engine exhaust and muffler help

914 engine is the same design as VW type 2 bus from 73 up. There is a change of manifold designs around 75. Need pic of the manifold outlets to help you out. www.cip1.com has some mufflers and systems for the busses.

If the intake manifold has 3 bolts attaching each end to the heads it is a Porsche 2.0 914 engine. If it has 4 then it is a VW bus type 4 engine or a smaller Porsche engine. Pics will help.

Host the pics at a site such as www.photobucket.com then caopy the link to your threar here.

Judging from the photo it is 75-78. It IS NOT a Porsche. It is a bus engine.

www.cip1.ca/searchresults.asp?cat=1533 Has mufflers and systems. You are missing the heat exchangers that attach to the turnarounds. Due to this you will have to make up straight pipes to connect to the header/muffler such as this www.cip1.ca/ProductDetails.asp?ProductCode=ACC%2DD%2D2034%2D10 From there you can use any bus muffler that fits the merged header. To just quieten it down and retain the dual exhaust I suggest 2 Chevy Chevette mufflers to replace the cannons you have. You will have to save the mounting flanges off of the cannons.
Complete single muff systems are available but are expensive, you will need to know if the exh ports on the heads are oval or squared.

This year range was not available with carbs so I suspect the P/O converted it.

My buggy shown uses two Chevette mufflers. They run forward with the turnaround after the muffler so exh outlets are in front of the rear wheels.
This is a stock 73 Porsche 1800 dual carb with bus clutch. The location of the oil filler tube and dipstick on the Porsche is on the top of the block.
Nice throaty sound when hammering the throttle but not too loud when cruising.






My other buggy uses a 77 Bus 2.0 with stock EFI with conversion flywheel and 1700lb 200mm Kennedy clutch



Notice the oil filler. This blue buggy does use the Porsche cooling shroud with the timing window on the top and Porsche fan to make timing easier due to the license plate blocking the stock timing marks.

Porsche 2.0 {3 bolt heads} with Bus efi stuffed into my 74 Beetle. Notice oil filler cap below air temp sensor. Dipstick is beside it.




Yours has an aftermarket alternator {possibly from a toyota} Also the flywheel has probable been changed to a 72 as it is a direct bolt on and fits the Beetle trans using the bus clutch assy. New conversion flywheels are also available for the 200mm beetle clutch.



Can you post more pics of the top and bottom of the engine with some of the carbs and all manifolds? Also a pic of the serial number that is on the top of the cooling shroud.

I recommend pulling the engine to verify that the correct parts were used for the clutch and that the pilot bearing mod was done to the crank to support the trans input shaft. I have done this conversion many times. Post pics.

Kennedy clutch etc www.kennedyenginc.com/Pages/default.aspx

conversion info very good reading.
www.tunacan.net/t4/tech/clutch.htm

www.tunacan.net/t4/tech/flywheel.htm

Definitely a bus engine with aftermarket single carb engine number is at top of shroud below coil. Someone added the Porsche oil filler/crank case breather

At work will post results of engine number in morning

www.type2.com has engine code listings. click the link on the left called library then click identification

Engine code EDxxxxxxx is from a 1975 bus aka type 2, it is a 2.o liter originally fuel injected as carbs on the type 4 were only available from 72-74, and only as a dual carb setup. The engine is classified a type 4.Your engine is the same as the engine that is in my blue buggy above. A lot of people do not understand the simplicity of the VW injection system. It is far easier to diagnose and set up than a carb. It is a set it and forget it system that is pretty much bullet proof. If you ever want gto go back to inj, pick up a 75 to 79 bus. There are small differences between the years so you want the parts to match.

www.type2.com has a lot of info on the type 4 engines.

Like I mentioned earlier, take the engine out and post pics of the clutch / trans shaft and flywheel without the pressure plate.

this is just to see if the picture worked, and to show you what it looks like, i got it for less than 1000 so im happy about it

Hi Jason,



That's basically a straight through system and is pretty loud. The inlets and outlets all go into a common inner chamber. The bafflles only make it a little more mellow, but do little to reduce the noise level.

And the outlets hang down pretty low for a Bradley GT. That's the same unit (with inlets for a type 4 engine) that I had for mine with a type 1 engine and modified to raise the outlets. A lot of people use those on Bradley GT's, but I didn't like it on mine.

Gary Hammond,

I used something similar to this on my twoie and it tucked up pretty much out of the way

www.jbugs.com/product/2031-10W2535.html?Category_Code=vw-karmann-ghia-merged-mufflers-headers

or you could try and wrap your brain around this:
www.vwtrendsweb.com/tech/0109vwt_volkswagen_exhaust_test/viewall.html

there are tons of variations out there, from my experience it's best to buy either from a local shop or a mail order that has a fair return policy in case something doesn't fit to your liking

Hi Dan and Jason,

I think maybe we have some terminology confusion.

By "baffle" I meant a wall directly in the path of the exhaust flow that stops the gas flow and pressure wave causing it to instead flow through the perforations in the pipe to get to the next pipe.

There are no such blockages, or what I called "baffles".

The internal walls in the muffler shell just support the perforated pipes and form an open common chamber in the middle of the muffler, which is totally open to both the inlet tubes and the outlet tubes.

If you look at the exhaust flow in my drawing you will see that it is not forced through any of the perforations except for that caused by any resonate pressure wave and a little back pressure. That is what I ment by straight through.

So yes, there is some reduction in noise as well as a mellowing of the tone. But on my modified 1679cc type 1 engine, it was loud enough to attract the attention of the cops (and my wife) at full throttle and would POP loudly 2 or 3 times on deceleration. I didn't like that, even though it sounded nice at cruise.

I also didn't like the outlets hanging so low below the engine cover, so modified it to get the outlets on the top side instead of the bottom side of the muffler shell.



Gary Hammond,

There are bolt-in baffles that will cut the sound considerably both for motorcycle & car applications I have them on mine when my wife rides in the car with me.