Engine decode help - Team Camaro Tech
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post #1 of 13 (permalink) Old Aug 22nd, 08, 12:20 PM Thread Starter
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Brian
 
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Engine decode help

Heres what I have....T0516ctb

Heres what I know..T= Tonawanda, 05=May, 16=16th day

Ctb is where I get iffy. It could be 396 it could be 402. It could be from a camaro, a chevelle or just chevrolet. It could be 240 ci or 210 ci. Hp rating of TH or MT.

What is TH And MT? Is there a way to know for sure if its a 396 or 402? Or to know what automobile it was in? As you can see from the above I have tried to find this myself but have fallen a bit short.
Thanks,
Brian

the back of the motor has 3899290 if this means anything.

Last edited by bnbpaintballer; Aug 22nd, 08 at 12:49 PM. Reason: more info
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post #2 of 13 (permalink) Old Aug 22nd, 08, 02:25 PM
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Re: Engine decode help

TH is turbo 400 and the MT is manual trans.
I think the casting maybe 3999290?

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post #3 of 13 (permalink) Old Aug 22nd, 08, 02:54 PM
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AJ
 
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Re: Engine decode help

Quote:
Originally Posted by bnbpaintballer View Post
Heres what I have....T0516ctb

Heres what I know..T= Tonawanda, 05=May, 16=16th day

Ctb is where I get iffy. It could be 396 it could be 402. It could be from a camaro, a chevelle or just chevrolet. It could be 240 ci or 210 ci. Hp rating of TH or MT.

What is TH And MT? Is there a way to know for sure if its a 396 or 402? Or to know what automobile it was in? As you can see from the above I have tried to find this myself but have fallen a bit short.
Thanks,
Brian

the back of the motor has 3899290 if this means anything.
do you mean it could be 240 or 210 HP rating? That really does not make sense if your talking about big block horse power numbers... Or are you saying the trans could be a 240 or 210 hp rating, it kinda throws me off though because you posted TH and MT for the casting pad???
Hope this helps:
3999290....396.......68-69...2 or 4 bolt, Truck
3999290....402.......70-72...2 or 4 bolt, Truck
3999290....402.......72......2 or 4 bolt, Passenger
Courtesy of mortec.com
I go there for ALL engine decoding, unless it's vin specific, then go to CRG...

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post #4 of 13 (permalink) Old Aug 22nd, 08, 02:58 PM Thread Starter
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Re: Engine decode help

The web site I was at posted mt th under the hp column. In a column that was labled CID is where the 210 and 240 listed. So if the th, mt is a trans listing (which was a column over) then the 210 240 is probably the hp rating. IDK that was just what the sight had. I thought that was low also.
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post #5 of 13 (permalink) Old Aug 22nd, 08, 03:00 PM
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Re: Engine decode help

Theres no vin # or any other characters on the block?
I know they can be hard to read but most have a 309MA for example, MA=Manual trans...
Going back to your thread posted on which heads you have, if this motor your posting in this thread has the 402/454 heads and the block could be either a 396 or 402 if the heads say it can be 402/454 this motor must be a 402.
Theres no real difference in a 396 and 402 other than a larger bore, and if you do have a 396 instead of a 402, so what? It's like 6 cubic inches and maybe a fraction more hp.

The only Mustang I'd ever own is a Fender.

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post #6 of 13 (permalink) Old Aug 22nd, 08, 03:08 PM
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Wink Re: Engine decode help

I see "CTB" used as a universal identification for the 1972 402* BB's quite often - that's not how the GM literature reads
It is specifically identified as a passenger vehicle 402/TH400 w/A.I.R. application ...
No manual transmission applications are listed for that suffix for the BB's - there is a 1970 SB using that suffix with a manual application code, may be where the confusion comes in.

* = all post 1969 "Second Design" '396' BB's that start with the "C" suffix were over-bored slightly larger to 402 displacement - even if it says 396 on the fender, it's a 402

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post #7 of 13 (permalink) Old Aug 22nd, 08, 03:09 PM
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Re: Engine decode help

Its a 402. All "396's" made after the 69 model year are actually 402's even though most cars continued the 396 emblems on the fenders. CTB is a 1970 and later code for a car engine (would be TTB or something similar) for a truck application. Its a 1972 402 engine from either a Camaro, Chevelle, or Chevrolet equipped with an automatic transmission. Need to know what the partial VIN is to know which one it is.

Mark Canning
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350/300HP RPO Z11

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post #8 of 13 (permalink) Old Aug 22nd, 08, 03:26 PM Thread Starter
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Re: Engine decode help

I believe the partial vin # is 12b671423. I appreciate you guys helping me out!

I would like to ask another question.. I amgetting this motor with the heads in the other thread, a torquer two intake and an edelbrock carb. It needs a head gasket. I can get it for 750.00. Is this good? I would like to get about 450hp out of it. Can this be done with the above set up and a cam or do I need to replace the intake and heads. From what I read the intake sucks anyway.
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post #9 of 13 (permalink) Old Aug 22nd, 08, 04:19 PM
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Re: Engine decode help

dude, people pay $400-500 for just bare blocks.
Jump on it.
Head gaskets are some what cheap, and easy to do with the motor out of the vehicle, and you get to inspect the cylinder wall condition, type of piston, piston condition...
Replace bot head gaskets though, and every other gasket.
Your correct the intake sucks.
Cam, good compression, all upper end matched to each other you should get 450hp fairly easily.

The only Mustang I'd ever own is a Fender.

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'14 5.0 Mustang
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post #10 of 13 (permalink) Old Aug 22nd, 08, 04:44 PM Thread Starter
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Re: Engine decode help

Are you saying with my stock heads, a different intake and a cam I can get 450hp? That would be awesome!
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post #11 of 13 (permalink) Old Aug 22nd, 08, 05:22 PM
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Re: Engine decode help

Quote:
Originally Posted by bnbpaintballer View Post
Are you saying with my stock heads, a different intake and a cam I can get 450hp?

Not quite!!.....Remember, your 1972 402 is a low compression motor with flat top slugs!....You'll need to up the compression ratio with forged, domed slugs!....Remember, the hottest 396 with all the goodies, was only rated at 375 HP!.....You'd probably have to run the best of the best cylinder heads too!
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post #12 of 13 (permalink) Old Aug 23rd, 08, 09:29 AM Thread Starter
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Re: Engine decode help

Thanks for all the info. I may just keep the 350. I don't the hp rating but from a dig it will spin (single traction) all the way through drive. It will not hook at all. The only thing I dont like is if I am on the freeway running 70 or so and jump on it, it doesn't have any umph. Just a gradual increase. Maybe a 411 gear would help?
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post #13 of 13 (permalink) Old Aug 27th, 08, 12:00 PM
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Re: Engine decode help

Quote:
Originally Posted by bnbpaintballer View Post
I believe the partial vin # is 12b671423.
It's out of a '72 Chevelle built at Baltimore.

JohnZ
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