Cam Swap

[Kurek, Larry]

I'll agree.

Also, the wider lobe angle will take a LOT of the lumpiness of a bigger cam
away. You definitely have a better breathing cam...but are your heads,
intake, and exhaust up to it? Remember....the motor will only flow up to its
point of greatest restriction. If it is the exhaust....then you will see no
change :(

TTYL!

Larry

> 
> 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.