I6 upgrades
Post Fiend
Joined: Jan 2000
Posts: 5,330
Likes: 17
From: Dryden, ON, Canada
I6 upgrades
[font size="1" color="#FF0000"]LAST EDITED ON 27-Sep-00 AT 07:46 PM (EST)[/font][p]Other than the forged crank, the HD has forged Pistons(mine are missing...), connecting rods, sodium filled(or is that cooled?) valves, a lower stock compression ratio(8:1.) External clues to identify a HD by are the alt bracket, which has no place to mount an air pump, a solid spacer in place of the EGR spacer, a plug in the exhaust manifold where the egr pipe would normally connect to, and, if it's still in a vehicle, the emissions sticker will have "Non Catalist" written on it. The easiest way to het a HD is to get a 300 out of a F600, as the HD was the base engine in that series. I have a Non Catalist emissions sticker and I am trying to find a replacement for it to put on my truck, if you want the calibration number off of it, I will get it for you on the weekend.
Evan MacDonald
82 F100 FlareSide
HD 300-6, 240 head
Headman Hedder
NP435(6.69 low)
2.73 Geared 9"
Blue & Silver
Evan MacDonald
82 F100 FlareSide
HD 300-6, 240 head
Headman Hedder
NP435(6.69 low)
2.73 Geared 9"
Blue & Silver
Thread Starter
|
Senior User
Joined: Sep 2000
Posts: 162
Likes: 0
From: Castine, ME
I6 upgrades
Thanks Evan...I most certainly have the LD 300 as I have an air pump mounted on the alternator bracket. Also...in another post I read that you get better that 26 mpg??? With all thoes mods, other than a 240 head, how do you do it? On my stock 300 i get 17.2 highway with the three speed with overdrive running 1500 rpm @ 65mph in od. I guess my question is; will modifications including a clifford water heated mainifold with a 390 Holley, a hedman header and straight dual exhaust actually improve my gas mileage?
thanks,
Tim
thanks,
Tim
Senior User
Joined: Mar 2000
Posts: 337
Likes: 0
I6 upgrades
my truck has a 300 too, i may a budget modification, i i had two cats on my exhaust i cut the second one off, and ran straight pipe all the way comming out to in front of the rear wheel, ive noticed the motor catches rpms alot quicker than before, now, my question, i had the carter feedback carb on it, ive disconnected all the emmissions crap that runs into it this cause it to blow out enough gas to shoot fire, someone up here suggested a older non feedback carb.... got one on it today, doing this swap really cleaned alot of junk aounr the manifold, but yet its still wasting alot of gas, what can i do here?
by the way, here in this part of nc im not worried about emmision itll pass any time
by the way, here in this part of nc im not worried about emmision itll pass any time
Senior User
Joined: Aug 1999
Posts: 156
Likes: 0
I6 upgrades
Tim, adding a header or duel manifolds, 4 bbl carb and intake, and duel exhaust should improve your mileage overall. On the 240 in my 65 F100, my hi-way mileage improved alot, but city mileage didnt improve much, so... be prepared to expect anything if you modify your 300.
Post Fiend
Joined: Jan 2000
Posts: 5,330
Likes: 17
From: Dryden, ON, Canada
I6 upgrades
How do I do it? Well, I've got it running as lean as is safe, the timing is set by ear to the highest idle(damper is on my truck wrong, can't use a timing light.) And I drive with a light right foot(with gas at $3.17 a gallon, you have to.) I think that running the engine at it's torque peak will make for better mileage(Mine cruises at 60 at 1950 rpm, peak torque is at 2000 rpm.)
Good luck
Evan MacDonald
82 F100 FlareSide
HD 300-6, 240 head
NP435(6.69 low)
2.73 Geared 9"
Blue & Silver
Good luck
Evan MacDonald
82 F100 FlareSide
HD 300-6, 240 head
NP435(6.69 low)
2.73 Geared 9"
Blue & Silver
Posting Guru
Joined: Mar 2001
Posts: 1,494
Likes: 0
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Senior User
Joined: Dec 2001
Posts: 340
Likes: 0
I6 upgrades
To side gap, you cut the part of the electrode that you noprmally bend to gap the plug real short. So now it doesn't extend over the center electrode. Then bend what's left of the electrode you cut to the center until you get the right gap (it'll now extend from the side.) Now the spark jumps from the side instead of straight down. This way there's no metal "blocking the spark" from the combustion chamber, the plug is opened up. I think its one of those Carolina Boys dirt track/stock car trick, that I had never heard of either. (they're constantly searching for more HP)
Thread
Thread Starter
Forum
Replies
Last Post
timmwag
Brakes, Steering, Suspension, Tires, & Wheels
2
Jan 1, 2010 10:45 PM
RICHARD CLARK
Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)
1
May 10, 2005 10:37 AM