I am sorry I don't know where my brain went. 
Engine Numbers, Simple questions.
Thread Starter
Racer
Joined: Apr 2007
Posts: 360
Likes: 0
Engine Numbers, Simple questions.
I am not much of a technical gear head when it comes to numbers and specifics.
Here is what I was told about the current engine in the vette.
"The casting number is 3970010 and the engine suffix is ML07800."
What exactly does this mean?
It is a GM crate motor.
Another thing I have been trying to figure out. L82 models had 290 hp, right? On my center console there is a little, I don't know what you would call it, but it's right under the shifter and the a/c controls. It says, 350 Cubic Inches, 285 LBS FT. TORQUE, 9.0:1 COMP RATIO. The last refers to the rear end gears, correct? My only question is it says 285 Torque. I always though horse power and torque were generally the same. Why would the numbers be different? I know those numbers refer to the original engine and not the current one, which is why I am hoping some one can help me further identify the current engine.
I know it's some pretty basic stuff, but I am just learning and a bit turned around at the moment.
Here is what I was told about the current engine in the vette.
"The casting number is 3970010 and the engine suffix is ML07800."
What exactly does this mean?
It is a GM crate motor.
Another thing I have been trying to figure out. L82 models had 290 hp, right? On my center console there is a little, I don't know what you would call it, but it's right under the shifter and the a/c controls. It says, 350 Cubic Inches, 285 LBS FT. TORQUE, 9.0:1 COMP RATIO. The last refers to the rear end gears, correct? My only question is it says 285 Torque. I always though horse power and torque were generally the same. Why would the numbers be different? I know those numbers refer to the original engine and not the current one, which is why I am hoping some one can help me further identify the current engine.
I know it's some pretty basic stuff, but I am just learning and a bit turned around at the moment.
Team Owner
Joined: Feb 2005
Posts: 32,519
Likes: 1
From: central America
St. Jude Donor '08-'09
Another thing I have been trying to figure out. L82 models had 290 hp, right?
On my center console there is a little, I don't know what you would call it, but it's right under the shifter and the a/c controls. It says, 350 Cubic Inches, 285 LBS FT. TORQUE, 9.0:1 COMP RATIO. The last refers to the rear end gears, correct?
My only question is it says 285 Torque. I always though horse power and torque were generally the same. Why would the numbers be different? I know those numbers refer to the original engine and not the current one, which is why I am hoping some one can help me further identify the current engine.
I know it's some pretty basic stuff, but I am just learning and a bit turned around at the moment.
I know it's some pretty basic stuff, but I am just learning and a bit turned around at the moment.
Horsepower = (torque*RPM)/5252
So at 5252 rpm, the horsepower will equal the torque, but only at that spot.
Hopefully someone else can give you more info on the block.
Drifting
Joined: Jan 2004
Posts: 1,991
Likes: 3
From: Piscataway NJ
[QUOTE=72 stingray owner;1560700960]It means your block has 4 bolt mains to start with. It was in numerous applications (from cars to trucks).
I have to disagree 010 blocks came in 2 or 4 bolt mains.
I have to disagree 010 blocks came in 2 or 4 bolt mains.
Team Owner
Joined: Feb 2005
Posts: 32,519
Likes: 1
From: central America
St. Jude Donor '08-'09
[QUOTE=Artsvette73;1560701119]That's true, but it seems that there's a majority of them out there that have 4 bolt mains (or maybe that's the general perception).
Instructor
Joined: Feb 2007
Posts: 114
Likes: 18
From: McKinney TX
Casting Number 3970010
If you find this casting in a 1969 it almost certainly is a four bolt main block. However this casting was used for over ten years and some were four bolt, some were two bolt. Mine was a two bolt block.
Racer
Joined: Dec 2006
Posts: 281
Likes: 0
From: Nashville Tennessee
St. Jude Donor '10
L-82 H.P. Rating
I believe the L-82 350c.i. engine was rated at 220 (net) h.p.
I don't know for sure about if that number changed for different years...but I know for sure that is the rating for a '77 model.
As far as the L-82 vs L-48...the L-48 reaches its peak h.p. (180) at lower rpms and actually gives more torque at lower rpms than the L-82.
Someone please correct me if I am showing my ignorance...lol
I don't know for sure about if that number changed for different years...but I know for sure that is the rating for a '77 model.
As far as the L-82 vs L-48...the L-48 reaches its peak h.p. (180) at lower rpms and actually gives more torque at lower rpms than the L-82.
Someone please correct me if I am showing my ignorance...lol
Last edited by C3bdj1; Jun 17, 2007 at 07:28 AM.
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