3rd Gen / L98 Engine Tech 1982 - 1992 Engine Related

305HO or NOT???

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Old 11-22-2004, 10:33 PM
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305HO or NOT???

Is the 305HO the LG4 or L69? When I did and VIN decoder it showed the my engine is a LG4 but the decals and such on the car says it's a 5.0 HO, so I am a bit confussed. Maybe it's just late and I need to go to bed. LOL

1984 Z28- 8th letter in my VIN is "H".

Did they do something in 1984 that I don't know about?

Thanks
UGLY.....
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Old 11-22-2004, 10:49 PM
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Re: 305HO or NOT???

Hey, i also have a 84 Z28 H.O. the H.O. is the L69 which was 190 hp and the LG4 was the other engine offered for the Z28 rated at 150 hp.

Dave
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Old 11-22-2004, 11:13 PM
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Re: 305HO or NOT???

Dave,
Yeah I know. What I am trying to figure out is why my vin# tells me it's a LG4 with the number eight letter being a "H". If it is a HO it should be a "G" which idicates it's a L69.

All of the decals and such say it's a HO and the VIN says it's a LG4.

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Ugly
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Old 11-23-2004, 12:15 AM
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Re: 305HO or NOT???

you can buy HO decals and slap them on the car.
Is the car fast?
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Old 11-23-2004, 08:46 PM
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Re: 305HO or NOT???

If it's an L69, you will have a dual snorkel air cleaner, your carb will have "DR" secondary metering rods in it, the Y-pipe will be 2 1/4 inch mandrel bent pipe, the catylitic converter will be a Corvette "wide mouth" design with oval entry & exit pipes, four-bolt flange style. It will have a knock sensor screwed into the block on the passenger side water jacket. Your tach will probably show a 5500 RPM red line and will rear to 8000 RPM. Your car will more than likely sport rear disc brakes and a 32mm swaybar.

HTH,
--Dan Burk
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Old 11-23-2004, 10:37 PM
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Re: 305HO or NOT???

Well, The mystery is solved....

It's not the HO. I looked up the casting number on the block and it ended in "SDN" whick tells me it's a LG4. Someone played a sick joke on me and put the decals on it and made me think its the L69.

Thats ok, I'll still keep it, might even leave the decal on the dash just cause it looks cool.

I appreciate everyone's input.

Wonder what else I will find????

Later
Ugly
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Old 11-24-2004, 07:25 AM
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Re: 305HO or NOT???

Another uninformed buyer not checking the Vin for engine type but relying on the sellers info and car badges. Score: Buyer (O) Seller: (1).
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Old 11-24-2004, 05:51 PM
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Re: 305HO or NOT???

Just FYI:

The VIN will show a 7 to designate an L69.

Larry
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Old 11-24-2004, 08:22 PM
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Re: 305HO or NOT???

Originally Posted by ugly84Z28
Well, The mystery is solved....

It's not the HO. I looked up the casting number on the block and it ended in "SDN" whick tells me it's a LG4. Someone played a sick joke on me and put the decals on it and made me think its the L69.
Waitaminute. Since when does the 305 H.O. have its own unique engine casting number? Both the LG4 and L69 use identical engine blocks. The difference for 1984 shortblocks is in the pistons and camshafts.

What could you tell with regards to the clues I gave you?
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Old 11-24-2004, 08:33 PM
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Re: 305HO or NOT???

Just check the Vin number as previously stated, eighth number is (G) for 305 HO.

Last edited by 87DJP2001; 11-24-2004 at 08:41 PM.
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Old 11-24-2004, 08:45 PM
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Re: 305HO or NOT???

Originally Posted by 87DJP2001
Just check the Vin number as previously stated, eighth number is (G) for 305 HO.
As stated in his very first post, he did just that, which is why he was curious and posted in the first place. In the unlikely event someone swapped out the powertrain, I think some independent verification would be in order, by looking for the most obvious of the L69 speed parts.
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Old 11-24-2004, 08:47 PM
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Re: 305HO or NOT???

Did the HO's have the aluminum intake manifold as well?
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Old 11-24-2004, 09:33 PM
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Re: 305HO or NOT???

Originally Posted by Zepher
Did the HO's have the aluminum intake manifold as well?
Yep. They sure did. I sold mine to robvas.
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Old 11-24-2004, 10:21 PM
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Re: 305HO or NOT???

The LG4s had aluminum intakes, too, though, AFAIK. My '81 2nd gen LG4 did.
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Old 11-24-2004, 10:48 PM
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Re: 305HO or NOT???

Originally Posted by 87DJP2001
Just check the Vin number as previously stated, eighth number is (G) for 305 HO.
Originally Posted by ws6transam
Your tach will probably show a 5500 RPM red line and will rear to 8000 RPM. Your car will more than likely sport rear disc brakes and a 32mm swaybar.
I ordered my '83 L69 car from the factory and haven't touched it. Here's what mine has:

The VIN engine code is a 7. I wonder if the digit could have been different for other years?

The tach is a 5000/7000 RPM unit. Again, did they change in later years?

It has rear discs that were an option that could be ordered for any Z/28.
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