| Name
|
Post |
| Rich Hilgersom
|
Ok, we all know a sportomatic will work with a 6 and probably a 4 but could a late
model tiptronic trans work with a 4 and some custom linkage?
-Rich, drives in silicon valley traffic, Hilgersom |
| Dave_Darling |
That's an interesting question. I don't know if there was an automatic version of the
915 tranny or not. If there was, you might have a chance.
It would not include the cool Tiptronic "shift up" and "shift down"
buttons, though. I remember the introduction of that type of shifting in the 911 (it was
quite a big deal), which was the first Porsche to get that. I remember reading about it in
Pano, which means that it was 1991 or later. And the 911 has used the G-50 tranny since
87.
The only G-50s that I have heard of people trying to put onto 914s are the "short
bellhousing" version that some places make. And I may be wrong on that--it might only
work on early (915-tranny'd) 911s. I would guess (and it's a total guess!) that the short
bellhousing would interfere with the torque converter and necessary "stuff".
You might have better luck finding someone who does custom racing trannies. I'd bet there
is someone out there who'll have something that can be adapted. Be prepared to pay a lot,
though.
If you get something working with an auto in a 914, let us know what and how!!
--DD |
| JP Noonan |
Don't get me wrong, I'm sure a auto 914 would be fine for some people, and I'm sure you
will learn a great deal and gain a sense of pride from completing the conversion but...
WHY!!!
If you want a car with A/C a radio and an automatiiiiii (I can't bring myself to type it)
transmission then find a water cooled Porsche.
I've owned two Corvettes, an 86 and an 89, both had the 4+3 auto. My pick-up (a 93 F-150
Lightning that does 14.6 in the quarter at 4700 lbs. thank you very much) has a 4 speed
electronic auto, but take the gear banger out of my 914 BLASPHEMY!
It may grind a little (usually right when some model is walking down the beach and looks
over at my car), and 2nd and 4th seem to relocate on occation, the clutch burns, etc. but
take the stick out of the 914, then you can take the 914 out of me.
Just my two cents, but whatever floats your boat I guess. Good luck. |
| Brian Mifsud |
Go for it. You may find that certain Audi Transaxles are more suitable than a genuine
Tiptronic. The Audi's are generally set up low horsepower engines (like the 914's).
Adapters will
need to be made, but a used Audi Transaxle is pretty common at any Junkyard so it should
be pretty cheap.
Mr. Noonan......WHY???? do you ALWAYS question peoples MOTIVES????? People are
generally asking for Technical input.....not criticism
hey, I have a suggestion, get ahold of the 914ner you have issue with, and have a beer
or two with him, get drunk and HAVE FUN!!!! |
| JP Noonan |
posted 04-20-98 10:49 AM ET
No criticism just a question.
The Audi idea sounds interesting, the places that make those 914/chevy 350 kits could
probably help.
If the trans work like a domestic auto then you need to think about "step down
linkage" for down shifting and some sort of way for the car to sense it is in drive
but stopped like at a light so it won't stall (it has to increase the idle). This may
limit you to a carb only setup. Also auto trans need coolers. Most stock one are simply a
second core in the radiator. We don't have them so a large trans cooler (like one for
towing) would be needed. |
| Wayne at Pelican
Parts |
*duck*
Whew, almost got hit by that transmission mount being thrown back there...
-Wayne |
| JP Noonan |
Just talked to a 911 friend and....
Tiotronics are real $$$
Also a shop near us put a 3.6 from a tiptronic car into an 88 with a G-50 and the car
became a dog. The one computer is for both tranny and engine i.e. it is waiting for shifts
that aren't there. Plus the number of sensors is mind numbing. So after you buy a trans,
even if you already have one, you're looking at maybe a grand (guess based on what it is
to put a Ford E4OD electric trans in a older F-150) for a custom programed computer and
wiring harness. When ordering a torque converter from any of the high performance
companies out there (B&M, Level 10,T.C.I.) they need to know your h.p., torque, what
cam and induction you have before they can sell a converter. When building an engine the
machinist must know the application first. What I'm saying is the linkage and such are the
least of your problems. Also automatics aren't known to be effecient. Yes electric ones
are better, but the 914 only has 80-100 h.p. to spare, there will be a serious performance
drop.
The Audi idea might work, but the only Audis I've seen (grand total of two, years ago) had
transverse engines. The CV shafts would point toward the front and back of a 914.
My best advice would be to look at VW Transporters (bus). I think that some 411 sedans
also had autos. Another freind put a 914 2.0L in a BUG with a manual BUS tranny. Some
place called Fats,or something,in CA specializes in this kind of work. So if you use a bus
"driveplate" and trans it may work. The 914 case has a hole in the back of it to
allow access to the tourque converter bolts. There is one vaccuum hose that comes from the
tanny (easier then the my preivious mention of kick down linkage). The ring and pinion
carrier (I forgot what Porsche calls them) will have to be reversed. Also some sort of
cable shifter will be needed, but it should not be that hard to make one up from a
domestic car application. I'm not sure but I think VW used a double oil pump in the stock
location. Both driven by the cam but one for engine oil, the other for tranny fluid, most
other autos have their own pump.
Look at Chiltons "Aircooled VW Transporter, Bug,Thing, Ghia ..." book and also
Tom Wilsons "How to Rebuild Your VW Air-Cooled Engine"
As for the comment that we "go have a few beers" look at the time of my first
posting, I was beligerant because I already HAD a few beers!
|
| Brian Mifsud |
Most Audis have LONGITUDINALLY mounted
engines, thats why doing a Quattro is a fairly
simple affair since the driveshaft to the rear wheels
ties in nicely with this arrangement. The AWD system in 911's is the same except
everything is
"backwards". The OLDEST Audis (late 70's, early 80's) were VW's with nicer
interiors and so of course had transverse drivetrains (RABBIT, JETTA, ETC).
Putting any transaxle other than a 901 into a 914 means adapters and custom mounting
hardware
need to be made up, so it is really not a radical departure from the status quo (i.e. 915,
Hewlands, etc.).
Not being an expert on the Audi transaxles, I would think you'd have a more efficient
arrangement with
something designed in the early 80's rather than
a VW Automatic from a 411, 412 etc. The later the
Audi wreck you get, the better. The new Passat (A-4 in drag) has some really nice
transaxle options. If I were to go that far however, I'd ditch the Type 4 altogether and
put in a 911 six, or Water Cooled whatever.
(HALF BAKED VAGUE MEMORY), Somewhere in
my past I read about the very first VW Foxes used
only in BRAZIL. The fox uses the Longitudinal engine arrangment (again vague memories) and
I saw somewhere that the first ones also used the AIRCOOLED Type 1 engine. The Foxes sold
in US where all watercooled, but I wouldn't be surprised if a factory adapter (custom
bellhousing) exists for a Type 1 (and thus Type 4) - to Audi Longitudinal Transaxle. |
| Rich Hilgersom |
Thanks to everyone for the help.. certainly more info than I expected ;-).
I should have mentioned I was putting in a high horsepower type 4. This (I think) would
make the AUDI VW trans option unusable (my '89 golf trans is a dog and the linkages with
their plastic bushings are sloppy)
I think I will continue to reasearch what the heck they put into the sportomatic sixes and
see if it will handle the higher HP.
Thanks again.
Rich Hilgersom |
| Brad Roberts |
Rich,K.E.P out of palmdale california sells the audi adapter,I have dealt with them for
several years,they have been around longer than i have been alive"27years" They
know conversions,let me know if i can help in the conversion..I'm in Mountain View for
some contract work..so I know about "101" traffic.
Brad Roberts "Infosolutions" 650.968.2950 |