Towing With A 460 Ford

What you are experiencing is what's call the "460 roar." The transmission intercooler kicks in when the engine temp goes up under load, and between the mechanical and turbo noise, it can startle you even after you think you're ready for it. The good news is I can watch the engine temp go down almost immediately after the intercooler kicks in.
One piece of advice: if you're towing in hot weather, give the engine a chance to cool down some before you shut down the engine, otherwise the exhaust manifolds might tend to warp and spit bolt caps off. Happened to me, and I had to replace both the right manifold and the bolt set (and Ford gets $112 for a set of manifold bolts (really)). Hope this helps,

I think any 460 or 454 will do well with the addition of headers, FF muffler and a CAI. Both run hot and have a tendency to crack exhaust manifolds especially when pulling long hills with a tow on a hot day. Headers will not only give you about 80 more HP for pulling hills but reduce the heat generated and reduce the constant downshifting and fan clucth noise you have now. Also you can add another layer of insulation to the inside of the doghouse to reduce the noise and heat. These mods all helped me with my older 454. Also look at your towing capacity for your MH it is probably 5000 lbs, but a lighter car would be better something under 3000 lbs. Does the MH run hot now on hills without a tow?

Gjac wrote:
I think any 460 or 454 will do well with the addition of headers, FF muffler and a CAI. Both run hot and have a tendency to crack exhaust manifolds especially when pulling long hills with a tow on a hot day. Headers will not only give you about 80 more HP for pulling hills but reduce the heat generated and reduce the constant downshifting and fan clucth noise you have now. Also you can add another layer of insulation to the inside of the doghouse to reduce the noise and heat. These mods all helped me with my older 454. Also look at your towing capacity for your MH it is probably 5000 lbs, but a lighter car would be better something under 3000 lbs. Does the MH run hot now on hills without a tow?

Temp goes up some but as yet not hot. Really haven't stressed it too much though. Whose headers do you recommend?

Yankee Clipper wrote:
What you are experiencing is what's call the "460 roar." The transmission intercooler kicks in when the engine temp goes up under load, and between the mechanical and turbo noise, it can startle you even after you think you're ready for it. The good news is I can watch the engine temp go down almost immediately after the intercooler kicks in.
One piece of advice: if you're towing in hot weather, give the engine a chance to cool down some before you shut down the engine, otherwise the exhaust manifolds might tend to warp and spit bolt caps off. Happened to me, and I had to replace both the right manifold and the bolt set (and Ford gets $112 for a set of manifold bolts (really)). Hope this helps,

Appreciate the tips. Thanks!

I had a 460 for 11 years but not on a coach that big. Yes they are noisy and adding insulation to the dog house is a subject that comes up often. You also must make sure the dog house is seated properly. A tiny space will let a tremendous amount of noise and heat inside. I believe I did some 1st gear pulling in some of the tall hills in Calif. Highly unlikely you have a turbo. There are aftermarket kits available to help boost the power.

You don't have a turbo or intercooler and the noise is the fan kicking in because of the elevated water temps. It probably has a separate trans cooler but it also runs through the radiator. Both the eng and transmission cause the coolant temps to rise in the hills.

I towed with a 97 460 F53 chassis.

It was t the going up part that I worried about it was the downhill part; marginal brakes.

Be very careful. You may need to go down in second.

Bleed brakes often, keep your caliper slides greased often and use Ford OEM high temp brake fluid.

Had a 460 in a 1996 36' Bounder. It's a solid motor that can be even better with a Banks complete manifold to exhaust kit. But, its a very expensive upgrade. The 460 manifolds are the culprit.

F4Jock wrote:

Gjac wrote:
I think any 460 or 454 will do well with the addition of headers, FF muffler and a CAI. Both run hot and have a tendency to crack exhaust manifolds especially when pulling long hills with a tow on a hot day. Headers will not only give you about 80 more HP for pulling hills but reduce the heat generated and reduce the constant downshifting and fan clucth noise you have now. Also you can add another layer of insulation to the inside of the doghouse to reduce the noise and heat. These mods all helped me with my older 454. Also look at your towing capacity for your MH it is probably 5000 lbs, but a lighter car would be better something under 3000 lbs. Does the MH run hot now on hills without a tow?

Temp goes up some but as yet not hot. Really haven't stressed it too much though. Whose headers do you recommend?

. I an happy with the 30% performance increase with the ceramic coated Thorley Headers, Banks are probably better but much more expensive. Check your exhaust manifolds for leaks or cracks, some of the noise you hear may be coming from that. Is the MH new to you?

Gjac wrote:

F4Jock wrote:

Gjac wrote:
I think any 460 or 454 will do well with the addition of headers, FF muffler and a CAI. Both run hot and have a tendency to crack exhaust manifolds especially when pulling long hills with a tow on a hot day. Headers will not only give you about 80 more HP for pulling hills but reduce the heat generated and reduce the constant downshifting and fan clucth noise you have now. Also you can add another layer of insulation to the inside of the doghouse to reduce the noise and heat. These mods all helped me with my older 454. Also look at your towing capacity for your MH it is probably 5000 lbs, but a lighter car would be better something under 3000 lbs. Does the MH run hot now on hills without a tow?

Temp goes up some but as yet not hot. Really haven't stressed it too much though. Whose headers do you recommend?

. I an happy with the 30% performance increase with the ceramic coated Thorley Headers, Banks are probably better but much more expensive. Check your exhaust manifolds for leaks or cracks, some of the noise you hear may be coming from that. Is the MH new to you?

Yes, it is new to us but we've had it thoroughly gun over by a competent large truck mechanic and everything engine and exhaust wise is fine.