NEWBIE WITH Q's, getting a 914 and need some help |
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NEWBIE WITH Q's, getting a 914 and need some help |
bangingears |
May 23 2008, 02:27 AM
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#1
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Newbie Group: Members Posts: 8 Joined: 23-May 08 From: anaheim Member No.: 9,091 Region Association: Southwest Region |
Hello, My names Adam, for years I have wanted a 914 and, low and behold I believe this is the year ill be getting one! I know I want a street legal go cart, I have several years of experience building type 1 motors, and this is why i chose this car (similarity...however more ?'s on that later)..... i figure for suspension I am going to do the following
Front sway bar Koni sport shocks with rubber bump stops Rebel racing rear coil overs Tangerine racing chassis stiffin kit and build a full cage for Chassis Rigidity. here is where I feel alittle out of the loop.... i did alot of research and from 3 different machine shops, recieved three different answers.... one... said all 1.7 1.8 and 2.0 cases are the SAME...and interchange parts (i know they are wrong... the bore size on each case is different) second said, the cases are the same, however the 1.7 and 1.8 ONLY need cylinder bore inlarged... and the third said all 3 cases where different. So wats the real answer???? And FInally.... where do you guys go for performance parts? I.E, counterweight cranks, rods, pistons, valves? Porting? ... whats the best performance shop to go to? Please if you can help at all please share your opinion. thank you! |
r_towle |
May 23 2008, 04:23 AM
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#2
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Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
The 914 motor came in three sizes.
the 2.0 liter has a 71mm stroked crankshaft. the 1.8 liter and 1.7 liter have a 66mm crankshaft. The outer dimension of the cylinders for each 1.7, 1.8, and 2.0 liter are all the same size. No case machine work is needed for stock cylinder swaps. Because the crank sizes are different, the pin height on the 1.7 and 1.8 liter pistons is different than the 2.0 liter pistons. The rod length is also different. You can take the internals, 2.0 liter crank, rods, pistons, and cylinders and put them into any of the three cases and they will fit. You need to match the proper pin height, with the piston and crank to have the correct geometry in the motor. Many of the standard vendors will have parts. Engines Raby's aircooled technologies. FAT performance Camshafts Web Cam Elgin camshafts Crankshafts DPR Machine work HAM (hoffman machining) Headflow masters Rimco You will find pistons and cylinder sets, along with crankshafts on ebay frequently from a specific vendor called AA. These are cheaper than most parts out there, but may have tolerance issues and not match in size. These are usable provided the vendor has a return policy and allows you to go through the process of swapping one piston and cylinder at a time until you have a complete set that are within spec. Good luck, keep asking questions. There are a several other forums that have alot of data. Forums Shop Talk Forums (STF) Jake Raby forums (aircooled technology) Pelican Parts forum A great read all about type 4 motors, and alot of technical data. http://www.tunacan.net/t4/ You will recieve many opinions on engine designs, but you should start your search with the end purpose of the car in mind..what do you want to do with the car (besides build it) because that will really drive your engine design and transmission design to allow you to really succeed. Rich |
Carlitos Way |
May 23 2008, 12:39 PM
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#3
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I did it MY WAY Group: Members Posts: 1,337 Joined: 14-September 04 From: Simi Valley, CA Member No.: 2,757 Region Association: Southern California |
I think you just about covered it all!
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davep |
May 23 2008, 12:55 PM
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#4
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914 Historian Group: Benefactors Posts: 5,143 Joined: 13-October 03 From: Burford, ON, N0E 1A0 Member No.: 1,244 Region Association: Canada |
The case registers for the cylinders are the same. The 1.7 heads have a smaller cylinder register than the 1.8 & 2.0 heads. Essentially, all 914/4 engine cases are fully interchangeable. Very early cases for the 1.7 did not have internal ribs for the windage tray. I know the 2.0 cases have smaller supports under the cylinder registers, but I don't know if this applies to the 1.7 & 1.8 cases built at the same time. This makes no difference in how the case can be used.
Oh yeah, Jake @ Air Cooled Technology can provide a solution for your requirements. His parts are designed to be compatible with the other parts. |
bangingears |
May 23 2008, 03:44 PM
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#5
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Newbie Group: Members Posts: 8 Joined: 23-May 08 From: anaheim Member No.: 9,091 Region Association: Southwest Region |
thanks guys.. i am stoked on this project! i have build several 160hp t1's in the same size range 1900cc-2110, i figure a 2056 will provide me with enough power.
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bangingears |
May 24 2008, 02:07 PM
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#6
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Newbie Group: Members Posts: 8 Joined: 23-May 08 From: anaheim Member No.: 9,091 Region Association: Southwest Region |
what size webers are all you guys running? ik now i use to run 48 IDA's on agressive camed bugs... what do you guys recommend
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Gint |
May 24 2008, 05:04 PM
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#7
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Mike Ginter Group: Admin Posts: 16,075 Joined: 26-December 02 From: Denver CO. Member No.: 20 Region Association: Rocky Mountains |
Looks like most of it's been covered. Except this... (IMG:style_emoticons/default/welcome.png)
Any TypeIV under 2056 doesn't need more than a set of 40IDF's. Generally speaking anyway... Buy a 914 yet? Wait until you can get in and rip around in it whenever you want. (IMG:style_emoticons/default/driving.gif) |
bangingears |
May 25 2008, 02:24 AM
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#8
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Newbie Group: Members Posts: 8 Joined: 23-May 08 From: anaheim Member No.: 9,091 Region Association: Southwest Region |
I am selling my full built race bike and getting one asap... i also like the fact some guys are gettin 20mpg LOL WOHOOO,t hanks for all the help!!!!!!!!!!!
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dw914er |
May 25 2008, 04:23 AM
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#9
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Planning Cities Group: Members Posts: 2,364 Joined: 1-March 08 From: Yucaipa, CA Member No.: 8,763 Region Association: Southern California |
I am selling my full built race bike and getting one asap... i also like the fact some guys are gettin 20mpg LOL WOHOOO,t hanks for all the help!!!!!!!!!!! 29 according to porsche (IMG:style_emoticons/default/biggrin.gif) |
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