gmtech16450yz

Hey I just wanted to let everyone know Werks Performance is building and installing EFR kits, mostly on Kappa's but they've done Cobalt's too. I've had their EFR 6758, their custom built tube manifold and cat converter downpipe on my car for about 6 months now. The kit goes together pretty easily, it came with coolant and oil hoses too. I made my own intake setup (actually a modified K&N Typhoon), and the DDM charge tube I had just had to be slightly modified to match up to the EFR turbo outlet.

They're calling it a "raw" kit because I don't believe they have ALL the parts you would need for a total bolt on solution, I could be wrong though. I know Dave has a bunch of cars in his shop right now that he's putting EFR's on, so I know HE can do the whole install. This isn't a turbo only solution either, you would need a manifold and downpipe to match up with the EFR. The ones Werks sells works excellent on the Kappa's, clearances are perfect all the way around.

Everybody loves dyno sheets, so I didn't want to post anything on here about it without having the ever sacred "numbers" to show. This dyno run was done with pretty much my street tune, this is NOT a dyno tune. Meaning, it is not optimized for high dyno numbers. If you look a the dips around 7k, that's because the street tune fuel mixtures aren't perfect on the dyno. I didn't feel like wasting time tuning on the dyno, I just wanted some rough numbers.

The car runs awesome, totally smooth building power and an idle you can't even feel, even without the balance shafts. Mileage is pretty darn good for a 500hp motor, around 25mpg pretty consistently, and that's on E47.

Just figured I'd let you guys know about the other option out there. This isn't a direct competition to ZZP's approach, theirs will be a turbo only bolt on. This is a more involved setup, which fit what I wanted to do to MY car. I'm thrilled with how it turned out. Thanks Dave at Werks Performance!







Oh, btw, this isn't my first post on here, I've posted on here a bunch. My username went to "guest" and I couldn't start a new thread. I just made a new account with the same name (weird that I could do that?) and now I can post. ???

Boosted4

Looks pretty bad ass. Just a little too involved with all the parts and customization for my tastes.

bogalusahondakiller

Treadstone also has efr setups... Hopefully they will be this clean of a setup...

AcesNEights

iTrader: (4)

I thought the EFR 6758 wasn't supposed to lose power like that after 6500 rpm?

jb09ss

It's still a small turbo, so the drop is normal. But it has a good 100lb*ft advantage over a tuned stock turbo setup at 6500 rpm.

AcesNEights

iTrader: (4)

Well I dynoed 390tq and Chase dynoed 400tq. So its only got 53 ft-lb's more then our stock turbo's...

Chase0224

Truth^ doesnt look much better then the stocker. If im upgrading i better be getting some serious power for the work it takes, or the money. ZZP efr still seems to be the way to go when its released.

jb09ss

You are only looking at peak numbers. Check your torque @ 6500 rpm, I bet it is at about 250 lb*ft vs 350 for this efr setup. Huge difference.


edit : stock turbo e47 dyno, taken from the 2011 dyno thread. Not much over 250 torque @ 6500...

edit 2 : The spool of that efr looks excellent, even a tiny bit quicker than the stock turbo.

Supercharged Guy

iTrader: (1)

I'm sure there's still room in the tune to make more power, nice numbers/build BTW

AcesNEights

iTrader: (4)

Very true, I didn't even think of that. Its a nice ass setup, I just dont think its worth the coin to get it.

094doorSS/TC

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It's alot of coin for half of a turbo kit.

Wangspeed

iTrader: (2)

Smaller turbos spike earlier, and when tuned to do so for stupid peak numbers, produces a large spike in low RPM torque. Bigger turbos tend not to spool as fast, and so they tend to not have the big spike down low. If you look at the formula for horsepower, the reason should be obvious.

Looking at peak torque numbers for small v large turbo setups is completely useless.

BYT*SS*TURBO

iTrader: (6)

Its a really good similar to stock upgrade but with better top end. It will hold power better up top then the stocker but perform just like it in every other way when driving. The spool up was almost identical.

That's on E Blend too right John?

raver0789

LOL, you guys had to use my stock turbo dyno to compare. I still think the efr is the way to go. By the time that 5557 spools I have a 2 car lead. The 10whp difference up top isn't going to make a difference. I still think this efr is not going to get you more than 420whp without using e or meth, it is going to knock up top.

peachpuff

Another thing to take into consideration is that the rwd kappa platform always outputs less power than the fwd cobalt, you'll never see 350rwhp on a stock turbo in a solstice, ~300rwhp on pump gas is pretty much the max you'll get. With that identical turbo on a cobalt it would probably put down 46-470whp to the ground.

vahdyx

iTrader: (7)

Nice setup, but I agree with a guy up there. It's too modded for my tastes, but by all means, I respect it.

SSlobalt

I think it looks awesome..............................so there. All that polished aluminum gives me wood.

Fastgti69

Nice job man for having ***** to put out great info for us. I love the fact you got a dyno too, its great. The kit looks good, but not into the need to get some parts customized stuff. Graph looks great, lots of area under the curve and this turbo will **** on the stock k04... It has same spool time with almost 100 whp more.That thing just rips!

gmtech16450yz

Hi guys, sorry it took awhile to get back to this thread, we've been on vacation and before that I started on a big house remodel project!

Ok so the first thing I want to make clear is like I said, this is NOT a dyno tune. Meaning it's probably 90-95% of what the numbers would be if I spent an hour or so working the tune on the dyno. Boost was only 24-26psi above 5k, that's why the curve drops. If I had tweaked the boost to hold longer, it would most definitely put out a lot more top end power and torque. All I did was raised boost at the first hit, around 3700rpm, that's the only difference between the tune I did the dyno on and my street tune. I tune it for the street with an almost perfectly flat boost line from 3500 to 7k or so, and it's only between 24-26psi. This turbo will peg 30psi, I just choose not to run it that way, even with my built motor. Peak numbers mean very little, I want smooth, wide power that maintains traction. That's how I tuned my car. If I wanted high peak numbers, I'd tune it VERY differently.

The other thing that was totally not optimized was fueling. I don't have the ZZP larger fuel lobe cam, so I would have had to change my meth nozzle to get enough fuel to max out the dyno tune. I didn't feel like messing around with that so I just let the fueling be, even though it wasn't perfect for the dyno. It IS perfect for the street, and that's all that matters to me.

As far as comparing this turbo to stock and others, like some have said, it spools as fast or faster than stock, but just keeps building to 7k at least. The stock turbo starts dropping fast above 4500-5000rpm. At 7k its in full hairdryer mode. Oh, btw, intake air temps are always hella low during a pull, this turbo is WAY cooler at 30psi than the stock K04 is at 20psi. Remember, it's about the volume of air, not the pressure. Oh, btw, I also have the Werks Phenolic Spacers on the intake and throttle body...

The Home of WERKSracing products!

Lemme tell you guys, these things are amazing! Go for a nice, hard drive in your car, stop and open the hood. Try to put your hand on the intake manifold, chances are it will be so how you can barely touch it. I can drive the crap out of my car on a 90* day, stop and open the hood and be able to lay my hand on the intake! It will feel warm, but not hot. If I reach down and feel the throttle body, it almost feels cold to the touch! Those spacers WORK! (No, I never did any before or after actual temp readings or testing.)

Can't remember any other questions, I'll check back here later. Thanks for the nice comments guys, I know what I did to my car isn't for everyone of course, but it's what I wanted to achieve. I can't have a piece of aluminum in my hands without polishing it! I love the look of polished aluminum.

gmtech16450yz

Yeah Nick, that's on E47. With the boost flat like I said my street tune is, rail pressure holds ok through the whole rpm range. Jeb has the ZZP larger pump lobe cam and he's holding pressure perfectly. If I had that I would have run this turbo full bore for this dyno, I know I'd have problems though without more fuel. I was actually considering having Jeb try full E85 to see if his power level could run it, but I actually think E47 is a better blend.

Thanks for the support Nick!

alerosaint

eah I agree the EFR is way more efficient than our stock turbos.

Personally I just want the bolt on solution but yeah GM your setup is Bad ass. When I go EFR I probablly wont be pushing it close to its limit .

Im all for making things cooler. Heat is evil!!

raver0789

Wow 60 wtq more @5.3k and 90whp more @ 6k than my stock turbo dyno graph you guys posted. This must fly. Kinda scary since my e47 tune gives you the g feeling wot in 3rd. Same power at 3k. Insane.

Sevensix9

Looks good but man, a straight up Bolton turbo solution would sell like hot cakes!