1968 Corvette 427 Tripower engine
Thread Starter
Heel & Toe
Joined: Jul 2011
Posts: 21
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1968 Corvette 427 Tripower engine
Hey, I have a corvette 427 tripower l71 (tank sticker), and I need some engine advice. I need a new engine for this car, and I was thinking about putting a new chevy 427 engine inside of it. http://www.automotix.net/engines/196...c_427lb_3.html.
1. Will the tripower intake fit onto this engine, or does it only fit on the original block made for this car?
2. What is the difference between this engine and the original engine. This is a rebuilt chevy 427 engine made for 66-69.
1. Will the tripower intake fit onto this engine, or does it only fit on the original block made for this car?
2. What is the difference between this engine and the original engine. This is a rebuilt chevy 427 engine made for 66-69.
Drifting
Joined: Oct 2007
Posts: 1,317
Likes: 22
From: Marina CA
L-71's were 4 bolt main block and rectangular port heads. That engine most likely is a 2 bolt main block and has oval port heads. For that price it's most likely a 390 hp engine.
You need to find out more about it to learn what it actually is. Casting numbers will be a big help.
Why can't your L-71 be rebuilt?
You need to find out more about it to learn what it actually is. Casting numbers will be a big help.
Why can't your L-71 be rebuilt?
Last edited by 1Fordman; Aug 17, 2011 at 11:49 PM.
Thread Starter
Heel & Toe
Joined: Jul 2011
Posts: 21
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L-71's were 4 bolt main block and rectangular port heads. That engine most likely is a 2 bolt main block and has oval port heads. For that price it's most likely a 390 hp engine.
You need to find out more about it to learn what it actually is. Casting numbers will be a big help.
Why can't your L-71 be rebuilt?
You need to find out more about it to learn what it actually is. Casting numbers will be a big help.
Why can't your L-71 be rebuilt?
Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
That looks like a generic, low cost, possibly low quality long block. At that price I'd be very suspicious. Whether it 'fits' or not might be the least of your worries.
By the nature of your question, I'm guessing you don't have much experience with engines. WHY do you need a complete new engine?
By the nature of your question, I'm guessing you don't have much experience with engines. WHY do you need a complete new engine?
Team Owner
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From: Southbound
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Thread Starter
Heel & Toe
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Burning Brakes
Joined: Jan 2010
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From: Rexburg Idaho
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Le Mans Master
Joined: Sep 2004
Posts: 5,116
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From: Livonia MI
Think I'd be a little suspicious of a BB short block for that kind of money. Since your engines not original anyway, probably go bigger with a 4 bbl. Tri powers look pretty, but a well set up Q-Jet usually spank's em'. Just got an e-mail from Speedway Motors and has they're Blueprint series 496 100% crate motor for $4500 bucks. Look's like a good one, with all the right stuff. Built my share of engines, and believe me, you can burn through lot's of cash doing it right.
Drifting
Joined: Dec 2009
Posts: 1,349
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From: Porterville Ca
You get what you pay for. Yes your tripower will fit. You WANT a Hi-perf Pass engine, it's easily identified by the "Hi Perf Pass" casting on the driver's side rear behind the cylinder head. What's is wrong with yours? Watch out for "Truck" motors, that's not what you want. Let us know why you think you need an engine, and we'll steer you in the right direction...
Thread Starter
Heel & Toe
Joined: Jul 2011
Posts: 21
Likes: 0
You get what you pay for. Yes your tripower will fit. You WANT a Hi-perf Pass engine, it's easily identified by the "Hi Perf Pass" casting on the driver's side rear behind the cylinder head. What's is wrong with yours? Watch out for "Truck" motors, that's not what you want. Let us know why you think you need an engine, and we'll steer you in the right direction...
Racer
Joined: Mar 2009
Posts: 331
Likes: 1
From: Brooklin Ontario
This car is a project car, and according to the tank sticker it is an L71 1968 Corvette 427 Tripower. The engine in it is shot and it is not original. It is correct though. My choices are either to rebuild this one, or buy a new one. I want to keep this car very original, but financially it cost a lot more to rebuild the engine than buy a new one.
My troubles revolve around set up with new comp cam and the tripowers. Making big power but I think its running lean. I am having trouble getting help/knowledge.
My vote, new short and rebuild original to spec and fix the numbers.
Good Luck, Rog.
Drifting
Joined: Aug 2005
Posts: 1,682
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From: League City TX
This car is a project car, and according to the tank sticker it is an L71 1968 Corvette 427 Tripower. The engine in it is shot and it is not original. It is correct though. My choices are either to rebuild this one, or buy a new one. I want to keep this car very original, but financially it cost a lot more to rebuild the engine than buy a new one.
You own a very desirable car. Don't cheap out on the engine.
Race Director
Joined: Jul 2001
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This car is a project car, and according to the tank sticker it is an L71 1968 Corvette 427 Tripower. The engine in it is shot and it is not original. It is correct though. My choices are either to rebuild this one, or buy a new one. I want to keep this car very original, but financially it cost a lot more to rebuild the engine than buy a new one.
Team Owner
Joined: Jun 2000
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From: Southbound
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$1667 + 499 + 175 = $2341 and that may not get it to your door. You will then have the expense of shipping your core back to them.
You should be able to rebuild your existing engine for $2341 or less.
Your choice.
You should be able to rebuild your existing engine for $2341 or less.
Your choice.
Burning Brakes
Joined: Jan 2010
Posts: 958
Likes: 88
From: Rexburg Idaho
Found myself in the same situation. 69 tripower L68. The motor is correct but not original. I wanted to go faster which I thought might be hard on the L68 2 bolt. So I had a new short block built and put my heads, intake, and carbs on. Now I have a car to play with and a correct block to rebuild when time and cash allow. Added bonus if your block is really correct enough you can restamp the correct serial and now you have "numbers matching". "HI PERF PASS" stamped block cost me $400 I think thats a good price. The cost of the rest depends on what you want. In the end I spent $6000. Sure wish I could drive it!
My troubles revolve around set up with new comp cam and the tripowers. Making big power but I think its running lean. I am having trouble getting help/knowledge.
My vote, new short and rebuild original to spec and fix the numbers.
Good Luck, Rog.
My troubles revolve around set up with new comp cam and the tripowers. Making big power but I think its running lean. I am having trouble getting help/knowledge.
My vote, new short and rebuild original to spec and fix the numbers.
Good Luck, Rog.
