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Dec 25, 2004 | 12:01 PM

SCAS

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Joined: Jun 2004

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I have a 85 F-150 with a I6, no a/c and 4 w/ od.. Is there any way I can get mopre power out the engine so I can go faster... I can only do 130km/ph in 4th... Its kinda slow to drive down the 401

Dec 25, 2004 | 01:22 PM

desperado_18_2000

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Joined: Jan 2001

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From: S. Mississippi

There are plenty of things that you can do to it to get more oomph out of it.

First off, a full tune up with all filters would be my first thing on the list.

After that, a tubular exhaust headers or EFI shortie manifolds will work great also. Also a slightly larger single exhaust will help here too, with some highflow cats/mufflers.
Ditch the TFI ignition and convert to a duraspark setup and install a 4v manifold and carb. Or go for a redily available motorcraft 2150 2v as seen on many ford small block v8's.

Those are about the simplest bolt on upgrades for these engines.

Dec 25, 2004 | 01:32 PM

1984 f250

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Joined: Dec 2004

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then a littlefield blower and a hot crane cam haha just kiddin, but as far as intake, if you want to try a cool air cleaner get a GREEN filter, there better then K&N and there cheaper.

Dec 25, 2004 | 08:54 PM

f100guy

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Joined: Jun 2003

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From: shepherd

well the 300 isn't the best thing to use and go fast with, but i don't see why all the fuss is about them. i just got another in a swb f100 with a 303 manual and it goes pretty well. only gets 11 mpg though. yeah get rid of the feeder carb and tfi and install a turbo muffler and some efi exhaust manifolds.

Dec 25, 2004 | 09:34 PM

Samsonitesamsonite

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Joined: Aug 2003

Posts: 828

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From: Bellingham, WA

check out the Straight 6 forums we have a lot of info for ya over there! and the I6 when done right will scream but it costs $$$$ its more of a work horse

Dec 26, 2004 | 10:53 AM

Holmesuser01

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Joined: Nov 2004

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From: Asheville, NC

My '84 with the 300 six, and top shifter overdrive will do over 85 on the interstates here in the mountains. Maybe your motor just needs some attention. Its a goodie!

Dec 26, 2004 | 11:48 AM

oldhalftons

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Joined: Feb 2003

Posts: 3,439

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From: Spokane WA

It must just be a tired engine. A 300 with log exhaust/stock 1bbl and 3.00-3.50 gears should push a truck to 85 easily.

before I started the brake/suspention work I've had my 79 2wd well over 100 a couple times but it has a OD transmission.