Wangspeed

iTrader: (2)

Comparing boost numbers is pointless.

AARON-SS-TC

iTrader: (3)

obviously these are vague things i am stating because of the ramp, torque management, timing and such, but thats why i have a thread on detailed tunes. this is on bolt-on turbos....hopefully that wr-2 is the real deal, because i will buy it before the end of the year...

Chevycobaltss3

iTrader: (2)

Lol, 26 spike 24 steady I made 399whp on 89/91 octane but this was a agrressive tune even with me knowing it was the two mix. 20g
Bnr will be roughly 350-370 most on 93 with lower boost and a correct tune for a dd
Frossb made 400+ on 24lbs on his 5557
Donkey ***** made 399 on his 6758 at the boost stated
When I'm done with the Zzp efr I'm tuning I'm sure he will dyno,
Brant (with his built block and head/cam combo was almost at 500whp on his 5857 on 23lbs on 93 octane (470ish whp)
There's more these are just my guys..

Chevycobaltss3

iTrader: (2)

Also, the first efrs were blowing wheels left as right. And best turbo for a stock engine to obtain good numbers low boost are the efr, 25g (my spool was 4k) and 252/256 bullseye turbos for quick spool. This is what I think.

AARON-SS-TC

iTrader: (3)

thanks james for the great info

Fastgti69

Definitely will dyno, and go to track for trap speeds.

Sully20

Hey James, Thanks for taking my call the other day lol, If I'm looking for Stock Spool and a goal of 400WHP which turbo would you recommend the 252et, 256et or the EFR?

AARON-SS-TC

iTrader: (3)

zzp zfr, or pwerks wr-2^^^^^ thats what im looking at

Sully20

Hmmm, P Works Wr-2 Huh? I'll have to look into that one, I dont know much about P Works....Its supposed to have close to stock spool?

AARON-SS-TC

iTrader: (3)

yes, the zzp may be rated at up to 500whp and the wr-2 is rated at 450whp max...Performance autowerks wr-2 is probably gonna be the cheapest route and true bolt-on....without E47/E85, the wr-2 seems to be around the 415whp and 400wtq on 93 with stock spool...

JBThrasher22

If the EFR was released it would actually be the same price point as you can buy the exhaust casting from zzp for 499 and the turbo itself is around $1500. So the price point of 2k is which both turbos will be at.

The P Werks is a modified "stock" k04 that looks to be bored and honed with bigger billet wheels. Basically a k04 + upgrade or how it should have been originally. You will be on max efficiency or maybe slightly out of efficiency to reach 400 whp with something like that I would imagine, where the EFR will be with in its efficiency range. But that is my opinion on the subject.

Chevycobaltss3

iTrader: (2)

The 6758 isn't rated at 500whp it's rated at 450chp so in order to hit more it requires to be out of efficiency and other adders.

AARON-SS-TC

iTrader: (3)

yeah, i see what you guys are sayin.
Even though the bolt-on turbos can hit 400whp, they are maxed out rather than being in the cooler, efficient levels of a different turbo.

40rty

where did you get those numbers?????

alerosaint

And thats what im looking for personally. A turbo that bolts n with the least amount of change to the engine(ie BOV etc) that can push ~400/400 with out breaking a sweat. That way it will be in its effieciency range. tune wont be aggressive and the turbo "should" last longer since its not being taxed. I know the efr is capable of more but thats all i need out of it. It fits my need all to well

SSlobalt

Blashpheming!!!

Fastgti69

With the way the EFR spools, I wouldn't mind have gone 1 step bigger. Just my opinion, but then again. I'm still in the process of tuning, I don't think I'm close to being done yet. James can attest to that.

Chevycobaltss3

iTrader: (2)

i need more logs lol (two so far) poopy!!!

AARON-SS-TC

iTrader: (3)

really???
From you and others on here, and the companys' website...common' man...lol

The Home of WERKSracing products!

Fastgti69

I know man, past two days at work have been hectic. I get home late and tired while its still too hot to log. I have to stay awake till midnight to log haha. Tonight for sure though, no excuses. I got off early

40rty

what i posted was 390whp 410trq

AARON-SS-TC

iTrader: (3)

yeah, on a solstice/sky redline..thats why i said 400whp+ for us cobalt guys because we have less powertrain loss...

Frogstofall

iTrader: (1)

Really shouldn't assume or post numbers until we have hard evidence. Its misleading.

Chevycobaltss3

iTrader: (2)

Lol. Numbers depend on dyno. I can go to a dyno and make 400whp on this dynojet. And then go to a dynojet a hour away and make 430whp same conditions. There are high reading dynoes and low reading ones.

40rty

you guys are about 6-7% less powertrain loss so that's roughly about 30whp or less. Nobody has tried it though.