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Old 02-22-2007, 05:00 PM   #1
MikeCG
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Default SVX build take 2........

Well, Iv'e started digging back into the SVX. I've decided 9lbs boost isnt enough. I need to break the 300whp mark. This means a complete build up. The pistons are known to be the weak point. This is the list so far. Keep in mind that there isnt much in the way of support for the SVX and everything is custom.


Eagle Forged rods: $580 for 6
Pistons : $1000 for 6
Cams/Springs/Valves: $????
Copper head gasket: $????
Subaru Gasket kit: $125
Block prep: $????
Head prep: $????
Assembled/install: $????
NO2: $????
Pulley kit for S/C: $????
Tune: $????

I'll update the cost as it goes.
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Old 02-22-2007, 05:04 PM   #2
reddevil
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I thought the pistons were the same as the 2.2 liter? just six of them? If so, just swap in ej22t pistons.... They are cheap, and regularily make 300 whp on just 4....
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Old 02-23-2007, 01:24 AM   #3
IllNastyImpreza
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you know.....If I ever build up another engine. It will DEFINATLY be an h6.... prolly an SVX one too
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Old 02-23-2007, 08:37 AM   #4
MikeCG
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Quote:
Originally Posted by reddevil View Post
I thought the pistons were the same as the 2.2 liter? just six of them? If so, just swap in ej22t pistons.... They are cheap, and regularily make 300 whp on just 4....
The pistons we're having made are pretty much the same as the factory ones. Only they will be forged and have deeper valve indents to allow for the longer valves we'll be using with the custom reground cams.
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Old 02-23-2007, 11:02 AM   #5
MY99 2.5GT
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Nitrous is N20 not N02 just to let you know.

That sound really cool and all but couldn't you do an EZ30r swap for about the same money if not even less?
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Old 02-23-2007, 04:47 PM   #6
MikeCG
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Maybe, could probubly do an STi swop, too. I already have the R180 and 6-speed in the car. We all know it's possible to make big power numbers with the STi engine, but I think the EG33 is part of makes the car what it is. I could have gone with cheaper pistons, also, but I rather pay a little extra for the quality. I could do alot of things to make the car go quick, but I dont want to take away from what makes the car what it is. My father even went as far as to ask why I dont just cram a LS2 crate motor in it. I could easily pick up a 500hp LS2 for 8 or 9 grand, and have less to worry about with it.

I'm by no means saying doing a swap isnt the right thing to do, or the easy way out (hell some times it's the harder way). It's just not the route I want to take.
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Old 02-23-2007, 06:42 PM   #7
IllNastyImpreza
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^ I hear ya.... more power to u !

I wana see some big numbers out of that ol 6 cylinder !
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Old 02-24-2007, 12:16 AM   #8
MY99 2.5GT
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Thats cool but the SVX didn't come with forged pistons, turbos, or 6-speeds

I'd say your pretty far from what makes an SVX an SVX.

Should be a really sweet build nonetheless. Just wanted to see if you had considered other options.

Does your SVX currently have a turbocharger setup? If so was it the old Forced Air Technologies kit? Ive always wondered how that would turn out.

Brad
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Old 02-24-2007, 08:56 AM   #9
Ma7kBrown
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1 part nitrogen two parts oyygen = nitous oxide or as it's better known NO2, With two parts Nitrogen you have the start of a great explosive.
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Old 02-24-2007, 10:00 AM   #10
MY99 2.5GT
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http://en.wikipedia.org/wiki/Nitrous_oxide

I thought "great explosion" is what we wanted.

"1 part nitrogen two parts oyygen = nitous oxide or as it's better known NO2"

You just explained the layout of Nitrogen Dioxide.

Brad
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Old 02-24-2007, 10:22 AM   #11
MY99 2.5GT
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This build is pretty interesting. I noticed you said it was "Take 2". What did you do to build it the first time?

A few years back I saw a drag race rail car with a fully built NA 3.3 motor making close to 400 hp. It was pretty crazy to see that thing competing with tricked out v8's. I believe it ran in the high 8's-9's.
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Old 02-26-2007, 12:24 PM   #12
MikeCG
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I guess it's not really a take 2 per say. Version 1 is a stock valve train and bottom end. I have a custom made Supercharger kit with 720cc injectors, 300ZX MAF, and custom fuel and timing maps in the stock ECU.

I'm building up a spare engine to turn up the boost, add in a better CAM profile, and a little shot of Nitrous. I think I'll start out with a 50 or 75 shot and see how it works. I'm wanting to dip into the high 12's and still be street drivable. With the current setup I have a best of 14.088 without taking anything out for weight (not even the spare).
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Old 02-26-2007, 01:47 PM   #13
IllNastyImpreza
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Quote:
Originally Posted by MikeCG View Post
...I have a custom made Supercharger kit with 720cc injectors, 300ZX MAF, and custom fuel and timing maps in the stock ECU.

...

did the 300ZX MAF take any modding to fit? any wiring?

I'm pretty sure I'm gona MAX out my stock MAF on my car...and am looking at other MAFS that can take 35+ lbs of boost...
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Old 02-26-2007, 04:58 PM   #14
MY99 2.5GT
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Was your 14.088 with the stock Auto trans or with the STI 6 Speed? If it is with the auto tranny I would bet you would pick up at least a half second just by switching to the 6 speed. Its still pretty good as it stands for an SVX.
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Old 02-27-2007, 08:12 AM   #15
MikeCG
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Quote:
Originally Posted by IllNastyImpreza View Post
did the 300ZX MAF take any modding to fit? any wiring?

I'm pretty sure I'm gona MAX out my stock MAF on my car...and am looking at other MAFS that can take 35+ lbs of boost...
The subaru connector casing needs to be replaced with a nissan one. It's not a big deal, you just slide the individual pins out of the connector casing and they slide right into the nissan one. You'll need to figure out the wiring though, the pin order is a little different I believe. You'll also need tuning to use it. The nissan MAF puts out different voltage levels then the subies.
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Old 02-27-2007, 08:18 AM   #16
MikeCG
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Quote:
Originally Posted by MY99 2.5GT View Post
Was your 14.088 with the stock Auto trans or with the STI 6 Speed? If it is with the auto tranny I would bet you would pick up at least a half second just by switching to the 6 speed. Its still pretty good as it stands for an SVX.
That was with the 6-speed. I'd probubly do a little better with an auto to be honest. The gear ratio on the 6-speed is way to close for a supercharged setup. It is designed to keep the rpms up where the turbo is spooled up. I've got more grunt in the low end. I spend most of my time down the 1/4 mile shifting gears. Having to shift into 5th at the far end is kind of insane. I'm considering seeing if anyone with an '06 or '07 WRX wants to trade a JDM 6-speed for there 5-speed. Either that or see what it would take to get front and rear diffs with a better ratio.
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Old 02-27-2007, 12:50 PM   #17
MY99 2.5GT
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Ive got a 5 spd from my 91 Legacy turbo that has the matching 3.90 viscous rear lsd. Infact Ive got the whole car if you want it. I'd love to trade it for a full 6 speed setup.

Brad
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Old 02-27-2007, 12:52 PM   #18
MY99 2.5GT
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I was told that the Legacy turbo back in the early 90's has cryo treated gears and the WRX's don't. I don't have a post or hard data to verify this but if its true the turbo Legacy 5spd should be able to handle more power and abuse then the WRX 5spd.

Brad
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Old 02-27-2007, 01:31 PM   #19
IllNastyImpreza
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^ I'm pretty sure they where "shot peened" ...not cryotreated
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Old 03-18-2007, 06:15 PM   #20
TomsSVX5mt
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glad to hear you are sturring the pot Mike. I have at least 2 sets of cams to send out to other Mike tomorrow for my top end parts... Do you know when we are getting our pistons and rods yet?? I also still have to pick up bearings for my motor....

tom
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Old 03-18-2007, 07:12 PM   #21
IllNastyImpreza
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any updates?
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Old 03-18-2007, 10:02 PM   #22
TomsSVX5mt
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not yet... it'll be a few more weeks to get our new cams ground and order some custom valves

tom
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