Engine question!! - Page 2 - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #16 (permalink)  
Old 08-26-2010, 05:20 PM
Dirty Biker's Avatar
Bold As Love
 
Last photo:
Join Date: Aug 2010
Location: In my van, down by the river.
Age: 38
Posts: 378
Wiki Edits: 0

Thanks: 1
Thanked 0 Times in 0 Posts
I think a motor with a short stroke, a conservative cam, and long rods is the best. Some disagree and say big stroke and low rpm and overdrive. According to dodge-wiki there was a rambler that got 51.2 mpg in a pretty good sized car wayyy back in 1960.

http://www.dodge-wiki.com/wiki/Rambler_American#Economy

The motor was an inline six and had a short stroke and long rods. I bet it had a good amount of compression. But yeah honda does a thing with a pre combustion chamber that they call a "lean burn" head or something. There is also a guy that claims great mileage from hot air, preheating the intake charge.
Smokey Yunick! http://www.legendarycollectorcars.co...clusive-video/

still only 51 mpg, and a smaller car too. The AMC is not too bad for 1960 tho!

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #17 (permalink)  
Old 08-26-2010, 07:28 PM
Registered User
 
Last photo:
Join Date: May 2006
Location: Jax Fl
Posts: 383
Wiki Edits: 0

Thanks: 16
Thanked 4 Times in 2 Posts
Quote:
Originally Posted by cobalt327
But man, the EMISSIONS!!
Yeah but the emissions are biodegradable!
Reply With Quote Quick reply to this message
  #18 (permalink)  
Old 08-27-2010, 08:13 AM
BigRoy1978's Avatar
Registered User
 
Last photo:
Join Date: Nov 2009
Location: Hugoton, KS
Age: 25
Posts: 338
Wiki Edits: 0

Thanks: 4
Thanked 0 Times in 0 Posts
yeah, but that Rambler was built to get MPG. They did a whole mess of work to that car to get those numbers, including disabling 1st gear on take offs, so it would pull through second and not rev up as high.

I say! 5.8 liter 12 valve Cummins, like what dodge put in the 90's trucks. We tuned one in tech school to get something like 45-48 mpg. Then we could just adjust the fuel curve, injection timing and pressure and get nearly 1000 horsepower, with one turbo. We had it near 45-50 pounds of boost with the stock turbo, but i wasnt there to see the numbers when they put twins on it.

Or! if we are talking mpg, medium sized engine...say a 327, with a really nice combustion chamber/piston design, gobs of compression, and then run it into a 700r4, with an overdrive unit on the back of it, with something like a 3.08/2.80 something gear. then take that and put in a low/light/streamline car, lets say a 77-81 F-body! You could cruise at 150 mph, and get something like 30 mpg! No, it would accelerate as nasty as one would want, but damn, it would top at at something like...hold on ill do the math. 461 mph! minus wind/bug/space time contineum resistance, and i bet it would realistically do 220-230!

I had another senario...but ill stop there.
Reply With Quote Quick reply to this message
  #19 (permalink)  
Old 09-04-2010, 07:21 AM
farna's Avatar
Member
 
Last wiki edit: AMC V-8s Last photo:
Join Date: Sep 2002
Location: Batesburg-Leesville, SC
Age: 52
Posts: 1,636
Wiki Edits: 14

Thanks: 0
Thanked 15 Times in 14 Posts
The Ramblers had to be certified stock for the economy runs, that's one reason NASCAR supervised everything. They weren't powered by short stroke engines, most of the high mileage cars used the old 195.6 L-head ( Americans only, the bigger Ramblers used the 195.6 OHV) like Martinsr built for his 60 American. First gear wasn't "disabled". Those cars typically used a three speed OD trans and averaged around 40 mph for the long runs. The old OD units will freewheel when the driveshaft spins faster than the engine to prevent over revving -- the drivers took max advantage of that. They likely did start in second gear. The old long stroke/small bore sixes were like tractor motors, they could be lugged without choking down or "jerking" like modern cars will (one old American I had was the only stick shift my ex wife could drive on anything but a flat surface!).

The main thing is how you drive. Keep speed around 35-45 and don't get in a hurry to do anything and piss everyone else on the road off. Then you too can get 25-30 mpg out of an old Rambler! Drive a Honda like that (well, you can't lug it, but with a stick could push in the clutch and coast down hills) and you can probably get 40+ mpg. A typical driver would average about 20 mpg in that same Rambler driving normally. Of course it won't take off but so quick, and it's most comfortable cruising in the 45-60 mph range (over 60 is pushing it a bit, but you won't blow the tank motor up). So you can't help but average around 20 mpg in them. Same with old VW Bugs. Lots of people seem to think they got great mileage, and they did FOR THE TIME. Bugs average about the same as the Ramblers -- 20 mpg for most, with careful driving up to 25 mpg. But most American cars in the late 50s and early 60s got 15-16 mpg on average, or less, so another 5 mpg or so is great! That's right, no 30 mpg bugs... but it sure seemed like it after driving the old big Chrysler around for a while!
Reply With Quote Quick reply to this message
  #20 (permalink)  
Old 09-04-2010, 05:57 PM
vicrod's Avatar
life is a ride
 

Last journal entry: 2014
Last photo:
Join Date: Nov 2005
Location: Telford, PA
Age: 71
Posts: 1,341
Wiki Edits: 0

Thanks: 0
Thanked 59 Times in 55 Posts
Let me see??

Hotrodding --vs-- Efficiency.

You have wandered into a zone of no return. Get out fast or forever regret your actions.

vicrod
Reply With Quote Quick reply to this message
  #21 (permalink)  
Old 09-26-2010, 12:54 PM
Dirty Biker's Avatar
Bold As Love
 
Last photo:
Join Date: Aug 2010
Location: In my van, down by the river.
Age: 38
Posts: 378
Wiki Edits: 0

Thanks: 1
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by farna
The Ramblers had to be certified stock for the economy runs, that's one reason NASCAR supervised everything. They weren't powered by short stroke engines, most of the high mileage cars used the old 195.6 L-head ( Americans only, the bigger Ramblers used the 195.6 OHV) like Martinsr built for his 60 American.
According to this engine data table the stroke was only 3 inches on a 199 amc 6 cylinder, with a 5.875 rod. Three inch is pretty short.

http://victorylibrary.com/mopar/m-table-c.htm#AMC
Reply With Quote Quick reply to this message
  #22 (permalink)  
Old 09-27-2010, 02:13 PM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 59
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 597 Times in 546 Posts
The 195.6 cid L head engine had a 3.13" bore X 4.25" stroke- and is the "mileage" engine being discussed above.
Reply With Quote Quick reply to this message
  #23 (permalink)  
Old 09-27-2010, 02:45 PM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 47
Posts: 9,395
Wiki Edits: 0

Thanks: 29
Thanked 469 Times in 426 Posts
At the Victory Library link, you have to look it up under "Rambler" not "AMC".
Reply With Quote Quick reply to this message
  #24 (permalink)  
Old 09-30-2010, 06:43 PM
topwrench's Avatar
Registered User
 

Last journal entry: fish carb
Last photo:
Join Date: Jul 2010
Location: lillian al.
Age: 67
Posts: 290
Wiki Edits: 0

Thanks: 1
Thanked 2 Times in 1 Post
"stock cars" that ran certified milage runs were massaged a lot
Engines taken apart and loosened up
100 pounds of air in tires(gauge read 26)
carbs leaned out to max
Even the bearing grease and brakes were played with
Best milage depended on the driver....
Drive like there is an egg between foot and accelerator pedal!!!
Reply With Quote Quick reply to this message
  #25 (permalink)  
Old 09-30-2010, 07:11 PM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 59
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 597 Times in 546 Posts
The Mobilgas Economy Runs were done for many years, they were always a bragging point for the winning marque, rags like Motor Trend, Car and Driver and Road and Track would have articles on the event, and even HR would mention them.
Reply With Quote Quick reply to this message
  #26 (permalink)  
Old 09-30-2010, 08:09 PM
Registered User
 
Last photo:
Join Date: May 2006
Location: Jax Fl
Posts: 383
Wiki Edits: 0

Thanks: 16
Thanked 4 Times in 2 Posts
You want economy? Check out his link! http://strangevehicles.greyfalcon.us...OLKSWAGENS.htm
Reply With Quote Quick reply to this message
  #27 (permalink)  
Old 10-01-2010, 08:36 PM
KA67_72's Avatar
Member
 
Last photo:
Join Date: Jan 2003
Location: Knoxville, Tn
Posts: 311
Wiki Edits: 0

Thanks: 1
Thanked 3 Times in 3 Posts
I got what you need right here. Check this bad boy out:
http://www.gizmag.com/go/3263/
It makes peak hp at 102 rpm with over 50% thermal efficiency. Stick that in your Prius and smoke it. Hippies!!!! If you trade in your paid for 12mpg pickup you'll just need to drive it 18 bagillion miles a month to break even.

Kevin
Reply With Quote Quick reply to this message
  #28 (permalink)  
Old 10-01-2010, 08:55 PM
Landshark928's Avatar
FrankenPorsche
 
Last photo:
Join Date: Feb 2010
Location: Pensacola, Fl
Age: 45
Posts: 459
Wiki Edits: 0

Thanks: 0
Thanked 13 Times in 9 Posts
How about this in your four banger. Help the environment and still feel like a bad ***.

http://www.youtube.com/watch?v=b9XAC-BvUyo
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -6. The time now is 04:36 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.