lt1 crate
Tech Droid
Joined: Aug 2005
Posts: 9,215
From: North East PA
RE: lt1 crate
GM Performance Parts sells sells a 383 crate engine but it is not an LT1, it is a regular chevy small block "zz383/425". It is rated @ 425 HP @ 5400 RPM.
http://www.gmgoodwrench.com/perfpartsjsp/home.jsp
http://www.gmgoodwrench.com/perfpartsjsp/home.jsp
2nd Gear member
Joined: Nov 2005
Posts: 572
From:
RE: lt1 crate
Just realize that you should shop around for prices for Gm crate engines. Some dealers give big discounts. For example, when I bought the block for my C5R the GMPP list price was $8900 but I got it for $5300 by shopping it.
Jan. '06 HOT ROD has two ads: they don't number the pages with only ads, but counting from page 110 which is numbered:
Page 118 if they numbered it:
Burt Greenwood Chevrolet ad for GM CRATE ENGINES (800-867-3010)
In the small block chevy section, they list:
350 cubes 290 HP $1619
350/330 HP $2,379
ZZ4 350/355 HP $3779
385 cubes/385 HP - $4379
ZZ383/425 HP - $4779
page 120 Iif they numnbered them)
Ultra Street ad (800-295-7142)
434 cubic inch small block 625 HP - $7995
472 cubic inch small block 675 HP $10,950
There are lots of other crate engine companies. Check GM High Performance, Super Chevy, and Hot Rod.
Just realize that the HP ratings for crate engines are generally given as engine dyno test #s and are not quite equivalent measures compared to flywheel ratings for cars from the factory or to chassi dyno readings.
For the ZZ383 425 rating, this is what I would expect:
On an engine dyno test: 425 HP
Equivalent flywheel rating of a factory car with the same engine, the engine in the car but measured at the flywheel: 405 HP
Rear wheel horsepower measured through a 6-speed manual and differential on a Mustang of Dynojet: 355-360 RWHP.
Jan. '06 HOT ROD has two ads: they don't number the pages with only ads, but counting from page 110 which is numbered:
Page 118 if they numbered it:
Burt Greenwood Chevrolet ad for GM CRATE ENGINES (800-867-3010)
In the small block chevy section, they list:
350 cubes 290 HP $1619
350/330 HP $2,379
ZZ4 350/355 HP $3779
385 cubes/385 HP - $4379
ZZ383/425 HP - $4779
page 120 Iif they numnbered them)
Ultra Street ad (800-295-7142)
434 cubic inch small block 625 HP - $7995
472 cubic inch small block 675 HP $10,950
There are lots of other crate engine companies. Check GM High Performance, Super Chevy, and Hot Rod.
Just realize that the HP ratings for crate engines are generally given as engine dyno test #s and are not quite equivalent measures compared to flywheel ratings for cars from the factory or to chassi dyno readings.
For the ZZ383 425 rating, this is what I would expect:
On an engine dyno test: 425 HP
Equivalent flywheel rating of a factory car with the same engine, the engine in the car but measured at the flywheel: 405 HP
Rear wheel horsepower measured through a 6-speed manual and differential on a Mustang of Dynojet: 355-360 RWHP.
1st Gear Member
Joined: Sep 2005
Posts: 275
From:
RE: lt1 crate
Try www.gmpartsdirect.com. They usually have pretty good prices, but you pay a fortune in S&H.
Keep in mind that if it's "just a 383ci," then it probably won't pass emissions.
Keep in mind that if it's "just a 383ci," then it probably won't pass emissions.
2nd Gear member
Joined: Nov 2005
Posts: 572
From:
RE: lt1 crate
I've seen some ZZ crate engines that pass emissions and visuals, too, if they are fuel injected. The carbed ones I think you could run only in a car old enough that in had a carb from the factory. At least here in NC, it doesn't matter ('80 models and older doesn't have to pass emissions).
Fuel injected crate engines usually $1500 of so more and there is less selection of them, ( higher price is mostly for the computer cont5roller that comes with them) but run clean enough (through cats) to pass emissions for most recent years. Not sure they could do '05-'06 levels although with cats and some tuning, maybe.
As to visual inspection where that counts, I've seen various clever disguises - but on the original or original looking valve covers, etc. The main thing in states where it matters that flunks you is headers and most crate engines come with factory cast iron manifolds so they look "stock enough." Paint it up right, get it grimmy and greasy enough, and it looks "stock" enough someone will pass it.
Fuel injected crate engines usually $1500 of so more and there is less selection of them, ( higher price is mostly for the computer cont5roller that comes with them) but run clean enough (through cats) to pass emissions for most recent years. Not sure they could do '05-'06 levels although with cats and some tuning, maybe.
As to visual inspection where that counts, I've seen various clever disguises - but on the original or original looking valve covers, etc. The main thing in states where it matters that flunks you is headers and most crate engines come with factory cast iron manifolds so they look "stock enough." Paint it up right, get it grimmy and greasy enough, and it looks "stock" enough someone will pass it.
1st Gear Member
Joined: Sep 2005
Posts: 275
From:
RE: lt1 crate
ORIGINAL: Lee Willis
I've seen some ZZ crate engines that pass emissions and visuals, too, if they are fuel injected. The carbed ones I think you could run only in a car old enough that in had a carb from the factory. At least here in NC, it doesn't matter ('80 models and older doesn't have to pass emissions).
Fuel injected crate engines usually $1500 of so more and there is less selection of them, ( higher price is mostly for the computer cont5roller that comes with them) but run clean enough (through cats) to pass emissions for most recent years. Not sure they could do '05-'06 levels although with cats and some tuning, maybe.
As to visual inspection where that counts, I've seen various clever disguises - but on the original or original looking valve covers, etc. The main thing in states where it matters that flunks you is headers and most crate engines come with factory cast iron manifolds so they look "stock enough." Paint it up right, get it grimmy and greasy enough, and it looks "stock" enough someone will pass it.
I've seen some ZZ crate engines that pass emissions and visuals, too, if they are fuel injected. The carbed ones I think you could run only in a car old enough that in had a carb from the factory. At least here in NC, it doesn't matter ('80 models and older doesn't have to pass emissions).
Fuel injected crate engines usually $1500 of so more and there is less selection of them, ( higher price is mostly for the computer cont5roller that comes with them) but run clean enough (through cats) to pass emissions for most recent years. Not sure they could do '05-'06 levels although with cats and some tuning, maybe.
As to visual inspection where that counts, I've seen various clever disguises - but on the original or original looking valve covers, etc. The main thing in states where it matters that flunks you is headers and most crate engines come with factory cast iron manifolds so they look "stock enough." Paint it up right, get it grimmy and greasy enough, and it looks "stock" enough someone will pass it.
I think GM mentions that a lot of those motors can only be put into cars 20 years older or more, due to emissions constraints.
2nd Gear member
Joined: Nov 2005
Posts: 572
From:
RE: lt1 crate
Yeah, I really would not want to try to pass emissions at levels since 95 or so with a carb engine. Even if they passed it on visual, it would be nearly impossible. Carbs just don't allow the fuel and air to mix well or burn clean enough.
1st Gear Member
Joined: Sep 2005
Posts: 275
From:
RE: lt1 crate
ORIGINAL: Lee Willis
Yeah, I really would not want to try to pass emissions at levels since 95 or so with a carb engine. Even if they passed it on visual, it would be nearly impossible. Carbs just don't allow the fuel and air to mix well or burn clean enough.
Yeah, I really would not want to try to pass emissions at levels since 95 or so with a carb engine. Even if they passed it on visual, it would be nearly impossible. Carbs just don't allow the fuel and air to mix well or burn clean enough.
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