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Old 09-14-2007, 05:41 PM   #1
AVOturboworld
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Default 500hp w/bolt in AVO550

Right before we went back to Tsukuba Circuit in Japan for another testing run of the AVO race STI, Ross did a dyno check of the car to dial in the power a bit better. This project has been interesting from the start, as all the parts are bolt-in, without any custom work done to the engine bay. Even the stock MAF is in place still! With a cosworth engine, AVO550 turbocharger and a full list of other AVO parts throughout, it's been making serious power from the start. And this run showed it. Boost was turned up to 22psi, which is a very safe figure for this turbocharger, and everything was dialed in for longevity at the circuit.



It only took a few runs to get where we wanted. Power and torque were coming in strong from 3000rpm up, and peaking at 4000rpm - rather good for a 55lb/min turbocharger! It made as much torque as a stock STI from 3000rpm, and went up like a rocket ship from there to 500ft/lbs of torque at 4000rpm! 427hp made it to the wheels, good for 500hp at the crank. This really showed at the circuit, as even with S tyres this time we had a hard time keeping traction out of the corners, even in third gear! At the end of the day we did a conservative 1.01.55 around Tsukuba, with a lot more to chop off during a proper time attack run!

Cheers,

Paul Hansen
www.avoturboworld.com
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Old 09-14-2007, 05:49 PM   #2
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This...
Quote:
Originally Posted by AVOturboworld View Post
all the parts are bolt-in, without any custom work done to the engine bay.
And this....
Quote:
Originally Posted by AVOturboworld View Post
With a cosworth engine
Make me go

Arent all parts bolt in? I mean unless you use glue or duct tape.


We have absolutely no custom work done to the motor, except the motor.
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Old 09-14-2007, 05:53 PM   #3
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Thats one hell of a bolt on
List: $5,399.99

Cosworth High Performance Short Block Crate Engine Subaru STI EJ25

Cosworth EJ25 (STI) short block has gone through countless hours of dyno evaluation to determine the best combination of parts to guarantee reliable performance and reliability. Each EJ25 short block starts with a brand new Subaru case. The case is inspected and then the bores are honed to perfection to receive Cosworth Forged Pistons. We then balance the rotating assembly that includes a new STI Forged crank and Cosworth Forged H-Beam Connecting Rods to within .5 gram. The select parts are professionally assembled by one of Cosworth?s skilled engine builders using our own coated , tri metal race spec bearings. Options include: Billet 79mm crankshaft, Billet timing belt guide. For added performance, please see our Cosworth CNC ported Big Valve Cylinder Heads and high performance camshafts.

Cosworth EJ25 short block includes the following:

New Subaru EJ25 STI Engine case
New Subaru EJ25 STI Forged Crankshaft
Cosworth Forged H-beam Connecting Rods
Cosworth Forged Pistons and rings
Cosworth Coated, Tri-metal bearings
Balanced to within .5 gram
Professionally assembly
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Old 09-14-2007, 06:07 PM   #4
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Default

Sorry, all the AVO parts are bolt-on, is what I meant. It's not a rotated setup with custom piping. But the engine certainly does help! 22psi isn't quite straining it, though....

Cheers,

Paul Hansen
www.avoturboworld.com
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Old 09-14-2007, 06:09 PM   #5
STimo
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Old 09-14-2007, 06:14 PM   #6
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Quote:
Originally Posted by AVOturboworld View Post
Sorry, all the AVO parts are bolt-on, is what I meant. It's not a rotated setup with custom piping. But the engine certainly does help! 22psi isn't quite straining it, though....
Power seems about the same as a Green.

Do you have the Cosworth heads also? Just curious why the dyno only goes to 7k rpm.
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Old 09-14-2007, 06:28 PM   #7
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Graphs look great.

Quote:
Originally Posted by Phatron View Post
Power seems about the same as a Green.
Don't know if my conversions are correct, but I haven't seen many 480+ whp and 500+ wtq greens. Although that is at 1.14 correction.
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Old 09-14-2007, 06:32 PM   #8
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Quote:
Originally Posted by AVOturboworld View Post
Sorry, all the AVO parts are bolt-on, is what I meant. It's not a rotated setup with custom piping. But the engine certainly does help! 22psi isn't quite straining it, though....

Cheers,

Paul Hansen
www.avoturboworld.com
some of us understood others....lack insight....

I give you for those kind of results
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Old 09-14-2007, 06:39 PM   #9
Phatron
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Quote:
Originally Posted by OppositeLock View Post
Don't know if my conversions are correct, but I haven't seen many 480+ whp and 500+ wtq greens. Although that is at 1.14 correction.
Quote:
Originally Posted by AVOturboworld View Post
500ft/lbs of torque at 4000rpm! 427hp made it to the wheels,
05 STI FP 7cmGreen - Pump/Meth 24psi
402whp 458wtq

I thought the 8cm greens on race gas are right around there. I cant find any right now. I cant see most of the plots cause they are blocked at my work.
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Old 09-14-2007, 06:40 PM   #10
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Quote:
Originally Posted by SubyDuz View Post
some of us understood others....lack insight....
its called sarcasm
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Old 09-14-2007, 06:48 PM   #11
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Paul, Is this a twin scroll turbo or is it single scroll?

CLark
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Old 09-14-2007, 07:02 PM   #12
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only twin i have seen on their site is the vf36

looks to be single in the pics
http://www.avoturboworld.com/pdf/AVO...bochargers.pdf
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Old 09-14-2007, 07:26 PM   #13
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Why is the graph shown with a 1.14 correction factor? That would make actually whp 428whp with the normal 1.0 correction.
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Old 09-14-2007, 07:41 PM   #14
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Default

We have a larger (450 based) twinscroll turbocharger prototype that we tested on that car, which made about 400whp. That was a prototype, however, and the final units are still being finalized for production. The turbo on this car is a plain-jane AVO550, with a 55lb/min compressor wheel, bolts to a stock intake (in terms of size, not that we used one!) and the hotside bolts to any downpipe using the standard Subaru flange.

It's not a drag car, instead a circuit/time attack car, so we've concentrated the setup on that. Peak torque at 4000rpm gives us more than enough flexibility at the track - in fact, it probably wouldn't hurt if peak torque was at a higher point, because we are still having straight-line traction problems, even with the ginormous rubber!

With the stock MAF in place, we aren't going to make much power past 7000rpm, that's the main reason it doesn't go past there. This project was to see where we could go with our product as it is, not some max figure that would be almost impossible to replicate by anybody else. Sort of like the little red wagon with a custom AVO turbocharger setup has hit 480-500whp with a 2.0-liter motor.

Cheers,

Paul Hansen
www.avoturboworld.com
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Old 09-14-2007, 08:38 PM   #15
basoora
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Default

nice set up
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