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 jvans5434
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| posted on June 6th, 2010 at 11:56 AM |
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1600 single port performance upgrade?
howdy all! I'm an aussie vee dubber virgin, so here goes...
my first time!
I bought an 1972 microbus - ex military that took me pretty much right the way around australia! Am restoring the bus, paint and panel etc. And now
have come to the engine.
It is a 1600 upright single port with a dinky carb, non original, part numbers suggest it came from a karmann or a beetle.
It was very pokey... So i am just after your thoughts on what i can do to this engine to give it a bit of street cred. (although it is a kombi)
Of course I'm on a budget which is limiting, (if i wasn't I'd do one of those chirco or wolfburg west 2332 kits with the lot)
What do I do? Larger exhaust, dual port heads w/ dual carbs?
I saw a single port on youtube that was nuts! how do i do that?
I also have a set of triple su's, but i have never seen them on a vw engine - have you?
Also, a vee dub mechanice told me to have a millimeter taken off the heads, - what would that do? And what other adjustments would i have to make?
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71-BEETLE-SEDAN
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| posted on June 6th, 2010 at 12:10 PM |
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Hey mate, a while back someone was talking bout sus on a bug. But sundays are slower days on here. Espescially this early in the morning.
But im sure someone will be on soon enought that can help you out.
Also where are you in the worldcause it might help to go speak to some vw shops near you.
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jvans5434
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| posted on June 6th, 2010 at 01:04 PM |
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i'm 3 hrs north of adelaide. I know most vw shops in adelaide, but alot of them have stopped carrying aircooled parts  I'm pretty much reliant on mail order. I am a buyer of vwma, and know
pretty much all of the australian suppliers online. You reckon they'd know best eh?
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jvans5434
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| posted on June 6th, 2010 at 01:21 PM |
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http://www.aircooled.net/gnrlsite/resource/articles/carbs101.htm
found this website re: carburetors looks good, suggests i should stay with the center mount style but progressive carby....
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t1 time
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| posted on June 6th, 2010 at 01:29 PM |
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do you have a link to that youtube vid of the singleport thats nuts.
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bajachris88
A.k.a.: Chris Leete
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| posted on June 6th, 2010 at 05:13 PM |
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Taking a mm off the heads will increase your compression ratio a little. That will help.
If you go from single port to dual port, you will loose bottom end torque.
But would have better top end if go dual port heads, polish the ports, with dual weber 36 IDFs or something. These carbs are overkill but can be
jetted small enough. having such carbs will allow for future use on larger bore/stroke donks too so it allows upgrade flexibility in the future.
however, they are exy though. what budget constraints are we talking?
for the very cheap alternative (talking less than $400 if you shop around):
better yet, stock bits wise you could get 2 x stock twin port heads, polish em, get a stock dual carb type 3 setup with hi-flow filters / velocity
stacks (again, won't make much difference with stacks but helps where eva can right?) and do a wtb for a second hand extractor system (cheap, might
need a wire wheel and some zorst paint for rust).
if i remember right, the single port 1600's pushed out 55hp? and the dual port twin carb 1600s did 65? with the zorst, might get extra 5%, like 2 or
3 hp. again, too large a zorst, the more you will loose your bottom end. If you got the head shaved a fraction, i rekon you could reach 70hp at the
flywheel. You would want to run hi-octane / premium then though.
(ô_!_/ô) (ô_!_/ô)
69' baja: kombi box, thing spindles, irs, disc front, type 3 rear drums, 2 inch lift kit, 31x10 rears. 
New engine in process: 94mm p&bs, 74mm C/w chomol Crank, 35.5x39 SP heads, turbo. Wierd combo, hopeful torque monsta! |
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71-BEETLE-SEDAN
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| posted on June 6th, 2010 at 05:51 PM |
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I have a header if you want.
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jsheppard64
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| posted on June 6th, 2010 at 06:21 PM |
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hey I have a single su on my beetle
very iffy to tune and finding the right needle
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 Bizarre
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| posted on June 6th, 2010 at 07:02 PM |
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Do you want to split the case or do top end??
Is it a reliable around Australia bus or a week end warrior??
A 1600 with dual webers on a set of twin port heads with a half decent exhaust and a mild cam will give it some poke
Something stockish (heavy walled pistons) with deep breaths (webers or Dellortos), decent innards (mild cam) and a big bum (fully merged exhaust)
But................
A 1972 MAY be a model that can take a Type 4 motor??
Adding a 2.0 L or a 1.8L will give it a BAG of torque which is what a bus needs
A "chirco or wolfburg west 2332" aint gunna be all that reliable in a heavy bus
What you are looking for is low down grunt
Futue te ipsum!!!
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wiseoldub
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| posted on June 7th, 2010 at 04:03 PM |
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last time I looked into this , I ended up with a 40 dcn weber on a custom made manifold for a single port motor. This cost me around $350 and matched
with a good $50 set of second hand extractors, I ended up with a nice little growl in a reliable fuel efficient ride. I personally like single port
motors as I find them maintenance friendly and torquey!
I can have a dig around my shed and see if I still have the manifold if you like?
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68AutoBug
A.k.a.: Lee Noonan
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| posted on June 7th, 2010 at 09:33 PM |
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| Quote: | Originally
posted by jsheppard64
hey I have a single su on my beetle
very iffy to tune and finding the right needle
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Hi
Don't see many SU's about nowadays.. lol
and OK on the needle....
and tuning.... lol
probably the only reason they aren't used much on VWs is because they aren't German...
but the "dreaded" British... lol
cheers
LEE
- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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68AutoBug
A.k.a.: Lee Noonan
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 posted on June 7th, 2010 at 09:39 PM |
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| Quote: | Originally
posted by jvans5434
howdy all! I'm an aussie vee dubber virgin, so here goes...
my first time!
I bought an 1972 microbus - ex military that took me pretty much right the way around australia! Am restoring the bus, paint and panel etc. And now
have come to the engine.
It is a 1600 upright single port with a dinky carb, non original, part numbers suggest it came from a karmann or a beetle.
It was very pokey... So i am just after your thoughts on what i can do to this engine to give it a bit of street cred. (although it is a kombi)
Of course I'm on a budget which is limiting, (if i wasn't I'd do one of those chirco or wolfburg west 2332 kits with the lot)
What do I do? Larger exhaust, dual port heads w/ dual carbs?
I saw a single port on youtube that was nuts! how do i do that?
I also have a set of triple su's, but i have never seen them on a vw engine - have you?
Also, a vee dub mechanice told me to have a millimeter taken off the heads, - what would that do? And what other adjustments would i have to make?
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Twin SU's would be a slight gain...
not seen on many VWs because they were the opposition of the Beetles in the 60s... in the Minis.. lol
and Britisg NOT German.. lol
also extractor exhaust... another slight gain..
type 4 engines are VERY hard on Fuel and costly to repair..
better to go subaru if You are going to change engines IMHO
twin port gets You higher revs..
I prefer the single port engine in My beetle..
cheers
LEE
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- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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68AutoBug
A.k.a.: Lee Noonan
Aircooled Master
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 posted on June 8th, 2010 at 12:48 AM |
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[size=4]I forgot to mention
that painting Your engine red and yellow etc..
adds no horsepower at all...
just keeps Me busy... lol
even silver or yellow bolts don't do anything.. lol
LEE[/size]
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- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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pod
A.k.a.: paul mrvw061
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i`ve got to finish this thing one day
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| posted on June 8th, 2010 at 09:52 PM |
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what about a set of kads on single port manifolds??
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