Author Topic: Factory turbo improvement-suggestions (Read 19099 times)

Arabas · « **on:** October 04, 2010, 10:34:31 AM »

I have a stock turbo i bought from a guy at a nice price.
initially i bought it to have a spare just in case, since i m planning on keeping my GT for a long time.
now, i m thinking of taking it to a specialised turbo guy here in Greece and mod it to get some extra hp.

i have consulted a GT friend and we have some things in mind, but i thought you guys can give me some piece of advice as well.

any ideas of what the turbo guy could modify on our stock turbo (with low cost) to make it more efficient and produce more hp?

Kelu · « **Reply #1 on:** October 04, 2010, 10:50:19 AM »

Factory turbo is bottle necked by turbine housing as far as I know. So if he can do something with this than I might be interested.

Helios · « **Reply #2 on:** October 04, 2010, 10:52:39 AM »

You could see what difference changing the pitch, curvature, and number of blades on the wheels would produce. I don't think this would be a low cost option though.

SKY888 · « **Reply #3 on:** October 04, 2010, 11:03:12 AM »

Quote from: Arabas on October 04, 2010, 10:34:31 AM

I have a stock turbo i bought from a guy at a nice price.
initially i bought it to have a spare just in case, since i m planning on keeping my GT for a long time.
now, i m thinking of taking it to a specialised turbo guy here in Greece and mod it to get some extra hp.

i have consulted a GT friend and we have some things in mind, but i thought you guys can give me some piece of advice as well.

any ideas of what the turbo guy could modify on our stock turbo (with low cost) to make it more efficient and produce more hp?

Brian of BNR is currently working on a couple of kappa owners' k04 turbos, and will be plugging in gt28 components inside. I believe even the housing will be modified/machined inside.

He has been very successful with other turbos.

This is not just a "big wheel" upgrade.

I believe this is the real deal....

shabby · « **Reply #4 on:** October 04, 2010, 12:54:13 PM »

Yup get in touch with bnr if you want your turbo upgraded http://bnrsupercars.com/
For $1100 he'll stuff gt2860rs guts in it, for $1300 he'll stuff gt2871 parts in it, these are complete chra's(compressor wheel/center section/turbine wheel) not just wheel upgrades.
Some pics of an upgraded k04 here http://www.cobaltss.net/forums/5266671-post82.html

SKY888 · « **Reply #5 on:** October 04, 2010, 02:00:04 PM »

Yeah, I believe it goes from stage 1 (2860)....stage 2 (2871) and stage 3 (2876? or 3071?) ....I forgot what the stage 3 really is

shabby · « **Reply #6 on:** October 04, 2010, 02:06:50 PM »

If i remember right its...
Stage 1 - 2860 with the stock compressor cover, turbo looks completely stock
Stage 2 - 2860 with a higher flowing compressor cover + higher pressure actuator
Stage 3 - 2871 with a higher flowing compressor cover + higher pressure actuator

Kagem · « **Reply #7 on:** October 04, 2010, 02:12:03 PM »

Interesting indeed! Anyone knows how many more hp gains from each stage compared to a stock turbo?

Kelu · « **Reply #8 on:** October 04, 2010, 03:12:46 PM »

Nobody knows because no k04 for LNF is done yet

SKY888 · « **Reply #9 on:** October 04, 2010, 03:17:50 PM »

Quote from: shabby on October 04, 2010, 02:06:50 PM

If i remember right its...
Stage 1 - 2860 with the stock compressor cover, turbo looks completely stock
Stage 2 - 2860 with a higher flowing compressor cover + higher pressure actuator
Stage 3 - 2871 with a higher flowing compressor cover + higher pressure actuator

shabster, I think you are right. Brian told me 3 months ago, while we were on the phone, since I sent him one of my turbo that a member bought from me. I wasn't really paying attention, since I'm not gonna get one .

SKY888 · « **Reply #10 on:** October 04, 2010, 03:20:14 PM »

Quote from: Kagem on October 04, 2010, 02:12:03 PM

Interesting indeed! Anyone knows how many more hp gains from each stage compared to a stock turbo?

basically, if you get the stage 1 (GT2860)....you'll get a similar HP that a regular GT2860 garrett turbo will offer, from what BNR told me.

go to the garrett website to see the hp that 2860 and 2871 will offer....

shabby · « **Reply #11 on:** October 04, 2010, 09:43:05 PM »

More info http://www.cobaltss.net/forums/5274164-post136.html

1LILNDN · « **Reply #12 on:** October 04, 2010, 10:44:13 PM »

Does BNR port and Polish the Air Passages for smoother air Flow? or isn't that an issue of concern

Arabas · « **Reply #13 on:** October 05, 2010, 07:24:03 AM »

i contacted the turbo guy and he said that at a reasonable price, the only thing he could do is (in a few words) to replace the wheel with a bigger one, similar to Audi S3 K04 turbo.
he said it will be able to handle up to 400 hp and it will look stock from outside. he estimates about 370-380 hp for the GT

the good thing is the price. 300 euros (special price because of a common friend), meaning about $400.
i think in US this upgrade is something like 1000$.

in the next few days, i ll decide if i will go on with it

Kelu · « **Reply #14 on:** October 05, 2010, 08:17:50 AM »

Go with it, I really wanna see it working. Dynos before and after is a must.

It is done yet?

Arabas · « **Reply #15 on:** October 05, 2010, 08:27:21 AM »

are we there yet??? are we there yet??

most probably i will go on with it. the only problem seems to be that i will need to spend 2-3 working days (removing turbo and visit to the turbo guy-replacing the turbo etc) which is not so easy at this moment...

as far as dynos, i still have done no dyno, consider Kagem's dyno as my dyno, coz we are almost the same.
when i do it, i will test on the road against Kagem and other friends that i know how their cars perform.

SKY888 · « **Reply #16 on:** October 05, 2010, 08:38:41 AM »

Arabas, are you just upgrading the wheel into a bigger one? For $400, that's not bad at all. Because usually, they cost $800 and higher.
That's cheap indeed.

Highest I've seen with those big wheel upgrade is around 320whp....

But the BNR turbo upgrade, is not just a wheel upgrade. And will cost more than $1000. Huge potential in whp increase though.....

anyways, good luck with your big wheel upgrade. Tuning will be the key for that!

Arabas · « **Reply #17 on:** October 05, 2010, 08:42:52 AM »

i agree Sky888, the price is good, that s why i am thinking about it seriously.
i have already emailed Vince to see if he can make the tune for this upgrade.

Critterman · « **Reply #18 on:** October 05, 2010, 02:36:05 PM »

GIT ER DONE!

Kagem · « **Reply #19 on:** October 05, 2010, 04:54:47 PM »

Yumi yumi, i smell horses, many horses! Let's hope this works out and you find a tune for it, then Mr Arabas it will be my pleasure to see you disappear when next to me....

shabby · « **Reply #20 on:** October 05, 2010, 05:50:25 PM »

Quote from: 1 LIL NDN on October 04, 2010, 10:44:13 PM

Does BNR port and Polish the Air Passages for smoother air Flow? or isn't that an issue of concern

Not needed.

Quote from: Arabas on October 05, 2010, 07:24:03 AM

the good thing is the price. 300 euros (special price because of a common friend), meaning about $400.
i think in US this upgrade is something like 1000$.

That's usually how much wheel swaps cost, no idea why we're being gouged so much here with double the price. A compressor wheel and machining doesn't cost $1000.

LatinVenom · « **Reply #21 on:** October 05, 2010, 06:08:44 PM »

However the compressor wheel alone will not net 320 WHP probably more like 245 WHP, then a good tune and it will get you around the 300WHP.
With 300WHP you are looking at 360 BHP or crank horse power.

Dave@DDMworks · « **Reply #22 on:** January 29, 2011, 09:07:24 PM »

Thought I would update this thread, we have been running the BNR stage 3 here for about 2 months now and here the latest dyno run from it:

That is on 93 octane, no meth/water, intercooler, high flow cat, exhaust and an intake. Most likely with an off the shelf tune most are going to be int he 355-360whp range SAE. I will update more next week!

snaponbob · « **Reply #23 on:** January 29, 2011, 09:12:45 PM »

Who needs viagra when you have THAT ?!?!?!?!?

1LILNDN · « **Reply #24 on:** January 29, 2011, 10:06:52 PM »

Quote from: snaponbob on January 29, 2011, 09:12:45 PM

Who needs viagra when you have THAT ?!?!?!?!?

SOB ; So what your saying with that you get the Rise at" No Extra Cost " ( Then What )

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Author Topic: Factory turbo improvement-suggestions (Read 19099 times)