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Gumba11's Avatar
 
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EFI guys.....

I am looking at buying a K27HF2 turbo for my new EFI project. Any thoughts or concerns on this turbo.

Car is a 77 930 3 Litre Euro Car.

Engine mods include, 3.2 Litre, 8:1 CR Fully finned Mahle P's and C's, Mild port and polish, balanced, CC'd, 964 camshafts, ARP rod bolts (yes I pulled it back apart!) Flame ringed, GHL Motorsports heat delete headers, Tial 46mm WG, HKS BOV (Vent to atmosphere), Full bay IC, Powertrip Performance Custom intake manifold with internal velocity stacks, 75mm throttle body, 85 lb. Delphi injectors, 4" Magnaflow Muffler (Single Exhaust), Spectre eMS-pro with Inovate Wideband. Whew, I think Im missing something somewhere....

Thanks for any info here. I just want to make sure Im getting the right turbo. I really dont want to go Garrett. My personal preference.
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77 930 "P Zilla" 3.2 Litre w / EFI conversion
Old 05-21-2007, 09:43 PM
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Nice build sheet.

How much power are you aiming for? What's the car going to be used for? Street? Track? Both?

The HF-S and HF2 would be well suited. I use to have a K27HF on my car. Never had any issues with it.
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'89 911 Turbo Cab
Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition
Old 05-21-2007, 11:30 PM
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Would like to end up with 550 to 600 RWHP.
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77 930 "P Zilla" 3.2 Litre w / EFI conversion
Old 05-22-2007, 12:19 AM
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Gumba11, where did u buy your 75mm trottle body and how much did u pay for, because I'm looking for the same size of trottle body.
Old 05-22-2007, 01:52 AM
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I have a similar build with the HF2. So far I've only made 417hp at 0.7 bar, although I found out one cam was off and I haven't dyno'd it since I fixed it. I expect to make around 500 rwhp at 1.0 bar.

To get over 500rwhp, I think you'd need Evo cams (I have 964 cams) and perhaps a bigger turbo. If you can wait another couple weeks before you buy, I should have mine on the dyno with full boost.
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Old 05-22-2007, 05:43 AM
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I will be running 1.2 bar with methanol injection. We will see what happens. Im not going to switch cams just yet. I will see how far I can go but imagine claims more than 600 HP is possible with the HF2.

My throttle body is a Professional Products 75mm 86-93 5.0 litre Mustang T body. Here is a link to the PP site. Follow the where to buy link to find a dealer in your area. I paid 149.00 for mine.

http://www.professional-products.com/where.html

Hope this helps!
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77 930 "P Zilla" 3.2 Litre w / EFI conversion
Old 05-22-2007, 06:59 AM
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my friend has a similar build on a '76 930
only real diff. being 993 n/a headers into a homemade tt setup
he is running old tec 2 management and used to drive the car every day (in new england)
car made 504 at the wheels when the clutch let go (1.2 bar) looked like it was headed for around 550
this was a few years ago, he says car is running much better now
john
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Old 05-22-2007, 07:47 AM
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Good to hear. Thanks for the help guys!!!
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77 930 "P Zilla" 3.2 Litre w / EFI conversion
Old 05-22-2007, 10:39 AM
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Chris my 0.02 if I may...... It took me 4 hrs to find this inf,lol

Turbo Findings, Heres 5 of the 11 turbos that we try

Even do we dyno each and everyone of them the findings are what work for me.

Garrett TO4B.58 Very nice turbo if you are just adding a turbo to a 3.2 without any internal modifications.

Garrett 60-1HI-FI.81 The all time favorite of mine supported 540hp very nicely on demand power but ran out of juice after 145mph. Power all the way accross.

T04S.81 Ok turbo nice mid range and will stay creeping but way to lazy down low, my least favorite.

Garrett T70.81 Very nice turbo,nice mid range lots of power, Slow spool

Garrett n/a This is the latest one, and one that I cannot disclose, lots lots of power.

I do have all the rpm and all the boost and all the other crap for them somewhere in my notebook. ( I have to find that now)

But is the "ENTIRE"combination that will give you the juice, those are just my findings.......

hope this somehow helps........
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Old 05-23-2007, 04:11 AM
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Quote:
Originally posted by juan ruiz
Chris my 0.02 if I may...... It took me 4 hrs to find this inf,lol

Turbo Findings, Heres 5 of the 11 turbos that we try

Even do we dyno each and everyone of them the findings are what work for me.

Garrett TO4B.58 Very nice turbo if you are just adding a turbo to a 3.2 without any internal modifications.

Garrett 60-1HI-FI.81 The all time favorite of mine supported 540hp very nicely on demand power but ran out of juice after 145mph. Power all the way accross.

T04S.81 Ok turbo nice mid range and will stay creeping but way to lazy down low, my least favorite.

Garrett T70.81 Very nice turbo,nice mid range lots of power, Slow spool

Garrett n/a This is the latest one, and one that I cannot disclose, lots lots of power.

I do have all the rpm and all the boost and all the other crap for them somewhere in my notebook. ( I have to find that now)

But is the "ENTIRE"combination that will give you the juice, those are just my findings.......

hope this somehow helps........
Juan,
Thanks. You haven't tried the GT35 or GT40 series of turbo's? They look pretty promising, don't they?
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Old 05-23-2007, 06:48 AM
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I still think that a GT 40 on 911 could do wonders, a Huge intake and a huge intercooler could be the key.

We will run a GT42R with a 200 shoot of NOS on our 4 cylinder project,

I'm sure before is all over we will try that GT42 on the 911

Here's a sample of our intake, the engine is a 2.0 4 cyl, so I don't see why a 3.2 or 3.3 with a GT 40 won't work, at the end of the day is all about how big your Cojones are

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10.76@139-1/4 mile
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Old 05-23-2007, 08:54 AM
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Quote:
Originally posted by Gumba11
My throttle body is a Professional Products 75mm 86-93 5.0 litre Mustang T body. Here is a link to the PP site. Follow the where to buy link to find a dealer in your area. I paid 149.00 for mine.

http://www.professional-products.com/where.html

Hope this helps!
Gumba11, is this a direct bolt-in upgrade? Any machining or adapters required? 75mm would be awesome
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Merv
'89 911 Turbo Cab
Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition
Old 05-23-2007, 04:41 PM
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My intake manifold is a custom fabricated unit from my sponsor, Power Trip Performance. I will be posting pics of it soon. It has a centered plenum chamber with velocity stacks exiting horizontally tapering through to a gradual 90 degree bend to the cylinder head. Throttle body location is still being decided between either the top middle of plenum or the front of the plenum mounted vertical.

As for a direct fit it will not just bolt up to a OE manifold. You might be able to get an adaptor for one. What manifold are you using and I can talk my fab guy and see if I can help you.
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77 930 "P Zilla" 3.2 Litre w / EFI conversion
Old 05-23-2007, 05:03 PM
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I'm just using the OEM Carrera manifold.
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Merv
'89 911 Turbo Cab
Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition
Old 05-23-2007, 05:14 PM
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Merv whats the final dyno numbers on your build?
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10.76@139-1/4 mile
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Old 05-23-2007, 06:20 PM
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Would you like me to look into an adaptor for you?
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77 930 "P Zilla" 3.2 Litre w / EFI conversion
Old 05-23-2007, 07:17 PM
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Quote:
Originally posted by juan ruiz
Merv whats the final dyno numbers on your build?
Juan, haven't dyno'd it yet... still need to hook up my twin plugged heads and do some minor adjustments to the setup to get it perfectly the way I want it before heading to the dyno

Stay "tuned"
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'89 911 Turbo Cab
Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition
Old 05-23-2007, 07:52 PM
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Chris, is the car been build for street ,road racing or ?
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10.76@139-1/4 mile
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Old 05-24-2007, 04:10 AM
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Quote:
Originally posted by juan ruiz
I still think that a GT 40 on 911 could do wonders, a Huge intake and a huge intercooler could be the key.

We will run a GT42R with a 200 shoot of NOS on our 4 cylinder project,

I'm sure before is all over we will try that GT42 on the 911

Here's a sample of our intake, the engine is a 2.0 4 cyl, so I don't see why a 3.2 or 3.3 with a GT 40 won't work, at the end of the day is all about how big your Cojones are

Juan, Nice to see you on the boards again.

We tried the GT40, and it spooled too late. I had no throttle respose. It was great after 80mph.

In a couple of weeks, we should be dynoing my car again. It has a new intercooler, turbo and dta pro 8 ems. Were looking to make between 500rwhp -550rwhp @1bar and about 650rwhp at max boost 20-24lbs
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Old 05-24-2007, 06:13 AM
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Juan,

The car will be used mainly as a hardcore street car with a track day once in a while.
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77 930 "P Zilla" 3.2 Litre w / EFI conversion
Old 05-24-2007, 06:53 AM
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