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1985 f150 build

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Old 05-13-2018, 08:53 PM
Bmoodie10
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1985 f150 build

purchased an 85 f150 about a year ago. Solid 12 months of running around. Time to pull the motor, rebuild, and keep things moving. Nasty rear main seal leak, dripping all over tranny. Dropped fluids today, pulled coolant system. Will hopefully pull motor next weekend. Will attempt to document this build and harass all the old heads while i do it. Not really looking for a “fast truck.” More so a well built 302 that runs correctly, is loud as hell, and lets me drag my kiddos to the gas station for a beer run on the weekends.
 
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Old 05-14-2018, 09:09 AM
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Looking forward to your progress!
 
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Old 05-14-2018, 09:25 AM
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Originally Posted by Bmoodie10 View Post
purchased an 85 f150 about a year ago.
Carburetor or EFI ?
Best of luck !!
 
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Old 05-14-2018, 03:12 PM
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Originally Posted by vjsimone View Post
Carburetor or EFI ?
Best of luck !!
carbureted. Past owner slapped a Holley double pumper on the motor and claims to have a bit of performance upgrades. Bit of overkill? Don’t ya think? Interested to see what’s actually inside the motor once it’s dug out. Motor has been pulled before, so who knows what little gems it may hold.

If the motor ends up being basically stock, it’s safe to say that massive carb isn’t really doing me any good, right?
 
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Old 05-14-2018, 05:21 PM
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Originally Posted by Bmoodie10 View Post

carbureted. Past owner slapped a Holley double pumper on the motor and claims to have a bit of performance upgrades. Bit of overkill? Don’t ya think? Interested to see what’s actually inside the motor once it’s dug out. Motor has been pulled before, so who knows what little gems it may hold.

If the motor ends up being basically stock, it’s safe to say that massive carb isn’t really doing me any good, right?
What does it do when you slam the gas pedal to the floor when in high gear?
 
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Old 05-14-2018, 05:24 PM
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On a stock engine you will get faster acceleration, a higher top end, and burn more fuel (because you foot will be in it more).
I don't know the rest of the story, somebody else should chime in here on this.
You might get 25 hp extra, maybe.....
Now, if it is an aluminum double pumper, then it doesn't matter, because they look so good,,,,
 
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Old 05-14-2018, 05:35 PM
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Originally Posted by Franklin2 View Post
What does it do when you slam the gas pedal to the floor when in high gear?

gets up and goooooo’s. Truck was actually pretty quick for what it was, kinda why I just left it alone. Would chirp the wheels out of a stop, and then has some serious top end gusto.
 
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Old 05-14-2018, 05:36 PM
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Originally Posted by vjsimone View Post
On a stock engine you will get faster acceleration, a higher top end, and burn more fuel.
I don't know the rest of the story, somebody else should chime in here on this.
You might get 25 hp extra, maybe.....

hmmm. So if gas milage isn’t an issue, just leave it be.
 
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Old 05-14-2018, 05:36 PM
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Originally Posted by vjsimone View Post
On a stock engine you will get faster acceleration, a higher top end, and burn more fuel.
I don't know the rest of the story, somebody else should chime in here on this.
You might get 25 hp extra, maybe.....
With a double pumper on a stock 302 in a heavy truck? I expect a huge cough and bog from a double pumper when it's slammed to the floorboard, but maybe I can learn something here.
 
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Old 05-14-2018, 05:43 PM
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Originally Posted by Bmoodie10 View Post
hmmm. So if gas mileage isn’t an issue, just leave it be.
Gas mileage will be better than the 2 bbl, if you don't put your foot in it..
 
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Old 05-14-2018, 05:53 PM
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Originally Posted by Franklin2 View Post
With a double pumper on a stock 302 in a heavy truck? I expect a huge cough and bog from a double pumper when it's slammed to the floorboard, but maybe I can learn something here.
If not tuned properly then yes you would get a big bog and cloud of black smoke. But dialed in and you will get better acceleration than any vacuum secondary. Ideally on a close to stock engine you want progressive secondary's on a double pumper. This will allow you to cruise to on just the primary venturis.
 
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Old 05-14-2018, 06:10 PM
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Stock exhaust ?
 
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Old 05-14-2018, 06:15 PM
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Originally Posted by Franklin2 View Post
With a double pumper on a stock 302 in a heavy truck? I expect a huge cough and bog from a double pumper when it's slammed to the floorboard, but maybe I can learn something here.
Not if tuned right but you have to start with the right size carb.
I had Holley's 650HP & 750HP DP on a 360 and the 650 ran and felt great, swapped on the 750 and it had a big bog.
I did a lot of tuning of carb & timing and never really got rid of it but was able to live with it.
Thing was the 650 & 750 got the same times at the track I was just to lazy to put the 650 back on.

You can also get a bog with a vacuum carb if it opens to quickly. That is why they have different springs to adjust how fast they open.

IIRC as a rule the DP is used on stick trany cars/trucks and the vacuum used on auto tranys
Dave ----
 
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Old 05-14-2018, 06:15 PM
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Originally Posted by Franklin2 View Post
With a double pumper on a stock 302 in a heavy truck? I expect a huge cough and bog from a double pumper when it's slammed to the floorboard, but maybe I can learn something here.
starting to think motor is a lot less “stock” than I thought. 🤷*♀️
 
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Old 05-14-2018, 06:16 PM
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Originally Posted by vjsimone View Post
Stock exhaust ?
straight pipes.
 
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