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02-27-2010, 01:34 AM | #1 |
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Maxwell Power Tuned, 2.35L GT35R 537whp and 9k rpm, 4K rpm power band
26 psi tune on a destroked 2.5L with long rods. Displacement is 2.35L. Here's the build thread: http://forums.nasioc.com/forums/show....php?t=1924076
Event: dyno tune Location: Maxwell Power Services in Arlington, WA Ambient Temp: 55F 67%humidity Elevation: 200ft Weather: Seattle Weather Car: 2007 STi Owner: Dominic Acia Tuner: Dominic Acia of Maxwell Power Services (DomTune) Dyno Info: DynoCom Peak HP at RPM: 537@6250 whp SAE corrected Peak Torque at RPM: 463 SAE Corrected @ 5950rpm Baseline hp/tq for a stock on same dyno: 245whp Target Boost: 26psi Target AFR: high 11's Fuel: Pump 92oct Method: AEM Engine/Power Modifications: *MPS Power Factor SS 2.35L shortblock: JE Pistons, full blueprint, Long Rods, 75mm crank, 8.3:1 CR *BC 272 Cams, Ferrea Valves and Supertech Springs, Polished 11mm oil pump *GT35R w/.82 housing *Perrin FMIC *ID 1000cc injectors, TGV Deletes, Grimmspeed Spacers, rotated 09 FXT black intake manifold thanks for looking, Dominic Acia Maxwell Power Services Arlington, WA 360-474-8225 retuned YOU CAN'T ARGUE WITH A 4K RPM POWER BAND OR 152MPH IN 4TH GEAR!!
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Last edited by Maxwell Power; 03-20-2010 at 12:33 AM. |
02-27-2010, 01:44 AM | #2 |
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Vehicle:2002 WRX V9 6mt R180 Brembos |
Wow I really like the looks of this powerband, From 5000rpm to 9000rpm its pull pull pulling!
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02-27-2010, 01:46 AM | #3 |
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Vehicle:1990 Legacy wagon goes 12.387 @ 116.5 |
That is some serious RPM!
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02-27-2010, 02:02 AM | #4 |
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Vehicle:2002 s256 twinscroll now with one more gear |
that is one nice graph love how it hold pretty much 300wtq at 9k and almost 500whp
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02-27-2010, 02:06 AM | #5 |
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Location: Xona 78•64 UHF
Vehicle:2002 WRX V9 6mt R180 Brembos |
Dom before long I am going to be building an engine that will handle 650whp no problem, do you think this type of setup maybe different cams and add some iron sleeves would be a good choice for a 650 awhp E85 beatings regularly? Obviously it will need some serious maitenance/upkeep but what are your thoughts?
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02-27-2010, 02:07 AM | #6 |
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I like the look of that graph dom!
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02-27-2010, 03:14 AM | #7 | |
Former Vendor
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Quote:
This is what we're going to do in our drag car. Only the drag car will have bigger cams and ported heads. This car has factory ports which explains why the power is so flat at the end; they're pretty much at their limit I think. I'm going to try more boost once I fix the clutch and see what happens. After that I'm going with bigger cams. After that, porting the heads. Doing a lot of R&D to see what really makes this engine move air. |
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02-27-2010, 03:15 AM | #8 | ||
Former Vendor
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Quote:
Quote:
thanks guys. I hate lag, but once the power comes on it's an awesome ride. With the 07 gears it's even more fun because you can do around 140 in 4th and about 80 in 2nd. |
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02-27-2010, 09:24 AM | #9 |
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Vehicle:2003 Subaru WRX in the 10's and the bends |
What clutch were you using?
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02-27-2010, 10:26 AM | #10 |
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out of curiousity, why destroked? just something you felt like doing or benefits behind it?
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02-27-2010, 11:02 AM | #11 |
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Vehicle:2006 WRX-pte6262 CTS-V,& 05 RS |
stock location turbo?
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02-27-2010, 11:06 AM | #12 |
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02-27-2010, 12:06 PM | #13 |
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Vehicle:GTX 3071R'd 11WRX PPG,4.44,LSD,E85,6spdx3 |
Thats just nuts. Dom your the man.
I want to build a block like this. I wonder what this would do with a 30R sized turbo? "wider powerband vs greater topend" |
02-27-2010, 12:44 PM | #14 |
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80 mph in second gear sound damn awesome.
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02-27-2010, 12:50 PM | #15 |
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Vehicle:GTX 3071R'd 11WRX PPG,4.44,LSD,E85,6spdx3 |
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02-27-2010, 03:52 PM | #16 |
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nice build, nice results from, 2.35 in a us sti is 1 of a kind
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02-27-2010, 04:00 PM | #17 |
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nice work
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02-27-2010, 05:00 PM | #18 | |
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Vehicle:TBD Looking for STI Back in the Game! |
Quote:
I love high RPM shifting. Sweet whip ! |
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02-27-2010, 06:24 PM | #19 |
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Vehicle:07 STi Limited EFR 8474 TS EWG |
what happen with brand new clutch?
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02-27-2010, 07:11 PM | #20 |
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02-27-2010, 11:17 PM | #21 |
Former Vendor
Member#: 190729
Join Date: Oct 2008
Chapter/Region:
NWIC
Location: Marysville, WA
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02-27-2010, 11:19 PM | #22 |
Former Vendor
Member#: 190729
Join Date: Oct 2008
Chapter/Region:
NWIC
Location: Marysville, WA
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clutch update. the retaining ring that holds the throwout bearing in place was jammed up in the mechanism.
I replaced the pressure plate this morning and everything works great. I also found out that my methanol system wasn't getting power... the line was cut. I cut it yesterday when I was moving the control unit and forgot to reconnect it. So this tune was on pump gas.... I'm doing a compression check on tuesday. |
02-28-2010, 12:44 AM | #23 |
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Vehicle:2002 wrx srp |
any benefits of destroking a 2.5 liter versus stroking a 2.2 liter?
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02-28-2010, 09:45 AM | #24 | |
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Quote:
Might be an idea before going balls out in the future to test for a difference in Air Fuel ratios with the methanol system on and off, just to make sure that the system is actually functional. on the bright side, at guess we now know that it is possible to push that kind of power on pump fuel, given the setup.. |
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02-28-2010, 12:08 PM | #25 | |
Former Vendor
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Quote:
Yeah, you're completely correct, I screwed up. My only defense is that I was sick as hell that day and being pulled in a ton of different directions by employees, customers etc. On top of that, I wasn't doing the driving on the dyno so I couldn't see the LED that says the meth is active. I should have told my guy to watch the light. Combine that with the sticking clutch issues and my mind just wasn't in the right place. My own fault 100%. However, it does explain a lot of things. The first being the lean hump at peak boost. I tried and tried to get that down, but it wouldn't happen no matter how much fuel I added. I had plenty of injector duty to work with but it just didn't seem to help. I thought I was having an issue with Accel fuel. Now looking back I know it was an indication that my fuel pump is just about maxed and possibly the stock fuel rails. I've been running the stock rails and one walbro for some time just to see what the actual limit is. I'm guessing this is it. Had the meth been active, it would have reduced the demand on the fuel system dramatically and I would have been able to control AFRs just fine. In this case (no meth) as the VE dropped and my fuel demand went down, my AFR's came back to target. The only thing that saved me (I think) is the high piston speed. Knock isn't a big factor when you rev that high. I seem to recall on of my tuning instructors tell me that "knock doesn't happen over 6400rpm". That's not entirely true. It can happen on Subarus over 6400 due to the lower piston speed and short rod ratios. However, this motor was spinning very fast with a better rod ratio and had higher pistons speeds thus negating the effects of detonation over 7k rpm. One other thing to add: while knock might not be a big factor, pre-ingition can still occur and destroy the motor very quick. Only at these rpms it can happen without warning because you don't have any knock events to tell you you're getting close. |
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