How I put a 13B in a 914
04-06-09, 09:06 PM
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How I put a 13B in a 914
I had a rotary 914 about 20 years ago,, I saved most of my parts and now pretty soon I will have another one.
my set up:
13B street port (old school 4 port)
50mm throttle body
Kennedy engineering adapter plate
Porsche 901 transmission
my set up:
13B street port (old school 4 port)
50mm throttle body
Kennedy engineering adapter plate
Porsche 901 transmission
04-06-09, 09:20 PM
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Currently I am trying to figure out what is the correct fuel pressure to run with my E6K, and how to tune it better. The car starts and idles but it's rich. I'm reading all I can about tuning the E6K, but is it really as easy as "home", "up arrow" and "down arrow"? I have a wide band O2 to help me tune. Any suggestions or tips?
04-07-09, 01:11 AM
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No ****!
Bravo on the project man!
On the fuel, I think most of us run between 35-45psi base pressure. Some big turbo nuts once they start to go bonkers will up that. What are you setting it at now?
And yes, adjusting the fuel really is that easy. for every given RPM you have your differing loads, and injector pulse width is the variable for each load at each RPM point.
If it's rich, pull fuel out of the RPM and load point in which it is rich. As you can imagine there is alot of that to be done between 0-8000RPM! I've been spending the winter teaching myself about my e6x (same but with a windows interface), so I'm still a beginner as well. It sure is fun to learn and discover the capabilities of these ecu's though!
I'm running a turbo so I'm not 100% sure on N/A applications but for WOT i'd tune for 13.0 (maybe 12.5 if you're nervous) on an N/A (definitely NOT this lean under boost), about the same for idle, and 15.0-ish for low load/hi vacuum situations (cruising for MPG). Too lean and it will start to stumble and run rough (usually around 16.0 when cruising, or 13.5-14.0 for idle). Richer than that and you're just wasting fuel.
there are some threads on ideal afrs for N/a's in the performance and ecu sections. Good luck!
Bravo on the project man!
On the fuel, I think most of us run between 35-45psi base pressure. Some big turbo nuts once they start to go bonkers will up that. What are you setting it at now?
And yes, adjusting the fuel really is that easy. for every given RPM you have your differing loads, and injector pulse width is the variable for each load at each RPM point.
If it's rich, pull fuel out of the RPM and load point in which it is rich. As you can imagine there is alot of that to be done between 0-8000RPM! I've been spending the winter teaching myself about my e6x (same but with a windows interface), so I'm still a beginner as well. It sure is fun to learn and discover the capabilities of these ecu's though!
I'm running a turbo so I'm not 100% sure on N/A applications but for WOT i'd tune for 13.0 (maybe 12.5 if you're nervous) on an N/A (definitely NOT this lean under boost), about the same for idle, and 15.0-ish for low load/hi vacuum situations (cruising for MPG). Too lean and it will start to stumble and run rough (usually around 16.0 when cruising, or 13.5-14.0 for idle). Richer than that and you're just wasting fuel.
there are some threads on ideal afrs for N/a's in the performance and ecu sections. Good luck!
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04-07-09, 11:03 AM
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These porsche 901 transmissions are pretty strong if not abused (like really mean 1st gear burn outs) Alot of the V8 conversion folks use this transmission without the 1st gear (because they have all that torque)
Tasty Danish,, thanks for some ECU tips,, I have my fuel pressure at 30, but I'll be cranking it up, then I'll tune.
My other running stock 914 weighs in at 2080 lbs with a driver and a 1/4 tank of gas. we were corner balancing the car. These 914s are pretty damn light.
-Rob
Tasty Danish,, thanks for some ECU tips,, I have my fuel pressure at 30, but I'll be cranking it up, then I'll tune.
My other running stock 914 weighs in at 2080 lbs with a driver and a 1/4 tank of gas. we were corner balancing the car. These 914s are pretty damn light.
-Rob
04-07-09, 01:12 PM
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-Rob
10-28-09, 09:52 PM
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I got the car running pretty good by street tuning the haltech. Only getting 22 mpg,, gotta tune her better!
Here's some video
http://www.youtube.com/watch?v=6QyJ_O-ngbM
http://www.youtube.com/watch?v=OmhgULTZfuM
-Rob
Here's some video
http://www.youtube.com/watch?v=6QyJ_O-ngbM
http://www.youtube.com/watch?v=OmhgULTZfuM
-Rob
10-28-09, 10:52 PM
#20
The General RE
Cool! Nice job, 22mpg is pretty good.
My friend has a 13B powered 914 in San Francisco. The 901 has very nice ratios to suit the rotary. I am in the middle of a 911 3.2 DME conversion w/ WEVO 915 on my '74 914.
My friend has a 13B powered 914 in San Francisco. The 901 has very nice ratios to suit the rotary. I am in the middle of a 911 3.2 DME conversion w/ WEVO 915 on my '74 914.
10-29-09, 07:58 PM
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"Cool! Nice job, 22mpg is pretty good.
My friend has a 13B powered 914 in San Francisco. The 901 has very nice ratios to suit the rotary. I am in the middle of a 911 3.2 DME conversion w/ WEVO 915 on my '74 914. "
Does your friend in SF still drive his rotary 914 around? and, Your 914 sounds like it's not too shabby either! are you on club or world?
My friend has a 13B powered 914 in San Francisco. The 901 has very nice ratios to suit the rotary. I am in the middle of a 911 3.2 DME conversion w/ WEVO 915 on my '74 914. "
Does your friend in SF still drive his rotary 914 around? and, Your 914 sounds like it's not too shabby either! are you on club or world?
10-29-09, 09:20 PM
#23
The General RE
The 914 runs, but he has gotten distracted lately with a 20B turbo 911 project with a G5050 for the time being. It's posted on here somewhere. His 914 has a NA TII motor street ported with clipped '89 high compression rotors and a 650 Holley. Black, GT flares, 911 front end.
I am on both as nana's_914, but lost interest in posting on either lately. Screen name is because my grandmother bought the car new. The conversion is pretty far along at this point. All the big stuff is bolted up, engine, trans, axles, brakes, oil tank... I am working on some rust removal and fitting a GT style oil cooler right now... Then plumbing, wiring and start 'er up. Sorry there was no rotary content in this paragraph.
I am on both as nana's_914, but lost interest in posting on either lately. Screen name is because my grandmother bought the car new. The conversion is pretty far along at this point. All the big stuff is bolted up, engine, trans, axles, brakes, oil tank... I am working on some rust removal and fitting a GT style oil cooler right now... Then plumbing, wiring and start 'er up. Sorry there was no rotary content in this paragraph.
10-30-09, 03:50 PM
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Don't know how big your injectors are or other pertinent details. Maybe if you only use two at idle then phase in the other two when you need them. If they're BOSCH or pintle injectors, 30-40 psi at idle is fine. You do have a dynamic regulator right? Meaning that th efuel pressure increases with lower vacuum.
gd
gd
10-31-09, 12:30 AM
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I got the car running pretty good by street tuning the haltech. Only getting 22 mpg,, gotta tune her better!
Here's some video
http://www.youtube.com/watch?v=6QyJ_O-ngbM
http://www.youtube.com/watch?v=OmhgULTZfuM
-Rob
Here's some video
http://www.youtube.com/watch?v=6QyJ_O-ngbM
http://www.youtube.com/watch?v=OmhgULTZfuM
-Rob