On a head
that has been decked, "degreeing" the cam allows you to get the cam
dialed in precisely for where you want peak power. Factory settings are
for optimal balance of efficiency-power-reliability, so there is
opportunity on a performance build to gain additional power and to fine
tune where that power comes in.
In general, advancing the cam timing will result in higher low-RPM
torque, but will adversely affect high-RPM HP. Retarding the cam does
the opposite: lowers low-RPM torque, but increases high-RPM HP.
For street applications, you might wish to advance your cam timing for
peppier off-the-line response. For track applications, you might also
want to be able to adjust timing (if rules allow) to put the power band
where you want it depending on the venue. More advance is better for
tighter lower speed tracks where torque is more important than high-end
HP; retarding the timing is better for bigger tracks with long
straights where top-end HP is paramount.
924/931 standard motor responds well to +10 degrees of cam timing. The
OEM cam sprocket has 44 teeth, meaning that setting the timing belt
"off" by one tooth can offer a way to advance or retard cam timing by
8.2 degrees. With a +/- 3 degree gear, you have the ability to set the
cam timing as follows:
gear at -3, belt 1 tooth retarded
gear at 0, belt 1 tooth retarded
gear at -3, belt 1 tooth advanced
gear at -3, belt at TDC
gear and belt at TDC
gear at +3, belt at TDC
gear at +3, belt 1 tooth retarded
gear at 0, belt 1 tooth advanced
gear at +3, belt 1 tooth advanced
hard anodized aluminum
-3°, 0°, +3°
Adjustable Cam Gear Suitable
for all 924/931.
Adjustable Cam Gear
Front of gear
Rear of gear
Cams Available Now! In
2015, we visited Edelweiss Motorsport in Essen, Germany. Edelweiss has
been developing camshafts for Porsche for many years, and has recently
focused on the 924 2.0L platform. They have developed a "hot street"
camshaft that is a bolt-in +20BHP modification, using standard lifters.
Edelweiss has agreed to allow Ideola's
Garage to be their exclusive
reseller of 924
profiles in the US.
"Hot Street" Cam Allow
weeks for processing, not including shipment times. Requires customer-provided OEM
Contact us if you need help locating a camshaft core. Shipping
instructions will be provided upon receipt of order.
Edelwiess "hot street" profile for single throttle body applications
Valve Kit by European Motorworks Exclusively
from Ideola's Garage! We can now source the complete valve train
package offered by European Motorworks in their fabled "Big Valve"
head. The package includes the following components:
4: 44mm intake valves, 8mm stems
4: 37mm exhaust valves, 8mm stems
4: 44mm intake valve seats
4: 37mm exhaust valve seats
4: spring seats for exhaust valve springs
8: valve guides
valve stem seals
CNC'd chromoly retainers
1: set of heat-treated valve keepers
1: complete set of heavy duty dual valve springs for Porsche 924
(1.550" of lift 170 pounds of seat pressure)
you don't need the entire package, we can also order individual
components. Please contact
all 1977-1984 2.0L 924/931. Allow 1-2 weeks sourcing and packaging of
the kit components.
a more economical alternative, you may wish to reuse your stock valve
spring set. Suitable only for stock or Stage1 cams. High lift cams
require the heavy duty springs included above.
recommend that the valves be
ordered uncut, and a little longer than stock so that your machinist
can match them specifically to your cam and lifter setup. If desired,
the valves may be ordered in OEM-spec lengths:
= 137.2mm intake, 136.95mm exhaust
= 133.2mm intake, 133.35mm exhaust
Parner Solid Lifters Exclusively
from Ideola's Garage! We are the sole US distributor of the Sten Parner
solid lifters for the 2.0L platform. These lifters are a solid design,
eliminating the adjusting grub screw and the hole in the OEM design,
which is a leading cause of lifter failure in high-revving situations.
Parner Solid Lifters
addition, the Parner lifters weigh only ~65 grams with lash cap. In
comparison, each OEM lifter + adjusting screw weighs ~93 grams. By
switching to these solid lifters, you can remove ~224 grams of weight
from the valve train! This translates to a faster revving motor and
ultimately more power. The solid design should also allow highly
prepped motors to safely rev past the 6500 RPM limit of the OEM design.
Parner Solid Lifter Set Suitable
all 1977-1984 2.0L 924/931.
8mm Lash Caps
lifters require the use of lash caps, which must be precision ground to
set the proper valve stem clearance. These 8mm lash caps from Manley
for use with the 8mm stems of the Big
Valve Kit. We recommend ordering
two sets, one for setting initial
lash, and one to use later for fine tuning the lash after engine
break-in. If you require lash caps
for the OEM 9mm valve stems, please inquire
to special order.
8mm lash caps
Weber Carb Conversions For
our 924 Normally
Aspriated enthusiasts, we can now offer the fabled
Weber DCOE carb conversion
kit. The standard K294 kit from Redline
Weber includes dual 40 DCOE sidedraft carbs. However,
we have worked
with Redline Weber directly to put together an even better package
using dual 45 DCOEs for improved top range performance. Our kit
includes the necessarly low speed idle tuning jets and
properly sized venturis to properly setup the 45 DCOE configuration for
street driving, while still delivering the superior top-end performance
of the larger carbs.
calibrated synchronizing instrument is a no-restriction, full-flow
carburetor balancing tool that is essential for dialing in the fine
adjustemtns on any dual carb DCOE setup.
Fuel Pump This
fuel pump is the standard, high volume pump recommended for the DCOE40
and DCOE45 setups. Operates at 3-4psi, providing 34 GPH, up to 200BHP.
Fuel Pressure Regulator This
adjustable fuel pressure regulator is recommended for use with the
DCOE40 and DCOE45 setups. Adjustable from 1.5psi to 8.5psi. Suitable
for use with Webers and Dellortos at 3.5psi, and Solex/Kadrons at 2psi,
with a variety of input pressures. Comes with mounting bracket and
hardware, and has built in 7mm barbs for the fuel hose inlet and
outlet. Locknut and adjusting screw, and full instructions.
Fuel Pressure Regulator
the entire line of Redline Weber carbs
and accessories. If you need replacement parts, new gaskets, additional
jets, or other accessories, please inquire
with your needs!
DCOE Dual Sidedraft Kit Includes
the 924 intake manifold adapter, dual 45 DCOE sidedraft carbs,
manifold gasket kit, 924 throttle linkage kit, and a special
calibration kit with instructions. Standard
Weber K294 Kit Includes
the 924 intake manifold adapter, dual 40 DCOE sidedraft
carbs, soft-mount intake manifold gasket kit, 924 throttle
linkage kit, and a
special calibration kit with instructions. Manifold
Adapter Only The
manifold adapter is ideal for
to convert to Independent Throttle Body (ITB) setups. 924
Throttle Linkage Kit Includes
all of the necessary adapters and brackets to connect your stock 924
throttle cable to a dual 40/45DCOE setup (Note: this kit is included
with the full carb setups above). Soft
Mount Kit This
kit includes four manifold-to-carb spacers,
eight rubber o-rings, and the special Redline vibration damping
hardware necessary for optimum performance of your Weber carb setup. (Note:
this kit is included
with the full carb setups above).
Calibration Kit A
complete set of jets in various sizes for fine tuning and calibrating
your dual 40/45DCOE setup. Includes (4) each, low speed idle
jets: (F8-55, 60, 65, 70); and (2) each, bypass jets
(000) in a plastic box. (Note:
this kit is included
with the full carb setups above).
Velocity Stack Screens Two
pair of Redline domed velocity stack screens for "keeping the big stuff
Velocity Stack Screens
Filter Assemblies Two
pair of Redline shortie filter assemblies, short enough to clear the
924 brake booster.
adapters for splitting fuel feed between the two carbs, and to provide
a return feed using the OEM return line to the fuel tank on the 924.
Price per each.
can now source a variety of piston configurations through Diamond
Racing, including US-spec and Euro-spec configurations for normally
aspirated applications, and US-spec 931 applications. Options include:
bores of 86.5mm, 86.75mm, 87mm, or custom bores up to the block's
maximum (approx. 88mm)
height for strokers
coatings (ceramic tops, teflon skirts)
pistons are forged from 2618 or 4032 aluminum and CNC machined. All
piston sets include wrist pins, retainers and rings. The inclusion of
rings in the price makes these an attractive option, as oversize
ring sets for OEM pistons are nearly half the cost of a completely new
set of Diamond pistons!
If you want custom pistons based on OEM design, you can select from the
options presented in the column to the right. If your order requires
custom parameters, such as offset pin height or non-stock valve
pockets, please contact
us for assistance in placing
all 1977-1984 2.0L 924/931. Price per set, including wrist pins,
spirolox retainer, and complete ring set. NOTE:
these are custom manufactured parts.
Please allow 6-8 weeks for manufacturing and delivery.