.6	16.21	288.71	107
5746	13	69.71	16.26	285.58	107
5806	13	70.66	15.99	286.01	109
5880	13	71.55	16.18	289.09	111
5946	13.5	69.72	15.46	282.59	113
6016	14	72.38	15.47	286.05	113
6128	14	71.83	15.24	281.04	114
6163	15	72.8	15.07	281.96	116
6265	15	71.62	15.08	287.08	117
6274	16	70.87	15.08	288.61	119
6381	16	70.79	15.03	288.16	119
6408	16.5	70.97	15.29	288.58	121
6498	16.5	72.12	15.06	290.15	123
6547	17	72.68	14.94	290.66	124

Thanks. That's exactly what i was looking for!
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Old 10-23-2008, 09:26 PM   #15
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JIC Titanium CBE, with custom JDM flanged Downpipe

What do you mean by this? You had to re-flange the dp to make it fit?
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Old 10-23-2008, 09:28 PM   #16
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Quote:
Originally Posted by D Money View Post
JIC Titanium CBE, with custom JDM flanged Downpipe

What do you mean by this? You had to re-flange the dp to make it fit?
the downpipe to turbo flange had to be converted over to a JDM DP flange. The twin-scroll turbos use a different flange for the downpipe.
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Old 10-23-2008, 09:28 PM   #17
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edit^beat me to it
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Old 10-23-2008, 09:31 PM   #18
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Do you think it's the twin scroll thats giving it so much more tq or the turbo design itself?

Also what if you added more fuel and boost? from the log look's fairly safe.
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Old 10-23-2008, 10:48 PM   #19
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Wish you guys had a video...Lew's car sounds like an animal! It's like Jekyll and Hyde...quiet and stealthy at idle and it wakes up big time once he's in it. Sick car all around.
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Old 10-23-2008, 10:55 PM   #20
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Adam, you guys should get a video of it one night, either at that shop or one of the meets


..p.s.- i think i might have a video of the car on the dyno
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Old 10-24-2008, 12:12 AM   #21
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Quote:
Originally Posted by 555 Motorsports View Post
the downpipe to turbo flange had to be converted over to a JDM DP flange. The twin-scroll turbos use a different flange for the downpipe.
oh ok! Sorry I thought you meant the downpipe to midpipe. I got scared because I thought jdm dp meant you had to modify the length to reach or something. Only reason I asked is that I am picking up a jic full ti and hoped it worked with my UR downpipe.
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Old 10-24-2008, 12:05 PM   #22
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Nice setup.

Subscribed for post-dyno street logs!

I'd have to do something about that top end

Not a fan of torque spikes, but to each his own.
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Old 10-24-2008, 12:37 PM   #23
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^^ I have a vf37 set up on ebay right now

Last edited by DS1; 10-24-2008 at 07:18 PM.
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Old 10-24-2008, 12:53 PM   #24
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Sweet. I have a fiance' who is in school full-time and a mortgage
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Old 10-24-2008, 12:59 PM   #25
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Yeah, that top end is so horrible for an IWG VF setup.
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