 Anyone tried an aircooled Flat 8, With two fours? |
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| r_towle |
 Jan 28 2005, 12:49 PM
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Custom Member  Group: Members Posts: 24,658 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States 
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Has anyone tried to build a flat 8 with two type 4 motors?
Theoretical questions. Assumptions 2 motors each producing 100 HP and 100 Lb/ft of Torque The motors are end to end, front to rear. The cranks are fastened together either bolted or welded. 1) Would you get 200hp and 200 lb/ft or torque? or is there some multiplier...seems like you would produce more torque.. 2) could it be done with a single ignition system available for sale off the shelf. 3) could you do it without two distributors? crank fired ignition system..I am thinking that there could be a wheel placed in between the motors to give you something to time from. 4) I am assuming either a nice FI system, or four carbs. Has anyone done this? I would like to see some articles or web pages if this has been done in the aircooled world... Thanx in advance Rich |
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| Thorshammer |
Feb 27 2006, 08:58 PM
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Senior Member Group: Members Posts: 749 Joined: 11-November 03 Member No.: 1,335 |
One of the problems must be the design of a crank that does not extend the overall length of the engine by too much. This could be a major problem. It will probably have to use rods that are adjacent to each other liek a small block to keep the cylinder bore spacing decent. As for the previous comment about bevel drive gear Carrera engines needing 40 hours to build. Yes that is true, if they are a new parts build up. However, if the time is taken upon disassembly to check tolerances and shims are kept in the proper order, then it is less than that. many Carrera Maestros (HA, HA, HA) keep the black art thing going to ensure no one else plays with them. Ensuring they have a place from now forth. But the main issue with 4 cam engines is parts availability or the ability to make some part that are NLA. This is the real issue. and thats why only two guys in the country do most of the 4 cam work. its either MT or CT, anything else is just a myth. (IMG:http://www.914world.com/bbs2/html/emoticons/unsure.gif) If you can work on a bevel drive Ducati, you can work on a carrera 4 cam. BTW, why not make the V8 Type four monster use some Ducati Desmo air cooled cylinder heads. I have built many of those engines, the best we ever got in 750cc form was about 90-92 hp depending on the day. Which would mean 225 hp or so from 2.0 liters and 450 from 4.0 liters. Just a thought. Erik Madsen |
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Posts in this topic
r_towle Anyone tried an aircooled Flat 8 Jan 28 2005, 12:49 PM
Mueller yep, a few have been done........I know I've p... Jan 28 2005, 01:03 PM sanman I thought of it but I think it would be
too lo... Jan 28 2005, 01:05 PM r_towle i was hoping you would answer...you always think o... Jan 28 2005, 01:05 PM andys It's been done both ways. I saw a pic years ag... Jan 28 2005, 01:08 PM r_towle honestly cooling seems like a simple part of it ..... Jan 28 2005, 01:14 PM Cloudbuster Double displacement does not usually equal double ... Jan 28 2005, 01:22 PM nebreitling i would think that you could never get double the ... Jan 28 2005, 01:36 PM Jake Raby Already have a print in with moldex on the crank.
... Jan 28 2005, 01:59 PM synthesisdv asked the same question a while back....
here... Jan 28 2005, 02:19 PM Cloudbuster Hans Dahlbeck? Isn't he the brain donor in ... Jan 28 2005, 02:23 PM synthesisdv 