oozkarao

iTrader: (2)

This car has a lot of mods here and there

Do we really need all those additional bolt-ons for this turbo to run efficiently? In other words, considering it does not do much torque (and possibly runs the air cooler than the stock turbo since the stock unit runs too hot at high boost), could we just add this turbo to a Stage 2 car and have good gains? My car is currently stage 2. I am considering a turbo upgrade, but I would much rather just change the turbo and leave the rest as is. In fact, I'd rather not even change the stock FMIC

Kracka

iTrader: (49)

Go for it then, the additional mods just make the gains that much larger, it will be a great turbo to add to a standard stage 2 package!

HAHAV8

How much power do you think the ported em/im/tb are adding?

Do you feel this turbo will produce slightly less power than an Green/BBX lite?

Kracka

iTrader: (49)

Here is my chart before/after the ported IM/TB/EM (I did them all at the same time):


Originally I had purchased a FP Green but then decided to go for the EF2 instead. Cobb has a lot of experience with the Green and estimated I would pick up ~40whp with the Green on stock cams. I ended up gaining 48whp with the EF2 so I'm going to call that very close and say the peak gains would be equivalent, but with the advantage of spool and transient response going to the EF2. These turbos are all in the same ballpark.

HAHAV8

Thanks for the graph and write up!

I've been doing as much research as possible already, looking for the same thing you were, quick spool, good drivability, and most importantly realiability.

Hopefully there will be more people who try this turbo out and post up their graphs, this turbo looks impressive, since most greens/lites I see ususally gain 40-50whp over the stock turbo in the higher RPMs, but don't quite have the same spool as this, which makes this a very good possibility for my next turbo.

scheides

iTrader: (10)

You can throw turbos on mostly stock cars but you really need supporting mods to get the most out of it, especially on pump gas. On e85 it's less of an issue IMHO but on pump you really need a bigger fmic to consistently and reliably (read: long-term safety for your short block) make good power numbers. I put off some of these supporting mods when I did my BBX because I wanted to keep my car as simple as possible...long story short I never saw the numbers out of it I wanted until I had a bigger fmic, pipes, and manifold done.

Don't forget that adding mods to stock turbo will yield different gains than on an aftermarket one....it's all about percentages. Ported stuff might yield say 10whp on a stock turbo but on an aftermarket one it might be 15+

jyamona

iTrader: (8)

So you think the EF3 is going to blow motors? I'm assuming that's because of the torque it might hit on E85?

murlo26

iTrader: (9)

You are at good level now If you weren't a shop owner I'd say don't do it, lol.

But get er done since you are!

ChrisCarey

iTrader: (38)

I think it has the power potential to blow stock motors lol, even moreso when in the wrong hands in regards to tuning. I'm more concerned about my stock clutch and stock head bolts / head gasket!

murlo26

iTrader: (9)

My stock clutch, head bolts and gasket held up pretty well on my FPred on E85 at 33psi

The clutch slipped in 5th a bit so I threw in the ACT 6 puck but still had some grab left even after 24k miles.

The head bolts and head gasket are pretty damn good on the X, very very few people have had problems.

I'd say the rods will go first imo.

elusiveGSR

iTrader: (1)

Youre refferring to completly bone stock motors right ?? Cause I ordered the EF3 and I do have supporting mods on a stock block..

ChrisCarey

iTrader: (38)

All I'm saying is that the EF3 turbocharger is capable of making more power than the limitations of a stock shortblock. You just need to be careful when tuning and select a power level that you and your tuner agree upon is safe for your application.

jyamona

iTrader: (8)

I would hope this would be the case w/ any turbo Hell, the stock turbo can toast your block if you're running a huge boost spike for torque.

m3typer

iTrader: (6)

I like this turbo....A lot. It spools basically like stock, pulls to redline, and adds about 50whp on top, all the while being within reliable limits of the block. All pros no cons...if I ever upgrade...indeed, it will be this.

oozkarao

iTrader: (2)

One important question then: What else does it really need on top of Stage 2?
- Does it require bigger injectors even for non-E85 fuels?
- Stock 2011 GSRs can hold the boost up to as much 28-29 PSI; so perhaps '11 models wouldn't need a 3-port solenoid, either?

I am seriously considering this turbo before next summer, and was thinking I would install it along with ETS's downpipe to maximize its flow, and injectors (w/ pump) only if it's necessary, and that's it.

In other words: '11 Evo X Stage 2 (see signature) + EF2X + downpipe + injector/pump (if necessary): What do you guys think about this combo?