CSP Velocity Stacks - Weber 36IDF - Short (22mm High)

Improve the performance of your engine at higher RPM`s with these 22mm high Weber 36 IDF carburettor Velocity Stack`s.

Sold in Pairs.  One pair required per Weber 36 IDF Carburettor.

Specifically designed for Weber IDF dual carbs and developed with the help of the latest software – the CSP Products velocity stacks set new standards thanks to their features!

Here are the features at a glance:

• developed with the support of a CFD software and a flow bench
• CNC turned from high-strength aluminium, which makes it particularly thin, yet sturdy
• individual versions for 36, 40 and 44/48 Weber IDF carburettors
• each diameter is available in three different heights (22, 52 and 84 mm)
• also suitable for Dellorto DRLA carbs
• black hard anodized
• laser engraved, easy to read
• off-centre notch on the inlet for easy dismantling of the emulsion tube (not on the long version)
• perfectly matching CSP Products’ air filter housings
• also fit various air filter housings available in our shop
• come in pairs

Made in Germany!

How do CSP Products velocity stacks affect performance?

Velocity stacks are not just used for looks, as one might assume. No, they mainly are used to influence the length of the intake plenum. It extends not only between the valve seat and the carburettor, but also up to the edge of the velocity stack. Consequently, shape and length of the CSP Products velocity stacks have a positive effect on the flow rate and the engine characteristics – especially hidden under air filters!

In addition, the length must match the timing of the camshaft used. In principle, a long velocity stack ensures higher torque at a lower nominal speed, while a short stack is ideal for high-revving engines and ensures better performance at higher rpm. For example, a Bus engine that is designed for torque with an appropriate camshaft should have tall CSP Products velocity stacks. In this case, they measurably increase the torque.

One thing applies to all three versions: Whatever losses arise at the beginning of the intake plenum cannot be made up for later, even with the best ported and polished heads.

What makes CSP Products velocity stacks so unique?

In contrast to other velocity stacks, the optimized contour and inlet geometry of the CSP Products models, which consists of various radii and cones, have been specifically developed for use on Weber IDF dual carbs. The inner geometry of the IDF carburettors was precisely taken into account – of course also in conjunction with our CSP Products air filter housings. This provides a measurable advantage over universal stacks.

In addition, they have unique features, which you will not find elsewhere in this combination. These include, for example, off-centre notches in the inlet of the short and medium-tall stacks. They ensure that you can unscrew the emulsion tubes without any problems even with the stacks installed. This saves time and trouble when jetting the carbs. Of course, the notch – which is not necessary in the tall version – has no measurable influence on the flow.

The same applies to the flow of the tall CSP Products velocity stacks when combined with the 100 mm CSP Products air filter housings. The space available between the inlet and the filter cover is precisely calculated and leaves enough space for perfect air flow. That’s proper engineering!

This is also proven by details such as the laser-engraved usage labels on the inlet of each stack, which is CNC-machined from billet aluminium. Or the collar on the flange of the 36 mm velocity stacks, which eliminates the notch in the 40 mm CSP Products air filter base plates and thus ensures a perfect flow. In addition, they are of course hard-anodized for best protection, and are available in different versions for 36, 40 and 44/48 mm throttle diameter.