Has anyone ever made a 914/8 clone?, Or am I off my rocker? |
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Has anyone ever made a 914/8 clone?, Or am I off my rocker? |
Mikey914 |
Jan 16 2020, 10:09 AM
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#1
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The rubber man Group: Members Posts: 12,661 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
I have seen a few tribute GT cars that are great, but you all know me. I really love doing the obscure.
I have access to some aircraft cases and was thinking about taking 2 IO540s and adding another bank of pistons to one. Yes machining the cases, welding it all up and same with the crank. Wouldn't be cheap, or easy. But if I could make the motor, I could do the rest. Anyone know what the displacement was ? Or any other specs Attached image(s) |
rick 918-S |
Jan 18 2020, 07:48 AM
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#2
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Hey nice rack! -Celette Group: Members Posts: 20,456 Joined: 30-December 02 From: Now in Superior WI Member No.: 43 Region Association: Northstar Region |
I really like that IO-720 but the price (IMG:style_emoticons/default/yikes.gif)
You would still need to shorten the stroke to increase.the RPM range. Welding a Porsche case would be way cheaper. You could use the 720 crank throw positioning as the start to have a crank machined. Same with the cam lobe positioning. The case is the easy part. It's the crank and cam that pose the challenge. |
ClayPerrine |
Jan 18 2020, 05:00 PM
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#3
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Life's been good to me so far..... Group: Admin Posts: 15,462 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
I really like that IO-720 but the price (IMG:style_emoticons/default/yikes.gif) You would still need to shorten the stroke to increase.the RPM range. Welding a Porsche case would be way cheaper. You could use the 720 crank throw positioning as the start to have a crank machined. Same with the cam lobe positioning. The case is the easy part. It's the crank and cam that pose the challenge. Rick, I disagree.... the crank would be the easy part, just time consuming. Get a bunch of 911 cranks, and machine them into pieces that can be bolted together to make any firing order you want. I would use the late 908 firing order. The early one had problems with third order harmonics. The cases would be harder. You have to cut two cases and weld the two half cases together. You need to put little alignment sleeves in all the oil galleries to keep them aligned. And you have to use 3.0 SC cases or newer to make them. Welding magnesium cases frightens me. You also have to extend the cam carriers like you did for the case. Then, to make the cams, you get two pairs, of cams, cut up into pieces. Assemble and time the front lobes, then add the next one back, time it, and tack weld it. Do the same until each cylinder is timed, and the cam is tack welded. Pull it apart, then finish weld the cams, or send them off to be duplicated as a solid cam. Sounds easy. (IMG:style_emoticons/default/av-943.gif) |
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