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Old 03-21-2009, 07:58 PM   #1
BugBomb
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99 OBS & SUXASS
May your line be smooth

Default Auto-x Setup (10.5:1 Compression / E85 / 22psi) 369HP/395TQ

Just to be clear, this is not a drag car. The purpose of this build was to get loads of usable torque from very low RPM and improved throttle response. So far, I believe it works nicely.

1994 Impreza L
EJ255 Block
WRX (2.0L) Heads
Wiseco Custom Forged Pistons
*10.5:1 High Compression Ratio
*Dish Configuration Similar to EJ20 Pistons
Stock Rods
Upgraded Bearings
ARP Head Studs
AEM Short Ram Intake
Blouch 18G Turbo @ 22psi
Ported Stock Manifold (Wrapped)
TXS Externally Gated Up-pipe
TIAL 44mm Wastegate
TXS Shorty Bellmouth Downpipe
RFL Exhaust
E85 Fuel
TXS Utec/Delta

Tuned at TurboXS by Jermaine and extremely happy with the results!

The green line on this dyno sheet is an experimental map that ramps the boost up slowly for tighter courses.

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Last edited by BugBomb; 03-21-2009 at 10:34 PM.
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Old 03-21-2009, 08:09 PM   #2
ChuiSTi
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wow 380 ft/lbs at 3000 rpm...monster
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Old 03-21-2009, 08:58 PM   #3
Praet0rian
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... and on a lightweight Impreza L. I applaud you!
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Old 03-21-2009, 09:06 PM   #4
speedyHAM
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XP class Impreza L

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Nice- what class and what are your other mods to the car?

I'm building a '96L into an XP class car myself. You have me on power by about 130 right now.
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Old 03-21-2009, 09:15 PM   #5
Spitfire8o5
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thats legit! how do you plan on hacing that stay on the road lol
suspension?
rims, tires?
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Old 03-21-2009, 10:18 PM   #6
nhat
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it's got a 5x114.3 hub swap. last year, they were running 17x9 cobra r wheels
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Old 03-21-2009, 10:26 PM   #7
rexworx
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wow that thing looks great...
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Old 03-21-2009, 10:27 PM   #8
96SubyImpreza
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That must hit so ridiculously hard.
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Old 03-21-2009, 10:33 PM   #9
BugBomb
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My brother and I have been building this car mainly for raw time and non-SCCA local clubs. It was in SM last year but this year we will have to be FP on account of our ALK and the fact that we don't meet minimum weight for SM. The car is somewhere around 2,780 lbs with a 6-point roll bar. Other items on the car:

Megan Racing Coilovers (7K front/5K Rear)
27mm Adj. Front Swaybar
Stock 13mm RS Rear Swaybar

Full '05+ STi Drivetrain Including:
6-Puck Clutch/Lightweight Flywheel
STi 6-speed
DCCD w/ Manual Controller
Aluminum Driveshaft
R180 Rear Diff
STi Axles
'05+ STi Hubs/Bearings (5x114)
Stoptech Front Brakes
STi Rear Brakes

Race wheels are nasty, heavy Mustang Cobra rims (17x9) usually with 275 Hoosier A6s. Street setup uses 245-width Dunlop Direzza Z1 SS. Videos of the car here:
http://www.youtube.com/user/UBSLIPN
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Old 03-21-2009, 11:08 PM   #10
mxpunk
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nice setup but i must ask..if it weighs 2700 lbs why didnt you just start with a gd chassis and gut it?

2700 lbs is hella heavy for a gc unless its still full weight and has the roll cage..
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Old 03-22-2009, 12:02 AM   #11
Spitfire8o5
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TimeAttack DC #117

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hahaha im jealous.. sick car man.. i still have a long way to go.. i regreat gettin my d2 coil overs planning on getting something else sometime but f&r sway bars and i cant really afford hoosiers! i bet their nice tho... probably just going to go with some regular toyos or azenis or something more daily that i wouldnt have to switch
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Old 03-22-2009, 12:04 AM   #12
speedyHAM
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XP class Impreza L

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Quote:
Originally Posted by mxpunk View Post
nice setup but i must ask..if it weighs 2700 lbs why didnt you just start with a gd chassis and gut it?

2700 lbs is hella heavy for a gc unless its still full weight and has the roll cage..
2700 lbs is a little lighter than stock without a roll cage for a GC. With the roll cage 2700 is not too bad, but there is a lot of weight that can be taken out if you really wanted to be a competitive autoX car.

The turbo motor will bump you to XP. FP only allows the stock engine, no forced induction added on.
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Old 03-22-2009, 12:36 AM   #13
JSarv
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12.07@115.9mph-EJ205

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This is awesome! Finally a Subi guy running High compression and some serious boost!!!!!!!!!!!!!!!!!!

Honda guys swear by it - but rarely see a Subi running anything over 9-9.5 and much boost... I'd love to have 10-1 and run mid 20's...


-Jerod
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Old 03-22-2009, 01:12 AM   #14
subydude
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What's A Head Gasket?

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Quote:
Originally Posted by mxpunk View Post
nice setup but i must ask..if it weighs 2700 lbs why didnt you just start with a gd chassis and gut it?

2700 lbs is hella heavy for a gc unless its still full weight and has the roll cage..
The stock AWD 94 L weighed 2575. The swap adds about 200 lbs give or take 50 lbs depending on choices in parts. Strip 100 lbs out for average SM weight savings and then add in 60-80 lbs for the cage. He's right about where he's supposed to be. Like he said, he's underweight for using the 2.5 block, which isn't a bad thing. It means he can add balast where he wants to balance out the car

My SM RSTi weighs in at 2720 right now without a cage, but once I switch everything to being legal I'll be back up to almost 2800 lbs (my car has the light weight beams which are a big no no ).

Quote:
Originally Posted by speedyHAM View Post
2700 lbs is a little lighter than stock without a roll cage for a GC. With the roll cage 2700 is not too bad, but there is a lot of weight that can be taken out if you really wanted to be a competitive autoX car.

The turbo motor will bump you to XP. FP only allows the stock engine, no forced induction added on.
He's using the L which was lighter than the RS that everyone quotes. If he stays in SM there's a lot he can't take out in comparison to your XP build. None the less there is a LOT you can take out for SM. I'd guess a full bore SM build could pull 300-400 lbs out if the money is there. The more "local" builds would be pulling around the 200 mark out via hood/bumper, interior, brackets, lighter rotating mass mods.

Personally, I think he should use the offset bushing that whiteline makes. It uses the stock housing but offsets for more caster. Keeps you SM legal
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Old 03-22-2009, 01:22 AM   #15
mxpunk
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Hehe..now that I think about it, when I think of light GC bodied imprezas I thinkof topspeeds brighton and gst's L
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Old 03-22-2009, 01:22 AM   #16
subydude
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What's A Head Gasket?

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Personally, I think you're going to end up switching to a larger turbo with this setup to keep up with the longer more open courses (unless you run with miata clubs). The torque peak early is sweet on tight courses, but anywhere that you need to use the top end of 2nd is going to be tough with things falling off like that. I'd suggest taking a sampling of what your average corner exit RPM is. Since I have a 6-speed in my car we should be close to the same. On a "hairpin" autox turn I'm at 3,500 minimum on 255 street tires (we have a street mod street tire class in my region....it's cheaper than $1k a year for tires:P ). My powerband with an EJ207 RA-C and stock (vf30) turbo starts at 3,200 and doesn't drop below 200 ft/lbs of torque till just under 7k rpm and at redline (8250) it's at 170ish. I'm really trying to decide what turbo to pick for autox that gives a power band that STARTS at 3,500 but lasts much longer.

All of that to say, find what your corner exit RPM is and then pick a turbo that has full spool from that point and the best torque at redline. That way you'll never be out of the powerband and you'll have the power up top to keep you going. With that extra compression (which I am EXTREMELY excited to see working well in a subaru) you "should" be able to spool something like a TD06 20g and still be in the sweet spot on corner exit...especially if you're using A6's. If I'm at 3.5k on streets you should be at 3700-3800....and that's GT30 range of spool on a 2.5 with stock compression. You sir, have an awesome setup!!!
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Old 03-22-2009, 01:34 AM   #17
subydude
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Quote:
Originally Posted by mxpunk View Post
Hehe..now that I think about it, when I think of light GC bodied imprezas I thinkof topspeeds brighton and gst's L
If I had it to do over again I would have picked an L Most of us pick the RS because we liked it to begin with or started in an ST class then later decided to swap. At that point most people find out they could have had a lighter car for cheaper Luckily the weight difference is mostly made up of non-essentials that can be taken out.
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Old 03-22-2009, 04:38 AM   #18
bouchon
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Good job guys. I am glad that it all came out great.
Now I am gonna have to try the beast. Cumberland will be fun for sure.
Cobra guys, get ready for a fight!!!!
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Old 03-22-2009, 09:09 AM   #19
BugBomb
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There's still a lot of weight in this L that can be removed. We've been trying to get the difficult stuff out of the way first. We may have chosen a GD chassis from the start if money wasn't as big of an issue. This project car ultimately started because we obtained a rolling chassis for $300 and a wrecked WRX for $1,300 (back in 2003). It still desperately needs a paint job.

Also, the regular clubs we run with are either 50MPH (easy 2nd gear without getting too high in our powerband) or 70+MPH (way too high for 2nd gear). On the faster courses we have no choice but to use 3rd gear so our powerband works pretty well at these events.

Quote:
Originally Posted by speedyHAM View Post
The turbo motor will bump you to XP. FP only allows the stock engine, no forced induction added on.
Thanks for clearing that up. I was hoping that since the STi was legal for FP that we might be, but I guess not.
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Old 03-22-2009, 01:43 PM   #20
xXFiendXx
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why does the graph state lotus elise on top of it?
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Old 03-22-2009, 03:00 PM   #21
KONKILR
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the Suxass racing mobile!

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That was what was on the dyno last and we didn't rename it.

jake
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Old 03-22-2009, 08:49 PM   #22
swiftwrx1
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very nice!
<-----This guy loves e85 also!
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Old 03-23-2009, 01:12 AM   #23
speedyHAM
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Quote:
Originally Posted by subydude View Post
The stock AWD 94 L weighed 2575.
I have a hard time believing that since my '96L (basically the same car) was 2735 when it was stock. All the specs I can find state that the front wheel drive model was 2550 lbs, and the AWD adds a lot of weight.
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Old 03-23-2009, 07:34 AM   #24
Paul
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stock awd 94 l coupe should weigh 2500.....hes the list i go off of
Official Suabru Curb Weight
Impreza

93 Std. FWD sdn M 2350
93 L AWD sdn M 2590
93 LS FWD sdn M 2520
93 LS AWD sdn M 2670
93 L FWD wgn M 2490
93 L AWD wgn M 2670
93 LS FWD wgn M 2610
93 LS AWD wgn M 2760

94 Std. FWD sdn M 2325
94 L FWD sdn M 2325
94 L AWD sdn M 2500
94 LS AWD sdn A 2805
94 L FWD wgn M 2405
94 L AWD wgn M 2580
94 LS AWD wgn A 2895

95 BASE FWD cpe M 2400
95 BASE AWD cpe M 2555
95 BASE FWD sdn M 2420
95 L FWD cpe M 2450
95 L FWD cpe A 2565
95 L FWD sdn M 2475
95 L FWD sdn A
95 L AWD cpe M 2605
95 L AWD cpe A 2690
95 L AWD sdn M 2620
95 L AWD wgn 2750
95 L Special Ed. FWD sdn M 2590
95 L Special Ed. AWD sdn M 2620
95 L Special Ed. AWD wgn 2750
95 LX AWD cpe A 2840
95 LX AWD sdn A 2835
95 LX AWD wgn A 2925
95 OBS Special Ed. wgn 2690

96 L FWD cpe A (1.8) 2565
96 L FWD sdn A (1.8) 2590
96 Brighton cpe M 2600
96 L cpe M 2715
96 L cpe A 2790
96 LX cpe A 2805
96 L sdn M (1.8) 2560 (Canada only)
96 L sdn M 2685
96 L sdn A 2765
96 LX sdn A 2835
96 L wgn M (1.8) 2650 (Canada only)
96 L wgn M 2795
96 LX wgn M 2925
96 OBS M 2855
96 OBS A 2935

97 Brighton cpe M (1.8) 2600
97 Brighton cpe A (2.2) 2770
97 L cpe M 2720
97 L cpe A 2795
97 L sdn M 2690
97 L sdn A 2770
97 L wgn M 2795
97 L wgn A 2835
97 OBS M 2835
97 OBS A 2915

98 L cpe M 2720
98 L cpe A 2795
98 L sdn M 2690
98 L sdn A 2770
98 L wgn M 2795
98 L wgn A 2875
98 OBS M 2835
98 OBS A 2910
98 RS cpe M 2800
98 RS cpe A 2860

99 L cpe M 2730
99 L cpe A 2800
99 L sdn M 2735
99 L sdn A 2805
99 L wgn M 2835
99 L wgn A 2880
99 OBS M 2860
99 OBS A 2925
99 RS cpe M 2815
99 RS cpe A 2865
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Old 03-23-2009, 08:27 AM   #25
bugman1964
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I rode in this over the weekend. Absolutely amazing. One second your cruising along the next second trees are flying past you.
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