2CV & VISA Crankshafts
(click to see full pictures)
- Complete dismanteling, dimensional and wear checking at con
rods and main journals.
- CONRODS: Removal of old bearings and bushings. Pressing in
new special massive bronze bushings in the small ends, rivet them, followed
with fine boring to very close H6 bore diameter tolerance.
- CRANKSHAFTS WEBS & JOURNALS: Timing sprocket, thrust
bearing and gear box primary shaft bushing removal. All journals surfaces
are checked for scratching, wear, dimensions and tolerances.
- ULTRASONIC CLEANING: Of crankshaft parts, especially the
very important cleaning of the hollow bored conrods journals!
- ASSEMBLING: All parts are assembled. Primary shaft bushing
or needdle bearing pressed in. Then the most important part follows: The
run out of round correction! Typical value are in the range between "zero"
and 1,5 hundredst of a millimeter (not inches!).
- DELIVERING: The crankshaft is assembled and with a final
recheck, it is delivered including his flywheel bolts, bushing and shaft
seals. With the shafts seals you can indicate what you wish: Standard are
normal shaft seals, but you can also get the very better silicon or viton
seals at flywheel side (2CV-cranks). At fan side you can get "normal",
but also better ones: Improved with dust lip or Viton with dust lip. This
only depends on how much you want to spend!
We have indicated that a lot of options are available, from
a standard (better than new!) unit to a full racing crank that can easily
take high loads and 9000 rpm without break down or strafing.
- Stronger connecting rods.
- 2CV: Stronger crankshaft middle part. Multi layer trimetal
bearing at conrods big ends for high load (heavy duty) and high RPM abuse
(VISA is allways fitted with such bearings!).
- Checking and correction of parallelism in the two planes
for small and big ends bore of connecting rods.
- OIL FLOW improvement at thrust bearing on 2CV and VISA cranks.
On a 2CV crank also at rear bearing.
- CONRODS: Oil routing change, so the piston dome cooling is
very improved. An oil jet is necessary for this in the top of small ends.
Radially the lubrication between big ends and crank web can be improved.
ROUGH forged surfaces at the crank webs are finelly polished. Oil can better
flow away and dont clog on the roughs surfaces.
- BALANCING: It's a world for itself with great profits: An
engine that runs a lot more smoothly! Less friction lost, lower oil temps,
more power and so on: No more comments are necessary about this or we would
have to write a book about this!
A "normal 2CV crankshaft" is balanced at only 16%,
a Visa crank at even less! We can offer a more adequate 30 or 33% balancing
and, thanks to modern computer aided dynamical balancing, offer a balancing
precision with a resolution up to 0,1 gram (metric)!
For sport and racing, we currently offer the following:
Connecting rods are matched to the same translatoring, rotational and total
balance and weights. This include finest polishing of the entire rod surfaces.
That all results in that what we call: The hidden secrets of a smooth running
- WEBS: They can be profiled such an airfoil! This greatly
reduces the aerodynamical drag! But only in conjunction with an entire
new balancing. For profiling the webs and counterweights we must remove
some material and that dramatically changes the balance! Heavy metal plugs
are needed to compensate for the loss in balance of the crank!
NEVER FORGET : THE WEAR STATUS OF A CRANKSHAFT CAN ONLY BE EVALUATED
AFTER DISMANTLING AND THE CHECKING OF CONRODS JOURNALS CAN BE DONE!
What is done on our overhauled crankshaft: Better than new!
2CV and VISA:
All what is standard on the original Citroën serial
crank. But we do it better, for example with massive special bronze bushing
we fit in conrods small ends, instead the cheap rolled steel bronze backed
bushing from serial crank! Trimetal bearing in conrods big ends to allow
you continuously more than 6000 RPM. Finest polishing of all journals bearing
surfaces. Better out of round correction!
For all options see above, and please be so friendly to
send us a mail about your request wisches so we can propose you what make
for you sense and what not!
Parts and prices can be changed without prior notice.
All prices without sales tax (VAT).
To go in touch with us, please refer to our contact page!