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- Protomotive FAQ
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- Accessories
- Engine Building Tools for Porsche
- DIY (Do it yourself)
- Protomotive Merchandise
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- 911 Carrera / 930 Turbo (1978-1989)
- 964 Carrera / Carrera 4 (1989-1994)
- 993 Turbo 993 Carrera (1994-1998)
- 996 Turbo / GT2 / GT3-1 / 996 Carrera / 986 Boxster
- 997 Turbo / GT2 / GT2RS / GT3-2 / 997 Carrera / 987 Boxster
- 991 Turbo / GT2RS / GT3-3 / Carrera / Cayman / GT4 / 718 / 981 Boxster
- 992 Turbo Carrera GT3 GT4
- Panamera (970/971)
- Cayenne (955/957/958/9YA)
- Macan (95B/95B-2)
Stroker cranks for 930 964 993 GT3 996t 997t
Features:
- Forged and polished billet cranks available in 80.4 stroke.
- We’re running the 996 GT3 3.6/3.8 rod bearings on 53mm journals for high torque and power setups to provide the best oiling cushion to keep your rod bearings alive.
- Protomotive stroker cranks utilize the OEM style oiling with slightly enlarged passages for the best reliability.
- Standard fitment of the Intermediate shaft drive gear as opposed to the 4.0 gt3 factory crank that has a large shoulder and requires a 4.0 gear or machine work.
- 80.4 with rods are a drop in and typically require no clearancing.
- 82.4 require minor clearance / checking to oil pump / case.
- Lower your rotating mass weights at 30.5lbs vs. 33.0 on a stock crank.
How to build a 4.1 996 / 997.1 Turbo
- Use Protomotive 103.6 pistons and cylinders with longer liners designed for the stroker kits
- Also use 125mm stroker rods to complete the kit.
- Need help building your dream engine? Click here: Protomotive Porsche Engine Building
Why do Stroker cranks make more power?
- Stroker cranks increase the displacement of the engine, thus the total air moved per revolution. More air moved equates to more power.
- Stroker cranks have higher piston velocities. Due to the longer stroke, the piston travels further during each revolution of the engine. This means the piston is moving more quickly to accomplish this. The higher piston speed tends to improve the volumetric efficiency especially at lower rpm where smaller engines really need it!
- Boost response is improved due to the higher volume of air being moved from the displacement increase and improved volumetric efficiency.
- This all ends up making for an amazing engine with a very broad power curve that’s awesome for the street and track!
What else will I need for the bottom end rebuild?
- Main Bearings
- Rod Bearings
- Intermediate Shaft Bearings
- Engine Gasket Kit 996 Turbo, 997 Turbo
- Always inspect the intermediate shaft bolts! Peen, loctite or safety wire them if you’re not running a gt3 intermediate shaft.
- Inspect and/or Replace your oil pump. Gt3 oil pumps are great! Auto Verdi are even more fun…
- Timing Chains
- Timing Chain Ramps
- Chain Tensioners
- Feel free to contact us for a full kit!
Where can you learn more about Porsches?
- Protomotive’s YouTube Channel of course!
Weight | 38 lbs |
---|---|
Dimensions | 26 × 10 × 10 in |
Only logged in customers who have purchased this product may leave a review.
SKU: crankshaftproto80_4mm
Categories: Engine GT3-1, Engine GT3-2, Engine 911 Carrera, Engine 964, Engine 993 Carrera, Engine 993 Turbo, Engine 996 Turbo / X50 / GT2, Engine 997.1 Turbo / GT2RS
Tags: stroker, 4 liter crank, crankshaft, 99610202193, gt3-1, 4.0 liter crank, 4340, 99610202194, porsche, 80.4mm Stroker crank for Porsche, chromoly, Porsche gt3 4.0 crankshaft unavailable, 993, Porsche 996 turbo stroker crank, billet, gt3-2, 996, Porsche 997 turbo stroker crank, stroke, 997, stroker crank for porsche 911 turbo, Stroker crankshaft for Porsche, 997.1, stroker crank for porsche 996 turbo, stroker cranks, turbo, stroker crank for porsche 997 turbo, stroker crank for 993, power, 80.4mm crank for 997 turbo, Porsche stroker crank, gt3, 9971020218B, 80.4mm crankshaft, crank, 99610202195
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Trophy Performance2024-08-20Todd is a guru!!! So knowlegeable and always helpful, highly recommend them and their company!!!!b eason2024-07-24I've been working with Toddfor many years on many projects. His knowledge is unsurpassed. Customer service is top notch, before during and after the job. We were doing a 993 TT motor and he rattled some part numbers off the top of his head for some application! I thought I knew a lot about Porsches! Can't recommend him enough. You will not be disappointed.Brian Gibson2024-07-08I installed an MRN twin turbo kit on my 07 Cayman S which came with a canned tune. I never thought the car ran as well as it's potential. Todd at Protomotive remote tuned my car and it is now running perfectly. Now this Cayman has the smooth exhilarating horsepower it deserves along with perfect cold start, hot start, idle plus still getting 28mpg cruising at 80. Cheers, ToddNicholas Calderale2024-06-26Todd & his team at Protomotive are the best! He was so helpful with my 996 Turbo, car was having idling issues after install of k16 hybrid turbos and a few other mods. He was willing to work with my Mechanic over the phone to diagnose the problem. Truly cares about his customers and the product he gives out! Very refreshing to see now a days. Anyone on the fence about using Protomotive, DO IT they are great people! And make GREAT POWER😎simon charles ridge2024-06-08Porsche Performance Prophets! 🔮 As a lifelong Porsche fanatic, I've always dreamed of pushing my beloved steed to its absolute limits. But let's be real, modifying these German masterpieces is a delicate dance that requires equal parts skill, knowledge, and wizardry. That's where the true prophets at Protomotive Inc. come in. 💫 From the moment I made that fateful call, I knew I was in the presence of genuine high priests of Porsche performance. Todd's voice oozed wisdom and experience, instantly putting my mind at ease. These weren't just mechanics – they were oracles who spoke the ancient tongue of air-cooled flat-sixes and turbocharged beasts. 🔊 When my 911 finally arrived at their hallowed grounds, it was like witnessing a sacred ritual. With reverence and precision, they meticulously disassembled and examined every component, identifying weak points and potential pitfalls with an almost psychic ability. 🔮🧭 But the real sorcery happened when they started waving their wrenches like mystic wands. Piece by piece, they fortified and optimized my Porsche, imbuing it with newfound strength and vigor. It was as if they were channeling the spirits of legendary Porsche engineers from ages past. 👴🏼⚒️ And then, the grand unveiling – a reborn 911 that howled and snarled with the ferocity of a caged beast. Yet, beneath that raw, unleashed power laid a harmonious balance of drivability and reliability that could only be achieved through true automotive divination. 🐺⚡ From that day forward, I became a true believer in the prophets of Protomotive. These aren't just modifiers – they're high priests of the Church of Porsche Performance, possessing arcane knowledge and skills that border on the supernatural. If you seek to unlock your ride's true potential, put your faith in the prophets, for they shall lead you to the promised land of automotive nirvana! ⛪🏆Mosher Roth2024-06-08👍 The Porsche Whisperers! 🔑 As a die-hard Porsche fanatic, I've had my fair share of disappointing experiences with so-called "experts" who promise the world but fail to deliver. That all changed when I discovered the wizards at Protomotive Inc. 🧙♂️ From the moment I reached out, I knew I was in capable hands. Their level of communication and attention to detail blew me away. Todd, the master himself, listened intently to my goals and provided invaluable insights that immediately put me at ease. 💬 But the real magic happened when my beloved Porsche arrived at their shop. It was like they spoke a secret language that allowed them to tap into the very soul of my ride. With surgical precision, they dissected every component, addressing even the most minute issues that had plagued me for years. 🔍🩺 And then came the transformation. Protomotive waved their wands (or wrenches, in this case) and unleashed a level of performance that left me speechless. My Porsche emerged as a fire-breathing beast, purring with refined savagery that could only be achieved through their dark arts. 🐉🔥 But what truly sets Protomotive apart is their unwavering commitment to reliability. They didn't just make my Porsche faster; they made it bulletproof, ensuring that every mile would be a thrill ride without the fear of breakdowns or costly repairs. 🛡️ To sum it up, Protomotive isn't just a company; they're a brotherhood of Porsche whisperers who possess an almost mystical ability to unlock the true potential of these legendary machines. If you're ready to experience automotive sorcery at its finest, look no further than the masters at Protomotive Inc. Your Porsche will thank you! 🙌✨Simon Ridge2024-06-08⭐⭐⭐⭐⭐ Protomotive Inc. - Where Porsche Dreams Become Reality! 🏆 If you're a true Porsche enthusiast seeking unparalleled performance and craftsmanship, look no further than Protomotive Inc. This extraordinary company is a temple of Porsche worship, where passion meets expertise in the most electrifying way possible. 🔥 From the moment you step into their realm, you'll be greeted by a pack of adorable shop dogs, setting the tone for the warm and welcoming atmosphere that permeates this automotive sanctuary. 🐕🦺 But don't let the furry companions fool you – the real magic happens in the hands of the masterminds behind Protomotive. Todd and Cynthia Knighton, the dynamic duo at the helm, are true artists when it comes to unleashing the full potential of these German engineering marvels. 🇩🇪 With years of experience and an unwavering dedication to perfection, they have honed their skills to create some of the most jaw-droppingly powerful and reliable Porsches on the planet. From intricate engine builds to mind-blowing turbo setups, every project undertaken by Protomotive is a testament to their relentless pursuit of excellence. And with talents like Samantha, Matthew, and Austin contributing their unique expertise, you can rest assured that your Porsche will receive the utmost care and attention to detail. 👨🔧👩🔧 But what truly sets Protomotive apart is their ability to strike the perfect balance between raw power and drivability. Their creations are engineered to deliver an exhilarating driving experience that will leave you grinning from ear to ear, whether you're carving up the track or conquering the open road. 🏎️😁 So, if you're ready to embark on an unforgettable journey where dreams become reality, look no further than Protomotive Inc. This is where legends are born, and Porsche enthusiasts from around the world come to have their wildest automotive desires fulfilled. Embrace the passion, feel the adrenaline, and join the Protomotive family today! ⚡Trevor Morris2024-04-22Todd is the ultimate godfather of Porcshe! His knowledge and informative videos have been invaluable to me as a Porsche enthusiast. I'm incredibly grateful for his expertise and guidance. I had an intermittent problem with my 996tt that has plagued the car for 6 years, no shops were able to figure out the problem. I emailed Todd and he narrowed it down within a couple emails, and sure enough he guided me to the problem and it was a simple fix in the end. Not to mention Todd's tuning skills are off the charts, as the car also traps 144mph in the 1/4 mile. Keep up the fantastic work, Todd!Chris Roundtree2024-02-19I wanted to thank Todd at Protomotive Motorsports for going above and beyond when he helped me sort out a problem with a product that I had purchased from another vendor. Todd seems to always have the knowledge to put together the best combination of parts to make any model Porsche not only go fast or handle better, but do it reliably. He always answers the phone. In the rare event he doesn’t pick up he gets back to you within twenty four hours. Emails get responded to just as quick. I really appreciate having some like Todd available when working on any Porsche as you know he has a proven setup to satisfy any goal. Thx ChrisAntreas Smilas2024-01-22Super in every way..2 years now in ecu and tcu perfect power delivery ,reliable,and fast as mr Todd promise in number...i can say even i draggy was the same numbers as promise to achieve with this set up.Load more
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