Re: AMC 4-cylinder in a Spirit (Revisited)

[adh@xxxxxxxxxxxxxxxxx (Sandwich Maker)]

" From: <mail@xxxxxxxxxxxx>
" 
" 
" ---- Sandwich Maker wrote:
" >"
" >">it would be interesting to see what changes, if any, the 2.5's cam
" >">went through in its lifetime. afaik the 4.0 had only two: a fairly
" >">radical grind used '87-'95 and a less radical split pattern '96-up.
" 
" 
" 
" I run an NOS 87 4.0L cam in my 95 engine with 91 injection. I'm quite
" pleased with it's performance. I've never heard a threat of a ping
" from it either.
" 
" markprice242ATadelphia.net

details aside all '91-5 injection is substantially identical.  if you
swapped the whole '91 and '95 systems you shouldn't see any change.

iirc there is only one difference between the '87 and stock '95 cam,
'91-5 is retarded a few degrees; renix had a knock sensor and egr
which the ho mpi lacks.  it also moves the power band up a few hundred
rpm.

dunno if the offset is in the cam or the gears.

advancing and retarding is a favorite hot rodder trick for fine tuning
a cam.
________________________________________________________________________
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen

adh@xxxxxxxxxxxxxxxxx                       and think what none thought