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Supercharged Ford 300 Engine Build

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Hephaestus29

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Mar 13, 2011
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Indianapolis
I really like my 300 six cylinder and would
have done something like that years ago
but it's got 200,000 on it now, and it's
rusting out. It wont be long and I'll be
retiring it.
 
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madoc1

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spicewood, tx
neat! will be watching this. one stout engine. on one cylinder web site rates in top 5 engines. (summit racing)

jim
 
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JonBoehman

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Philpot, Ky
I am definitely following this thread. Especially since there is a door for a 56 F100 in the background and I have been contemplating a 300 I6 for mine. Keep up the good work.
 
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LXCam

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Now this is gonna be cool!. What are you using for engine management?.
 
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stikman56

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JonBoehman said:
I am definitely following this thread. Especially since there is a door for a 56 F100 in the background and I have been contemplating a 300 I6 for mine. Keep up the good work.
Click to expand...

There's both doors actually, if you look close.... That's pretty cool work. I have a work truck with that engine.
 
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1953mercury

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Steamboat Springs CO
Intake looks great, I think I saw it on the inline 6 forum. You show a different intake with the blower. Just for mockup I assume. Are you building a different intake for the blower? You could go with a centrifugal setup. Nice to see something a little different, and those are great engines. Mike
 
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tlmartin84

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Yeah Mike, I designed the header flange to work with either the home made intake flange, or the Clifford. So at that time I just threw the Supercharger up there to see how it looked.
 
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Rock knocker

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How will the flat stock intake manifold handle the heat, vibration and boost? A lot of stress risers there.
 
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tlmartin84

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It's 16 ga. It is pretty stout. You can imagine how strong a piece of 1.5 x1.5 tubing is. The supercharger will use the flange but not be supported off of the intake itself. Boost pressure will not be an issue. I'd feel comfortable putting a 100 psi on it as is, so 15psi should be nothing.
 
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MagnumForce

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You can literally not kill a 300 Inline 6. I know because I tried! Had an 85 F150 as a kid. The old Farm truck, rusted to hell from hauling fertilizer. I got my License in 96 and this was my first vehicle. Well, I wanted something better...

Took off the air cleaner and made a "ram air" system out of dryer vent. Straight piped it, ran the temp up to about 350 when the belt broke, put a hole in the oil pan hitting a rock in the field, got it home with no oil in the engine at all, the list goes on and on...

Needless to say it is now 2015 and dad still uses the old truck to haul junk to the dump. It is even on its original clutch with over 314 K on it. I would give you and exact amount but the odometer quit 15 years ago and is stuck at 14k after rolling over twice.
 
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txvwnut

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I recently bought a bunch of Volkswagen parts from a guy building an early fifties chevy sedan with a turbo 235 six. It was quite impressive looking and me being the odd ball that I am gave him high praise for it. Can't wait to see yours progress along.
So what's it going in?
 
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Ohmthis

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Outside of Louisville KY
There was a chevy II that used to drag race local to me that ran a straight 6. Wildest sounding engine running down the track. That setup looks great, is there any type of intercooler built into the base?
 
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tlmartin84

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These were meant to run a water to air intercooler. I am going to go Air to Air instead. Eliminates needing a pump, one less thing to cause issues.
 
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flyn_brian

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Dec 28, 2013
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N.W. Indiana
I have to say that the 300 six is one of the best engines that Ford had ever built. More main bearings help keep the bottom end together. A massive coolant capacity keeps the heat at bay and good oil flow keeps the oil in the bottom end. I believe this is a good engine to add more power.
 
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SEV22XS

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Jun 26, 2014
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Different for sure should be interesting. I like the use of newer modular engine parts on the 300/6. What kind of fuel injection are you using to make it run ? I assume from the throttle body placement your going to run a intercooler not under the blower ?
 
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theoldwizard1

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SE MI
To issue to watch out for (experience from other Ford inline 6's)

The side covers and valve covers are notorious for leaks. Not sure what you can do about it except make sure you have negative crankcase pressure via a good PCV.

While you have nice equal length runner headers, you do NOT have equal length runners on your intake manifold. You will have uneven air flow distribution especially at and near WOT. If you are going to be running this engine hard (Bonneville, drag) you will need to install wide range EGO sensors near each exhaust port while you are tuning. Of course, with forced induction this may not be an issue.

At least with port injection you won't have really bad fuel distribution at WOT. I have seen inline engine where you could look down the throat of the carb/CFI unit and see the fuel running toward the rear cylinder (most engine are mounted in a chassis with a 5-10° (?) of tilt down to the rear).



In a last ditch effort to save the 4.9L, there was a skunk works project at Ford that produced a SOHC cross flow head. Only a few were made and I don't know if any even got into a vehicle. That would have been a really cool engine ! (The aussies down in Geelong did this to the old Ford 177/200/250 Ford car engine a long time ago; lot's of torque !)
 
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bluebolt

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theoldwizard1 said:
In a last ditch effort to save the 4.9L, there was a skunk works project at Ford that produced a SOHC cross flow head. Only a few were made and I don't know if any even got into a vehicle. That would have been a really cool engine ! (The aussies down in Geelong did this to the old Ford 177/200/250 Ford car engine a long time ago; lot's of torque !)
Click to expand...

Ford did build the special crossflow heads for the 300 but they were not SOHC. Here's the Frenchtown Flyer altered with one of those heads.
 

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bluebolt

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Apparently there were at least two different heads, CJ Batten built some with round exhaust ports and rectangular intake ports. Later Ford R&D apparently built heads with rectangular exhaust ports and D shaped intake ports. Frenchtown Flyer's story on the Ford R&D heads was the 300 six was cooking the fuel injectors since they are so close to the exhaust. Probably never put in production since the 1997 model year trucks were on the horizon with the new 4.2 V6. Understand that some of those 1997 model year trucks were actually built in 1995! Ford was legally selling them on Jan 1st 1996 as 1997 model year trucks which means they were built in late 1995.
 
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RedRabbit

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SoCal
Looks really cool. Those engines really can take a lot. I've supercharged 1-2 BMW inline six's and they are much easier to pipe. Let us know what it dynos at.
 
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