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Old 05-28-2013, 12:54 PM
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Gm crate motors vs. Custom built

Are gm crate motors really worth the buy?

Or is just better to build your own engine?




Im pretty sure a custom built engine is the way to go for performance

ive heard of tales of gm lying about the hp/tq number of their engines, but not sure if this is true

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Old 05-28-2013, 04:16 PM
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You need to ask yourself, "How much power do I want, and how much money do I have to spend?" first.
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Old 05-28-2013, 05:52 PM
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GM gives a warrantee with their crate motors, and each different model has been designed to perform at a certain level - fast costs more.
Unless your garage is a lot better than mine, there's no warrantee on the one you build yourself. Guys on here can help you pick the right components - remember it all has to work together. Great heads with a lousy intake or the wrong cam won't perform to potential.
If you already have some of the components (assuming they are the right ones), it might be cheaper to build your own. If you don't have anything yet, the crate engine might be the best way (and maybe cheapest) to get you running.
Take into account your experience level - are you confident you know all the ins and outs of building the engine you want? If not, things can get expensive in a hurry.
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Old 05-28-2013, 07:23 PM
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Another big consideration is the amount of time your are willing to wait to get up and running. If you need/want to get your vehicle running in a short time, a crate engine can be installed fairly quickly and often won't require much work to get it working well enough to get on the road. In the case of most GM crate engines, they are well-known combos that work predictably. On the other hand, a custom-built engine takes time for you to pick out the right parts, and it takes time to get it all assembled correctly.

I used a GM 350 crate engine because the old 350 was blown and I needed to get things running in a fairly short time. If there had been no time pressure, I might have considered a custom-built engine. However, I have been very happy with the reliability of the crate engine.

Bruce
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Old 05-28-2013, 08:02 PM
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some crate engine sellers have a very good choice and offer warranty.also they(some) offer dyno sheets for your purchase.
Some places dont tell the truth,ever,,,,
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Old 05-28-2013, 08:10 PM
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This might confuse you Both crate motors and custom built are good. I've had both good ones and both bad. You need to find a reputable builder with a reputation of building good engines. Warranties are nice, but who wants to install an engine twice? Do your homework!
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Old 05-28-2013, 09:10 PM
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My GM crate (ZZ4 350) came straight from the Chevy dealer. I found out that if someone orders a crate engine from a dealer and then walks away from the deal, the dealer is stuck with that engine, GM won't take it back. When I talked to my local Chevy dealer, they had two of them, the ZZ4 turn key that I bought and a ZZ383 long block. They knocked $1000 off the price of either one and the warrantee came from GM.
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Old 05-29-2013, 06:39 AM
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Expedience is the best "reason" to use a crater. Or, perhaps, there's no high quality builder in your area.

If having the "same" engine as the guy next to you is no big deal, craters are good. If you want a unique, high performance engine, a "custom" is the only way to get that.

Jim
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