diffrence between a 914 and a type 4?

daylight · Post by **daylight** » Fri Jun 05, 2009 12:32 am

what is the diffrence between a 914 and type 4 motors?

aircooledtechguy · Post by **aircooledtechguy** » Fri Jun 05, 2009 7:52 am

Not much at all. Pistons, heads (for the 2.0L Porsche), plenum and runners (for the 2.0L Porsche) engine tins. Off the top of my head that's about it. They all use the same case, crank/rods, cam (same profiles too!), heads etc. I'm probably forgetting some other minor differences that others will chime in with, but it's all pretty superficial in nature.

sideshow · Post by **sideshow** » Fri Jun 05, 2009 10:45 am

flywheel is the big not obvious difference.

raygreenwood · Post by **raygreenwood** » Fri Jun 05, 2009 12:29 pm

To get terminology straight...all the engines in question are type 4.
That goes for Porsche 914 1.7,1.8 and 2.0, VW 411/412 1.7 and 1.8 and VW bus 1.7,1.8 ans 2.0 before the Vanagon WBX.

You guys pretty much got the diffferences right but I want to be a little clearer: By engines..we are talking case and internals. There are a lot of detail differences...some minor...some major on bolt on parts from fuel through ignition through exhaust through manifolding.

The 2.0 Porsche 914 had unique pistons and heads, runner diameters for FI and the plenum and TB. Thats about it.
The crank was the same as the 2.0 bus...71mm...nothing fancier.

The 1.7, and 1.8... used the same crank and the 1.7, 1.8 and 2.0 all used the same cam (except for a Euro grind on the 2.0 not available here IIRC).

The flywheel was different. 5mm offset.

There is not one iota of significant difference between the VW 411/412 1.7 and 1.8 engines and the Porsche 914 version. Ray

68Ghia · Post by **68Ghia** » Thu Jun 18, 2009 9:03 pm

No mention of sodium filled exhaust valves????????

fusername · Post by **fusername** » Mon Jun 22, 2009 9:46 am

although it has locating pins, can the porsche clutch/disk be used on a 215mm bus flywheel? also what about injectors, are they the same? I will come up w/ more questions soon, I have some parts motors that I need to decide what to keep and sell. need to feed my bus, she is hungry again.

itlives · Post by **itlives** » Sun Sep 06, 2009 8:03 pm

I bought a 1.8 head from a (good) guy on 914club.com.
The intake valve guides OD measured 12mm -which is for a 2.0L. ( the 1.8L intake valve guides OD should be 13mm).
Anybody ever run into this?

Post by **Piledriver** » Sun Sep 06, 2009 9:39 pm

itlives wrote:I bought a 1.8 head from a (good) guy on 914club.com.
The intake valve guides OD measured 12mm -which is for a 2.0L. ( the 1.8L intake valve guides OD should be 13mm).
Anybody ever run into this?

Guess:The heads bores for the guides were probably worn out and they upsized to what was available?

Fusername-- The disc, yes. The PP and FW stay together.

Try facing 5mm off the ring gear and have it resurfaced, then go. Nice forged flywheel, already bored for the pilot bearing.

fusername · Post by **fusername** » Sun Sep 06, 2009 11:24 pm

I had a feeling it just needed some material removed. sounds easier and cheaper than hunting down a clutch and flyheel too. was even considering just spacing the starter from the tranny, but that is getting too over the top.

Post by **Piledriver** » Mon Sep 07, 2009 3:20 am

68Ghia wrote:No mention of sodium filled exhaust valves????????

We Don't Talk About Sodium Filled Exhaust Valves...
(Modern ones are supposedly much better, and some people swear by them, rather than at them...)

None of my motors have them, and never will.
(Unless I find some new OG Mercedes 2.3 38mm ones in 8mm stem cheap, then I'd think about it

)