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Gm 350 vs. 454

Home > Discussion Forum > Mechanic's Corner - Engines

Email Author email Dan Rochon  Reply to Message reply to message  Post New Message post new message      search forums
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Gm 350 vs. 454 Dan Rochon 2-17-02  
I am looking to buy a 26' Class C motorhome (1984). It as only 40,000 miles. It as a 350 for motor and i am wondering if it's strong enough to go up hill pulling a 2000pds boat.Any opinion ? Is there a very big difference vs. 454. Would i get bettter milleage with a 350 or with a 454. Tks
Re: Gm 350 vs. 454 Tucker Motorsports 8-3-04  
Probubly your cheapest, quickest, and maybe best solution would be to go with a 'GEAR-VENDORS' over/under drive. Give them a call at 1-800-999-9555. The gear splitter allowes you to downshift or upshift using half gears. I'm not a vendor of Gear Vendors, just a confirmed user. I use them in my rase cars. Good luck...David
Re: Gm 350 vs. 454 Bob 2-17-02  
Depends on gearing, I had 350 in a 73 22 class A and had no probs. And depends what kind of hills,but 454 would have an advantage. Pulling a lot of hills,make sure of trans cooler, and or oil coolers.
I am looking to buy a 26' Class C motorhome (1984). It as only 40,000 miles. It as a 350 for motor and i am wondering if it's strong enough to go up hill pulling a 2000pds boat.Any opinion ? Is there a very big difference vs. 454. Would i get bettter milleage with a 350 or with a 454. Tks
Re: Gm 350 vs. 454 Harry 2-18-02  
I have a 34 ft. Bounder with a 454 in it that I tow a Chevy, Cavilier with and it handles the hill very well. I owned a 25 ft. class C with a Chevy 400 before the Bounder and I like the 454 much better.The 454 is much better on the hills and my gas milage is even slightly better. I also had a vapor locking problem with the 400 which I no longer have with the 454. I am looking to buy a 26' Class C motorhome (1984). It as only 40,000 miles. It as a 350 for motor and i am wondering if it's strong enough to go up hill pulling a 2000pds boat.Any opinion ? Is there a very big difference vs. 454. Would i get bettter milleage with a 350 or with a 454. Tks
Re: Gm 350 vs. 454 RobertJ 2-17-02  
If you're thinking of pulling anything at all you really need the torque that the 454 is going to offer over the 350. Myself, I wouldn't own a vehicle that large with a SBC as they just don't have the torque required for a motorhome application. No matter how close they seem in HP, the torque makes all the difference. I pull a 3200 pound Jeep behind my 34' Class A with a fuel injected 454 and sometimes I wish I had more. Gas milage will not be noticably different with the 454 vs 350 due to the fact that the 350 will be completly overworked when pulling a trailor. In fact, often the larger motor will get BETTER gas milage. Save yourself the headache and look for a used motorhome with a larger motor.

Depends on gearing, I had 350 in a 73 22 class A and had no probs. And depends what kind of hills,but 454 would have an advantage. Pulling a lot of hills,make sure of trans cooler, and or oil coolers.
I am looking to buy a 26' Class C motorhome (1984). It as only 40,000 miles. It as a 350 for motor and i am wondering if it's strong enough to go up hill pulling a 2000pds boat.Any opinion ? Is there a very big difference vs. 454. Would i get bettter milleage with a 350 or with a 454. Tks
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