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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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#31650 03/05/2004 11:04 PM | Joined: Jul 2002 Posts: 188 Member | | Member Joined: Jul 2002 Posts: 188 | I've never paid that much attention to GMC motors since I have a chevy, BUT I'm considering a 48 3/4 t GMC with the 228. I know they had insert bearings and were considered better than a 216. Can youse guys give me any more info, comparisons, hp, torque etc? I have a 56 235 im my 50 3600. | | |
#31651 03/06/2004 3:12 AM | Joined: Jul 2003 Posts: 101 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2003 Posts: 101 | According to a 52 Motors Manual
228 - 183 fp of tq at 1000 RPM & 95 hp @ 3200 RPM
248 - 202 fp of tq at 1000 RPM & 100 hp @ 3100
270 - 222 fp of tq at 1000 RPM & 104 hp @ 3000
302 - 262 fp of tq at 1200 RPM & 156 hp @ 3600
All of the above have the same block just different bore & stroke. | | |
#31652 03/06/2004 3:30 AM | Joined: Jan 2000 Posts: 2,074 'Bolter | | 'Bolter Joined: Jan 2000 Posts: 2,074 | Only GMC I owned was a pickup with the 228 motor, had a cracked head. All the replacement head I ever found were just as cracked. An old machinst told me to pull it out and replace with a Chevy 235. If you can find one with a good head you may be ok. Or buy a new 12 Port!!!!!!! | | |
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