v8 400 4v Lt4
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v8 400 4v Lt4
I just found out my engine is a Lt4 are these any good
dade1989- G3GM Member
- Street Cred : 0
Re: v8 400 4v Lt4
A quick google search found this.
http://www.grandsportregistry.com/lt1vslt4.htm
http://www.grandsportregistry.com/lt1vslt4.htm
Brainstain- Donating Member
- Street Cred : 8
Re: v8 400 4v Lt4
That link has absolutely nothing to do with the lt4 in the OP's car.
My engine is also an lt4. It is a low compression 400 ci small block. I haven't upgraded mine yet, and while it runs good and smooth, 1st gear is the most impressive thing about it. Once it shifts into 2nd, my Hemi Charger smokes it.
This engine is one of the reasons people don't think of 70's era cars as performance oriented. It only had 175 horsepower factory rating. There are 4 cylinder engines that have similar ratings in modern cars.
The thing this engine does have is torque. Over 300 ft/lbs in factory trim.
You can substantially increase performance with a good set of cylinder heads and a cam to match your intended usage. As usual, this is dependant on the condition of the rotating assembly. I wouldn't do too much with the stock bottom end, but you can do enough to make it a fun driver.
My engine is also an lt4. It is a low compression 400 ci small block. I haven't upgraded mine yet, and while it runs good and smooth, 1st gear is the most impressive thing about it. Once it shifts into 2nd, my Hemi Charger smokes it.
This engine is one of the reasons people don't think of 70's era cars as performance oriented. It only had 175 horsepower factory rating. There are 4 cylinder engines that have similar ratings in modern cars.
The thing this engine does have is torque. Over 300 ft/lbs in factory trim.
You can substantially increase performance with a good set of cylinder heads and a cam to match your intended usage. As usual, this is dependant on the condition of the rotating assembly. I wouldn't do too much with the stock bottom end, but you can do enough to make it a fun driver.
bigredlaguna- G3GM Senior Member
- Street Cred : 53
Re: v8 400 4v Lt4
Ah. Sorry, I was mislead by the term LT4 and thought he had a later model engine.
Brainstain- Donating Member
- Street Cred : 8
Re: v8 400 4v Lt4
The 400 has two freeze plugs on each side of the block instead of three like the others which is one way to ident it. I have a 400 ( now 408) in my '74, which was in my '77 Elco for 20 years. They do have some issues, but mine never has ( so far)
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pila- Donating Member
- Street Cred : 43
Re: v8 400 4v Lt4
pila wrote:The 400 has two freeze plugs on each side of the block instead of three like the others which is one way to ident it. I have a 400 ( now 408) in my '74, which was in my '77 Elco for 20 years. They do have some issues, but mine never has ( so far)![]()
i just sold one of these,2 freeze plug 400s. the guy put it in a 65 skylark.$h!+$ and gets
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1973 454 MONTE- Donating Member
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