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300 Dyno Results

Moderator: Mod Squad

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emteek
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Joined: Tue Jul 07, 2020 2:55 pm

300 Dyno Results

Post #1 by emteek » Thu Jul 09, 2020 1:05 pm

Hello all. Recently took my project truck to the dyno to get some baseline numbers before upgrading anything. So this is stock 300 with a C6 trans. The engine is not original to the truck, you can see I plugged the smog holes with old spark plugs. There's also brass rebuild tag on the block. From what I can tell, the trans is from a newer model too, 1985ish I think.

First run, then second run
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Engine pics when I got it:
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Current pics
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Last edited by emteek on Thu Jul 09, 2020 1:48 pm, edited 1 time in total.
Hybrid? (1979 F150 Extended Cab Body, 1975 F250 Frame and Drivetrain, 300, C6)

pmuller9
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Location: Columbus, Indiana

Re: 300 Dyno Results

Post #2 by pmuller9 » Thu Jul 09, 2020 1:33 pm

Thanks for posting your dyno results.
This type of information is very useful.

What modifications do you plan to make and what are your goals?

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emteek
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Re: 300 Dyno Results

Post #3 by emteek » Thu Jul 09, 2020 1:47 pm

No problem. I hadn't seen many actual 300 dyno results, so I wanted to get some out there. Plans initially are the Clifford dual weber and headers setup. I have everything but the headers.. but going to get them coated before installation. After that, we'll see how the engine holds up for awhile, then on to a cam and/or potentially (probably) a full rebuild.

I don't have any set goals per say, mostly looking for a bit more fun while driving. Wouldn't mind being able to highway it more comfortably, though there's a lot of wind resistance working against that. I've stabilized the body for now, so once I've gotten everything mechanically how I want it, cosmetics will come next.
Hybrid? (1979 F150 Extended Cab Body, 1975 F250 Frame and Drivetrain, 300, C6)

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Econoline
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Re: 300 Dyno Results

Post #4 by Econoline » Sat Jul 11, 2020 1:32 am

That little air cleaner cost some power on the test.
It ain't gonna fix itself

Soldmy66
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Re: 300 Dyno Results

Post #5 by Soldmy66 » Sat Jul 11, 2020 12:02 pm

Econoline wrote:That little air cleaner cost some power on the test.


Very true. On the "Engine Masters" YouTube channel they did an air cleaner horsepower comparison that was (at least to me) fascinating. Some air cleaners kill a lot of power. They contend (and the results seem to indicate) that both shape and size matter, especially the air flow dynamics. The more straight shot (from the top down) the air flow can be, the better the results (as I recall). For that reason, the K&N Air Filter Lid (which allows are to enter from the top of the air cleaner) provided positive results.

I just looked, that episode (#27) is no longer available on YouTube. I hated when MotorTrend On Demand started charging for those (and other) videos. The rats.

BigBlue94
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Re: 300 Dyno Results

Post #6 by BigBlue94 » Sat Jul 11, 2020 1:39 pm

Soldmy66 wrote:
Econoline wrote:That little air cleaner cost some power on the test.


Very true. On the "Engine Masters" YouTube channel they did an air cleaner horsepower comparison that was (at least to me) fascinating. Some air cleaners kill a lot of power. They contend (and the results seem to indicate) that both shape and size matter, especially the air flow dynamics. The more straight shot (from the top down) the air flow can be, the better the results (as I recall). For that reason, the K&N Air Filter Lid (which allows are to enter from the top of the air cleaner) provided positive results.

I just looked, that episode (#27) is no longer available on YouTube. I hated when MotorTrend On Demand started charging for those (and other) videos. The rats.


Furiating isnt it?!

I run a Stef's/B&B fab high flow air cleaner. Both pieces are designed with a bell type shape to smooth airflow into a straight down shot. Running a 14x4 R2C dirt track reusable paper element.

For off-road purposes, where i overheat, I swap to a home brew CAI. Dodge Durango carb hat, fed by a 4" insulated tube and an enclosed big AFe proguard 7 cone filter. Sucks through a hole in a spare hood.
1985 Bronco. 309ci I6, NP435, 4.56 gears, Detroit locker and tru-trac, 4" lift, and 37" swamper tires. The 309 is 9.75:1 CR with a Schneider 140H cam, 4bbl, roller rockers, larger valves, and headers.

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emteek
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Re: 300 Dyno Results

Post #7 by emteek » Mon Jul 13, 2020 9:31 am

Econoline wrote:That little air cleaner cost some power on the test.



Not surprised. It was the only one I could find that fit directly onto the carb, without getting or building an adapter plate. If the dyno wasn't so far away I'd swap it with a small velocity stack and run it again.
Hybrid? (1979 F150 Extended Cab Body, 1975 F250 Frame and Drivetrain, 300, C6)

Jesse73
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Re: 300 Dyno Results

Post #8 by Jesse73 » Mon Jul 13, 2020 7:53 pm

Thanks for posting! This doesn’t give me high hopes for breaking 200 horsepower with a 240ci build.... :rolflmao:

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Econoline
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Re: 300 Dyno Results

Post #9 by Econoline » Mon Jul 13, 2020 8:27 pm

emteek wrote:
Econoline wrote:That little air cleaner cost some power on the test.



Not surprised. It was the only one I could find that fit directly onto the carb, without getting or building an adapter plate. If the dyno wasn't so far away I'd swap it with a small velocity stack and run it again.


When I got my 250 going all I had that would fit into the doghouse was one of those off the old 170. When I finally put a better carb hat on it I had to completely re tune the carb and I found some more power to.
It ain't gonna fix itself

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