S2000 Under The Hood S2000 Technical and Mechanical discussions.

Why is there no production inline-8?

Thread Tools
 
Old 12-22-2003, 05:08 AM
  #11  
gsp
Registered User
 
gsp's Avatar
 
Join Date: Jul 2003
Posts: 367
Likes: 0
Received 0 Likes on 0 Posts
Default

Dusenberg produced them. One of the best cars ever made.
Old 12-23-2003, 04:36 AM
  #12  
Registered User

 
silvershadow's Avatar
 
Join Date: Oct 2002
Location: Scottsdale
Posts: 1,871
Likes: 0
Received 0 Likes on 0 Posts
Default

A million years ago, I saw an inline 8 on some big American car like a Packard (not sure). The owner said the engine was derived from a locomotive engine. He also said the engine was incredibly smooth compared to a V8. But it was a high-torque/low rpm engine.
Old 12-23-2003, 10:54 PM
  #13  
Registered User
 
FormulaRX's Avatar
 
Join Date: Dec 2003
Location: Upland, CA
Posts: 101
Likes: 0
Received 0 Likes on 0 Posts
Default

Yeah the old straight-8 engines in the Packards and Duzenbergs produce very little horsepower but massive amounts of bottom end torque at very low rpms. Even if the inline 8 concept is applied to today's technology, it's very difficult to get it to run smoothly because the extra length of the crankshaft causes it to be less torsionally rigid at high rpms. The inline 6 is about the max you can do an inline configuration and still have it stable under high rpms as can be seen in the M3, Supra, and Skyline engines. Anything past 6 cylinders inline will not be able to reach high rpms that efficiently, however Cadillac has developed a V-16 which is essentially the length of an inline 8 so I guess it may be possible but very impractical seeing the lenth that the car would have to be.
Old 12-24-2003, 06:00 AM
  #14  
Registered User
 
NoTorq's Avatar
 
Join Date: Mar 2002
Location: Rochester
Posts: 756
Likes: 0
Received 0 Likes on 0 Posts
Default

Does anyone remember the Ford T-drive concept? It was an engine/transimission concept from the early 90s that took a straight 8 and had the drivetrain connected to the middle of the crankshaft instead of the end. The engine was mounted transversly with the driveshaft coming straight back (hence the name T-drive). Really cool concept but it obviously didn't go anywhere, it was still pretty tough to fit it in a modern engine bay.
Old 12-26-2003, 03:28 PM
  #15  
Banned
 
horya's Avatar
 
Join Date: Dec 2003
Location: NYC
Posts: 10
Likes: 0
Received 0 Likes on 0 Posts
Default

yeah, as far as saving space, the i8 wouldnt work, as for the w8 and the w12 they were all based on the vr6 motor. the vr6 is not exactly a v the pistons are not alligned with one another, thus making the angle much more acute, and also saving space
Old 12-26-2003, 07:05 PM
  #16  

 
Legal Bill's Avatar
 
Join Date: Oct 2002
Location: Canton, MA
Posts: 34,103
Received 106 Likes on 78 Posts
Default

V configuration advantages:

Shorter block allows shorter body/hood

Torsional rigidity of block and crank is much higher

Slightly opposed cylinders cancel vibration

"tilted" cylinder banks take advantage of "downflow" intake

Shorter crank needs feewer main bearings to maintain low vibration at higher RPM.

Casting "square" block is easier than casting rectanagular block

Short engine is easily positioned to balance weight of car
Old 12-26-2003, 09:16 PM
  #17  
Registered User
 
Windscreen's Avatar
 
Join Date: Jun 2001
Location: Milwaukee
Posts: 390
Likes: 0
Received 1 Like on 1 Post
Default

Originally posted by Daveg27
Does anyone remember the Ford T-drive concept? It was an engine/transimission concept from the early 90s that took a straight 8 and had the drivetrain connected to the middle of the crankshaft instead of the end. The engine was mounted transversly with the driveshaft coming straight back (hence the name T-drive). Really cool concept but it obviously didn't go anywhere, it was still pretty tough to fit it in a modern engine bay.
Some whacky Italians attempted a T-drive with a couple Ferrari V-8's in the late 80's. They called the engine the V16T. It was designed to go into a supercar called the Cizeta Moroder. I'm not sure if they ever actually sold any, but I thought the concept was pretty cool, if not a bit wide.
http://www.fast-autos.net/cizeta/cizetamoroder.html
http://www.giorgiomorodergallery.com/morod...der/cizeta.html

Steve
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
ianl
UK & Ireland S2000 Community
14
04-04-2003 03:46 PM
Wisconsin S2k
S2000 Talk
8
02-02-2003 08:52 PM
SiK182
S2000 Talk
27
10-13-2002 08:03 PM
ricosuave
S2000 Talk
7
06-03-2001 09:15 PM
stookster
S2000 Talk
7
04-04-2001 07:22 AM



Quick Reply: Why is there no production inline-8?



All times are GMT -8. The time now is 01:26 PM.