Engine block number decode??
Thread Starter
7th Gear
Joined: Jun 2002
Posts: 7
Likes: 0
From: Manchester England
Engine block number decode??
Engine block number.
Further to earlier posts, I have now found the engine number stamped on the pad just forward of the passenger side cylinder head.
It is " T0412TRH "
According to the Corvette black book the number for a 1971 454 LS5 with auto box should start with "T" for Tonawanda engine plant and end in "CPJ" so therefore its had an engine swap.
Does this number mean anything to anybody or could you point me in the right direction?
Does the "T" in thr TRH mean its from a truck and if so is this a bad thing.
I think Sherlock Holmes would struggle with this one! :0)
Cheers
Paul
:(
[Modified by ashy22, 9:24 PM 8/6/2002]
Further to earlier posts, I have now found the engine number stamped on the pad just forward of the passenger side cylinder head.
It is " T0412TRH "
According to the Corvette black book the number for a 1971 454 LS5 with auto box should start with "T" for Tonawanda engine plant and end in "CPJ" so therefore its had an engine swap.
Does this number mean anything to anybody or could you point me in the right direction?
Does the "T" in thr TRH mean its from a truck and if so is this a bad thing.
I think Sherlock Holmes would struggle with this one! :0)
Cheers
Paul
:(
[Modified by ashy22, 9:24 PM 8/6/2002]
Melting Slicks
Joined: Nov 2001
Posts: 2,214
Likes: 0
From: Casa Grande AZ
Re: Engine block number decode?? (ashy22)
It doesn't mean it's a truck engine but it just so happens to be.
1973 Truck 454 240 LS-4
1974 Truck 454 245 LS-4
1978 Truck 454 250 LF-8
1980 Truck 454 225 LE-8
1973 Truck 454 240 LS-4
1974 Truck 454 245 LS-4
1978 Truck 454 250 LF-8
1980 Truck 454 225 LE-8
Thread Starter
7th Gear
Joined: Jun 2002
Posts: 7
Likes: 0
From: Manchester England
Re: Engine block number decode?? (lbell101)
Thanks for the reply Larry.
So my car is not the 365hp LS5 monster that I thought it was or could the rebuild / replacement have been done in a way that put it back to the right standard. Is there any way for me to find out?
Cheers
Paul :cheers:
So my car is not the 365hp LS5 monster that I thought it was or could the rebuild / replacement have been done in a way that put it back to the right standard. Is there any way for me to find out?
Cheers
Paul :cheers:
Melting Slicks
Joined: May 1999
Posts: 2,897
Likes: 0
From: Moon Township PA
Re: Engine block number decode?? (ashy22)
The only way to know what is in your engine is to tear it down and inspect the crank, pistons, and cam. On the other hand, if you like the way it drives, enjoy it.
Gary
Gary
Thread Starter
7th Gear
Joined: Jun 2002
Posts: 7
Likes: 0
From: Manchester England
Re: Engine block number decode?? (lbell101)
I removed the passenger side rocker cover and found the following cylinder head casting numbers
J/8/74
GM9T
336781
which according to my black book means that I have got a 1974 cylinder head on a 1973 or 1974 big block truck motor, as the block suffix is TRH.
What would I have to do to get the horsepower output to the same level as the LS5 unit that was originally in there? Is there much difference anyway?
Any thoughts guys?
Cheers
Paul
:cheers:
J/8/74
GM9T
336781
which according to my black book means that I have got a 1974 cylinder head on a 1973 or 1974 big block truck motor, as the block suffix is TRH.
What would I have to do to get the horsepower output to the same level as the LS5 unit that was originally in there? Is there much difference anyway?
Any thoughts guys?
Cheers
Paul
:cheers:
Race Director
Joined: Apr 1999
Posts: 15,146
Likes: 477
From: NM
Re: Engine block number decode?? (ashy22)
What would I have to do to get the horsepower output to the same level as the LS5 unit that was originally in there? Is there much difference anyway?
More then likely it is already there or very close. Remember that the 365 hp was a gross hp rating while the others are a Net hp rating.
If you want more bang for the buck, upgrade the cam. That will make a major difference.
tom...
