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Which Engine?

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Bigtard10

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I am trying to decide what engine I should put into my '77 k5 blazer. This will be in the future since I don't have the money to do it yet. I am stuck between the Chevy ZZ 575, the classic LS9, or a Duramax. Or any other engines you recommend? Also, I don't have the stock tranny from factory. The previous owner upgraded to a 700R4 transmission. Thank you!
 
Will the 700r4 fit the LS9 or Duramax? I don't think so which means a bigger budget!
 
Bigtard10 said:
I am trying to decide what engine I should put into my '77 k5 blazer. This will be in the future since I don't have the money to do it yet. I am stuck between the Chevy ZZ 575, the classic LS9, or a Duramax. Or any other engines you recommend? Also, I don't have the stock tranny from factory. The previous owner upgraded to a 700R4 transmission. Thank you!
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If you have $ 26,000.00 to drop on a l
Bigtard10 said:
I am trying to decide what engine I should put into my '77 k5 blazer. This will be in the future since I don't have the money to do it yet. I am stuck between the Chevy ZZ 575, the classic LS9, or a Duramax. Or any other engines you recommend? Also, I don't have the stock tranny from factory. The previous owner upgraded to a 700R4 transmission. Thank you!
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If you have $26,000.00 to spend on LS9,then you'll have left over change to buy one of those fancy new 6speed auto's they got out w/ the paddle shifters.Might as well get a cro-moly tube frame built and a carbon fiber body.All kidding aside, I like the 502 big block tow motor. They don't have a lot of HP, but over 500 ft. lbs. just off idle sounds good to me.And if you need more power ,you can always swap heads /cam later for up to 600+ hp.
 
LS9. Big blocks are thirsty, and I'd be worried about a Duramax twisting the frame in a K5.
 
rjfguitar said:
LS9. Big blocks are thirsty, and I'd be worried about a Duramax twisting the frame in a K5.
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$5000.00 for 502 vs $26,000 for supercharged LS9-you'd have $21,000.00 left over for gas LOL, of course the LSengine is superior in every way. If a duramax might bend frame then so will LS9 . If money no object , get a LSX twin turbo built,I don't know how truck is being used ect., but you would think that more cubes would be better for a 4x4 app.
 
If you've realistically budgeted the cost of these powertrain options and are still on board, it almost doesn't matter. None of those engine choices are budget options, so get what you want and make it work. Unless it's built, that 700r4 isn't going to survive behind any of those engines for long anyway, so figure on a different transmission.
 
700r4 will not survive behind any of those engines. Though it will bolt up to any of them with the proper torque converter.

Each of those options are so different from each other that its really impossible to suggest one.
 
Holy shit is this for real? To say your "stuck" between those three engines? They are so different I think you need to really take a minute and figure out what you want, what you NEED. No wonder you say you dont have the money now. if you think you want 26,000 dollar engine.
They are so far apart there isn't even a basic way to compare them.
You need to consider some things first.
What are your goals? Total drivetrain setup( t- case, different, gears, etc) Tire size? How much are you going to mod the rest of the truck to cope with the massive power upgrade? Boxed frame? Roll cage? Tube chassis? It's just not that you easy. Your not talking about a weekend engine swap here. God I could go on and on. But overall this feels silly and fake.

Secondly who said a LS is superior in every way? To what? the BBC? The duramax? Can you look in the mirror and honestly convince yourself of that? That simply just isn't true. Almost as ridiculous as the OP. Not even going to start on that one.
 
beags86 said:
Holy shit is this for real? To say your "stuck" between those three engines? They are so different I think you need to really take a minute and figure out what you want, what you NEED. No wonder you say you dont have the money now. if you think you want 26,000 dollar engine.
They are so far apart there isn't even a basic way to compare them.
You need to consider some things first.
What are your goals? Total drivetrain setup( t- case, different, gears, etc) Tire size? How much are you going to mod the rest of the truck to cope with the massive power upgrade? Boxed frame? Roll cage? Tube chassis? It's just not that you easy. Your not talking about a weekend engine swap here. God I could go on and on. But overall this feels silly and fake.

Secondly who said a LS is superior in every way? To what? the BBC? The duramax? Can you look in the mirror and honestly convince yourself of that? That simply just isn't true. Almost as ridiculous as the OP. Not even going to start on that one.
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Well the new technology is SUPOSED to be superior on the new LS based engines.And that is why a lot of guys are running them,I think. What with there new fangled 6 bolt main deep skirt block and awesome flowing heads,ect. ,but those are mostly for a high RPM application,right? I have never owned one , or a diesel ,so I am no expert and can only say what I have heard ,but yes I can say with looking at the facts that an LS9 engine that is pretty much based on the engines that run the 24hrs of lemans IS a superior engine to a big block 572. Just too rich for my blood!I, myself like the gen1 small and big block chevy.I always like to shut them ford boys up with the fact that the fastest v8 is the smallblock chevy built by Kenny Duttwieler for George Poteet/Bonneville racer .But we are talking about a 4x4 , not some high winding racing deal , so the TORQUE monster at low to mid range rpm is gonna win-so arguably it is the Duramax that wins by popular opinion. So beags86 , do you think that a big block chevy can be built to outperform a Duramax diesel?
 
Still a loaded question there. Lots of differences to consider. Turbo vs na. gas vs diesel. Displacement. Engine technology - The duramax uses multi valves. Out perform how? Pulling a load? Torque production? Horsepower? Speed? It all depends. And you can make the argument sway either way. I like them both!
 
beags86 said:
Still a loaded question there. Lots of differences to consider. Turbo vs na. gas vs diesel. Displacement. Engine technology - The duramax uses multi valves. Out perform how? Pulling a load? Torque production? Horsepower? Speed? It all depends. And you can make the argument sway either way. I like them both!
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Sounds like a good idea for a new thread to me.As far as the dude that has posted this thread who has been strangly absent(bigtard?) , hows about telling us something more about the vehicle use?
 
He is a 17yr old kid with big dreams. We were all there once.
 
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I say, go with 528 cubic inch crate Hemi from Mopor Performance. 610 HP/650 LBS torque.
 
4xfrankie said:
Sounds like a good idea for a new thread to me.As far as the dude that has posted this thread who has been strangly absent(bigtard?) , hows about telling us something more about the vehicle use?
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geuss that was a bad idealol
 
4xfrankie said:
Sounds like a good idea for a new thread to me.As far as the dude that has posted this thread who has been strangly absent(bigtard?) , hows about telling us something more about the vehicle use?
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Ya sorry I was absent. This is my first time I was able to get online. I was working most of yesterday. Yes I know the engines are all so far apart. But these are my favorite engines from each respective category. Diesel, Boosted, and Big Block. And yeah any of these engines will require heavy modification to the vehicle and I am prepared for that. Right now the use is just for getting me to school and work. Once I get some other things fixed on the truck I will start off-roading more. And yeah I got some big dreams hahaha, but every guy with a bad ass truck has 'em. How do you expect to get anywhere in life with out goals? hahahaha. thank you to everyone the responded!
 
I'm a big block guy, I'd say a mild 454. No need to go crazy, I've had many mild 454s and always had enough torque to do what I wanted to do. Not listed, but why not the 8100 Vortec? IMO kinda best of both worlds, big block torque and LS heads, fuel and computer technology. Most the LS engines make their power higher in the RPM range than a traditional small/big block, and maybe for mud be fine, or with real low gears. Im just not sold on the LS bandwagon.
 
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