Planned mods for '91
Thread Starter
|
Senior User
Joined: Aug 2005
Posts: 117
Likes: 0
From: Klamath Falls, Orygun
Planned mods for '91
Wanting to do what mods/upgrades I can to a '91 F350 to increase mileage and maintain towing ability. After reading the forum for a while I have ideas and wanted to get feedback from you all. I want to maintain 65 mph pulling about 7-8K lbs and a load in the bed, and win the 20 mpg contest (j/k, good info in that thread). This is in the 1800-3000 rpm range when cruising.
1.) headers, high flow muffler and cat ... was looking at the Thorleys .... long tubes and smaller diameter ... stock cat is good if it's not plugged? stock muffler is quite restrictive?
2.) add more spark to ensure complete combustion ... not sure how yet ... simple coil swap?
3.) increase intake efficiency ... I haven't found a FIPK and am not conviced it'd help much ... any ideas?
I have a budget of about $2K and want to include bigger tranny cooler and temp gauge.
Good ideas? Missing anything?
Thanks!
1.) headers, high flow muffler and cat ... was looking at the Thorleys .... long tubes and smaller diameter ... stock cat is good if it's not plugged? stock muffler is quite restrictive?
2.) add more spark to ensure complete combustion ... not sure how yet ... simple coil swap?
3.) increase intake efficiency ... I haven't found a FIPK and am not conviced it'd help much ... any ideas?
I have a budget of about $2K and want to include bigger tranny cooler and temp gauge.
Good ideas? Missing anything?
Thanks!
Thread Starter
|
Senior User
Joined: Aug 2005
Posts: 117
Likes: 0
From: Klamath Falls, Orygun
*bumpup* 'really looking for some feedback here; I'd like to 'stand on your shoulders' as it were and use some of the knowledge and experience I know many of you have and I don't.
Senior User
Joined: Apr 2004
Posts: 192
Likes: 1
You might want to look into a cam, I don't know how aggressively you want to mod the engine. Comp Cams has a cam that will work with the stock computer, has very strong torque andexcellent gas mileage. It's a bit on the high side, around $225 or so I think. I'm using it in a moter that I'm in the process of building (wouldn't happen to have a spare set of E7 or F3 heads, would you?), so I can't tell you how it runs quite yet, but everything i've read about it has been glowing.
http://compcams.com/Technical/Curren...ML/102-109.asp
About halfway down, 34-255-5
For that budget, you might look into a port job as well, although I do not know how much that will help on a street engine.
http://compcams.com/Technical/Curren...ML/102-109.asp
About halfway down, 34-255-5
For that budget, you might look into a port job as well, although I do not know how much that will help on a street engine.
Thread Starter
|
Senior User
Joined: Aug 2005
Posts: 117
Likes: 0
From: Klamath Falls, Orygun
This may be a dumb question, but can I swap cams without pulling the engine? 'could pull the radiator I suppose to slide the cam in. If I were doing a cam, would I want to look for an earlier timing chain setup while I was at it? (seems I read something about the earlier timing chains being better)
Senior User
Joined: Apr 2004
Posts: 192
Likes: 1
I really don't know, it depends on the truck, how the engine bay is set up, etc, but I think you can. You'll have to remove the radiator and maybe the front grill, but I know that on most engines, this is possible. Please remember, though, that I've never, ever done it in my life, so i'm really talking out of my ***. As long as you're replaceing the cam, though, yeah you'll probably want to get an aftermarket timing chain, a nice double-roller or somthing.
Honestly, my technical knowlage of the subject is really, really minimal, I would ask someone who was more experianced before actually ordering anything, i'm just hoping to give some ideas.
Honestly, my technical knowlage of the subject is really, really minimal, I would ask someone who was more experianced before actually ordering anything, i'm just hoping to give some ideas.
Senior User
Joined: Mar 2004
Posts: 274
Likes: 0
From: MI
First thing I would look at is how easy is it to push your vehicle in neutral. The easier the better. I too am working on better economy giving away tips here. I am doing mine in stages though as things wear out muffler is my next step and looking at aerodynamics too. I also have a cap on my bed the taller one. hat hurs me too. So do the dually tires. Road tread is better than all-terrain.
