Cam Swap

[David A. Cooley]

At 12:19 PM 6/30/99 -0700, you wrote:
>I just swapped the cam out in my 94 Sonoma with a TBI 4.3 the
>results were very unspectacular, nearly imperceptible.  I went from a
>cam with a 110 degree centerline, 179 intake / 194 exhaust degrees
>duration @.050 and .349 intake and .384 exhaust lift to 112 degree
>centerline, 207 intake / 207 exhaust degrees duration @.050 and .442
>intake and .442 exhaust lift.  A K&N filter is the only other
>powertrain mod.  Do I need to do a VCM retune to realise benefits from
>this cam swap or are further hardware modifications in order.  I am
>also thinking about using a degree wheel to make sure the cam grinder
>phased the cam properly although since it is a regrind it would be
>nearly impossible to get the timing too far out.

if the exhaust is still stock, that could be the "cork" holding the genie
in.  I put a set of Edelbrock TES headers on a 93 GMC Jimmy with the 4.3
and added a 3" cat back exhaust with Walker Ultra-Flow muffler... Just
that, a 180 thermostat and a K&N dropped it to 14.7's in the 1/4 mile.  The
added duration/lift of the cam won't be realized untill you open up any
restrictions (Exhaust) then you may need to retune the chip to deliver more
fuel for the added breathing.
===========================================================
           David Cooley N5XMT           Internet: N5XMT at bellsouth.net
     Packet: N5XMT at KQ4LO.#INT.NC.USA.NA   T.A.P.R. Member #7068
   Sponges grow in the ocean... Wonder how deep it would be if they didn't?!
===========================================================