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Old 01-06-2004, 12:15 AM   #1
xephyr
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1998 2.5 RS-T
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Default 381WHP & 403ft-lbs at the dyno today

Below are two corrected graphs. One has my max HP(381whp), the second had my max Torque(402.8 ft-lbs). The max torque graph was a relatively early run, taken while the engine and intercooler were still cool. When compared to the final graph (high HP graph) it also shows some of the progress in power gains I was able to achieve during the dyno tuning session. Unfortunately, I ran out of time to finish fine tuning the fuel and ignition maps, but I should have enough info on my datalogger to make decent adjustments for my next visit to the dyno. Also, I was only running 20 psi on this tuning session; my next visit will probably be at 24 psi.
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Old 01-06-2004, 12:16 AM   #2
xephyr
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Here's the graph with the high torque numbers:
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Old 01-06-2004, 12:18 AM   #3
xephyr
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Below is the UNCORRECTED graph:

Just a reminder for everyone who doesnít remember my car, itís a 1998 2.5 RS. I recently changed the block to a 2.5 STi block.

Also, many thanks to Joe at Mike Shaw Subaru / Flat 4 Engineering for helping me source all the parts I needed for the fabrication of this project. ( www.flat4engineering.com )
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Old 01-06-2004, 04:13 AM   #4
ImprezzvRS
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thas pretty, when do i get a ride congrats
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Old 01-06-2004, 08:45 AM   #5
docwhorocks
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Nice
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Old 01-06-2004, 03:40 PM   #6
serious
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All i can say is DAMN!
Brent
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Old 01-06-2004, 03:44 PM   #7
totoherbs
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Nice numbers!

Why did you change to the STi block?
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Old 01-06-2004, 06:16 PM   #8
stimpy
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Power to the old-school turbo Scoobs!

What turbo setup are you using?

-Jon
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Old 01-06-2004, 06:21 PM   #9
Matt Monson
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Very nice numbers. I too want to hear about your switch to the EJ257 block. Many of the Legacy Turbo crowd has followed your car and are going to be dissappointed that you retired your EJ22 block.
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Old 01-06-2004, 06:38 PM   #10
HpiRally
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.....thats awesome.....pics of the car???

Joe
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Old 01-06-2004, 11:18 PM   #11
xephyr
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1. Turbo is a custom turbo built by T.E.C. (Turbo Engineering Co) in Golden ,CO. It's based off of a Garrett ballistic GT35R, but with a smaller exhaust housing, which is why my powerband starts relatively early considering the HP levels.

2. Why the EJ25? Well it was a real difficult decision, considering how much luck I had with the EJ22t! Let's just say the guys at Mike Shaw / flat 4 "pushed" me into it!!! They needed someone to fully test the block before they started bragging about how stout it was, so I guess you can say I'm a guinea pig of sorts. They figured if anyone would fearlessly push the engine to the limits, it would be me; and I have enough sense and experience to not blow it up from a stupid mistake. Also, I really didn't spend much money for the engine transplant, since it's for "testing" purposes...

3. Pics of car - I don't have a working digital camera, but I'll see what I can do. If you are patient enough, Turbo Magazine might be doing an article on it soon, which may be out by springtime. It's not much to look at anyways, the outside of the car is completely stock, even down to the gold wheels. It only becomes obvious that it's modified when you pop the hood!

Mark R.
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Old 01-06-2004, 11:41 PM   #12
joubtt
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Old 01-07-2004, 12:06 AM   #13
parker/slc/gc8fan
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gc pride
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Old 01-07-2004, 01:33 PM   #14
Charlie-III
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Nice setup. Why the wiggles after ~5200RPM's?

Is it an issue with intake/exhaust restrictions?

What else is done to the engine and related parts (if it is not too much of a secret?)
CAI?
Headers and if so, what brand?
CAT and cat back?
Head mods?

Nice job anyway. Bet it really opens up some eyes when you do a launch.
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Old 01-07-2004, 01:40 PM   #15
stimpy
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Quote:
Originally posted by xephyr
It's not much to look at anyways, the outside of the car is completely stock, even down to the gold wheels. It only becomes obvious that it's modified when you pop the hood!
That is the way it should be. My car is also incognito.

-Jon
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Old 01-07-2004, 03:06 PM   #16
CrotchRS34
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It would help if you didnt like men as much as you do your car might be faster.
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Old 01-07-2004, 04:06 PM   #17
xephyr
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Quote:
Originally posted by CrotchRS34
It would help if you didnt like men as much as you do your car might be faster.
Hey, I'm not the one with "Crotch" in my name!!!
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Old 01-07-2004, 04:38 PM   #18
Drac9
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Quote:
Originally posted by CrotchRS34
It would help if you didnt like men as much as you do your car might be faster.
You suck at teh engrish
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Old 01-07-2004, 05:41 PM   #19
Matt Monson
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Quote:
Originally posted by Charlie-III
Nice setup. Why the wiggles after ~5200RPM's?

Is it an issue with intake/exhaust restrictions?

What else is done to the engine and related parts (if it is not too much of a secret?)
CAI?
Headers and if so, what brand?
CAT and cat back?
Head mods?

Nice job anyway. Bet it really opens up some eyes when you do a launch.
Charlie,
This should help:
http://forums.nasioc.com/forums/show...5&pagenumber=1
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Old 01-07-2004, 07:46 PM   #20
xephyr
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1998 2.5 RS-T
Black

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Quote:
Originally posted by Charlie-III
Nice setup. Why the wiggles after ~5200RPM's?

Is it an issue with intake/exhaust restrictions?

What else is done to the engine and related parts (if it is not too much of a secret?)
CAI?
Headers and if so, what brand?
CAT and cat back?
Head mods?

Nice job anyway. Bet it really opens up some eyes when you do a launch.
What's causing the wiggles? - I have several theories on what's causing it, and it's probably a little each of several factors:

1. The heads being used are stock RS DOHC heads. I have ported heads, but they are in the process of having the seats re-cut, so they aren't on the engine. The heads could be "choking" the exhaust flow, but due to the smaller ports sizes and resultant higher gas velocities, the stock heads are probably why my torque and hp numbers are so strong so early (relative to other numbers of this size).
2. Cams are also stock, which could also explain the top end instability, but is also probably helping me with the early, strong powerband.
3. Turbo could be choking; although the turbo is based on a GT35 series turbo, remember it is a custom made hybrid designed for a good early powerband on my previous EJ22t setup. This means I have a small exhaust housing relative to what most people would typically run for these power levels.
4. Spark plug gaps could be too wide, and I could be having slight combustion issues up top. I recently added a MSD DIS-2 ignition system to boost spark output, and let me run wider spark gaps. Believe it or not, I ran the dyno run with 1.1 mm spark plug gaps. I might have gotten too carried away!! This is the first thing I'll be messing with before I go to the dyno again.
5. Finally and most importantly, I think my fuel settings are slightly too rich up top. I progressively leaned out the top end throughout the dyno session, and the line kept getting smoother and smoother. Unfortunately, I ran out of time at the dyno, so these fuel adjustments will have to continue next time.

To answer the other questions:

1. CAI - I just have a duct which blows fresh air at the air filter; I'll try and get some pictures this weekend under the hood.
2. Headers - It's just a stock exhaust y-pipe which I hand ported myself. It took half a day to do and lots of air compressor power!
3. Heads - mostly stock (all I can say right now)
4. No cats. Upipe is hand fabbed, as well as the downpipe and rest of the exhaust. Turbo back is 3" including flanges. Up pipe is 2 1/8" id.

Hope this helps,
Mark R
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Old 01-08-2004, 11:57 AM   #21
no-coast-punk
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Mark- Would you happen to have a compressor map of that turbo? I'm looking at bumping my output quite a bit in about 9 months, and I'm already at the very bleeding limits of the VF-22. Also, what is the A/R of that turbine? any more info on that special little piece would be much appreciated.
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Old 01-08-2004, 02:02 PM   #22
xephyr
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Quote:
Originally posted by no-coast-punk
Mark- Would you happen to have a compressor map of that turbo? I'm looking at bumping my output quite a bit in about 9 months, and I'm already at the very bleeding limits of the VF-22. Also, what is the A/R of that turbine? any more info on that special little piece would be much appreciated.
Due to my deal with Turbo Engineering Co (TEC) I can't divulge all that info. I can tell you the exhaust turbine is a 0.86 A/R, and the compressor is a T04S? 0.70 A/R with a 4 inch inlet. You can call Jim at TEC however, and he'd probably help you out with the other info:

Jim Latour (owner)
Turbo Engineering Co (TEC)
17222 S Golden Rd # G
Golden CO 80401
http://www.turboengineering.com/
303-271-3997

Tell him you are wondering about Mark Ramirez's turbo and he'll know exactly what you are talking about.


Mark R
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Old 01-11-2004, 06:45 PM   #23
hoodwho
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Mark,

maybe i missed it.. but what Tranny are you using?

thanks,
Mike
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Old 01-11-2004, 09:21 PM   #24
xephyr
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Gears are from Modena (previously only available from MRT). It is their phase 1 type gearset. Their new phase 2 gearset is much stronger, but I haven't had any issues with breakage on their phase 1 gears, so I don't plan on changing over. Plus their phase 2 gears are over $2000 more.

Gears 1 and 2 are their type E ratios. 3rd, 4th and 5th are type D ratios. If you want the exact ratio numbers, I can look them up and post them here. Final drive is 3.9:1. I am also using their shift interlocker kit to prevent any occurrence of shifting into 2 gears simultaneously (very bad - instant tranny lockup).

Mark R
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Old 01-12-2004, 08:46 PM   #25
hoodwho
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k thanks!.

p.s. arent you a 2.5 again?

(your info)
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