gemellocattivo.com

Which means "Evil Twin". Lets see your projects where you change boring into fun or create the fun from scratch.
It is currently Thu Mar 28, 2024 5:14 am

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 21 posts ]  Go to page Previous  1, 2, 3  Next
Author Message
PostPosted: Sun Oct 06, 2019 6:33 pm 
Offline

Joined: Sat Jan 03, 2015 5:40 am
Posts: 208
I remember something about a big bore 4 cyl Honda that was built to comply with the 4 cylinder requirement. The ring pack on that thing must have been really unique.


Top
 Profile Send private message  
 
PostPosted: Sun Oct 06, 2019 6:46 pm 
Offline

Joined: Thu Jan 01, 2015 6:47 pm
Posts: 4250
Here it is:
https://en.m.wikipedia.org/wiki/Honda_NR

A 120 degree v12 is effectively the same idea


Top
 Profile Send private message  
 
PostPosted: Mon Oct 07, 2019 11:38 am 
Offline

Joined: Tue Jan 06, 2015 8:09 am
Posts: 420
You guys are making my brain hurt, it's a good brain but I am careful not to kill it. :shock:

_________________
Wade Williams
Master Ferrari Tech
Restoration Tech
Engine Machinist
Fabricator
Racecar Driver


Top
 Profile Send private message  
 
PostPosted: Mon Oct 07, 2019 12:15 pm 
Offline

Joined: Sat Jan 03, 2015 5:40 am
Posts: 208
FoaTech wrote:
You guys are making my brain hurt, it's a good brain but I am careful not to kill it. :shock:


My head hurts too this morning, however it might have more to do with the bottle of Cab I polished off last night.

Still trying to figure out how Honda did the rings on those oval pistons.....


Top
 Profile Send private message  
 
PostPosted: Mon Oct 07, 2019 4:44 pm 
Offline

Joined: Sat Jan 03, 2015 10:13 pm
Posts: 794
Is the Testarossa engine a boxer 12 or 180 degree V12?


Top
 Profile Send private message  
 
PostPosted: Mon Oct 07, 2019 7:00 pm 
Offline

Joined: Thu Jan 01, 2015 6:47 pm
Posts: 4250
TheDarkSideOfWill wrote:
Is the Testarossa engine a boxer 12 or 180 degree V12?


Yup, it sure is.


https://www.youtube.com/watch?v=LOILZ_D3aRg


Top
 Profile Send private message  
 
PostPosted: Tue Oct 08, 2019 6:37 am 
Offline

Joined: Tue Jan 06, 2015 8:09 am
Posts: 420
cribbj wrote:
FoaTech wrote:
You guys are making my brain hurt, it's a good brain but I am careful not to kill it. :shock:


My head hurts too this morning, however it might have more to do with the bottle of Cab I polished off last night.

Still trying to figure out how Honda did the rings on those oval pistons.....


Yeeaaaahhhhhh, Uhmmmm, no. I am just stopping on that one. :roll:

_________________
Wade Williams
Master Ferrari Tech
Restoration Tech
Engine Machinist
Fabricator
Racecar Driver


Top
 Profile Send private message  
 
PostPosted: Tue Oct 08, 2019 9:54 pm 
Offline

Joined: Sat Jan 03, 2015 10:13 pm
Posts: 794
mk e wrote:
TheDarkSideOfWill wrote:
Is the Testarossa engine a boxer 12 or 180 degree V12?


Yup, it sure is.


https://www.youtube.com/watch?v=LOILZ_D3aRg


Which is it?

Not so sure that's the video you meant to link...


Top
 Profile Send private message  
 
PostPosted: Wed Oct 09, 2019 5:15 am 
Offline

Joined: Thu Jan 01, 2015 6:47 pm
Posts: 4250
mk e wrote:
TheDarkSideOfWill wrote:


Which is it?

Not so sure that's the video you meant to link...


The 2 names mean the same thing so the answer is "yes", which was the point of the video.

The word V normally implies an angle less than 180 and at 180 it becomes a "boxer"...but its still a 2 bank engine with the angle between the banks 180, so 180 V12 is still correct in my view. I think when you say boxer I think split cases vs a V engine where I think single block....it doesn't have to be that way and I don't think there is any clear definition that dictates 1 name or the other.

When I started building the frankenferrari I used to joke I assumed the ferrari engineers were as lazy as me so when they were asked to make a flat 12 (see that, yet another name for the same thing) they pulled the V12 drawing, crossed out 60, wrote 180 and sent it to the shop so I expected the parts to interchange....I knew BB or TR head do fit a 308 block but I didn't realize all 3 were a newer design topend and not back compatible :(


Top
 Profile Send private message  
 
PostPosted: Wed Oct 09, 2019 9:17 am 
Offline

Joined: Sat Jan 03, 2015 10:13 pm
Posts: 794
A boxer has 180 degree split crank throws... a 180 degree V doesn't.

Image

So in the search, I found the article that graphic came from:

https://jalopnik.com/its-time-you-knew- ... 1825246413

He claims the Ferrari is a 180 V, not a boxer... the Berlinetta Boxer doesn't have a boxer engine. Funky. He also says the Porsche flat 12 in the 917 wasn't a boxer either. I guess since a 2 bank 12 will have perfect primary balance no matter what the bank angle is, there's no advantage to the extra complexity of a boxer.

https://en.wikipedia.org/wiki/Flat_engine

Subaru (and I assume Porsche) happens to throw main bearings in between paired cylinders, but each pair has pins that are 180 degrees out from each other. This wouldn't be the case on a 180 degree V. I think VW's only have three mains, so they're in the split crank throw category.

ETA: switched to a better graphic


Top
 Profile Send private message  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 21 posts ]  Go to page Previous  1, 2, 3  Next

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 7 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB® Forum Software © phpBB Group