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Old 02-27-2013, 11:16 AM   #51
sponaugle
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Quote:
Originally Posted by lancelucas View Post
Inducer size says otherwise, at least on paper

GT3076R - 57.0mm. EFR7670 - 57.2mm. GTX30R - 58.0mm.

GT3582R - 61.4mm. GTX3582R - 62.5mm.

Granted there's more than meets the eye than inducer size, but it sure has been a decent and consistent standard for a long time. Enlighten me sir!
Quote:
Originally Posted by reid-o View Post
I think he was referring to flow rate.
Quote:
Originally Posted by lancelucas View Post
Fair.

Correct. It is really not a good comparison to look at impeller dimensions across different turbos, for the same reason you might not use just displacement to compare engines. In reality, they ideal turbo would have the flow you want with the smallest impeller size.

If you are going to compare, you would want to compare flow rate based on the compressor maps. Jeff Perrin did a great job of this in his EFR thread. The 7670 has the high end flow that is similar to the old 35r, around 64-65lbs/min. Of course one can also just look at he results. I certainly was not able to get 475whp on pump fuel with my .30r. That is imperical so it doesn't make a global representation, but it is a data point. Then again the 30r .63 spools faster. It is not all cake and ice cream.
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Old 02-27-2013, 11:23 AM   #52
sponaugle
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Quote:
Originally Posted by NSFW View Post
I would love to hear what you learn from the pressure sensors. I've been drooling over those for years. There was a brief period where $1000/plug seemed tolerable... And then I started looking into the data acquisition....

If your car stumbles at all during cruise, I'd love to know what the pressure sensors show when that happens. It's a problem (or family of problems with similar symptoms) that plagues a lot of Subarus.

But mostly I wonder what's going on at high power. With different AFRs and timing and boost. Fascinating stuff.

Same here. The data rated are pretty high, and you need accurate linking to the original crank angle to make it useful.

It does seem that the data from some of the cruise issues would be very helpful. There are some stumbles that are hard to correlate to the usual metrics like afr, egt, ait, etc. In combination with a set of accurate intake and exhaust pressure sensors, there is a lot to learn. As soon as I finish the e85 tune, I'll install the system and start collecting data. I do need to fab up a way to get the coil pack attached with the fiber optic cable coming thru, as it is pretty tight in the Subaru engine bay relative to the spark plug access.

Jeff
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Old 02-27-2013, 11:24 AM   #53
sponaugle
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Quote:
Originally Posted by Bariga View Post
nice,
We also had AVCS working all the way to redline to keep the turbo happy.
I notice it spools very late and boost falls off might want to check out my thread
When you have a chance, post up your intake and exhaust AVCS maps. I'd like to compare them.

Jeff
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Old 02-27-2013, 11:32 AM   #54
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Quote:
Originally Posted by sponaugle View Post

When you have a chance, post up your intake and exhaust AVCS maps. I'd like to compare them.

Jeff
It's just intake avcs running on a vipec.
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Old 02-27-2013, 01:09 PM   #55
sponaugle
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Quote:
Originally Posted by Maxwell Power View Post
It's just intake avcs running on a vipec.
Ah cool.. I have been meaning to switch my EZ30R Bugeye over to Vipec from the Hydra..

Jeff
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Old 02-27-2013, 03:21 PM   #56
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^ best idea ever
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Old 02-27-2013, 05:11 PM   #57
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Quote:
Originally Posted by sponaugle View Post
EFR7670, Perrin/Cobb, 475whp, Pump Fuel, Sponaugle Style Details.

At the same time the latest SD software from Cobb was getting good traction and the two together seemed like a good starting point. Tim at Surgeline/Cobb has been the master calibrator at Cobb and has refined the Speed Density tuning to a true science. If you are looking for a place to get science not fiction, take it to Cobb.
Thanks for the props Jeff but i want to make sure everyone understands the team effort that goes into the software development at COBB. We happen to be the guys in the car entering the values for your tune but my efforts and expertise pale in comparison to the sum of talent and effort behind the COBB Subaru Expert Team. To name a few: Bill Gregg wrote the SD code, confirmed its function, and continually refine it with feedback from Lance Lucas here at COBB Surgeline. In fact, Lance is the guy who first introduced me to the COBB SD tuning product and he is THE go-to guy when i can't figure out the more subtle and critical aspects of tuning.. like how to get a big injector large cam stock ECU car to idle perfectly. SO, i humbly must take a step behind the COBB subaru experts and allow them to take a well deserved bow. Without these guys doing the HARD development and testing work, the cool big power tunes like yours and race car tunes (LIC 04 sti holds the modified track record at infineon) would be impossible.

Tim Bailey
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Old 02-28-2013, 03:06 AM   #58
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Thanks Tim! One of the things that will always keep me coming into work in the morning at COBB is the chance to work with a skilled team who can appreciate and then build upon my particular contribution to the projects. Within Surgeline, we've got a great tree of resources that make finished projects sum to much greater than their individual parts. Brandon and Geoff do an incredible job of organizing the jobs and designing a project based on the customer's goals, Chris and Stefan do above and beyond mechanical work with pristine quality, and Tim and myself bring it together with our own specialities that compliment each other really well. I love the details of calibration and Tim has an amazing knack for on-power tuning. Combine all of that and we end up with some really really neat finished products.

Then throw Spoon in the mix with his vast knowledge, amenable funding and an unbridled eagerness to explore and bam, one heck of a car comes out of blender
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Old 03-03-2013, 11:46 PM   #59
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E85 yet??
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Old 03-15-2013, 01:58 PM   #60
sponaugle
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Quote:
Originally Posted by tazswing View Post
E85 yet??
I put in E85 a few days ago and changed the injector scaling about 35% and and doing some road testing. It runs pretty good, so I'll try to get back on the dyno next week sometime.

I did do a quick 50-100 test, and posted this data in the 50-100 thread.



Also, here is a look at boost for the faster run:



I really should turn on flat foot shifting.. that boost drop sucks. You can see the spool up in 4th gear. Based on the datalogs I get back to full boost in round .6 seconds, which is not bad. Perhaps the most noticeable difference between this turbo and my previous GT30R .63 is the spool when adding throttle above the boost threshold.

Once you are at the boost threshold, it feels very snappy. I like it better then my 30R, and it makes more power to boot. Of course it costs about twice as much.

Jeff

Last edited by sponaugle; 03-15-2013 at 03:14 PM.
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Old 03-15-2013, 02:00 PM   #61
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So how much you think you are making now on e85? how much timing at redline? nice
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Old 03-15-2013, 02:45 PM   #62
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Jeff, can you post boost and TPS overlayed on the so we can see boost recovery.

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Old 03-15-2013, 03:11 PM   #63
sponaugle
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Originally Posted by kellygnsd View Post
Jeff, can you post boost and TPS overlayed on the so we can see boost recovery.
The picture above has boost, but here is boost and TPS.



This data is not very good, as this datalog had 10 parameters.. next time I'll do less parameters which will get more samples/sec. I also have a 20HZ GPS that I can datalog to get more accurate speed info.
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Old 03-15-2013, 03:13 PM   #64
sponaugle
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Quote:
Originally Posted by juanmedina View Post
So how much you think you are making now on e85? how much timing at redline? nice
The timing curve is exactly the same as the pump fuel, so look at the graphs in the first few posts. Obviously I can add more timing with E85, and will do so on the dyno... I just changed the fuel injector size and put in E85 to get some miles on the car.

It is hard to determine if there is more power from just switching to E85 with no changes in boost and timing. It feels faster, but that is so subjective. The dyno will tell.
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Old 06-26-2013, 02:35 PM   #65
wgr73
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sponaugle, did you ever finish the fuel tool that you posted a screenshot of? That would be awesome if you could post it!
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Old 07-06-2013, 03:42 AM   #66
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^^ +1, id love to play with that tool
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Old 07-15-2013, 01:15 AM   #67
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Been looking at this turbo and seems very nice Where would be the cheapest price to source one from?
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Old 07-20-2013, 03:44 PM   #68
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Originally Posted by STi MAN86 View Post
Been looking at this turbo and seems very nice Where would be the cheapest price to source one from?
Everybody seems to have them at the same price. Good luck finding them though. I'm currently on the waiting list from full-race and the best guess for availability is late August, and that is just a guess.

-Luke
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Old 06-11-2014, 03:10 PM   #69
wgr73
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Quote:
Originally Posted by sponaugle View Post
The timing curve is exactly the same as the pump fuel, so look at the graphs in the first few posts. Obviously I can add more timing with E85, and will do so on the dyno... I just changed the fuel injector size and put in E85 to get some miles on the car.

It is hard to determine if there is more power from just switching to E85 with no changes in boost and timing. It feels faster, but that is so subjective. The dyno will tell.

Hate to bump this thread, but did you ever dyno your car Jeff?
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Old 06-12-2014, 12:00 AM   #70
pet3r
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I want to see too!
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Old 06-17-2014, 06:58 PM   #71
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Bump!

Found this this thread and got really exciting reading through it waiting to get to the part about E85 results and then nada.

I was surprised by two things:

1. The amount of timing this setup would take on 92

2. The lack of exahust AVCS retard in the spool-up area.

I hope Jeff will pop back in and share details. I am curious how much more timing this setup took on E85.
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