All of our street/performance cams are daily driver
friendly with gentle opening ramps for good idle and transition
with no lag or flat spots. Our custom designs have
progressively more top end.
STREET HIGH PERFORMANCE
NEW CAM (No Exchange
Street High Performance upgrade for all Weber cars. Our #425
10.5mm cams are similar to the factory AUTODELTA
10.5mm 1750/2000 performance profile with the
modified opening profile for good lowend torque and
idle. Midrange and top end are superb with no flat spot.
Duration 254 degrees @ .050" lift. Base circle diameter
1.030," Standard 1.075.
THERE ARE TWO SETUP COMBINATIONS: Mid-range will be about
the same with both setups.
BASIC SETUP -- A pair of these SA425 cams. as intake and
exhaust, will be strong up to 7000 RPM, with great top end for
track events and still be docile enough for street. Our street
performance 2.0 10.5:1 COMPRESSION test engine made
171 HP with very good low end torque and idle.
ULTIMATE STREET SETUPS: Enhance top end for those track
days by using SA424. as intake with this #425 as exhaust.
Sorry no dyno test results for increase.
PORTING: Cleaning up the
bowls from valve seats to back guides is quite sufficient for
street performane cams without enlarging the runners.
Full porting is marginaly appropriate for street unless you
plan to do track days. Enlarging the ports enhances gain from
midrange up and pays handsomely above 7000 rpm.
VALVES: Enlarging the window
into the chambers with our 1mm oversize valves is equally
valuable and lets cams have full affect for both street performance
HEADERS: Cam and porting do
make a big difference on their own, but these enhancements will
only reach their full potential with our Spruell
Motorsport free flow headers.
- Locktab furnished with cam.
- Bolt in with no clearance issues with any
- Our cams have super durable lobes that are first
hardwelded before precisioon regrinding.
- To minimize lobe interference with follower bores with
high lift performance cams, the base circle
is undercut to 1.030."
All new and reground cams should be installed with new
followers. There is risk of damage with old
followers. We can only guarantee satisfaction with Spruell
- Extra lock tabs $3.00 each (in addition to one furnished
- Set of followers, add $145.00.