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96 F150 4.9 stock chassis dyno

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vrrrrr
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96 F150 4.9 stock chassis dyno

Post #1 by vrrrrr » Wed Sep 16, 2020 2:20 pm

Hello everyone,

I recently bought a 200k+mile 96 F150 with a 300 I6/5spd manual for a great price and used it to tow *ahem* slightly more than the original rated tow capacity across the country. I've been debating what to do with the truck and figured I'd start by seeing where it was performance wise. So a trip to the local dyno shop told me the truck was thumping out a grand total of...drumroll please...110hp and 210tq to the wheels. While horsepower peak was around 3600rpm, torque "peak" was pretty hard to nail down since it was just about the flattest torque curve I've ever seen.

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THE FRENCHTOWN FLYER
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Re: 96 F150 4.9 stock chassis dyno

Post #2 by THE FRENCHTOWN FLYER » Wed Sep 16, 2020 9:45 pm

110 at the rear wheel of a 200K truck does not sound too bad to me.
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arse_sidewards
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Re: 96 F150 4.9 stock chassis dyno

Post #3 by arse_sidewards » Thu Sep 17, 2020 8:39 am

THE FRENCHTOWN FLYER wrote:110 at the rear wheel of a 200K truck does not sound too bad to me.


Especially if it's got the E4OD sucking down power.
1994 F150 4x4 8ft, engine is basically stock.

66" leafs, extended radius arms, lockers in both ends, nothing special.

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Re: 96 F150 4.9 stock chassis dyno

Post #4 by jgregg13 » Thu Sep 17, 2020 1:51 pm

arse_sidewards wrote:Especially if it's got the E4OD sucking down power.


It's a 5 speed, so hopefully the pull was done in 4th. I guess after 200K some of those horses might have dementia now. The key here is it's a baseline. If you're going to make some improvements you'll see what your gains are. I didn't get a baseline on mine so I'll use this as reference when I test my re-hashed '95 EFI with turbos.

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Re: 96 F150 4.9 stock chassis dyno

Post #5 by xctasy » Thu Sep 17, 2020 6:53 pm

Multiply by 1.27(235 tires) to 1.34 (33's) for a reliable manual trans rwhp to flywheel net hp figure on a Mustang dyno.

Sounds about right.

As long as the engines injectors arent gummed up or has valve or ring to bore wear, an properly functioning EFi 4.9 liter will still make excellent power.
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vrrrrr
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Re: 96 F150 4.9 stock chassis dyno

Post #6 by vrrrrr » Thu Sep 17, 2020 10:48 pm

There was supposed to be a dyno sheet attached, but I guess I'm not allowed to share attachments yet?

Mind you, I'm not complaining! I was pleasantly surprised to break into the triple digits. The truck cost $1600, has zero rust, and brought me and 8000lbs of stuff almost 2500 miles in 51 hours. Before the trip I replaced the tires, front shocks, front brakes, AC compressor, and power steering pump, as well as light bulbs and a radio to make the trip more pleasant. The only engine-related work I did was to replace some spark plugs in Arkansas after one blew out on the highway. The truck still ran fine on 5 cylinders, though the noise did attract a lot of attention until I could make it to a nearby auto parts store.

It is currently throwing some codes for O2 sensors and exhaust leaks, and from the sound of it the latter is definitely happening. I'm sure the A/F ratio being out of whack from the O2 sensor issues and exhaust problems isn't helping peak power output. I wanted to see what power it was making since that's how I drove it across the country. I don't know that I'd attempt to pull the same amount of weight with the truck again without a little more power, but either way, the truck made the trip.

Yes, it was on a Mustang dyno and yes, it was in 4th gear for 1:1 output. I would have fixed the exhaust leak(s?) sooner, but I am considering throwing the old HX35 from my Dodge inline six on this truck, and since that would necessitate pretty much a whole new exhaust system anyway, I have held off for a while. I am also not sure if I want to keep this engine in the truck or swap it out for a 351W - don't throw rotten fruit at me yet! - and put the 300 I6 in my old Mustang, with the turbo, of course.

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