Moparchat - Home of MOPAR enthusiasts worldwide!



Go Back   Moparchat - Home of MOPAR enthusiasts worldwide! > Technical Forums > Dakota Truck Forum

Click here to search for Mopar cars and parts for sale.


Reply
 
Thread Tools Display Modes
  #1  
Old 11-09-2000, 06:14 AM
SKIDAKV8 SKIDAKV8 is offline
Inactive User
 
Join Date: Feb 2000
Location: Portland,Oregon
Posts: 116
Question

There is much discussion about added power and torque with the installation of a custom throttle body such as Quick D's. Do you get better gas mileage also? (Assuming you're not having so much fun with the added power that you're romping on it all the time)
Reply With Quote
  #2  
Old 11-10-2000, 06:16 AM
Jon_Smith's Avatar
Jon_Smith Jon_Smith is offline
Slingn mud & burnin tires
 
Join Date: Aug 2000
Location: Raleigh, NC
Posts: 1,131
Post

assuming that, yes you'll get better mileage.

------------------
Jon Smith
Cary, NC
95 Dakota 4x4 CC
educating the stupid, one kill at a time (quoteth Chuck)
www.fast4x4.net
Reply With Quote
  #3  
Old 11-10-2000, 02:47 PM
Fastdak Fastdak is offline
Senior Member
 
Join Date: Feb 2000
Location: USA
Posts: 510
Post

I gained some extra milage when I added my TB.

------------------
94 Dakota Sport 5.2L, Magnum Performance Super Karbine 250 throttle body, 3.90 auburn LSD, K+N X-stream filtercharger, MSD 6A, Blaster Coil II, Taylor wires, MP Computer, Pacesettter headers, Dynomax supercat, Flowmaster 50, Crower 1.7 rockers, Lakewood traction bars, Hellwig sway bar, Transgo shift kit, MP valve covers, Firestone Firehawks SS20
Reply With Quote
  #4  
Old 11-10-2000, 10:28 PM
HankL HankL is offline
Inactive User
 
Join Date: Jul 2000
Location: Durham, NC, USA
Posts: 1,910
Post

If you run your engine at Wide Open Throttle (WOT) all the time - a less restrictive air filter or Throttle Body would increase all 3 'good' things: HP, Torque and fuel economy.

If you put on a less restrictive intake and then chassis dyno test the truck at WOT it will show better 'Brake Specific Fuel Economy.'

But (big but here)-

When you are at part-throttle, like most daily driving, there is no advantage to a less restrictive air filter or throttle body.

When you are driving along the highway at 70 mph, you create a restriction to keep the engine at constant horsepower so that you keep a steady 70. You 'throttle' the airflow.

What if you could 'magically' add a less restrictive air filter or Throttle Body instantly while you drive - what would happen ?

Your engine would feel the less restriction - it would breathe more air - make more horsepower - AND THIS IS THE IMPORTANT PART - your truck would speed up.

When the truck began to speed up, you would back off of the accelerator and 'throttle' it back down some. The extra throttling wipes out any benefit that you tried to add with the new high-flow parts.

I know that many many people claim that they got better mpg when they added a less restrictive air filter or Throttle Body - I have read those claims too. But if you do a series of careful tests over the exact same stretches of highway before and after there is no gain.

The MPG of Dakota and Ram trucks vary quite a bit with different highway conditions. It is very easy for there to be a 3-4 mpg variation at random.

With this kind of variation half the truck owners will see better mpg on their next tankful, and half will see worse. Those that see a gain gleefully report it.

On the other hand, less restrictive exhaust systems almost always do show some modest MPG gains. Increasing the compression ratio of the engine nearly always shows MPG gains. Making the truck more aerodynamicly slippery will show gains. Making the vehicle lighter will show gains. Easier rolling tires will show gains.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
04 Wrangler X feul system trouble? gunsmith@cz-usa.com Jeep Chat (Wrangler, Cherokee, etc...) 2 02-28-2008 12:01 PM
feul pump moparots Dakota Truck Forum 6 03-24-2004 10:13 PM
Feul Injection TrxR Performance Talk 3 12-31-2003 10:53 AM
feul pressure? tim Performance Talk 3 07-01-2003 11:29 AM
Feul Injectors d/l dakota Dakota Truck Forum 9 02-10-2002 02:24 AM




All times are GMT -4. The time now is 10:45 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
. . . . .