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Old 07-10-2001, 10:00 AM   #1
Scoober01
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Join Date: Jan 2001
Location: Englewood, CO, USA
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2001 Impreza 2.5 RS
Blue Ridge Pearl-Red acc

Default What is needed to support the mods...

I was wondering if I might get some suggestions here.
I've got a craveing for more power, I've done some significant NA upgrades and I was trying to think of what adjustments or other small mods could be done to better compliment whats on there now. I know I need to get new plugs. I've been playing with the idea of raiseing the fuel pressure or possibly advanceing the timing. Someone metioned this would help, how and why, pros cons? I think I'm getting defi gauges soon, so that should help with tuneing the fuel pressure for EGTs. What ells can be done beyond this though. I'm not looking to get new cams or heads just yet. Just small things to help the car run just a little bit better.
Any suggestions are welcome. Maybe a S-AFC? Anyone have any long term JCS torque chip reviews?
Thanks,
Ryan D.

Mods
Short Throw shifter With STI Bushings
Magnecor Comp. Wires
Ganz-Flow Cold Air Intake
K&N Filter Charger
Borla Headers
Borla Mid-Pipe and Borla Exhaust
Stock Cats
CarbonFiber shift handle
CarbonFiber Sport Peddles

P.S.
O and with my mods so far is any tuning or other changes required rather than just wanted.
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Last edited by Scoober01; 07-10-2001 at 10:10 AM.
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Old 07-10-2001, 11:33 AM   #2
HamFist
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BRP

Default

I wanna try my intake on your car, Ryan. I'll be going to Bandi tomorrow. Let me know what's up. G
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Old 07-10-2001, 02:05 PM   #3
Peaty
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Azurite Blue Pearl

Default

Just an FYI the STi bushings for the shifter are exactly the same as the OEM ones:

http://www.scoobymods.com/mods/impreza/kartboy-sti.php



Peaty
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Old 07-10-2001, 02:21 PM   #4
Scoober01
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Blue Ridge Pearl-Red acc

Default Ummm

Well peaty, just a F.Y.I. I've held both in my hand. The STI bushing is alot stiffer than the stock bushings. I'm not calling Kartboy a lier, I'm sure he just wants to sell his bushings. His look very nice and rock hard.
Peaty have you ever had both in your hands at the same time and try to flex them. You know the center hole, on the stock one if you were to swash it down as hard as you could, you could get the hole to close. On the STI bushing you can not do that. The outside if soft but the inside is much much stiffer than stock.
Check out another post I've been in.
Ryan D.

TREAD
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Old 07-10-2001, 02:41 PM   #5
Scoober01
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Default word

P.M.ed ya burninrubber.

Can we get back on the subject. I'm still looking for suggestion.
Ryan D.

(edited) just cuz i was bored.
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Old 07-10-2001, 02:51 PM   #6
Peaty
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Actually I took those pics and did have both in my hand. The stock RS bushings and the STi ones were both about a year old. Maybe they fatague with time. Yes the STi ones are harder but my my estimation only a small amount. Also, the STi and RS bushings have air gaps in them that will also make them feel softer shifting. I've installed and felt both the Cusco and KB bushings and there is no comparison in hardness. The KB and Cusco may as well be bricks compared to the RS and STi bushings. My wife is a packaging engineer and possibly I could have the Duromoter checked between the STi, RS, Cusco and KB. On a scale of 1-10 the hardness of the RS being 1 the STi may be a 2 but the KB a 9 and Cusco a 10. I've also driven the STi, RS, Cusco and KB bushings installed. Also stock sti and KB shifters For all intents and purposes the STi felt similar to the RS and The KB and Cusco both feel more solid. The drawback to the KB and Cusco is that there is more NVH that comes from the driveline and some don't like the notchyness that comes with them.

Myself I didn't get any abnormal vibrations on any of the installs I felt. Only a few times I've come across that when the installer put in a new shifter lever and overtightened the pass through bolt at the pivot point. Too tight and the shifter fork arm will contact the lever rather than the bushing in the shifter and transmit all the vibration rather than let the small bushing absorbb most of it. It only needs to be snug like 8-10 ft/lbs.
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Old 07-10-2001, 03:03 PM   #7
Scoober01
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Blue Ridge Pearl-Red acc

Default Very nicely put peaty.

You may very well be right. I wish you would have said all that before.
Quote:
Just an FYI the STi bushings for the shifter are exactly the same as the OEM ones:
IMO
1-soft 10-hard as H#LL
Stock-1
STI-4.5
Cusco-9.5
KB-10
I just didn't like all the NVH. It was mainly on the HW.
The STI fit my needs and wants.
Now that we have all that out of the way anyone have any suggestions to help tune my car correctly for the mods I have listed?
Ryan D.
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Old 07-10-2001, 04:36 PM   #8
Peaty
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Arrow

OK they *feel* exactly the same to me.

Anyway I know you want to change your plugs. You should really do that asap. I know in the 99 and 2000, not sure about others, have Champion as stock plugs. Myself I really don't like the idea of those in my car. I went with the STD NGK copper plugs rather than the plats. From what I heard the copper gives better performance and the plats have better long term duriability. I just change my plugs every year is all. In the end it's actually cheaper to go with the copper ones. I put the Bosch +4's in my wife's 2.5 Legacy and didn't notice much of a differnce like they claim.

Also, if you haven't done it yet put in some vent spacers to let out the heat.

http://www.scoobymods.com/mods/impreza/ventspacers.php

and open up the hood scoop plate to let in the cool air.

http://www.scoobymods.com/mods/impreza/hoodscoop.php

It gets hot under there.
http://www.scoobymods.com/mods/impreza/thermal.php

Opening up the bumper vent will get more air to the intake too:

http://www.scoobymods.com/mods/impreza/bumpervents.php
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Old 07-10-2001, 05:03 PM   #9
monovich
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Question

Do you know approx. how many HP you are running with the mods you currently have installed?

-Steve
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Old 07-11-2001, 01:46 AM   #10
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Default

You have a good list of mods there.

My recs are to get a Torque Chip II and a lightweight pulley or under drive pulley next, then a COBB cam later. However, STI motor mounts and Tranny mounts will help put power to the ground too. If you don't wanna do a set of cams, at least consider a 12 lb flywheel.

Shameless plug, I can sell you all or any of those items above, if you decide to stay NA vs turbo

Larry
www.ImprezaRS.com
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Old 07-11-2001, 10:06 AM   #11
Scoober01
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Blue Ridge Pearl-Red acc

Default Well...

Well my long term goal is a turbo, long term being about 2-3 years down the road. To keep me happy untill then I'm first doing a nice NA/NOS build. I've done most of the small bolt on stuff ie; exhaust, intake, wires. Right now I'm working on getting some gauges and tuneing tools. After the gauges, EGT, OIL-T, bottle PSI, I'll have my hands on either a NOS 50-75s or a venom kit of the same power. After the NOS I plan on upgrading the internals of the engine ie; cams, heads, rods, pistons, trans, mounts etc etc...after that maybe a larger shot. Then comes the O mighty turbo and boost gauge.

Peaty: Thanks for the suggestions.
Plugs...This weekend
vent spacers...Putting them in tonight.
Hood Scoop...Spacers also, tonight.
I looked a the graph of temps, looks like fender intake is the coolest,,,Ganz flow.
As for the bumper vent. I've been thinking about it. I'm not sure if I want to remove the vents and just leave the ring or do some wire mesh. I know just taking out the vents and leaveing the ring would be better and I don't really like the whole wire mesh thing. So I think I'll just break down and saw out the vents and paint it black, my only real concern is water or just stuff getting in the intake. I've also been thinking about covering my Ganzflow with some type of insulator to keep the heat off it but the only ones I've seen fall off within a week.
Great suggestions peaty thanx.
Ryan D.

Last edited by Scoober01; 07-11-2001 at 10:13 AM.
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Old 07-11-2001, 12:22 PM   #12
bratmantlz
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Default

booga boooga!
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Old 07-11-2001, 01:34 PM   #13
Peaty
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Azurite Blue Pearl

Default

Larry has a good idea about the underdrive pulley too, I forgot about that one I've had it so long. My concern when I put it in was that my AC would suffer as it gets really hot here in KS. I worried for nothing because it works fine even in 110F weather. I think if you eventually get a turbo you'll have to go back to the stock pulley though. Still they are easy to sell.
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Old 07-12-2001, 02:07 AM   #14
ImprezaRS dot com
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RE: the under drive pulley. I also carry lightweight normal sized pulleys. These use the stock belts and the AC runs fine.

Per Grassroots Motorsports Magazine, for every 1 lb lost in pulley weight = 2.7 hp at the crank. These pulleys are 4lbs lighter! I expect to have more next week.

Larry
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Old 07-12-2001, 06:05 PM   #15
Rich L
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Default

Scoober01,

rid yourself of those stock cats. Its the most restrictive part of your exhuast and limits the other mods.

IMHO: Save the pulley money for a bigger 2.25"-2.5" cat. (it offers better bang for the buck)
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Old 07-13-2001, 03:44 PM   #16
ImprezaRS dot com
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Yeah - cats. Search the links for Random Technology and buy a couple of high flow cats from them ($59.95 each), and then bash up your old ones so a muffler shop will install the new ones legally

Larry
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