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736- I know kennedy makes the components very cheap for this kind of swap--not much to it--I am REALLY thinking about this. |
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What you think???? |
QUOTE (Mueller @ Jan 21 2005, 06:30 PM) | ||
sounds like a good idea if it works, there must be a reason we do not see this done more often??? at least here in our PCA region, the VW transmission would not be allowed in time trials (at least not in a specific class if someone complained)....you could run it in auto-x, but only in the exhibition class.... |
QUOTE (Special_K @ Jan 21 2005, 09:36 PM) | ||||
Leave the 914 shift knob on as a decoy |
QUOTE (Aaron Cox @ Jan 21 2005, 10:07 PM) |
BUT....they are still 4 speeds berg 5 speed trans anyone? |
QUOTE (jwalters @ Jan 21 2005, 08:15 PM) | ||
The berg is wayyy to much money- -and with all the gear ratio and final drive ratio choices for cheap the 4spd will outgun the 5----excellant first--close second and third--with a nice overdrive fourth--get the right ratios and match the tire diameter accordingly..... 4spds are not all bad--the 930's came stock with them---- |
QUOTE (bondo @ Jan 21 2005, 10:13 PM) |
Wow, I'm intrigued. How much HP and torque are you gonna bolt to it? I'm definitely gonna watch and see what happens. |
QUOTE (Aaron Cox @ Jan 21 2005, 11:27 PM) | ||||
930's had a ton more HP too |
QUOTE (bondo @ Jan 22 2005, 12:13 AM) |
Wow, I'm intrigued. How much HP and torque are you gonna bolt to it? I'm definitely gonna watch and see what happens. |
QUOTE (andys @ Jan 22 2005, 12:58 AM) |
What are each of the "net" ratios (1 thru 4 x final drive ratio)? I seem to recall that you can't get a tall enough 4th/R&P combo, as most applications are either for very tall tires and/or drag race applications. Can you point me to info on available ratio's that would perhaps suit higher HP motors? You will need about a 3.00:1 "net" ratio or better. The 901 is 3.14:1, a 915 is 2.94:1, and a 944T (016R) is 2.80:1..........Thanks, Andy |
QUOTE (jwalters @ Jan 21 2005, 10:13 PM) |
[/QUOTE] yea thats easy--go to CB's website--they do tranny's too and list all the gearsets and final drives-----basically if you want a 3.88 R&P AND a stockish .85 fourth--you can have 1500 rpms at 70 mph--the ratios are mind boggling--the T1 guys have something close to 200+ different combos and each gear is about 35-75 bucks!!! You simply tell them your tire diameter and what kind of driving you do and what you expect and all the T1 tanny people take it from there.... Also look at rancho transaxles--they are one of the T1 industries leaders---there is another one made called a Mendeola 4 spd--this is good for 800 hp $$$$ About 3 years ago hot vws mag came out with an issue listing all the T1 hipo trannies and the makers--ungodly!!! Whatever you want--you can have...... |
QUOTE (andys @ Jan 22 2005, 01:29 AM) | ||
That 3.88 R&P and 0.85 4th is not nearly tall enough for the tires you'd run on a 914. I know there's a ton of ratio's for sure, but I don't recall seeing anything in a suitable range for a 914. The beauty of this trans, are the incredibly cheap prices. Parts are everywhere!! Andy |
QUOTE (andys @ Jan 22 2005, 12:58 AM) |
What are each of the "net" ratios (1 thru 4 x final drive ratio)? I seem to recall that you can't get a tall enough 4th/R&P combo, as most applications are either for very tall tires and/or drag race applications. Can you point me to info on available ratio's that would perhaps suit higher HP motors? You will need about a 3.00:1 "net" ratio or better. The 901 is 3.14:1, a 915 is 2.94:1, and a 944T (016R) is 2.80:1..........Thanks, Andy |
QUOTE (TC/914 @ Jan 22 2005, 09:57 AM) |
I just had RANCHO build a type I swing axle trans for my 356 coupe for all of the same reasons quoted here. Cost and performance being most important. The trans has all of the go-fast goodies installed plus a combination of type I and II gears for an overdrive fourth WAY beyond their freeway-flyer version. I thought that the shape of the 356 could handle and deserved the higher top speed that a VW trans would offer. I have an IRS VW (TransForm) freeway-flyer trans in the cellar, now it's definately going into the 914. THANKS for the push . . . !! TC |
QUOTE (jwalters @ Jan 22 2005, 12:40 AM) |
[/QUOTE] The true net ratio of any trans is 1:1-however, none are made to this standard, therre would be no torque mulitplication-I believe you are referring to the first gear ratio in the tranny minus the final drive, if not, clarify. |
QUOTE (TC/914 @ Jan 21 2005, 05:07 PM) |
I'll tell you what I think if you PM me as to where that great avatar came from! Swapping a type one trans would be pretty easy and has been already thought out by the mid engine sand buggy boys. A quick visit to http://shoptalkforums.com/ or http://www.thesamba.com/vw/forum/ will answer all of your parts matching questions regarding brackets, shifter, etc. along with which starter will fit the type one trans and which flywheel will need to be used on your engine. I would suspect a 70 flywheel with a semi-automatic VW Bug starter will do the trick. Otherwise, just talk with the folks at RANCHO and describe what you want. Everything else is pretty much a bolt it. Good luck with a cool idea! TC |
QUOTE (jwalters @ Jan 23 2005, 05:55 AM) |
Andys---I do admit I have not done this kind of math in a long time, and I do not have my cheat book auto math in front of me--but to kinda look at this from the other side of the coin: Lets say that high gear is 1:1 + a 4.429:1 R&P , net ratio = 4.429 A .71 and .84 high gear is less than one--we are taking away--hence, subtraction, I do remember that much from the pre algebra course I took ( I am not a mathematician, and do not claim to be, I use cheat sheets all the time) [Edited] |
QUOTE (jwalters @ Jan 23 2005, 09:02 AM) |
Yea well the buggie guys are more interested in trannies other than the 901----- but you do have to change the input shaft bearing--the T1 tranny snout is a larger diameter than the 901?? I know a 200 mm disc will run fine in the 215 flywheel and plate...and the linkage is still a pull, like the 901, and a quick check will show the pulley and mount will bolt up to the side case like the 901. Mounting the trans to the 914 chassis is super easy--a pair of mild steel elephant ears bolted to the shift cap perimeter with extended studs , and with a section bent to the proper angle to mate to the rubber mounts is a brake press and plate bender away...too easy to do---and my cv output shafts bolt right up to the T1, so no changing components there- I just want to do away with a red herring---I have 3 901's that all need work--and again, for the price of a set of synchros---------------------------- BTW- has anybody ever noticed that the 901 says VW on it??? |
QUOTE (Tom Perso @ Jan 24 2005, 01:25 PM) |
The diameter of all the input shafts (that we are talking about) are the same. It's the lenght. The T1 has the shortest, therefor, the bearing needs to ride in the flywheel. The other input shafts require bearings that ride in the crankshaft. Later, Tom |
QUOTE (Cap'n Krusty @ Jan 24 2005, 01:52 PM) |
The Porsche made gears have matching numbers imprinted on them, the VW made gears don't. |
QUOTE (Tom Perso @ Jan 24 2005, 04:25 PM) |
The diameter of all the input shafts (that we are talking about) are the same. It's the lenght. The T1 has the shortest, therefor, the bearing needs to ride in the flywheel. The other input shafts require bearings that ride in the crankshaft. Later, Tom |
QUOTE (Tom Perso @ Jan 24 2005, 09:15 PM) |
Cap'n - Yes, we are agreeing. Sorry I didn't read thru your whole post. jwalters - The bearing sits flush with the flywheel and actually sticks a shade into the crankshaft. If there is an existing bearing in the crank, you need to remove it. Later, Tom |