is the greddy stainless O2 extension worth the money?

Post by **turboex** » Tue Feb 18, 2003 6:34 pm

Does any one have a TRUST/greddy stainless O2 extension installed? Did you notice a diffrence? is it worth the money?

Post by **BuudWeizErr** » Tue Feb 18, 2003 6:34 pm

If you want to squeeze all the power out of the T2small that you can, sure. And if you intend to get an HKS GT25xx or some other turbo that bolts on later on. If not, don't waste the money, those things aren't cheap.

Post by **Dori Dori** » Tue Feb 18, 2003 6:34 pm

^what bud said. If you are planning on changing your turbo to another bolt-on, go for it. But if you're getting kit, it will come w/ a new dp extension.

Post by **Movingviolation240** » Tue Feb 18, 2003 6:34 pm

15-20rwhp gain, for under $200 it's well worth it IMHO

PaulOrlando, FL

Post by **Dori Dori** » Tue Feb 18, 2003 6:34 pm

Dyno?

Post by **Movingviolation240** » Tue Feb 18, 2003 6:34 pm

look around, I'm not gonna dig it up just to prove it.

Option Mag claims between 15-25hp depending on your mod level (this is taking into account a good downpipe and exhaust). Just porting out the stock one is going to give you up to 10hp (according to some DSM guys I'm freinds with)

PaulOrlando, FL

Post by **Dori Dori** » Tue Feb 18, 2003 6:34 pm

I didn't ask b/c I want you to 'prove it'...I just want to see where the gains were made.:rolleyes

Post by **Cyberkreig** » Tue Feb 18, 2003 6:34 pm

Gains would (probably) be way up top. Like most exhaust upgrades.

Post by **bp2ooo** » Tue Feb 18, 2003 6:34 pm

Wow, im interested now. Where have you seen these for sale?

Post by **I H8 UR DSM** » Tue Feb 18, 2003 6:34 pm

you wont get 15-20whp by 'just' installing that pipe.

JEsseRPI

Post by **bp2ooo** » Tue Feb 18, 2003 6:34 pm

jesse what would be a more accurate guess? 5 whp maybe at a higher boost. Still im going to try to get the most i can out of stock t25 because it will be a while before i can get a new turbo. It looks like that extension would be money well spent.

Post by **Dori Dori** » Tue Feb 18, 2003 6:34 pm

A 20hp increase isn't too hard to believe if you are running on stock boost/ecu. Reason is b/c (assuming this peice is less restrictive than stock) you will probably gain like 1 or 2 psi just like you do when adding an exhaust or front pipe to a turbo car. The peice itself, on the other hand, is probably only good for around 5-8whp IMHO.

Post by **I H8 UR DSM** » Tue Feb 18, 2003 6:34 pm

i have no doubt that any dyno can be minipulated to show any amount of HP gains the seller or advertiser or magazine wants, so i dont doubt there is 'proof' of it giving 20whp, but i dont see it happening in the real world...With a full setup of mods, ex mani, downpipe, extension, no cat, exhaust, of course your obtimizing the system, but i dont think bolting that on, or off, will result in over actual gains of over 12whp...I do think you could get up to 15...or who knows maybe 20, but i would go into expecting that much...

JesseRPI

Post by **DonDonati88** » Tue Feb 18, 2003 6:34 pm

ok so 200 bucks for 12whp that is awesome

Post by **Dori Dori** » Tue Feb 18, 2003 6:34 pm

Like I said, if you're not running a boost controller, you might see a rise in PSI..maybe 1-2, that's where most of the gains would come from...and 15-20hp is not entirely unrealistic with a 1.5psi rise.

Now say your car had all the basic bolt-ons (intake, frontpipe, test pipe, exhaust, FMIC, ect) with an EBC set to, saaay 14psi; I'd say you were lucky if you could squeeze out 8 additional whp...but that's just me.

The DSM guys port their stock O2 housings for similar effects. Why doesn't someone here w/ an SR20 and a dremel try that? Might be worth it.

Post by **Movingviolation240** » Tue Feb 18, 2003 6:34 pm

cuz even a ported stock housing is only about half that improvement. Havn't you guys been reading SCC and their project WRX? Just a slightly different flange on the O2 housing (from one aftermarket housing to another) gained like 6whp. I have no doubt that you can do 15hp at high boost. Look at the stock thing, take it appart, it sucks... bad. It's got those big lumps right in the exahust path, very rough finish, sharp bends to clear eveything, and the exhaust and wastegate flow are just 'dumping' into eachother which further restricts flow.

I did port the hell out of mine, but you can only port it a little bit before you start putting holes all the way through the stock manifold, then you have to weld up the holes and keep going. In the end it looked really good, and made a nice difference, but still not close to what I'm sure a 'real' pipe would do.

And FYI a Dremel will not cut it when trying to deal with this stuff, you'll need a die-grinder and high pressure air. Expect to spend a few hours on it.

PaulOrlando, FL

Post by **I H8 UR DSM** » Tue Feb 18, 2003 6:34 pm

Movingviolation240 wrote: Havn't you guys been reading SCC and their project WRX?

LOL, no thanks...and like i said, any Dyno chart in any publication can and is easily manipulated to show whatever gains they want to..and Even in SCC, no matter how technically honest you think they are, they still make their money via advertising....

I remember their VR4 buildup from the past, with the 25+whp claimed gains after removing the stock airbox too...:rolleyes

Dont believe everything you read...i dont think there is any real way to tell unless YOU do the dyno run yourself, with and without that pipe, on the same day, in the same enviornment, under the same circumstances to see what it does exactly on each setup....I just say be weary, i dont see how it can add 25whp, when unbolting your exhaust after the downpipe, and running open, wont even yeild that much...ya know?

JESSERPI

Post by **I H8 UR DSM** » Tue Feb 18, 2003 6:34 pm

BUT if anyone changed or upgraded a turbo, for 200bux, i think its definitly worth the money.

JESSERPI

Post by **DonDonati88** » Tue Feb 18, 2003 6:34 pm

yeah but how can you say that 8rwhp for 200 bux is not a good deal?

Post by **I H8 UR DSM** » Tue Feb 18, 2003 6:34 pm

HP doesnt work like that...there is no magical equation for how much HP should cost you XX amount of dollars...its an individuals decision to make that choice.

JESSERPI

Post by **Tai Mai Shu** » Tue Feb 18, 2003 6:34 pm

Now would you keep that if you went to a T28? Then I would feel its worth it. and yes, they can manupulate dynos to say what ever check out this linkhttp://www.tamparacing.com/php...=9398

86 Delorean Recent Mods: -Flux Capacitor -Mr. Fusion Next Mod: Folding wheels with jet engines in them Best 1/4 5.14@297mph

Post by **Dori Dori** » Tue Feb 18, 2003 6:34 pm

Movingviolation240, the pipe that they changed on the WRX is called an up-pipe. It's an extension of the manifold (not the downpipe). Also, it has a cat in it's stock pipe! That's why all those gains are made. It's in a completely different location and it serves a completely different purpose than this peice. Actually, their hp gains were kind of low...I've seen dynos of wrxs (which, keep in mind dyo at the 160's bone stock) in the mid 190's with just the uppipe and some silicone i/c hoses. The gains are a bonus though...it's mostly to drastically lower underhood temps and increase spool up time (imagine a cat in front of your turbo, yeah it sucked)...a hp gain is an added bonus.

And why are you talking about porting your manifold? This peice is on the exhaust side of the turbo and has nothing to do with the manifold. Am I missing something here? We are talking about the 02 housing (or downpipe extension) that goes one the exhaust side of the turbo, right?

Oh, and my friend with the DSM did port his with a dremel. He said it took forever and if he ever had to do it again, he'd buy an aftermarket peice.:\

Post by **Movingviolation240** » Tue Feb 18, 2003 6:34 pm

yea your missing somthing completly, I wasn't talking about the uppipe, I was talking about the downpipe. THIS MONTH's issue is what I was refering to, not the one 4 months ago when they installed the Stage Zero kit (that included the uppipe, pulley, Unichip, boostcontroller, plugs...) At the time they also installed a turbo back exhaust (which replace the O2 sensor housing). Then they went to a slightly better flowing O2 sensor housing and picked up 8 peak HP and about 15hp at 5200rpm's.

The guys who have done this in Option Auto have all picked up at least 8hp as well.

I'm not throwing around numbers trying to say "XXX mod will give you YYY HP" It's simply to show that there is quite a bit of HP to be gained here.

Paul

Post by **Dori Dori** » Tue Feb 18, 2003 6:34 pm

Ahhh, OK, I know what you are talking about now. You are talking about the different dp designs (eg bell mouth, seperated, ect). Now we are on the same page. Yeah, a seperated wastegate/exhaust is the best way to go. In aussie land, they have 02 housings that allow for the wastegate to vent atmospherically. Now that is something I'd like to get. Call me crazy, but I love seeing fireballs shoot out of wastegate vents...it's also good for hp. Cons...cops will chase you and environmentalists and neighbors won't like you!:evilhaha

Post by **Movingviolation240** » Tue Feb 18, 2003 6:34 pm

I had the wastegate on my CA open, sounds like sex on wheels when the thing opens up at WOT.

the Aussies call them screamer pipes for a reason. And FYI the greddy pipe is divided.

PaulOrlando, FL

is the greddy stainless O2 extension worth the money?

is the greddy stainless O2 extension worth the money?

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