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Old 08-24-2004, 11:10 AM   #51
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congrats on the power...now that's area under the curve. way to go N/A!!!maybe i should go to the turbo forum and offer them a kleenex....
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Old 08-24-2004, 01:21 PM   #52
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I cant wait to finish my build so i can have that power too.
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Old 08-24-2004, 02:11 PM   #53
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Matt-

Where is the drag run??? JK, I was just curious if you have used you little pass yet to see how the car does? Keep up the modding.
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Old 04-13-2005, 05:47 PM   #54
Matt Monson
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Bizzump in anticipation of my dyno run in 15 minutes. We'll see what the car puts down with a new motor,higher compression, and a catless track pipe...
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Old 04-13-2005, 07:42 PM   #55
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Quote:
Originally Posted by Matt Monson
Bizzump in anticipation of my dyno run in 15 minutes. We'll see what the car puts down with a new motor,higher compression, and a catless track pipe...
Did you go with the 12.1 pistons? What is new about the motor? Did you get any type of tool to tune the beast with yet?
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Old 04-14-2005, 07:28 AM   #56
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I can't wait to see these numbers.
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Old 04-14-2005, 10:48 AM   #57
Matt Monson
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Angry

Well,
I cannot say that I am a happy camper right now. We ran my car, and it did all right, but my little voice had been telling me there is something amiss with my car, and the dyno verified it. I have a blown center LSD. We verified it when the car refused to back off the dyno. With the front wheels on the deck and the rears still in the rollers, it just spun there. We rocked it back and forth a bit, and once the rears were on the ramps and the fronts hit the rollers, it got stuck again. Good thing I bought a new tranny last week.

Anyways, I pulled 134.4whp. Stock RS's and other 2.5l cars have been pulling 95-100whp. It is a dyno dynamics unit, and they read much lower than most. They haven't run any stock WRX's on it yet, but ones with cat-backs are running 160-170whp. That's what stock WRX's run on Cobb's dyno. And the highest a stock STi has run on this unit is 230, while they run closer to 240 on Cobb's.

So, while I am getting 35-40whp over stock, we figure there is another 10-15whp missing because of the bad tranny. I will replace the tranny shortly, and will run again once the car is healthy. And please don't ask me to post the graph. It isn't worth my effort on a sick car...

And just so people know where the engine currently stands: I recently replaced my shortblock with a 20k mi stock unit (The STi block is still sitting waiting for pistons). Added a thin Cometic HG for 11.4:1 CR, still have all the other stuff listed prior like Cobb cams, headers, intake and Stromung exhaust...
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Old 04-14-2005, 10:57 AM   #58
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Sorry to hear about your tranny, Matt. When are we gonna slap in that new one?
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Old 04-14-2005, 11:45 AM   #59
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hey matt, i'm running a VERY similar setup to you right now...
ganflow cai
spicy cams/valvespings
low profile gaskets
brullen el-headers/high flow cat
stromung catback
exedy flywheel/stock clutch

'02 phase II ej25 w/ ~50k on it

How much is the dyno time costing you?
I'm thinking of buying one of the perfectpowers and getting it dyno-tuned since i'm running really friggin rich under ~3k rpm and i imagine there are probably another 10hp to gain from this....

any ideas on how to raise the readline other than a link or hydra?
you're running 93 octane i assume?
any change to the sparkplugs?
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Old 04-14-2005, 01:27 PM   #60
Matt Monson
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I run the PFR5 dual tip platinum NGK's. I was running pig rich on the stock heat rating. Those plugs are one step hotter than stock.

I am currently running 89 octane. When I first bumped the CR, I ran 91 and fouled my front O2 sensor pretty quickly. I haven't seen detonation on 89, but keep in mind I am at 5000ft. We can get away with such things up here that folks at sea level may not be able to pull off...
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Old 04-14-2005, 01:39 PM   #61
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very interesting.
I used to run 89 before the cams etc.
you think the hotter plugs are worth it? (pretty cheap at least)
i'm getting a really rough idle right now, it does a lot of searching and i get a fair bit of vibration. did you ever encounter this? solutions or ideas??
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Old 04-14-2005, 02:46 PM   #62
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Lame on the tranny issues Matt. Your work is never done

I have got to get over to Rupair/Tarmac to get me Leggy dyno'd. (I'll bet she'll pull 150-160hp/170-180ftlbs - but I could be wrong)
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Old 04-14-2005, 02:57 PM   #63
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awesome dyno graph matt!
sorry for ur tranny problem? what kind of tranny are u putting in now?
bump for new dyno graph!

would like to see dyno graph on staticfirtz's car too!!
(coz i'm getting brullen EL header and high flow cat this summer~ )
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Old 04-16-2005, 05:14 AM   #64
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Sounds good, Matt, definitely interested to see the revised numbers once you get the tranny squared away.

Just for comparison's sake, I pulled 140 or 142whp (can't remember, I'm sure I could search and find it) on a Dyno Dynamics unit when I was up in CT. That was the last time I had the car dyno'd (after adding an Injen CAI). The average of my 3 baseline runs (on 2 different days) was like 104.3whp, so we're in the same ballpark.

Pat Olsen
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Old 04-16-2005, 01:47 PM   #65
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I'm looking forward to reading up on your dyno numbers when your tarnny gets fixed as well. Good luck!
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Old 04-18-2005, 10:52 AM   #66
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Tranny replaced, along with an Exedy flywheel, STi tranny and motor mounts and Cobb shifter bushings. I will try and get back to the dyno this week...
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Old 04-18-2005, 02:46 PM   #67
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dyno results dissappeared. hosting problem?
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Old 04-18-2005, 05:09 PM   #68
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Quote:
Originally Posted by Kevin Thomas
Lets see if I got this right. I'm doing this at work between er....working. I resized the image and hopefully uploaded it right (damn firewalls). Here it goes!



And good lord, your torque curve is something to die for. Awesome! Cobb should be paying you for putting up this ridiculous dyno.

Just requires looking at the whole post...unless you were in reference to the most recent dyno Matt had, in which case it just takes reading the whole post

Jared
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Old 04-19-2005, 12:09 AM   #69
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Matt,

I must say that at this point, between here and the Cobb forums, you are no less than a Subaru-modding god for the rest of us unwashed masses!

So sorry to hear about the tranny but was glad to see you got it replaced so quickly! Did you just replace it with another stock tranny? Any ideas as to what you did to melt your center diff, or was it just the 100k+ "normal" (read "normal" as driving in a way that only Matt Monson can) wear and tear that did it?

As others have said countless times before on this post, you are an inspiration to us all! Just 3 weeks ago I installed the Cobb CAI, the first step in a long progression that will lead me to a build quite similar to yours. I LOVE my NA Subie, I LOVE the AWD! Thanks for all the wisdom and encouragement!
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Old 04-19-2005, 09:47 AM   #70
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You car looks great, I am just so sad to see that it takes everything you have done just to gain 20 WHP. I would like to put down 180+ WHP on my '98 RS. After looking at your dyno sheet, and list of mods I don't know how practical it is to do that. Good numbers and awesome torque curve.
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Old 04-19-2005, 10:19 AM   #71
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Quote:
Originally Posted by keirnna
You car looks great, I am just so sad to see that it takes everything you have done just to gain 20 WHP.
Actually, this car is putting down ~35 whp above a stock RS. Super Rupair's dyno reads low. Personally, I don't think the raw horsepower numbers tell the whole story. The car is a blast to drive (almost as much fun as my wagon ). That torque curve is about as close to perfect as you can get. This car would embarass a stock WRX on a tight road course.

I think there are still some more gains to be had once Matt gets around the lame-o stock fun...er, rev limiter.
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Old 04-19-2005, 10:23 AM   #72
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The think is I have a 350.5 WHP STi, but I don't want to rally cross it. I want my RS to be a rallyX car, along with my daily driver. I want to use the STi rarely and mostly for paved track events.
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Old 04-19-2005, 12:30 PM   #73
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Keirnna,
I saw your other thread, but feel like replying here. The cheapest, easiest way to make some good power with your '98 is to change to a phase II EJ25 shortblock and get some cams. A wagon equipped with just that set up put down 134whp on Super's dyno yesterday. So, for $1000, you can make your motor powerful enough to make your RS WRX fast. To get those higher numbers you desire, custom pistons and headwork will be required.

And no I am not a GOD. I am just a guy who loves cars and knows a bit, and chooses to share it with others. There are plenty of guys here that are putting down more power than me. Someday it would be nice to claim the most powerful street driven NA RS in the country, but who knows if that will ever happen. But I try not to get my ego too rapped up in my little subby...
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Old 04-19-2005, 12:44 PM   #74
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Matt, thanks for the responce. I don't think you are a god, but you are definitley a fellow enthusiest with a great car! Like I posted I planned to put a phase II block in and use my phase I heads. Can I do this without some type of aftermarket EM? Do you know what the exact CR will be?
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Old 04-19-2005, 02:16 PM   #75
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Somehow I knew I was going to confuse people. The god comments were meant for kulaid. I was just too lazy to go back and look up who said it, so skipped a line and started typing a new thought...

AS for the questions: No EM required and 11.5:1...
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