Hi, I hope you are all well :)
I am planning to upgrade my engine of 1974 model autostick and I wonder your opinions,,,
First of all, my aim is to have more low-end power.
Currently, I run 1600 cc engine with 1.3 manifold and H30/31 carb with stock dished cam and crank
My plan is to have:
Stock dished cam and crank
1679 cc with AA 88mmx69 thick wall pist&cyl. (slip-in on engine side and machine in on cylinder heads side 90,5/92)
1,6 manifold
30 pict 2 carb or H30/31 Carb. I have both. Which one would you prefer?
Accuspark SVDA electronic ignition,
Vw 2 tip gt exhaust system with j tubes.
Any ideas are welcome;
Thanks in advance,
I'm wondering why You need to upgrade the size of Your engine for low down power. My autostick has a 1600 single port engine with a SVDA distributor with electronic ignition. Extractor exhaust system with single muffler. I have heater boxes installed. You could try the original carburetor or the H30/31 if You can get it running correctly. [I couldn't get mine to run properly] It has 1500 single port heads. The carburetor I am using is a Brasillian made WEBER made for VW engines.
My car drives very good in LOW gear and I can take off at traffic lights beating most vehicles if I want to... I usually always use LOW gear to start off in... My gearbox has the low differential ratio which could help with the low speed.. 4.375 diff ratio which was used in 1300 & 1500 autosticks.
Lee in Australia
I generally drive with 2 or 3 passengers approximately weighting 350-400 kg. That's why I just prefer more torque rather than maximum speed.
Hi
You could replace the differential with one from a 1300 or 1500 which is 4.375 to 1. Your 1600 will have a higher diff [final drive] ratio [which I can't remember]. Although finding a good early gearbox maybe difficult. I have two spare gearboxes and both were from 1500 models so all have the low diff ratio... I was looking for a late gearbox with higher diff ratio....
Lee in Australia
Hi Lee,
Infact my gearbox is 4,375 to 1 with BJ code. I wonder if H30/31 or 30 pict 2 carb can supply enough fuel for 1679 CC engine or not. What is your opinion? Thanks :)
Hi,
I'm not sure whether the H30/31 would be able to supply enough fuel for a 1679cc engine. I would try it and see. Maybe larger jets would fix that problem if it does arise, or it may work OK... Does Your car accelerate OK with just you in the drivers seat???
My car accelerates very well, and sounds good with extractor exhaust and single muffler out the side. I always use Low gear to start off in.
Lee in Australia
I currently use H30/31 with 1584(1.6) CC on the right bottom angled port for control valve hose; and there is no problem :) I will try and see if H30/31 would be able to supply enough fuel for 1679 with larger jets and share the result here with you. Yes, my car accelerates well when only I am in the car. However, I generally use 1st range during stop and drive on rush hours. Maybe, I should try low gear mostly.
Olgun in Istanbul/Turkey
Yes, Volkswagen in its operating manuals says to use LOW gear when parking or driving up steep driveways. I believe it is a bit dangerous using LOW when parking as it has too much torque, so using Drive one or even drive two is much safer as You don't have all that torque so your car isn't going to take off fast which it can do in LOw Gear when parking., but I have found using LOW gear when taking off is excellent and naturally much faster than D1 & D2.... I presume that is why VW named the gears LOW - DRIVE 1 and DRIVE 2..... BUT YOU ARE LIABLE TO HOLD UP TRAFFIC WHEN STARTING OFF IN D1 OR D2.... Many other owners have also found using LOW gear to take off much better in traffic...
Lee in Australia
Sorry but I have to disagree with this-- in fact, my owner's manual specifically states that typical driving should be limited to Drive 1 and Drive 2, and that Low gear is really only supposed to be used for either towing or pulling/ descending a very steep hill:
(https://www.thesamba.com/vw/archives/manuals/69bug/page20.jpg)
In the 30 years I've been driving this car, I may have used Low gear a total of 20 times. Starting off from a dead stop in Drive 1 is plenty adequate. However I do think there is a misprint in the manual above where it states that Drive 1 can be used from 0-35mph, in fact I have used Drive 1 all the way up to 50 mph with no problems.
yes, it is absolutely misprinted.
Steve, I also wonder your opinion about 1679 cc with the stock carb with larger jets?
Thanks
Sorry i really don't know that much about carb jetting-- I think the largest main jeet I heard of for the 30 PICT / H30/31 carbs was a 125- maybe try that and see. i'm not sure how that affects the other jets though...
I don't think it is a misprint as it is in all autostick manuals. It is what Volkswagen thought at the time. Which I believe was incorrect information...
When parking it is much safer to drive in D1, as in LOW gear Your car can just about climb over another car... HEAPS of Torque... as said I have always driven in LOW GEAR from Traffic lights otherwise You can hold up cars by going too slow... There is a BIG difference between LOW and DRIVE 1. I have told owners on this website for many years and now there are owners using LOW gear without any problems... A local VW trained Mechanic told Me that only one autostick had been sold locally about 1968 and the elderly Lady Owner was told to leave the car in DRIVE 2 so she didn't have to change gears... [Not good information] Owners of manual beetles have been told that autosticks are much slower cars. This is probably correct when only using Drive 1 & Drive 2.... Once LOW is USED to start off, these are one quick car... I've been using LOW gear to take off for 12 years now with no problems... I recommend it...
Lee in Australia
I use Low for starting out if I need to merge with traffic, such as a freeway on ramp. D1 is slower in this instance. Otherwise, I leave in D1 for most normal in town driving. I read the 0-35 as the range for "comfortable" driving as further on it states that you can down shift into D1 at speeds under 55MPH. When merging onto a clogged freeway, I stay in D1 until around 45 before shifting to D2.
As for the leaving it in D2 and driving, many US dealers told their new customers the same thing if they couldn't figure out how to shift at speeds. During slippery winter driving, many times I will leave in D2 to help get started from an extremely slipper start.
If I was on a road with no traffic I would probably use D1 to take off but with a very busy main street [highway traffic] I like to either beat the traffic or get in front of traffic so I use LOW gear.. in back streets with no traffic D1 is fine... or even D2... VW would have been better to have recommended LOW gear to start off with then have D1 & D2 with slightly higher gear ratios... at least D2.... My thoughts.. I wonder what Ratios PORSCHE used as they called the autostick -- PORSCHE SPORTOMATIK.... Autostick was a joint venture with PORSCHE who needed an auto of some kind for their cars in North America...
Lee in Australia
Quote from: 68autobug on 02 April 2018, 12:42
I don't think it is a misprint as it is in all autostick manuals. It is what Volkswagen thought at the time. Which I believe was incorrect information...
When parking it is much safer to drive in D1, as in LOW gear Your car can just about climb over another car... HEAPS of Torque... as said I have always driven in LOW GEAR from Traffic lights otherwise You can hold up cars by going too slow... There is a BIG difference between LOW and DRIVE 1. I have told owners on this website for many years and now there are owners using LOW gear without any problems... A local VW trained Mechanic told Me that only one autostick had been sold locally about 1968 and the elderly Lady Owner was told to leave the car in DRIVE 2 so she didn't have to change gears... [Not good information] Owners of manual beetles have been told that autosticks are much slower cars. This is probably correct when only using Drive 1 & Drive 2.... Once LOW is USED to start off, these are one quick car... I've been using LOW gear to take off for 12 years now with no problems... I recommend it...
Lee in Australia
How many different threads are you going to post this in??
You've made your point.
And the fact that VW engineers NEVER recommended starting off in Low should tell you something about how right you are.
Apologies SB001, Sometimes a car company can get it wrong. They never say that using LOW all the time will damage anything, its just because it is so low a gear they though it better to start off in Drive 1 or Drive 2... Naturally using LOW to start off uses much more fuel than in D1 or D2... So by recommending using LOW gear to start off would have lowered the "normal" MPG figure, which wouldn't have been good publicity... Just My thoughts..
Lee in Australia..