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2.7 into 914 chassis

I am going a little on the limb with this, can I assume a stock 2.7 CIS engine will fit and perform well in a stock 914-4 chassis? For many years I have serviced 356 and 911 models for many years, but the 914 is new to me. The end result would be a street "racer", probably somewhat of an outlaw.
Any input is helpful

Old 11-19-2020, 03:11 PM
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Yes it will fit but with a 2.7 Cis you can expect 150-160 hp on a 2.7. Lots of money on the conversion when I think a better choice would be a type 4 with a 2056 kit. Same hp less weight.
Old 11-19-2020, 06:25 PM
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I've been told fitting the CIS Airbox from the 2.7 is a tight fit. May require some creativity around the engine compartment latch. Course, for some more money that isn't mine, you could ditch the CIS, redo the cams and throw on some carbs and pull closer to 200hp. You also need to change the engine mount to the 914-6 style ones (original or aftermarket) and then find a storage container for the 10qts of oil (914/6 style tank or run one up to the front trunk). Then there is the electrical issues to consider. And then there are braking concerns (100% more HP could tax those small unvented discs) which then makes one want to consider 911 suspension up front and larger rear brakes.. and heavier springs/tbs to handle the extra 200lbs the car now weighs.

ALL that said, many convert 914-4s to 6 cylinder cars.. with anything from 2.0l to a 3.8l engine. Its all been done before.

fwiw, I enjoyed a 2056cc engine for a number of years.. about 120hp.. and doesn't require as many "extras" to fit.
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Last edited by racer; 11-20-2020 at 07:36 AM..
Old 11-20-2020, 07:31 AM
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yes, but as others will point out, many other considerations to make in the process, transmission choice 901 vs 915, oil tank location, engine & tranny mounts, external oil cooler up front, chassis stiffening, CIS or carbs (easier fit), LSD a good choice, and the list really does go on from there. I am part way through putting a 3.0 CIS and 915 into a '74 chassis. Yes, a 2.7 will fit, just be prepare to throw cubic dollars at the project and lots of time. my two cents.
Old 11-20-2020, 05:26 PM
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The CIS intake interferes with the front bulkhead of the rear trunk, near where the latch for the engine lid mounts. I have seen both the intake modified, and the bulkhead modified. Note that the exact placement of the engine in the engine bay will affect this as well.

The rest is just a standard 914-6 conversion. Mounts, sheet metal, clutch, oil tank, oil cooler modification, and so on.

--DD
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Old 11-21-2020, 01:10 AM
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Quote:
Originally Posted by racer View Post
I've been told fitting the CIS Airbox from the 2.7 is a tight fit. May require some creativity around the engine compartment latch. Course, for some more money that isn't mine, you could ditch the CIS, redo the cams and throw on some carbs and pull closer to 200hp. You also need to change the engine mount to the 914-6 style ones (original or aftermarket) and then find a storage container for the 10qts of oil (914/6 style tank or run one up to the front trunk). Then there is the electrical issues to consider. And then there are braking concerns (100% more HP could tax those small unvented discs) which then makes one want to consider 911 suspension up front and larger rear brakes.. and heavier springs/tbs to handle the extra 200lbs the car now weighs.

ALL that said, many convert 914-4s to 6 cylinder cars.. with anything from 2.0l to a 3.8l engine. Its all been done before.

fwiw, I enjoyed a 2056cc engine for a number of years.. about 120hp.. and doesn't require as many "extras" to fit.
2056 sound like the easier route. The car came with a 1.8(shorter stroke), are 2.0 cranks available and piston/cylinder kits readily available?
I just brought the rusted hulk home today, I will be working the MIG for a while.

thanks to all
Old 11-21-2020, 03:41 PM
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930 it is daunting for a 6 conversion. I'm just finishing my 914-6 GT Tribute with a 2.2 S engine. I made a to-do list on my garage wall, added things I missed and crossed off projects done. Also did a parts list with possible cost and savings I could show wife. Then you need to print out every article regarding all the aspects of the build and review often.
All in, I'm happy with the direction I went. Engine/trans waiting for install. Best, Mark


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Old 11-22-2020, 09:11 AM
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Here's one source of information:

https://www.pelicanparts.com/914/914-6_construction_kit/914-6_info_guide.htm

--DD
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Old 11-22-2020, 02:43 PM
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I put a 2.7 with carbs in my 914. I found that if you lay things out sequentially, the job is straight forward and "relatively" easy to do. Lists are your friends. Sourced an engine that was built to (sorta) RS specs and couldn't be happier. The 901 transaxle will easily handle the torque of the engine without a cooler; a cooler is better, obviously. Oh, I went from 2.2 four to the -six and couldn't be happier. Bottom Line: As you're not breaking new ground here, this has all been done and documented. Good luck with your decision.
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Old 11-22-2020, 10:28 PM
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Thanks for the replies to all

Lists are always a good thing, but currently my list(s) are quite long and no signs of shortening soon. It sounds as though a 2056 might be the low hanging fruit of the week. I am sure a slightly tuned 2.7 will provide a nice kick, but now wondering if it is really necessary.
Old 11-23-2020, 12:37 PM
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Weight of a 2.7 cis 911 engine from 75-77 is 440 pounds
Weight of a 914 1.8 engine is 265 pounds.
Old 11-24-2020, 05:57 AM
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One good reason why I never had a large gf/wife. Either cut the pounds or add the hp. Simple math. One larger fire, I brought the rusted hulk home last weekend, bought it for cheap and sight unseen. It has been a few decades since I rebuilt a rusted VW Porsche. Kind of scratching my head where to start. Stabilize the chassis is generally number 1.

Old 11-24-2020, 04:53 PM
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