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Old 12-28-2009, 12:04 PM   #1
Forged Performance
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Location: Marietta, GA
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2015 Subaru STi
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Default Forged Performance - 07 STI Stroker Build

Forged Performance makes 407whp/404wtq on 93 octane @ 19.4 psi, 461whp/461wtq on E85 @ 22.4 psi on a GT35r

Event: Dyno Dynamics Dyno Pull
Location: Forged Performance, Marietta, GA
Car: 2007 Subaru STI
Tuner: Scott Siegel @ Forged Performance
Dyno Info: Dyno Dynamics
Peak Power: 407whp/404wtq on 93 octane @ 19.4 psi, 461whp/461wtq on E85 @ 22.4 psi
Fuel: 93 Octane and E85

Alright ... Here's the run down on this beast:

- Forged Performance 2.7L Stroker Motor
  • Billet Crank
  • Forged Pistons
  • Forged Rods
  • Race Bearings
  • ARP Hardware
  • Balanced & Blueprinted
- Race Prepped Heads
- Deatschwerks Injectors
- Cosworth Intake Manifold
- Koyo Radiator
- Moroso Oil Pan
- Carbonetic Triple Carbon Clutch
- UR GT35r Turbo Kit
- AEM EMS

Here's what it made on our Dyno Dynamics "Heart Breaker" dyno:
407whp/404wtq on 93 octane @ 19.4 psi


461whp/461wtq on E85 @ 22.4 psi
*Unfortunately, we ran out of fuel pump on the E85 tune and couldn't push the full potential. Round 2 E85 tune coming soon










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Last edited by Forged Performance; 07-15-2010 at 03:56 PM.
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Old 12-28-2009, 01:27 PM   #2
godforbid67
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Graph? Slip? At leat a video?
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Old 12-28-2009, 01:37 PM   #3
siegelracing
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Here's pump gas compared against another built motor that was recently on our dyno:





More plots and video coming

Siegel
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Old 12-29-2009, 03:48 PM   #4
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Retarded monkey says power is kinda low for that much of a built engine.
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Old 12-29-2009, 03:52 PM   #5
acssa
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what oil pick up is that?
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Old 12-29-2009, 04:08 PM   #6
nrowensby
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Wow... That's kinda depressing...
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Old 12-29-2009, 04:14 PM   #7
siegelracing
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That's the Moroso oil pickup.

Obviously I don't want to get into a dyno debate, and we will be taking this car to at least one of the local Dynojets as well as the strip, but by our best calculations (taken from other STi's that have dynoed at multiple places) our Dyno Dynamics 409whp is Dynojet 471whp on 93 with just 20.4 psi peak and 19.4 psi at peak whp. This is exactly what a build of this level SHOULD make. With the heads, cams, intake, header etc, 470whp is exactly right.

We had 2 Walboros in series and on E85 the fuel pressure is dropping at 25.0 psi peak, 22.4 psi at peak whp and what calculates to 530 wft-lbs and 530 whp (Dynojet). We thought the Walboros in series would be enough, but the Bosch engineer believes that using the stock hardline from in-tank to in-line Walboro is our major restriction. He thinks that at full bore, the pressure from in-tank to in-line could be dropping to near 0, so it acts more like a single Walboro. Again, it's not surprising to max a Walboro (or even a "Walboro and a half") at 530-550whp on E85... (It was 461/461 on our Dyno Dynamics).

Cliff notes: (best calculation to Dynojet whp)
93 octane 20.4 psi peak, 19.4 psi at peak whp 471whp
E85 maxed the pumps (losing 20psi of fuel pressure) at 530whp

Car will be tested on a Dynojet and at the strip once it's full complete.

Siegel
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Old 12-29-2009, 04:18 PM   #8
nrowensby
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There is quite a difference in 409.3whp and 471whp...

I guess we will just have to wait to see what it does on a different dyno or on the strip... until then, 409.3whp seems quite depressing for the amount of work done...
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Old 12-29-2009, 04:23 PM   #9
Forged Performance
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Quote:
Originally Posted by nrowensby View Post
There is quite a difference in 409.3whp and 471whp...

I guess we will just have to wait to see what it does on a different dyno or on the strip... until then, 409.3whp seems quite depressing for the amount of work done...
The dyno is just a tool ... The track would be the correct proving ground.
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Old 12-29-2009, 04:24 PM   #10
nrowensby
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Interested to see if it runs with similarly dyno'd 400hp cars... or closer to 500hp cars...
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Old 12-29-2009, 04:28 PM   #11
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Details of short block build?
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Old 12-29-2009, 04:33 PM   #12
Forged Performance
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Quote:
Originally Posted by blkscooby View Post
Details of short block build?
- Billet Stroker Crank
- Forged Pistons
- Forged Rods
- Race Bearings
- ARP Hardware
- Suby AA360 Oil Pump

and all the machining, balancing and blueprinting that goes along with it
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Old 12-29-2009, 04:40 PM   #13
siegelracing
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Stock STi's generally make 200-210whp on this dyno and 24-250whp on most Dynojets. We've done 5 Stage2 STi's here in the last few weeks and they all made about 260whp here and 300whp on Dynojets.

It's really not hard... Different dynos read differently. If you search other kinds of cars you'll find that most people consider Dyno Dynamics to be 13-20% lower than Dynojets.

Siegel
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Old 12-29-2009, 04:45 PM   #14
siegelracing
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The owner of the car had the 35R on his stock block that made 380whp on 93 and 450whp on 110. He says that the car feels MUCH faster on the current 93 map (estimated 470 DJ whp) than it did on the old 110 map...

So while you might be disappointed at the number, the owner of the car is thrilled with the performance

Siegel
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Old 12-29-2009, 04:46 PM   #15
siegelracing
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I could walk back out the dyno, turn off the weather station, change the correction and make a plot that shows 470. Would that relieve your disappointment?

I could do that for you. You know, like a Christmas present

Siegel
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Old 12-29-2009, 04:50 PM   #16
nrowensby
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That certainly couldn't have all gone in one post... I believe you though...
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Old 12-29-2009, 04:55 PM   #17
siegelracing
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Sorry. I kept posting, and then reading it and thinking of something else. It's always a hard call as to risk a ninja edit or just add another post...

And I'm in a good mood getting ready to take 5 days off

LOLOL! Just for grins I Googled "dyno dynamics dynojet" and one of the first posts was from HERE:

http://forums.nasioc.com/forums/showthread.php?t=286440

Siegel
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Old 12-29-2009, 06:25 PM   #18
AVCSKIDD
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Not what I was expecting
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Old 12-29-2009, 06:26 PM   #19
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Quote:
Originally Posted by nrowensby View Post
Wow... That's kinda depressing...
Quote:
Originally Posted by nrowensby View Post
There is quite a difference in 409.3whp and 471whp...

I guess we will just have to wait to see what it does on a different dyno or on the strip... until then, 409.3whp seems quite depressing for the amount of work done...
You're not paying any attention to the 20 psi.....

If my car made 400whp at 20psi on pump gas i'd be all

it takes me 26psi and methanol just to get to 375 whp.
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Old 12-29-2009, 06:29 PM   #20
AVCSKIDD
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Quote:
Originally Posted by Phatron View Post
You're not paying any attention to the 20 psi.....

If my car made 400whp at 20psi on pump gas i'd be all

it takes me 26psi and methanol just to get to 375 whp.
I think what he was getting at is it doesn't look that much stronger than a typical 35r car with cams. its good power but its nothing crazy consider what all is done.
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Old 12-29-2009, 06:41 PM   #21
juanmedina
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Quote:
Originally Posted by Phatron View Post
You're not paying any attention to the 20 psi.....

If my car made 400whp at 20psi on pump gas i'd be all

it takes me 26psi and methanol just to get to 375 whp.
Quote:
Originally Posted by AVCSKIDD View Post
I think what he was getting at is it doesn't look that much stronger than a typical 35r car with cams. its good power but its nothing crazy consider what all is done.
I agree with AVCSKIDD a typical 35R with built heads should make that kind of power at 20-21 psi on 93oct.

Look at this thread http://forums.nasioc.com/forums/show...light=topspeed

What is the AR on the turbo? spool seems slow to me
400-410whp on a low reading dyno is a 11.4-11.7 car if is full weight

Last edited by juanmedina; 12-29-2009 at 06:52 PM.
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Old 12-29-2009, 06:44 PM   #22
CoolRex
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Where's the tq curve?
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Old 12-29-2009, 06:48 PM   #23
juanmedina
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Quote:
Originally Posted by CoolRex View Post
Where's the tq curve?
is the second one the one that is going down

Last edited by juanmedina; 12-29-2009 at 06:53 PM.
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Old 12-29-2009, 06:49 PM   #24
CoolRex
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Never mind....see now there is two charts.

Last edited by CoolRex; 12-30-2009 at 08:17 AM.
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Old 12-30-2009, 03:38 PM   #25
siegelracing
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Typical 35r setups make 410-420 whp on a dynojet. They usually make about 360 on our dd. This made 410 on ours which is about 470 on a dynojet. 470 on 93 is STRONG.

Siegel
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