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yup, no "jake brake" made for these engines. the closest is the exhaust brake.
i looked into one years ago when i was towing heavy with my back then new 1988, and passed on it as i felt it would not be good for the engine with the high compression we have.
i then conversed with a trusted mechanic and he confirmed my fears that being 22.5:1 compression ratio adding an exhaust brake would only decrease engine life by causing undesigned pressures in the engine.
I was wondering on where you can buy a engine/jake brake kit for a 7.3 idk
IKD if you are looking for sound or actual braking ability. But since you have an answer regarding the engine/exhaust braking, I'll offer you a solution through your drivetrain. Telma offers an electromagnetic braking system through the drivetrain or fitted adjacent to the drive differential. I've used engine braking for driving and it seemed every truck was different with greater/less braking capability. I've used the Telma retarder in Colorado over several mountain passes and the Telma was definitely better and more controllable with less air/brake usage on the steep mountain passes. When used correctly, even in snow/slick conditions it was smoother and more comforting than the engine/wheel brakes and there was less chance of loosing wheel traction when used correctly.
IKD if you are looking for sound or actual braking ability. But since you have an answer regarding the engine/exhaust braking, I'll offer you a solution through your drivetrain. Telma offers an electromagnetic braking system through the drivetrain or fitted adjacent to the drive differential. I've used engine braking for driving and it seemed every truck was different with greater/less braking capability. I've used the Telma retarder in Colorado over several mountain passes and the Telma was definitely better and more controllable with less air/brake usage on the steep mountain passes. When used correctly, even in snow/slick conditions it was smoother and more comforting than the engine/wheel brakes and there was less chance of loosing wheel traction when used correctly.
The best brake upgrade is bolting on the '87-'97 F-super duty/F450's hydroboost setup. It's night and day. I used to always say; going from vacuum brakes to hydraulic, added more stopping power than adding a turbo to an N/A IDI, adds engine power. It's massive and turns your truck into a far safer truck for those hauling heavy loads. I was blown away at the difference. It's like a whole different feel to the truck. It's as if you just think, this is the way they should have just all rolled off the line to begin with. In fact, I dunno much about modern trucks but I think they're making this a norm now on super duty (f250/f350+) and perhaps have been for a while now.
Since the brake pedals of the F450's are hard to find, the guys in the general '87-'96 ('97HD) section, suggest using a more modern setup where you can source all the parts now. Be sure to look into that first.
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