914-6 conversion question, what else do I need? Options

[Mr_Chu]

Ok, so I have a 914 and also a 911SC. I am going to throw in the 3.0-liter motor into my 914.

I have to change the oil tank, I have to do the ring and piston thing, motor mounts, heat exchangers and new oil lines and stuff. What else do I need to do?

I know I have to upgrade suspension and braking, but what else do I need in order to swap motors and tranmission? Do I need to modify anything else? I pretty much have all the pieces to do the conversion, the problem I'm having is actually starting!

Any comments, suggestions, or missing parts I might need to do the full swap?

This conversion is starting to be a nightmare and its also costing me a pretty penny! (IMG:style_emoticons/default/mad.gif) Any help would be greatly appreciated!

Also, thanks for the guys that gave me some pointers earlier. That really helped me out!

[seanery]

shift rod.

what year is the car?

[Mr_Chu]

It's a 74 914... 2.0-liter.

[Mr_Chu]

I can still use some advice.. <_<

[McMark]

Your question is too broad. Looks like you have a pretty complete list. What are you planning for step one? You'll need an engine mount conversion for the six. That'd be where I start. then cut the holes for the oil tank. Then get all the oil lines you'll need. Does that 911 have the 915 tranny? You'll need a shifter conversion. There's more...

Start with the motor mount and ask questions as you go.

[joea9146]

You will need a clutch adapter kit. You can get it from these guys.
http://www.kennedyeng.com/

You also need a Bell crank kit that bolts to the tranny and allows
the throttle linkage to work, or you will need to Fabricate something.

You will also need 914/6 Sheetmetal kit for the the Engine tin.

That should keep you busy for a while... if you purchase all these item figure about another $1200

(IMG:style_emoticons/default/smash.gif)

[seanery]

why the clutch adapter kit? (IMG:style_emoticons/default/confused24.gif)

[lylegd]

1) The 3.0 liter motor will require use of a special flywheel.
2) Your 914 has a 12 pin electrical connector in the engine bay. Your 911 motor comes with a 14 pin connector. Some rewiring and a connector change is needed. You can refer to the George Hussey 914/6 conversion manual for more details or track them down on the internet.
3) You didn't say whether you were staying with the original fuel injection system or going with carbs as part of this conversion. Depending on your answer, you will then have to install the appropriate fuel pump.
4) What is your plan for upgrading your brakes? Your stopping power MUST match your going power! Brake upgrades is a topic all by itself, but you do need to come up with a plan. I do not recommend that you stay with the original braking system.
5) You should consider replacing your rear springs with slightly stiffer ones to handle the increased weight. Otherwise your rear end will sag even more then normal.
6) You will need to fabricate a modified shifter shaft for your side shifter transaxle. The original (rear long)
shaft will not fit because it interferes with the heat exchangers. How you do this will depend on a number of factors, what front motor mount you use, what exhaust system you use, The front short, straight shaft can be used as is but the second shaft that is under the engine must be modified.
7) Your throttle linkage needs to be modified. Do you plan on using the original 914/6 type pivot shaft mounted off the right rear side of the transaxle? If yes, then be advised that your current intermediate plate on your transaxle does not have the threaded hole to mount this shaft. You have options on how to proceed, you can back date your intermediate plate to an early 911 one with the threaded hole, you can fabricate an externally mounted pivot shaft, you can bypass the pivot shaft completely with a custom built throttle linkage.
8) Replace your tachometer with one that will work with the 6 cyl. motor. (The electronics are different between the 4 and 6 cyl. tachs. You may also want to consider adding a 911 type oil temp and pressure gauge but that is up to you.
9) Have you found other Porsche owners in your area that have done this job before? You will need a support group to help you with all of the questions you will have. Then you can look at how they did it and ask them questions. This will save you a ton of time and money. Doing a 6 conversion is expensive but having to do things two or three times makes it even more so. Have you joined the local PCA club? Have you attended any of their tech sessions or other meetings? Those are ways to meet some of these people that have similar interests. Also there are many websites and chat groups that can help you.
10) If you haven't already done so, then you need to come up with an overall game plan. a) what is your objective? Is it a daily driver, an autocrosser, a show car? Based on your answer, you can then list the features you want the car to have, then based on those features you can brain storm a list of options to accomplish them. Then you choose what option you want to go with. If you do this, it will reduce but not eliminate false starts and minimize buying parts that you don't need/can't use. It will also force you to come up with realistic plans, cost estimates and timelines.
Lyle

[Joe Bob]

ring and piston thing....

What's that? The 3.0 has a headstud issue....unless the 3.0 you have is tired....

Consider a cam upgrade..the 964 cam really woke my CIS up....or are you switching to carbs?

Get in touch with Rich Johnson at a914guy@aol.com he has a lot parts. Stay away from Patrick Motorsports.....he an idiot.

Dave at GPR has good stuff....800-321-5432.

Search around for an oil tank...I prefer the ones that have AN fittings, makes it alot easier to make oil lines from Stainless aircraft hose. Other wise the lines are quite pricey or need adapting from 30mm to -12 or -10 AN.

[seanery]

I still don't get the adapter kit.

He has the motor/trans combo out of the 911. He's not using a 901.

[Joe Bob]

If he's using the 915 trnas....he needs to flip the ring gear. Unless he likes five reverse gears and one forward....don't think he's French.... (IMG:style_emoticons/default/blink.gif)

The 901 trans is fine for a 3.0....but it DOES need an adapter.

[seanery]

I knew the R/P but 2 people said he needed an adapter. I was just looking for clarification on that.

I believe you may have possibly kinda given me some sort of clarification maybe.

[McMark]

He doesn't need an adapter. The transmission and engine already mount up, they're both from the same car!

[Mr_Chu]

Hey guys I appreciate the help.

First of all I need to get a motor mount. Do I need a mount for my transmission as well? A costly 915 tranny rebuild seems to be in my future. (The r/p thing is confusing the hell out of me)

I also need the sheet metal. Will the 914-6 sheet metal kit be able to fit the 3.0 liter motor from my 911 sc? Cause afterall, the original 6 is a 2.0-liter motor.

And if I get a stock 914-6 oil tank.. will it fit right in between the fender and motor? Or do i have to cut and weld?

Heat exchangers is another thing i'm kind of confused about. Should i get the 914-6 heat exchangers? Will that bolt onto my SC motor or do I need to find some other kind of heat exchangers?

And one of you said something about a special flywheel? Can you clarify this for me.

As for the fuel injection thing, as much as I would like to convert my motor to carbs, I think that using the fuel injection system off of the SC engine would be the most easy way for me to do it. Or is it? I'm not too sure about this yet. But turning to Carbs is more money that I don't really have.

As for my cars, I really dont want to take apart everything just yet. Both my cars are runnning perfectly. I would actually like to collect all the necessary pieces before i actually start stripping. Afterall, two cars are easier to move around if they are together rather than moving 100 billion pieces!

I bought a whole 911SC for my conversion. In the beginning all I wanted was more of a punch to my 914. The cost of this is definitely racking up! So if any of you guys out there know of places that sell this kind of stuff at a good price.. please recommend!

Again, thanks to all the guys that responded!

[McMark]

Hey guys I appreciate the help.  

First of all I need to get a motor mount.  Do I need a mount for my transmission as well?  A costly 915 tranny rebuild seems to be in my future.  (The r/p thing is confusing the hell out of me)

I'm not 100%, but I'm pretty sure the 915 bolts up to the stock mounts. Maybe an adapter?

I also need the sheet metal.  Will the 914-6 sheet metal kit be able to fit the 3.0 liter motor from my 911 sc?  Cause afterall, the original 6 is a 2.0-liter motor.  

Stock 914-6 sheet metal will fit.

And if I get a stock 914-6 oil tank.. will it fit right in between the fender and motor?  Or do i have to cut and weld?  

The 914-6 oil tank goes in between the outer fender and the inner fender. Or, to say it another way, in the wheel well. It doesn't go in the engine bay. If you look over near the relay board (drivers side engine bay) you'll see some circular flat spots. Those are the places that need to be cut out for the oil tank to poke through.

Heat exchangers is another thing i'm kind of confused about.  Should i get the 914-6 heat exchangers?  Will that bolt onto my SC motor or do I need to find some other kind of heat exchangers?  

Stock heat exchangers will be bad for horsepower. Get headers.

And one of you said something about a special flywheel?  Can you clarify this for me.

He was mistaken. No special flywheel.

As for the fuel injection thing, as much as I would like to convert my motor to carbs, I think that using the fuel injection system off of the SC engine would be the most easy way for me to do it.  Or is it?  I'm not too sure about this yet.  But turning to Carbs is more money that I don't really have.

Keep the fuel injection. Carbs suck. (IMG:style_emoticons/default/tongue.gif) It'll take a little thinking to get the wiring harness converted over, but once that's done it's plug and play.

Keep up posted.

[jgiroux67]

Unless he likes five reverse gears and one forward....don't think he's French....

(IMG:style_emoticons/default/laugh.gif) (IMG:style_emoticons/default/laugh.gif) (IMG:style_emoticons/default/laugh.gif)
I'm french and I still find this fricken hilarious

[Mr_Chu]

thanks guys..

Do any of you guys know a good place to buy pieces for this? I need...

Oil tank, oil cooler..
motor mount..
914-6 sheet metal..
headers/heat exchangers...

I think thats it. I'm shopping around and a lot of the places I went to is charging an arm and a leg!

[Joe Bob]

As mentioned before....
GPR.. 800-321-5432
Rich Johnson a914guy@aol.com

Or keep an eye on ebay....

as to adapters.....

1) 915 trans with 3.0, no adapter needed...but needs ring gear flipped

2) 901 trans, with 3.0 needs adapter FLYWHEEL

3) If converting a 914/4 to a six, ya need a motor mount....if it's an original six, NO motor mount is neeed, use the one that's in there....

4) Oil tank specific to the 914/6 will fit in the wheel well.

5) Oil lines SPECIFIC to the 914/6 can be bought but making them with Metric to AN adpaters, s/s aircraft line and AN fittings is cheaper....

6) Any time you think it's over you need more stuff....

7) 914/6 heat exchangers really ARE that expensive.....either buy headers and wear a coat or buy them...they are only getting more expensive....

8) You will more than likely need an external oil cooler.....they ain't cheap either...buy new, you never should use a used cooler.....

[ArtechnikA]

you will also need to have the on-engine oil cooler modified so it will clear the rear suspension, or try to find a NOS 914.6 oil cooler. there are a few places that can ultrasonically clean and modify the cooler fitting as required.

if you're using the deeply finned 'Turbo' exhaust rocker covers, you'll need to shave the fins a bit so you can get the covers off without dropping the engine.

[seanery]

Rich Clewett does the oil cooler conversion:
Rich Clewett webpage