What does LT-1 stand for
Safety Car
Joined: Nov 2001
Posts: 4,166
Likes: 2
From: Las Vegas NV
Re: What does LT-1 stand for (Tom73)
Nothing. Just an RPO code for an engine.
tom...
tom...
Like several GM products known for their option code........L-88, Z-28, Z-71, etc.
But I do like the idea of Light the Tires 1 more time!!!
Instructor
Joined: Jan 2002
Posts: 211
Likes: 0
From: Honolulu Hawaii
Re: What does LT-1 stand for (Alwyn678)
Alwyn678, at least on my '72 it stands for: 255 H.P.(NET H.P. at RW),Turbo-Fire 350,Special cam, 4 Bolt mains, solid lifters, internal forged materials, crank/pistons etc., fully transitorized ignition, high rise aluminium intake,4 BBL Holley 4150, # 6239 (800 CFM), finned aluminiun valve covers, open element air filter, with choice of either wide ratio or close ratio tranny, BB Hood with LT-1 striping, special console Id, 6,500 RPM tach, and a 3:70 Posi rear pumpkin. The RPO Code LT-1 was used on '70-'72 vette engines,...of over 66,000 vettes produced during '70-'72 production period less than 5,000 were of the LT-1 RPO code,.although I know nothing of C4 & C5 vettes, I do know that they used the LT-1 RPO code designation on some of the early-mid 90's vette engines,..I'm not sure but I don't think it is an RPO code for any of the C5 generation engines. Tom :chevy Save The Wave!!! :cheers:
Team Owner
Joined: Aug 1999
Posts: 30,995
Likes: 98
From: Ontario
Re: What does LT-1 stand for (Alwyn678)
I do not have a good answer but I have always been intrigued by those RPO codes also. There must be some rhyme or reason to them but....For example when the LT-1 received hydraulic lifters it became the L-82. Not an LT-2 or an LT-1B. I have nevr been able to follow the logic.
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Race Director
Joined: Apr 1999
Posts: 15,134
Likes: 477
From: NM
Re: What does LT-1 stand for (Split Sixty Three)
Alwyn678, at least on my '72 it stands for: 255 H.P.(NET H.P. at RW),Turbo-Fire 350,
tom...
Drifting
Joined: Sep 2000
Posts: 1,355
Likes: 0
From: Germantown Maryland
Re: What does LT-1 stand for (Tom73)
Alwyn678, at least on my '72 it stands for: 255 H.P.(NET H.P. at RW),Turbo-Fire 350,
Sorry but that should be [b]255 H.P.(NET H.P. at the flywheel)</b...
Sorry but that should be [b]255 H.P.(NET H.P. at the flywheel)</b...
Instructor
Joined: Jan 2002
Posts: 211
Likes: 0
From: Honolulu Hawaii
Re: What does LT-1 stand for (Tom73)
Your right on Tom '73 and the other posters , I stand corrected, it was net 255 H.P. at the flywheel only with all accessories etc. hooked on instead of the old gross horsepower without anything bleeding off those ponies that the '70 LT-1 370 H.P. with 11:1 compression ('71/'72 dropped to around 9:5, 9:1 compression to run regular gas) and the '71 was rated at 330 gross H.P. I believe except the '71 did have a 270 net H.P. rating as it was the cross over rating year,...for the other poster who asked what's special about the LT-1?,..just drive one and you'll see,..it's not much compared to today's technology and aftermarket changeouts but in '70-'72, 30+ years ago, these original factory set-up small blocks could stay right up there with some of the factory BB rat motors in the quarter and at the track courses due to higher revs, lighter block and rear end ratios which in those days gave the car great handling too. Guess that's why they called it the mouse that roared!! Thanks for keeping me straight!!! Tom Save The Wave!!! :cheers:
