Quote:
Originally Posted by 101Volts
As for the Diesel, Just for reference I realize you're talking about another motor and not the 5.7 that some of these G.M cars came with. An engine swap is definitely a possibility,
Thanks.
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A manual transmission does make a big difference if you EOC a lot, leaning a car of that vintage up (if you can) makes a bit of difference if done correctly.
Could check out the hundreds of dollars EFI systems floating around.
The diesels with a manual transmission (5speed variety) should top you out near 30mpg on the highway at low speeds. That is regardless of 5.7 or 6.2, also the 5.7 diesel can be reliable if proper precautions are taken, later goodwrench varieties could live a long time without even a fuel water separator, so one with a fuel water separator would likely be better.
Only benefit to the 5.7 over the 6.2 is if you get it free and because it drops in without motor mount work, beyond that it gets roughly the same FE (if your 6.2 if configured correctly) and is harder to adapt to a MT.
Cheers
Ryan