Type 4 questions

This is the place to discuss, or get help with any of your Type 4 questions.

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buzzkillg230rc
Posts: 4
Joined: Fri Sep 15, 2017 10:08 am

Type 4 questions

Post by buzzkillg230rc » Fri Sep 15, 2017 11:37 am

Hi,
Im new to the forum and thought this would be a good place to ask about some concerns i have in regard to me rebuilding an engine.

I currently have a 76 Porsche 912e, its stock with 94mm pistons and 71mm stroke. it also has the complete fuel injection on it working. the reason for the rebuild is due to an exhaust valve leak. (hence it wont pass smog) .. I'm in the process of dropping the engine and since its going to come out for the heads to be worked, I was considering bumping the engine up to a 2056 using a 96mm kit and retaining the stock crank.

My questions are:
1. in doing this can I still use my stock heads or do they need to modified?
2. if i bump up the displacement, would i have issues in passing smog assuming everything is functioning as it should?

any responses and help is appreciated.

Thanks

Bsherrard
Posts: 23
Joined: Mon Jul 24, 2017 5:54 pm

Re: Type 4 questions

Post by Bsherrard » Fri Sep 15, 2017 12:30 pm

welcome to the forum. you might want to take a look at the air-cooled technology forum (http://www.shoptalkforums.com/viewforum.php?f=47)
there is a lot of good information there. I am not an expert but I am rebuilding my 912E to a 2270 and have done a lot of research and read many forums related to both the 2056 and 2270 upgrades. My understanding is that to go to a 2056, you may want to do some minor modifications to the heads. You should be aware that the heads on these engines are notorious for getting cracks due to overheating / heat cycling so that may very well be the issue with your exhaust valve leak. They also suffer dropped seats. Finding someone to work on the heads may be difficult unless you live in California and it will not be inexpensive. You can go to type4store.com and look up their 2056 kit to get an idea of what a complete overhaul/rebuild would entail based upon the Jake Raby kits from back in the day. You can use this list as a starting point and then identify what parts you can reuse from your engine, what parts you can source from other (less expensive) places and what (if any) parts you need to get from them. If you need new heads, the options are the RS+ head from the type 4 store (expensive but the best) or get some made up using the new castings available from AApistons.com I am aware of at least one other person doing a 912E that was able to get heads made from these castings from Brothers Machine in California. From what I have read, going to a 2056 is the absolute most you can do and still maintain the original EFI and smog. I have seen posts of people saying they were able to pass the smog in California with that setup and the stock cam. I'm sure others will have more to offer but this may at least give yo something to think at.

If you interested, I have a build thread here: http://www.912bbs.org/vb/showthread.php ... d-for-2037

Good Luck, Brook
p.s. it helps to give your name when you post. People are more willing to reply to a personal request.

wreck
Posts: 150
Joined: Thu Aug 14, 2014 2:07 am
Location: Brisbane Australia

Re: Type 4 questions

Post by wreck » Fri Sep 15, 2017 3:39 pm

Just curious on the 912 heads , are they the same as the 2lt 914 , i.e. different spark plug angle and 3 intake manifold studs ? if they are just normal type 4 heads then you have a few options depending on your budget . new standard AMC heads are a good option . the bigger the budget then that opens up for porting and bigger valves etc . If in the States then Len Hoffman or EMW would be worth a call . AA pistons have a fair range of stock and modified heads as well , I'm just not sure on the quality of their valves etc.

There are a lot of pit falls in building a reliable type 4 . things like new oil pumps not fitting and deck heights(longer cylinders) need to carefull attention, there is normally people on here that can give good advice and know the engines inside out .
No matter where you go , there you are !

Bsherrard
Posts: 23
Joined: Mon Jul 24, 2017 5:54 pm

Re: Type 4 questions

Post by Bsherrard » Fri Sep 15, 2017 3:45 pm

here is a link to a whole bunch of threads that someone gave me a while ago. lots of really good information on type IV builds.
https://www.thesamba.com/vw/forum/searc ... h_forum=12
The 912E heads are the same as the 914/2.0. They are 3 stud and have the same spark plug angle.
Len does not do any work on old heads, only does new ones which are sold through the type4 store. I am getting a set of the RS+ for my rebuild and had him increase the valves to match the LE180's that Jake used to use on his 2270 kits.
Brook

buzzkillg230rc
Posts: 4
Joined: Fri Sep 15, 2017 10:08 am

Re: Type 4 questions

Post by buzzkillg230rc » Fri Sep 15, 2017 5:54 pm

My name is DeAngelo
Im not far from brothers and might go pay them a visit after i pull the motor. Thanks for the links and responses.

Bsherrard
Posts: 23
Joined: Mon Jul 24, 2017 5:54 pm

Re: Type 4 questions

Post by Bsherrard » Tue Nov 14, 2017 8:36 pm

DeAngelo -
any update on your 912E project?
Brook

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raygreenwood
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Re: Type 4 questions

Post by raygreenwood » Thu Nov 16, 2017 12:25 pm

To be more precise....yes....the 2.0L 914 heads are notorious for cracking. Not the 1.7L or 1.8L.

Also....none of the type 4 heads......used normally and maintained properly in TYPE 4 ASED VEHICLES .....meaning 411, 412, 914, 912....are notorious for dropping valve seats. That is an issue with type 4 heads used in the VW bus.....which weights twice as much, has the aerodynamics of a brick, low gearing and chronically overheat the heads.

All of that being said....in the type 4 2.0 engine.....specific to 914 and 912.....at this late date in time virtually all of the castings ard 40 + years old....and will cost far more than they are worth to have welding done, new seats etc.

You can now buy brand new 2.0L 914 castings from several places. Do some seraching here. Ray

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