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Old 09-28-2012, 10:57 PM   #1
ASF Machine
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OMGHi2U JB 6266 + High Compression 2.33L EJ= Love on the Dyno + Lust at the Track

Location: Elevated Tuning @ ASF
Ambient Temp/Conditions: 82 deg F, 22% Humidity, Baro 25.3in-Hg
Elevation: 4800ft
Weather: Sunny
Tires: Toyo RA1s

Car: 2004 STi Panda Car
Tuner: Elevated Tuning Will
Dyno Info: Dyno Dynamics
Transmission: Stock 6 Speed
Gear: 4th
Peak HP at RPM: 603 at 7510rpm, 1.15 CF
Peak Torque at RPM: 434 at 7000rpm
Baseline hp/tq for a stock on same dyno: 2011 STIs make 209-216whp on this dyno with 1.15 CF
Target Boost: 28 psi
Target AFR: .78
Fuel: E85
Engine/Power Modifications:
ASF Custom Track Longblock
Bottom:
AEBS Sleeves, 99.5mm ASF E Spec 9.8:1 Pistons , Stock Revised Oiling EJ205 Crank (ASF Balanced) ASF +2mm H Beam Rods, ACL H Bearings, ARP Studs, OEM Subaru Gaskets.
Top:
ASF Track Series Ported AVCS Heads, +1mm Valves (Inconel Exhaust), ASF Multi Angle Into Radius Valve Job, ASF-Spec'd BC HD Spring Kit, BC280 Cams.
Induction:
JC Fabworks/PTE JB 6266 Turbo Kit, Perrin Core, FIC 2150 Injectors, Walbro 460lph, T&G TGV Delete, GT Spec UEL Header, Accessport on SD.


Last edited by ASF Machine; 10-01-2012 at 04:42 PM. Reason: Fixed some specs
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Old 10-01-2012, 12:43 AM   #2
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Lovely peak numbers, but a pretty small powerband it seems, not to mention a kind of early peak (figured a turbo this large would last later into the rev's). Would a 79mm crank have picked up some area under the curve?

Most destrokers ran a +4 rod length I thought on the 2.5 displacements or ran LOW compression on stock CR pistons. Is that why you guys ran the once upon a time 10:2 pistons and a shorter rod, or is something else at play?

Last edited by Zee Biker; 10-01-2012 at 01:24 PM.
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Old 10-01-2012, 12:38 PM   #3
ASF Machine
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Quote:
Originally Posted by Zee Biker View Post
Lovely peak numbers, but a pretty small powerband it seems, not to mention a kind of early peak (figured a turbo this large would last later into the rev's). Would a 79mm crank have picked up some area under the curve?

Most destrokers ran a +4 piston I thought on the 2.5 displacements or ran LOW compression on stock CR pistons. Is that why you guys ran the once upon a time 10:2 pistons and a shorter rod, or is something else at play?
IMO, the BC280s are jenky. Not really that large of a turbo at 62mm as an OG 35R is 61.4mm?
Another car we did on a BB 6266 feels completely different but then again, the other car is a 2.5L running Kelford Cs and dual AVCS. I believe the powerband on this car fits the shorter gears better than the torquier 2.5L with the taller gears.

This is still a +2mm rod with 9.8:1 CR and 1.209" compression height.

Last edited by ASF Machine; 10-01-2012 at 05:34 PM. Reason: Fixed CR info
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Old 10-01-2012, 01:30 PM   #4
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Quote:
Originally Posted by ASF Machine View Post
IMO, the BC280s are jenky. Not really that large of a turbo at 62mm as an OG 35R is 61.4mm?

Another car we did on a BB 6266 feels completely different but then again, the other car is a 2.5L running Kelford Cs and dual AVCS. I believe the powerband on this car fits the shorter gears better than the torquier 2.5L with the taller gears.
This is still a +2mm rod with 10.2:1 CR and 1.209" compression height.
The BC offerings have consistently proven to be large disappointments, for a VERY long while. I still don't understand why people go with them over GSC's or Kelfords in maxout builds when the price is within a few hundred dollars. I noticed the price bump in the last year, but still, it seems dollar value is worth it. In my E-racing opinion, of course.

Saw that 2.5 DAVCS car and loved it. I think it needs an update actually...

Is there any reason you choose to only +2 the destroker rod when it is safely possible to run a +4?
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Old 10-01-2012, 03:07 PM   #5
GeneralTJI
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Quote:
Originally Posted by Zee Biker View Post
The BC offerings have consistently proven to be large disappointments, for a VERY long while. I still don't understand why people go with them over GSC's or Kelfords in maxout builds when the price is within a few hundred dollars. I noticed the price bump in the last year, but still, it seems dollar value is worth it. In my E-racing opinion, of course.

Saw that 2.5 DAVCS car and loved it. I think it needs an update actually...

Is there any reason you choose to only +2 the destroker rod when it is safely possible to run a +4?

My BC's provided a huge top end power increase... power never really fell off up top (revved to 8300). That part impressed me... though I do agree that for a little extra you can get the really good stuff. When I bought my cams they were about 400 or so cheaper than anything good, now the gap has actually closed up if anything. I have thought about getting rid of them, but they really did work well for me... tough choice now

Last edited by GeneralTJI; 10-01-2012 at 03:19 PM.
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Old 10-01-2012, 03:21 PM   #6
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Quote:
Originally Posted by GeneralTJI View Post
My BC's provided a huge top end power increase... power never really fell off up top (revved to 8300). That part impressed me... though I do agree that for a little extra you can get the really good stuff. When I bought my cams they were about 400 or so cheaper than anything good, now the gap has actually closed up if anything. I have thought about getting rid of them, but they really did work well for me...
I have 0 doubt in saying that either of the other brands mentioned in similar grinds will prove to be a better cam up and down.

ASF, Kris actually (CLOSE!), are those pistons specific to the destroker you cooked up with the +2 rod?
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Old 10-01-2012, 01:44 AM   #7
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I'm doing a similar build, the lack of avcs i'm sure didn't help the spool. looks like a blast 5500 rpms+
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Old 10-01-2012, 05:52 AM   #8
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lets gather 20 people to gift this vehicle some kelford 220-b or gsc s2 davcs cams for educational purposes. This car seems like a perfect place to test) Im in for 50$

Is this the legendary panda car that spanked t78 supras and some sprayed n/a muscle back in the day?
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Old 10-02-2012, 02:09 PM   #9
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Quote:
Originally Posted by STi*guy.kiev View Post
lets gather 20 people to gift this vehicle some kelford 220-b or gsc s2 davcs cams for educational purposes. This car seems like a perfect place to test) Im in for 50$

Is this the legendary panda car that spanked t78 supras and some sprayed n/a muscle back in the day?
Panda StI vs Supra - YouTube
I don't this is the same car.
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Old 10-03-2012, 02:48 PM   #10
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Quote:
Originally Posted by Zee Biker View Post
Most destrokers ran a +4 rod length I thought on the 2.5 displacements or ran LOW compression on stock CR pistons. Is that why you guys ran the once upon a time 10:2 pistons and a shorter rod, or is something else at play?
I think you are getting a few different routes screwed up. There have been stock rod and EJ257 pistons run by some (super low compression and massive quench height ).
Then there has been the budget/live with some compromises to save $$ method, like done here or how MPS also offers (like their first one Dom shared).
Then their is the +4mm like I've been doing since 07 and MPS offers with their more premium destroked builds.


Quote:
Originally Posted by ASF Machine View Post
Car is fairly laggy.
We found some pre turbo exhaust leaks, a hole in the wastegate diaphragm and few other odds and ends. Wastegate was reused from his previous build, so it's getting replaced completely as well as some header leaks getting fixed.

Customer is ordering an Omni 4 bar map sensor, we'll get it back on the rolls and let it eat.
I was going to say that something seems off to be so laggy on that turbo. Also, are these the hush hush BC 28x cams that they'd been trying to get tested or the same old ones that they've had?

Quote:
Originally Posted by Crystal_Imprezav View Post
And they are a PITA to assemble
Truth

Quote:
Originally Posted by ASF Machine View Post
And messy.
yerp!


Good stuff. Interested to see what the 6266 does once all the little things are fixed. I've fallen in love with a GTX2582R
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Old 10-01-2012, 10:00 AM   #11
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Looks a bit late, but good power! Nice work
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Old 10-01-2012, 11:19 AM   #12
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Nice power, why did you guys stop at 8K?
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Old 10-01-2012, 12:31 PM   #13
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Car is fairly laggy.
We found some pre turbo exhaust leaks, a hole in the wastegate diaphragm and few other odds and ends. Wastegate was reused from his previous build, so it's getting replaced completely as well as some header leaks getting fixed.

Customer is ordering an Omni 4 bar map sensor, we'll get it back on the rolls and let it eat.
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Old 10-01-2012, 01:04 PM   #14
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few ?'s

-what +1mm valves,
-for these destroker setup's is there anything done to customize the pistons to accept a 75mm instead of sti's 79mm crank
-if the rods/pistons you have were available how much for them? +2/+4 for a 2.33/34 or 2.5, thanks, just trying to get an idea

-what do you plan on reving it to? 85-9k? is the rotating assembly all balanced together with the flywheel and all by any chance? I ask cause I seen a nuke or fuki 2.5 set-up going to like 9300.

Last edited by Irv Weissmanhowerton; 10-01-2012 at 01:10 PM.
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Old 10-01-2012, 01:34 PM   #15
ASF Machine
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Irv-
Supertech valves.
With a +2mm rod, you can use the normal shelf 1.209" compression height.
PM'd you.
We might end up at 8700-ish, the engine build was "budget build" using BC cams & springs, so based on the spring rate & valvetrain weights, that's a far as we'll tell him he can push.
Rotating assembly is balanced together but customer purchased flywheel and pressure plate post build.


Chris?-
Some people cannot get past the $200 dollar difference.
As for the +2 rod, it's not so much the longer rod we're after here as it is the convenience it affords us when lowering the stroke.

Last edited by ASF Machine; 10-01-2012 at 01:42 PM.
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Old 10-01-2012, 01:56 PM   #16
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And they are a PITA to assemble
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Old 10-01-2012, 02:05 PM   #17
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Quote:
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And they are a PITA to assemble
And messy.
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Old 10-01-2012, 05:17 PM   #18
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10.2:1 with 56cc chambers, 79mm stroke, .024" gasket & .007" deck clearance.
9.8:1 with all of the above except 75mm stroke.
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Old 10-01-2012, 06:06 PM   #19
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The benefit to running a high compression shelf piston (I used the CPs) is reduced price while reaping most of the benefits of the +4 motors in terms of rod ratio. The +2 rod also keeps the piston out of the hole so you can have a decent SCR/DCR and quench/squish.

Was this motor set up with OEM cam centerlines? A few people run them 1 tooth retarded on the intake and 1 tooth advanced on the exhaust to match up with the destroker's stroke profile. That translates to 14 crank degrees which is a bit much (best to use cam gears or re-advance with AVCS/DAVCS) and can have a big impact on the DCR of the motor. For example, for a constant DCR on a 8.0:1 SCR destroker, retarding the ICA by 10 crank degrees requires a 10.28:1 SCR piston.
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Old 10-01-2012, 07:44 PM   #20
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Short stroke, big bore: Love it.
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Old 10-03-2012, 03:13 PM   #21
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Micah,

I've only known about the standard 2.5 piston/rod with the 75mm crank with super low compression and massive quench and the +4 rod offerings.

Never knew people did +2's with the 75mm crank, just the 79 along with the custom pistons.
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Old 10-03-2012, 10:56 PM   #22
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Yeah, Dom's set up from MPS (the one that made a lot of interest) was a +2, as were a lot of those early 'public' MPS long rod setups. I know they've mixed it up now and offer 134 or 134.5mm length setups. Can't remember exacts as he and I have juggled too many ideas and set ups through the years to keep things straight

Now the Honey Badger that Turn In Concept carries is a +2mm on a 79mm stroke. It's done to reduce compression height and reciprocating mass...not done as a rod ratio change as it barely bumps it from a 1.65-1.67:1.


ok now /threadjack and clarifying. Joe, get that ish fixed and flying!!
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Old 10-09-2012, 10:18 AM   #23
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This was my 11.2 run against a 10.4 run by ASF's green crotch car. My best run that night was an 11.1 @125mph.
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Old 10-09-2012, 01:08 PM   #24
GeneralTJI
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Is that the car from this thread or your own?

Last edited by GeneralTJI; 10-09-2012 at 01:19 PM.
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Old 10-09-2012, 02:06 PM   #25
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Homemade sent you a pm but inbox is full.
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