sutyak's turbo focus

[phillysrt4]

Good info. I hadn't heard that before.

my mustang's fuel pump works this way. the valve opens at 58psi

[phillysrt4]

If my goal this year is 400whp, then the GT2871R will push that maxed out with a great power curve. The GT3082 would hit that easily, but I'm afraid the power "under the curve" will be less with the slower spool time.

looks like you need to increase your goal! :)

SWEET turbo. If you dont want it id be tempted to take it.

[JeffreyCole]

Apparently Focuses (Foci?) dont have a traditional fuel pressure regulator, but the pump cycles on and off to regulate pressure?

Some searches also indicate that base fuel pressure for these cars is 40 PSI.

The problem seems to be occurring at 19psi if memory serves correctly.

Which would be ... 59PSI of total fuel pressure (with a 1:1 rate increase with boost).

Im REALLY curious to see if ths problem still happens at 19psi of boost.

[sutyak]

Apparently Focuses (Foci?) dont have a traditional fuel pressure regulator, but the pump cycles on and off to regulate pressure?

Some searches also indicate that base fuel pressure for these cars is 40 PSI.

The problem seems to be occurring at 19psi if memory serves correctly.

Which would be ... 59PSI of total fuel pressure (with a 1:1 rate increase with boost).

Im REALLY curious to see if ths problem still happens at 19psi of boost.

If you read back through, it doesn't occur with boost, but specific to 3.5v with the MAFia. I could reproduce with 15psi or 19psi, just different RPMs.

Cam specs:

MILD DAILY STREET USE: Idle-6500RPM
Good Idle, good low end and strong mid range power. OK for automatic or manual trans. For max HP use low restriction air intake and free flow exhaust. Valve Springs and Retainers- Not Required. Use stock compression ratio. ECU Re-Flash Recommended, but not mandatory.

Part Number: 224-0010
Grind Number: F-212/354-2SR-10
RPM Power Range: 1000-6000
Duration Intake @.050": 212
Duration Exhaust @.050": 204
Advertised Duration Intake : 232
Advertised Duration Exhaust: 224
Lobe Separation: 110
Valve Lash Intake: 0.01
Valve Lash Exhaust: 0.012
Gross Valve Lift Intake: 0.374
Gross Valve Lift Exhaust: 0.354

[phillysrt4]

sounds like the "crane 12" cams for the SRT from back in the day.

[sutyak]

The 3082 fits with a spare cast manifold I picked up recently, except it orients the turbo opposite how I have it now. I'd need a new downpipe, wastegate dump, ambient, and partial hot side to make it work. (so nearly everything)
If it fits with my current manifold then I would only need an ambient side and minor changes to the downpipe and hot side. I've decided to run the turbo eventually. I do think I'll need turbo-specific cams to help it spool.
Obviously I haven't clocked the turbo yet. I do plan on sending it off for a rebuild since it's used and I don't know all the history.

[sutyak]

A fun little history of the turbos of my Focus. I wish I had a vise view of the same angle for better perspective.

Turbo 1: IHI RHB52 from a Tbird. 52mm compressor wheel:


Turbo 1 + upgrade: IHI RHB52 and TD04 56mm compressor wheel:


Tubbo 2: Garrett GT2871R. 71mm compressor wheel (current):


Turbo 3: Garrett GTX3082R 82mm compressor wheel (future):

[PaxtonShelby]

Wwwwwwwwooooooossshhhhhhh!!!!!

[phillysrt4]

those are some cool turbo pics.

If you run across a pair of 30 frame turbos let me know :)

[sutyak]

those are some cool turbo pics.

If you run across a pair of 30 frame turbos let me know :)

Will do. I decided to keep the 82mm and grow into it. A pair of 3076 or GTX3071R would be amazing on that coyote.

[phillysrt4]

Will do. I decided to keep the 82mm and grow into it. A pair of 3076 or GTX3071R would be amazing on that coyote.

That's my fall 2016/winter 2017 build (built motor along with a manual trans that will hold up to it) unless I pop the motor sooner so I have an excuse to go hardcore

[PaxtonShelby]

I like the forethought here!!!

[sutyak]

Different MAF, same story. The car still cuts out around 15psi and 6500 RPM (approximately). Or 20psi and 5000 RPM, etc. The fuel pump is only at 70%. Looking at my logs I think my 60# injectors are maxed out. With the 3082R sitting on the shelf I'm going to skip the 80# and go to 96# or 127# injectors.
I also bought a spare fuel tank to play around with. I will likely modify it for a return fuel setup while maintaining the stock fuel level float. If I think I can still run a returnless setup without running dry on launch then I may stick with that and drop in a 400lph walbro pump. I want to have my hands on a spare tank and pump holder before I make any assumptions.

[Tom]

60s are definetly maxxed out at 400whp on a 4 cylinder. I'm running the bosch racing 127s on my car with a surge tank with 2 deatschwerks dw300s (and 1 in tank to fill the surge tank). The bosch racing injectors are supposed to have excellent control on the lower end compared to the cng injectors that a lot of people run.

[sutyak]

60s are definetly maxxed out at 400whp on a 4 cylinder. I'm running the bosch racing 127s on my car with a surge tank with 2 deatschwerks dw300s (and 1 in tank to fill the surge tank). The bosch racing injectors are supposed to have excellent control on the lower end compared to the cng injectors that a lot of people run.

I was also considering a surge tank. I'm not sure of all the benefits of a surge tank other than being able to use the stock tank and pump. Wouldn't a full return system with one big pump be simpler?

[Tom]

The fiero's gas tank isn't the greatest design in the world, so the surge tank gives you some protection if the gas sloshes away from the in-tank pump.

[sutyak]

The fiero's gas tank isn't the greatest design in the world, so the surge tank gives you some protection if the gas sloshes away from the in-tank pump.

Ah OK. There are a couple Focus guys who do the same thing because of the location of the fuel pump.
My thoughts (without having the tank in front of me) were to use the spare tank and add bungs to it and the bottom/rear for a return setup. I could probably just use the existing evap port for the return, but again just talking out my ear without even looking at it yet.

[phillysrt4]

60s are definetly maxxed out at 400whp on a 4 cylinder.

I have to agree with this. I had 680cc (65#) on my car pushing close to 400 and I didn't have too much left.

[sutyak]

Still fighting tuning issues. I typically tune myself, but the SCT software has some non-intuitive parameters that aren't in any documents and tend to be kept between SCT and dealers. A pet peeve of mine.
Anyway I've enlisted the help of a pro tuner to help me get around it.
The software is clipping spark and cutting fuel. I thought it may have been the MAF, then fuel injectors, considered fuel pump, but fuel pressure is holding well enough it shouldn't be happening.
Oh well I needed to step up to ID1000's for the next turbo anyway. Unless it's some dealer tuner secret I'll post up what the fix is when we find it. Hopefully we'll get this fixed soon.

[sutyak]

WOOOO! With some help from a professional tuner friend of mine tweaking some values that I can't even see in the SCT Pro Racer Package the car is running like a champ!
After some Mexico pulls against a 2015 STi and a 2015 Audi S3, I think my target of 11.9 with the GT2871R might be a bit ambitious unless I swap wastegate springs. I pulled on both of them, but not 11.9 area.
It spikes to 22psi then peters off to about 18-19psi. There may be more left in the boost controller. I'd feel comfortable saying it's a solid mid-12 car. There's definitely more in this motor.