Re: [Amc-list] Looking for parts & advice.

[Keleigh Hardie <keleigh3000@xxxxxxxxx>]

I have a 4.0 in my Eagle, originally because I got it cheap, only 400 
clams for the engine, complete with all EFI parts and harnesses. It has 
about 50% more power than the stock 258, better mileage and 
driveability, and is less troublesome (less maintenance and oil leaks). 
The 258 has better low end torque, the 4.0 revs better, you pays your 
money and you takes your choice. Overall, I agree with Andrew, a good 
258 w/ the EFI kit will give you most of what a 4.0 upgrade would cost, 
but cheaper and without the hassle of an engine swap. If you really want 
more power, you might consider just the 4.0 head. Or if you really want 
more power, put your 258 crank in a 4.0 block for a 4.9. I hear strokers 
rock!

Keleigh

Sandwich Maker wrote:
> " From: Russell Neyhart <rtneyhart@xxxxxxxxxxxxx>
> " 
> " 
> " Is the 4.0 liter really that much "better" than the 258?  Would anyone 
> " in "normal" driving even notice?  For instance, I have a Howell EFI 
> " setup (not installed yet) so someday the BBD setup will be a nice 
> " conversation piece in my workshop, with the EFI setup would there be 
> " much if any real difference between the two engines, performance or 
> " economy wise?  I have a relatively low mileage engine for the year and 
> " don't see any reason why I'd want to swap it for a 4.0 for regular duty 
> " just putting around town and going to shows.  If there is a thread that 
> " has discussed this already... please point the way!
>
> dunno about the howell, but the 258 with the mopar efi kit was rated
> 160-170 hp.  that makes the jump to 4.0 power a lot smaller and the
> 4.0's cam doesn't have the low-rpm power the 258's does.
>
> if you needed a new engine the 4.0 would be a reasonable choice, but i
> don't think it'd be worth scrapping what you already have.
> ________________________________________________________________________
> Andrew Hay                                  the genius nature
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