DONT MIND SQUIGGILIE LINES AT END IT WAS LOSING SIGNAL.

The blue line is EF3 (tuned at 25 psi fell off to 23)
Red line is HKS 7460R (tuned for 23psi fell to 18)
Both tuned on 93oct

Mods (were same for both accept for inj/3port)
Hks 272
Map short runner
Megan o2
3inch turbo back
Injen piping/intake
Xs IC (3.5)
Walbro 255
Arp head studs
680 pte (7460r)
1000pte(ef3)
Ef3 had a 25psi wastegate NO 3 port
7460R was preloaded at 12psi and had a 3 port

***NOTE**** on the Dyno the 7460r boost fell from 23-18. On road it holds 23psi(tuner said it happens)
So in theory we will say 10hpish per 1psi. So will say the turbomade 360-370hp and 350/360tq.

IMO the HKS is a better turbo and is way more fun. Your full spool at 4k as to the ef3 its 5.2k. Ive enjoy the HKS way more and sounds awesome and just spools its *** off.

I was gonna go fp green bb. But after comparing graphs on my tuners computer the Hks is quicker in low/mid range. The fp green will win in top end.

 

That EF3 is spooling way late, I'm assuming it has been taken off the car already so troubleshooting isn't possible?

 

Hmmm I'm not sure why the GTII gave you the blues on the dyno as I know personally that it can do better than what the dyno chart states, but your road tune data sounds closer to accurate. I can't vouch for the EF3 as I have NO personal experiance with it but I know that it is also a good stock frame turbo... I mean MAP made it for crying out loud

 

Ef3 will murder the 7460r. Something is going on

 

Well the EF3 does murder the 7460r as per the dyno sheet from 4500 up. Thoses HKS 272s wil be holding back uptop. Get some GSC s3's or s2's and rev it out to 8k. then u will forget all abut the HKS turbo. lol

 

that EF3 looks way lazy. maybe loose wastegate actuator, etc.

 

Nope... Although this was an older version of maps ef3. Actuator was good

 

Wouldn't be apples to apples comparison now would it?

I've been running the HKS since it came out, previously on a stock 2.0 with S1 cams, and now on a 2.3 with S2 cams. I love the turbo. The spool is obnoxiously quick, which is what I wanted for autox and track purposes. No personal experience on the EF3, but my friend who runs it likes it also. For those chasing peak hp/tq numbers, the HKS is not designed for that. I makes decent power, but it shines in spool characteristis. My car is making 408hp/391tq using 93 pump gas @25psi on the KrazyHouse Customs mustang dyno. The HKS is choking the motor at this point, but whatever. I think its the perfect street turbo for those looking to upgrde, but not willing to go crazy.

 

CHURCH...+1^^^^^^^^^^^!!!! The GTII is a really good turbo and as previously stated it does spool its A$$ off. I made aroud 480 on E85 with my built 2.0L. Unfortuantely I want 500 on pump so imma try and part ways with mine. But hell I may just keep it as a back up

 

I LOVE this thing!!!

 

is that full boost at 5k?

 

Ef3 yes

 

I dont know much about the ef3, but id guess the spool should be better than that

 

Look at other EF3 results on this forum, for one reason or another this turbo is very lazy.

 

Its lazy because there is no 3 port to help it spool a little bit quicker. But still, I think the main point is that the HKS spools nicely compared to a big turbo like the EF3.

A good street turbo will be a small upgrade from stock. You want more power then up top with a big turbo then you will sacrifice low end power and torque.

Also to the OP, looks like the tune could have better on either turbo. The power should not have been dying off at 5000 rpm.