Merry Christmas and welcome to Packard Motor Car Information! If you're new here, please register for a free account.  
Login
Username:

Password:

Remember me



Lost Password?

Register now!
FAQ's
Main Menu
Recent Forum Topics
Who is Online
84 user(s) are online (76 user(s) are browsing Forums)

Members: 2
Guests: 82

Ozstatman, kevinpackard, more...
Helping out...
PackardInfo is a free resource for Packard Owners that is completely supported by user donations. If you can help out, that would be great!

Donate via PayPal
Video Content
Visit PackardInfo.com YouTube Playlist

Donate via PayPal



(1) 2 »

Do you know how fast your 8th Series engine is turning?
#1
Forum Ambassador
Forum Ambassador

Ozstatman
See User information
While over at Harvey's this morning he pulled out a Packard dealer repair book which contained this interesting table equating engine rpm's with mph for various 8th Series cars. Wonder how many owners got their Packards up to 90mph?

NOTE - I am arranging to borrow the book, once Harvey finds some missing pages, and I'll have it scanned and loaded in the Packard Literature and Manuals section.

Click on pic for a larger image.

Attach file:



jpg  (28.21 KB)
226_4b0b7c894b7bc.jpg 640X480 px

Posted on: 2009/11/24 1:29
Mal
/o[]o\
====

Bowral, Southern Highlands of NSW, Australia
"Out of chaos comes order" - Nietzsche.

1938 Eight Touring Sedan - SOLD

1941 One-Twenty Club Coupe - SOLD

1948 Super Eight Limo, chassis RHD - SOLD

1950 Eight Touring Sedan - SOLD

What's this?
Put your Packard in the Packard Vehicle Registry!
Here's how!
Any questions - PM or email me at ozstatman@gmail.com
 Top  Print   
 


Re: Do you know how fast your 8th Series engine is turning?
#2
Forum Ambassador
Forum Ambassador

Owen_Dyneto
See User information
Oh God! I only hope your posting that doesn't bring Twunk Rack back in here for another diatribe and round of bashing over babbitt bearings and rear axle ratios.

Posted on: 2009/11/24 9:19
 Top  Print   
 


Re: Do you know how fast your 8th Series engine is turning?
#3
Forum Ambassador
Forum Ambassador

Dave Kenney
See User information
I can't imagine running my '47 356 engine up to 4400RPM much less a prewar babbit bearing engine. I don't imagine the bearings would last very long at that speed supposing it could reach that RPM pushing a 5000lb Packard.

Posted on: 2009/11/24 12:05
______________________________________________
Dave
 Top  Print   
 


Re: Do you know how fast your 8th Series engine is turning?
#4
Home away from home
Home away from home

JWL
See User information
This gives me an idea. I may hook-up a tachometer to my 115C and take it for a drive, noting RPM at different speeds. I believe my car has a 4.69:1 differential ratio.

Posted on: 2009/11/24 15:07
We move toward
And make happen
What occupies our mind... (W. Scherer)
 Top  Print   
 


Re: Do you know how fast your 8th Series engine is turning?
#5
Forum Ambassador
Forum Ambassador

Dave Kenney
See User information
John, It would be an interesting test. I would love to have a tach on my 47 to see what the engine is turning at various speeds.

Posted on: 2009/11/24 15:16
______________________________________________
Dave
 Top  Print   
 


Re: Do you know how fast your 8th Series engine is turning?
#6
Home away from home
Home away from home

JWL
See User information
Quote:

clipper47 wrote:
John, It would be an interesting test. I would love to have a tach on my 47 to see what the engine is turning at various speeds.


Yes, it would - in and out of overdrive.

Posted on: 2009/11/24 15:27
We move toward
And make happen
What occupies our mind... (W. Scherer)
 Top  Print   
 


Re: Do you know how fast your 8th Series engine is turning?
#7
Forum Ambassador
Forum Ambassador

Owen_Dyneto
See User information
Guys, if you know your differential ratio and measure your tire circumference or know the diameter (published data in most tire catalogs), you can very simply calculate the rpm in high gear for any speed. And if you have OD and know the gear reduction, it's equally simple. The only aspect of the calculation subject to a bit of error is the fact that the tires under load deform a bit and the circumference measurement made under a static condition may not be the same as under a dynamic condition.

Posted on: 2009/11/24 15:28
 Top  Print   
 


Re: Do you know how fast your 8th Series engine is turning?
#8
Forum Ambassador
Forum Ambassador

Ozstatman
See User information
Wade told me that some years ago he had a tacho on Old Blue, '37 120, and that at about 50mph it was turning at just under 2,000rpm.

Posted on: 2009/11/24 15:38
Mal
/o[]o\
====

Bowral, Southern Highlands of NSW, Australia
"Out of chaos comes order" - Nietzsche.

1938 Eight Touring Sedan - SOLD

1941 One-Twenty Club Coupe - SOLD

1948 Super Eight Limo, chassis RHD - SOLD

1950 Eight Touring Sedan - SOLD

What's this?
Put your Packard in the Packard Vehicle Registry!
Here's how!
Any questions - PM or email me at ozstatman@gmail.com
 Top  Print   
 


Re: Do you know how fast your 8th Series engine is turning?
#9
Forum Ambassador
Forum Ambassador

Owen_Dyneto
See User information
John, It would be an interesting test. I would love to have a tach on my 47 to see what the engine is turning at various speeds.

Dave, if I remember correctly, my 48 Custom 8 with OD and G-78x15 tires turned either just over or just under 2000 rpm at 65 mph. Same driveline as your car. I have no reason to believe my speedometer had any greater or lesser accuracy than typical (+/- 3-6%).

Posted on: 2009/11/24 15:57
 Top  Print   
 


Re: Do you know how fast your 8th Series engine is turning?
#10
Forum Ambassador
Forum Ambassador

Dave Kenney
See User information
Quote:

Owen_Dyneto wrote:

Dave, if I remember correctly, my 48 Custom 8 with OD and G-78x15 tires turned either just over or just under 2000 rpm at 65 mph. Same driveline as your car. I have no reason to believe my speedometer had any greater or lesser accuracy than typical (+/- 3-6%).

If I could get it to rev to 4000 It would be doing 130MPH!
Dave, I had G78's on my car and because the wheel diameter was smaller than the 700-15's which the car originaly came with by about 2" I figured that at 60 mph the speedo was optimistic by about 10-15%.

Posted on: 2009/11/24 16:20
______________________________________________
Dave
 Top  Print   
 




(1) 2 »





- The following Google Ad-Sense Advert helps fund the cost of providing this free resource -
- Logged in users will not see these. Please Join and Donate to help support the website -
Search
Recent Photos
Photo of the Day
Recent Registry
Upcoming Events
Website Comments or Questions?? Click Here Copyright 2006-2024, PackardInfo.com All Rights Reserved