The big block Cadillac is one of the biggest and most underrated V-8 engines ever produced. Although this may have something to do with the fact that Cadillacs so equipped were expensive and unlikely to be torn apart, it probably has a lot more to do with the lack of aftermarket support for these amazing behemoths.
The simplest and cheapest way to bring your Cadillac or up to its full potential is also probably the most distasteful to Caddy enthusiasts. Big block Chevy parts are plentiful, cheap and race-tested and are an easy fit after a little machining.
The Caddy crankshaft has more than enough material to have it off-set ground to. Off-set grinding moves the center of the crankshaft rod pins outward, effectively making the crankshaft's arms longer.
Machining the crank in this way will get you another 35 cubic inches; combined with an. With the crank throws machined, you can now utilize any one of several 6. Callies Compstar H-Beams are bullet-proof and will keep your engine safe above 5, RPM the point at which your stock rods will break. Whatever you do, stay away from those trick full-race aluminum rods that are commonly used in big block Chevys. They're overkill for the RPM range you'll be looking at and are really no stronger.
You can use your engine's original heads, but there's a lot of power to be had by using small-chamber heads with 2.
Cadillac 472/500 engine family
The heads will need some porting work around the bowl area and push-rod pinch. When doing the port work, it might help to think of the big Caddy as you might a diesel engine; they're designed to pull, not rev.
If you're building an all-out race engine, consider replacing your stock iron heads with Bulldog aluminum heads. A really good set of stock ported heads can support over horsepower naturally aspiratedbut aluminum heads will shed over pounds from your engine. Combine those heads with an aluminum Edelbrock Performer intake and a set of headers, and you'll be looking at an axis-of-the-Earth-shifting, cubic inch big block that actually weighs less than an iron-headed small block.
This article was written by the It Still Works team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information. To submit your questions or ideas, or to simply learn more about It Still Works, contact us. Heads You can use your engine's original heads, but there's a lot of power to be had by using small-chamber heads with 2. References Hotrodders: Caddy Page. About the Author This article was written by the It Still Works team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.The Jalopy Journal.
The power output on the varied with the year, I'm thinking it isn't the emission clogged hp version. I will oblivously need something that will handle some power. Any of you guys running a manual valve body on the street in an automatic?
I kinda like the idea of being able to shift an automatic, but not have to use the clutch. My truck won't be setup for drag, although I'd like it to be able to get some use out of it on the track. There is no track in my town though, I'll have to drive 5hrs or so. I am on somewhat of a budget with my truck.
How much would you guys pay for a Cadillac? I think if I do swap the Cadillac engine in, it will be stock or mostly stock, I may put a shot of nitrous on it, but I dobut it.
I will have to change the radiator in my truck, I think a Corvette radiator is a drop in fit, and isn't too costly. GearstixDec 21, Ok, no indication of what kind of truck you are trying to put it in. Mr48chevDec 21, What kind of truck?
CGDec 21, Great Engines and are torque monsters. See if you can get the TH out of the Eldorado the came out of. Parts for them are readily available anywhere and even though the Performance parts are a bit pricier, you can get about anything you want. Price is somewhere above what you want to pay and below what the guy wants to sell it for.
Juztyn00Dec 21, If its HEI, then its a smog engine as far as I know. Use the Turbo as it will withstand the torque over a Even the smog has lots of torque.
Register now to get rid of these ads! The H. I've been looking around for an engine to go in my 41 Plymouth I did notice that the big Caddy motors are around though, and I've always wanted to build one.
The problem is nobody seems to know a lot about them and what I can find elsewhere on the 'net doesn't seem all that reliable. Even cadparts. Then there was the old guy at the car show who said "slap some heads on a and you got yourself a horse motor!
I've heard that the stock bottom end can handle obscene amounts of power, but again, that's just what I've "heard" No first hand experience yet I'm building ait should be really badass. I like how these engines are designed. Try cadillacpower. MattilacSep 28, MusicoSep 28, I had to wait less than a week for somebody to ask about inch Cads being any good.
If you search back a few days you can find a thread about Iron Cad with Iron Crank goes on gas. Yes it did a cubic inch turbocharged gas burning streamliner went well over several times last week at Bonneville and is still running, but not the turbo. Maybe you could contact Specter to see what they think. RichFoxSep 28, Hey man! JonodeckSep 28, Fordillac cooling problems Small. JPG File size: Fordillac's new radiators Small. A lot of those guys ran Cads years ago, and there were some aftermarket parts available at the time.
The head trick is real, but it gives you about compression. Those engines are nothing to laugh at, the late 60s - early 70s Cads would moveand there was no "weight saving" Another advantage for the Caddy An all-iron cad weighs a lot less than an all-iron bbc and about 50 lbs heavier than an all-iron sbc.
I put a stock '76 in a '40 Pontiac Sedan. With a 3. I am putting an Edelbrock Performer manifold on because of the good rep they have. Shaft rockers are really only needed for rpm and up. These engines like to tug, not rev. Rich RogersSep 28, See all 7 photos. High-Torque Street Engines Producing one horsepower per cubic inch has long been an ideal in the performance world.
Remember Chevy crowing about its fuelie motors making a like amount of horsepower in ? The more cubes you have, the easier it generally is to make torque and horsepower.
So what better way to make power than with one of the biggest production-car engines of the modern era: the inch Cadillac of the '70s.
What better way, indeed. Since then, Kruzick has become the Lux leader, making possible the swapping of hundreds of big-cube Cadoos into everything from street rods to musclecars to tow vehicles using a conversion kit he developed "Anchors Away," Aug.
If anyone can do torquey, bulletproof, streetable horsepower for a self-imposed limit of four grand, then Kruzick's the man to pull it off with Cadillac style. Even though he's protective of his secrets don't expect to have a casual conversation about how to build a strokerhe showed us the way to leather-lined horsepower for cheap.
Judging by the number of cool Cads that joined us on Power Tour this year, there's plenty of interest among enthusiasts.
The cube motor, also known as the block the last four digits in the block's part numberwas available in Eldorados from late all the way through ; De Villes got the big 'un in Although a is preferable, the mods we outline here work just as well on a The part number is cast into the block at the top of the bellhousing flange, adjacent to the oil pressure sending unit.
Other, more involved ways to find a include measuring the stroke; at 4. Pull the oil pan and check the crankshafts have a small casting number a or a between the No. The casting number is on the edge of the third counterweight. You won't be able to tell what year the engine is from the casting numbers on the block. You'll have to yank the valve covers or the heads to see which ones you have. For performance applications, and casting heads are preferred. Be careful: mix the wrong-year pistons and heads, and you could end up with a compression ratio of or Despite it geriatric exterior, the Cadillac of Shawn Gilbert is a twin-turbo sleeper ready surprise unsuspecting challengers.
Equipped with a cube Cadillac big block pulled from a junkyard, Gilbert had the car running low second passes with a decidedly lazy 2. The car continued to get quicker and quicker each year as Gilbert honed the big coupe on the backstreets of Ohio.
Eventually, he had the car ripping It's making close to hp at the flywheel so I can only imagine how much power a dedicated Wiseco race piston and rod set up from them would be able to handle. My goal is a sub I never dreamed I would own and build a Cadillac that would be able to run consistent eight second passes yet still drive it on the street, but it happened.
Motivation came from my buddy Poul when he pushed my old car into the sub 9 second zone with the help of a little nitrous. It had a ci Cadillac power plant and would do burnouts with ease! Aside from the racing harness and McMahan Motorsports roll cage, the interior of the Caddy still looks much the same as it did when it rolled off the assembly line more than forty years ago.
Motivation comes from a twin-turbocharged LQ4 LS motor that Gilbert pulled from the junkyard with nearlymiles on it. While the crank is stock, the other internals have been beefed up to withstand the stresses of horsepower and include off-the-shelf Wiseco. Written by Bradley Iger.
All Rights Reserved.See all 2 photos. With their 5-inch bore spacing, Cadillac's and ci engines were the largest-displacement, domestically produced gasoline engines at the time of their production, which spanned the to model years. That record held true until when Dodge bumped the displacement of the Viper's V10 up to 8. Unfortunately, these big engines went into production just as the federal government's demands for tightening emissions went into effect, forcing the manufacturers' Band-Aid approach to meeting them.
During the first half of its production, the and had a Power levels took a dive as well. Where once the mighty To be fair, it's a bit difficult to judge those numbers, because the switch from gross to net horsepower ratings occurred at this time as well. All you really need to know is these engines make torque—and lots of it. They make enough torque to make some diesel guys jealous, and they do it at low engine speeds—just like a diesel.
In spite of this, it's reasonable to wonder why we'd bother building a year-old engine at this point. The engines are still available, they were made with good material, and there is a surprising amount of performance parts available for this platform, so as long as they weren't abused, there is potential to make an impressive amount of power with one.
After years of lurking, we decided to dive headlong into the world of these interesting engines and see what we can make of it.
The Caddy 500 "Other Engine" Build Up
Close Ad. John McGann writer. Share on Facebook Share on Twitter.This easy to install kit comes with everything you need to force feed your Cadillac for big horsepower. See more details below. Sought after by street and show builders the engine is a monster in size and perfect canvas for all sorts of modifications and custom accessories. Topping that list of ad-ons was the BDS supercharger and with renewed interest BDS has brought it back in an easily installed, all in-one kit.
Shown here the unit is designed specifically for this popular application and features a fully polished Stage 1 BDS blower.
Available options include Billet Case, Serpentine drive, 8mm drive and groove pulleys. Blower upgrades stage 2, 3 and 4. We will safeguard your e-mail and only send content you request. We'll send you the most interesting Street Rod articles, news, car features, and videos every week.
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