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> Anyone tried an aircooled Flat 8, With two fours?
r_towle
post Jan 28 2005, 12:49 PM
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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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BigD9146gt
post Jan 30 2005, 03:19 PM
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QUOTE (Jake Raby @ Jan 28 2005, 01:47 PM)
Nah.... Can't make a statement with a 911 engine!

Plus, they cost too damn much to play with at this level..

I'm using 964 heads though..

Engine will go in a mid engine 1961 VW Single cab truck, under the bed.....

911's cost too much to play with at this level??? (IMG:http://www.914world.com/bbs2/html/emoticons/chairfall.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif)

1) What would two used long blocks go for? $2000?... ya, possibly more, but my friend just picked up a complete 69 911E all original with minimal rust for $1000. Deals are out there if you keep your eyes open, and thats what we're talking about.

2) If you charge $6000 for your base motor, and i was paying you to build a flat 8, you would have to charge $50,000 to even think about braking even. Odds are, if someone is going to be making something of this magnitude, they would't be paying you or anyone else to do it, cause for that price lots of other things could be aquired.

3) Lets think about how the factory made larger motors. The 908 and 917's for example, have very close relations to the 901 engine being over head cams, single heads, etc. Porsche and his crew were very brite, and if they chose a design similar to the 901 for their larger motors, i'm gonna say it wasn't because they listed all the options on the table and played spin the bottle to choose? Think about whats already done? Dry sump, single heads-better flowing, overhead cams, stronger crank, just a better-overall design from the get-go.

4)This is a project for someone who can do all their own work (like you and me).

Jake, i respect your work, but stick to what you know. Last time you were on the 911 bird forum, you started out high and mighty, but had zero answers. If you actually worked with 6's, you wouldn't say what you do about them... and i wouldn't be typing right now.

Again, you are a phenominal VW aircooled 4 cylinder guru.
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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     Jan 28 2005, 05:29 PM
jwalters   http://www.914world.com/bbs2/html/e...   Jan 28 2005, 06:06 PM
Jake Raby   It won't cost a whole lot for me to do it, oth...   Jan 28 2005, 06:10 PM
Mueller   ...   Jan 28 2005, 06:13 PM
jwalters   http://www.914world.com/bbs2/html/e...   Jan 28 2005, 06:28 PM
Bleyseng   screw two motors! put four of them together...   Jan 28 2005, 06:48 PM
redshift   <...   Jan 28 2005, 06:59 PM
Bleyseng   I am hoping to squeeze by with $5000, buying ...   Jan 28 2005, 07:01 PM
Jake Raby   Here it cost 6K for a stock rebuild, but you can a...   Jan 28 2005, 08:16 PM
r_towle   how would you do oiling on the rear engine??? See...   Jan 28 2005, 11:23 PM
Brando   or connect them at the cranks... if you're go...   Jan 29 2005, 05:12 AM
SpecialK   Screw pistons...........someone stick a Huey Turbi...   Jan 29 2005, 05:18 AM
BigD9146gt   http://www.914world.com/bbs2/html/e...   Jan 30 2005, 05:19 PM
r_towle   ok, When if any was the earliest time that an ove...   Jan 30 2005, 06:09 PM
DuckRyder   Thinking out loud: Couldn't you slice one cas...   Jan 30 2005, 06:18 PM
r_towle   <...   Jan 30 2005, 07:21 PM
URY914   Here's what you need...   Jan 30 2005, 08:09 PM
redshift     Jan 30 2005, 08:14 PM
URY914   <...   Jan 30 2005, 08:18 PM
Air_Cooled_Nut  
  Jan 31 2005, 11:23 AM
jwalters   Wonder how the T4 would respond with a crank that...   Jan 31 2005, 02:47 PM
bondo   ...   Jan 31 2005, 02:50 PM
r_towle   yes, but what if you welded up the two motors to b...   Jan 31 2005, 05:28 PM
DuckRyder   ...   Jan 31 2005, 05:45 PM
jwalters   Very nice pic of a Duc!!! I am spankin...   Jan 31 2005, 05:52 PM
DuckRyder   ...   Jan 31 2005, 05:56 PM
JmuRiz   I know were're getting off topic here, but mmm...   Jan 31 2005, 11:06 PM
BigD9146gt   Nathan, I second that! MotoGP sould be great t...   Feb 1 2005, 12:34 PM
Al Meredith   I was out at Chuck Beck house (he lives outside At...   Feb 27 2006, 06:34 PM
Mueller   ...   Feb 27 2006, 07:15 PM
ClayPerrine   How about something like this??? http://www.perr...   Feb 27 2006, 07:51 PM
Mueller   ht...   Feb 27 2006, 08:01 PM
bd1308   i'll see if i can dig up two bus motors.... T...   Feb 27 2006, 08:02 PM
Brian Mifsud   Mike...while your in there pouring aluminum, how a...   Feb 27 2006, 08:22 PM
Brando   ...   Feb 27 2006, 08:54 PM
Brett W   The 180 degree 8 has a problem with second order i...   Feb 27 2006, 08:56 PM
Thorshammer   One of the problems must be the design of a crank ...   Feb 27 2006, 08:58 PM
alpha434   Why we couldn't use a Chevy crank: Counter ba...   Feb 27 2006, 09:03 PM
ClayPerrine   <...   Feb 27 2006, 09:06 PM
alpha434   ...   Feb 27 2006, 09:07 PM
lapuwali   ...   Feb 27 2006, 09:22 PM
Brett W   Sorry I was referring to a 180 degree V8. Don...   Feb 27 2006, 09:23 PM
JmuRiz  

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