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08-31-2010, 01:09 PM | #1 |
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Location: Chicago, IL
Vehicle:2013 BRZ SWP |
06 Saabaru 18G-XT 341whp/326wtq on an Uncorrected DynoJet.
Event: Dyno Pull
Location: P&L Motorsports (Chicago, IL) Ambient Temp: 95 degrees Fahrenheit Elevation: 600 feet Weather: Hot, 36% Humidity Tires: 245/40/17 RE-01R Tires Car: 2006 Saab 9-2X Aero (2.5L) Tuner: Jorge Dyno Info: DynoJet Transmission: 07 STI 6 speed Gear: 3rd Peak HP at RPM: 341.5 Uncorrected Peak Torque at RPM: 326.30 Uncorrected Baseline hp/tq for a stock on same dyno: ~210-220whp (Stock STI) Target Boost: 20psi tapering to 18psi Target AFR: 12.0 Fuel: 93 Octane from Shell (Sitting in the tank for over 2 weeks) Power Mods: EJ255 w/ 100mm CP Pistons (~8.8 CR) ACL Bearings ARP Headstuds GSC S1 Cams (266/266) Supertech Valvetrain Blouch 18G-XT 8cm (Coated Exhaust Side) Spearco TMIC Tial 44mm External Wastegate GT-Spec Headers and Uppipe (Wrapped) TurboXS 4" Downpipe (Wrapped) P&L Street Exhaust TGV Deletes P&L HiFlo Intake Samco Turbo Inlet GM BCS Deatschwerks 850cc Injectors Walbro 255lph Fuel Pump Drivetrain Mods: Exedy HD Clutch OEM Flywheel Kartboy Short Shifter and Bushings Group N Engine and Transmission Mounts Suspension Mods: Endura-Tech Coilovers Whiteline Front and Rear Sways w/ Kartboy Endlinks
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Last edited by cireturbo; 08-31-2010 at 01:18 PM. Reason: Graph added. |
08-31-2010, 01:39 PM | #2 |
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Why only a 3rd gear pull, shouldn't it have been in 4th with the 6 speed?
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08-31-2010, 02:15 PM | #3 |
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Hot day, static air. But yes, it would have made a bit more power and spooled sooner in 4th.
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08-31-2010, 02:18 PM | #4 |
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07 6 speeds have longer gears, more like the 5 speed.
numbers look good OP |
08-31-2010, 10:21 PM | #5 |
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hows it feel?
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08-31-2010, 10:42 PM | #6 |
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id pass on the 18g....
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08-31-2010, 11:32 PM | #7 |
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my sentiments exactly, opposite. the 18g isn't the 18g anymore. These new big wheels and hotsides change things a little. For example the 16gxt is supposed to be 42lbmin ( old 20g is 44lbmin) and the 16gxt is the one that you can't get the 10mm hot side on. Last year's popular opinion that the 2.5 engine needs at least an 18g at the very least if upgrading from stock, i think things have changed. These new units are more efficient (i suspect) and bigger. The Ratio of flow from the compressor to the turbine has gotten smaller, and the size of both has grown.
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09-01-2010, 01:39 AM | #8 |
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I'm starting to suspect a boost leak, it's spooling at least 700rpm slower than my TD05 20G 8cm did.
It's a billet 43 lb/min wheel, where as the 20g was a standard 44 lb/min. |
09-01-2010, 01:59 AM | #9 |
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I've been saying this for a while now, but the new "miracle" billet wheel turbo are more hype than anything else. 341whp on a cammed motor with an EWG and with full boost after 4000rpm is nothing special at all. As the OP has already noted his old 20G spooled better I typically see similar power with 20G's running IWG on stock motors.
They are simply bigger comp wheels. They make more power than their "old" namesakes but spool slower. Wow... the laws of physics are actually real ?!? Whodathunkit? |
09-01-2010, 02:08 AM | #10 | |
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Quote:
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09-01-2010, 02:50 PM | #11 |
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Couldn't find any boost leaks, no cracks or leaks in the exhaust either.
Anyone want to take a wild guess why this turbo is spooling nearly 1,000rpm slower than my TD05 20g 8cm did? |
09-01-2010, 02:52 PM | #12 |
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Nice power. Wish I made that much.
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09-01-2010, 03:04 PM | #13 |
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Rare is the Blouch billet wheel turbo that doesn't spool late, sad but true, even the small ones. You even have all the "right" mods for earlier spool. They do make good power though, you just have to wait for it.
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09-01-2010, 03:19 PM | #14 | |
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Quote:
Compared to my Blouch TD05 20g 8cm, I picked up maybe 10 horsepower on the top end but don't think it was worth the delay in spool. If something is mechanically wrong with the turbo it'd be an easy explanation, but if it's working properly and spools like this I'm quite disappointed by it. |
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09-01-2010, 03:21 PM | #15 |
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09-01-2010, 03:27 PM | #16 |
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This exact same setup was spooling a TD05 20g 8cm well before this 18G-XT 8cm. On the road in the 3rd gear it would hit 17psi by 3100 rpm (with a 5 speed). Currently on the road in 4th gear (07 6 speed) it's not spooling till almost 4000 rpm. Obviously weather and humidity are partly to blame, but is it possible for those two variables to affect spool by 700 rpm?
Again, only changes were the turbo and 6 speed. Everything else has remained the same. |
09-01-2010, 03:30 PM | #17 |
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subscribed
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09-01-2010, 04:24 PM | #18 |
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Spool looks slow for the 18G-XT. I added some graphs from EFI Logics tuning the 18G-XT.
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09-01-2010, 05:16 PM | #19 |
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Torque seems relatively low for a 2.5 in comparison to hp. Usually it's reversed. I can't imagine your tuner would turn down the torque for your built setup. Seems weird.
Also, I think it's strange (looking at the graphs) that a built motor running E85 and FMIC does not kick ass on the much more stock pump gas setup -- a few more hp, and a lot less tq! Maybe you should try a 10cm^2 hta68. |
09-01-2010, 05:28 PM | #20 |
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Why is the OP dyno graph/pull uncorrected?
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09-01-2010, 05:47 PM | #21 |
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Because the chart is from P&L and they always report uncorrected numbers.
Corrections are more for N/A, They tend to "over-correct" turbo cars. RiftsWRX (Jorge) has comments throughout PPB about his take on the corrections, no need to re-hash. |
09-01-2010, 11:37 PM | #22 |
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I have seen a 500 rpm differents in spool from a 3rd to 4th gear pull on an 07 STi with a GT30R. But still for a 18g with a build engine and higher comp pistons.
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