Only for comparison

You don`t need a flow bench to see the difference!


Orig. Dellorto Venturi     vs           JPS Venturi

JPS Dellorto DRLA Venturi Shipset

A Set of JPS Dellorto DRLA Venturi in Ø34mm ready to ship

Thank you Thomas!

Have Fun and all the Best for your nice Streetscreamer Project

JPS Valvecover

JPS Valvecover with better lubrication and cooling  for the valvetrain and cylinderhead

This reduces wear on the rocker arm and ensures uniform cooling and lubrication on both sides of the cylinder heads

JPS Venturis for Dellorto DRLA

I was unhappy with the shape and quality of the Dellorto DRLA Venturis

 so I began to produce my own Venturis

 

                                                        These are available in sizes:
                                                                         32mm
                                                                         34mm
                                                                         36mm

                                                     Price / Each    SFr 21.- / € 17.-

           These venturis are made ​​from high quality aluminum and fits perfectly


                                                    Manufactured in Swiss Quality

Änderungen rückgängig machen

Alpha

JPS Utimate Racing Pushrods ready to ship

  A nice Set of JPS Ultimate Racing Pushrods
!max. Valvespring pressure 280kg!

 ! now its finished with the annoying rattle from the valvetrain!

Made to custom lenght and assembled ready to use

JPS Ultimate Racing Aluminium Pushrods

This is how the JPS Ultimate Racing Pushrods look like before installation of the Manton Tips

The Pushrods are tappered on both sites
Deephole drilled from one site!

There is no gap or edge in the middle

The JPS Ultimate Racing Pushrods are made of a special aluminium material.
This material is used in engine areas on aircraft where the temperature often encountered up to 250°F (120°C)

This material does not lose strength when the temperature rise up to 250°F (120°C)

 7075 T6 Aluminium will lose 3 times more in strengh when its getting 300°F (150°C)
And the pushrods get in contact with the oil that go up to the heads and with the hot oil coming back from the heads!


 JPS Ulimate Racing Pushrods are only available cut to your lenght.
 I will do the installation of the tips (special proceed and tools are required)
So you only must give me the lenght you need!

This pushrods can handle up to 280kg spring pressure (but no serious engineer need that much)

 

 

It was not easy to do this photo

But you can see, perfect clean hole no gap or edge

 

 

 

Line up

Camshaft Gear Modification

For my HP street-engines I modify the camshaft gear as you can see below

I cut two approx. 2,5mm width an deep to the ground grooves in the cam gear.
This is to reduce the surface that is in contact and the oil can squish out easier.

Or you can put some marking ink on the cam gear and find out how much surface you need.

You can reduce it by nearly 40%

For HP street engines there is no reason to run straigthcut cam gears

To you need some examples?

This is the camdrive on the Porsche 910 race engine

This on a Carrera 6 engine

and this on a 3.0l RSR engine

All this engines turn up to more than 8000 rpm, producing more than 110 hp/l

The camshaft gear on this engines must drive the huge oilpump, 2 duplex chains for the camshaft that serve 12 valves with double valvesprings.

So I think this are good arguments to throw the noisy straight cut gear in the trash ;-)

Black Magic ready to run

Nice Layout

Typ IV Head rework

Heads for 412 LE machining

 

 

assembled

 

 

 

Head to Head

Meeting of the Superheads?

3 Nations

3 Concepts

Remmele Motorsport

RS-Motor

JPM Motorsport

Do you need a Br(e)ake

This delicious brake for the front axle is for sale!

It comes with new Pagid RS14 brake pads
and mounting screws and orig. brake pads

Disc dimension is 330x34mm
Monobloc calipers 996.351.430

No heat cracks or damage, like new


Make an offer!

 

 

Pure Racing II

                                                     Big Boys Toys ready for racing!

 

 

RSR Style Slidevalve for Flat 6

 

 

 

Can you hear the engine scream?

 

 

 

JPS World of Flywheels

               A new set of JPS Lightweigth Flywheels is manufactured

              Price for a JPS Flywheel : jpsaircooled@gmail.com
             
              Most customers want them unbalanced, they to balancing with crankshaft an pressure plate together   

                 If you want the Flywheel balanced it can be arranged                                  

 

 

                                                            World of JPS Flywheels
                                                       

 

 

JPS HD Aluminium Pushrods / Prices

 JSP HD Aluminium Pushrods ready for Installation

All Set are custom made for thr perfect fit, to your application!

This set is custom made to a total length of 270mm

 Set of :
8 pcs. HD Aluminium Pushrods  Ø10mm / Ø6mm  (265mm length)


This are precisions tubes (Made in Germany), not drilled from both sites!!

Weight as you see above, 45Gramms with Tips (from Manton Pushrod)

8 pcs. HD Aluminium Pushrods cut to custom length
16 pcs. High Quality Tips from Manton installed
max. length is approx. 284mm



You can handle a valve spring pressure up to 200kg easy!
Race proven and tested over Years .

Pure Racing

                                                The JPS Slidevalve in on the engine

 

The engine is from "Wallä" Zwahlen`s racing car

 He is racing since 30 years!!!

Most on round track and hillclimbing

 

 

 

Perfect Intake Manifold Ø 49mm with Injector hole

 

 

 

Fits perfect! 

 In connection with Kugelfischer mech. Injection

 

We look forward for the Dyno results

 

 

 

 

Lubrication improvement

This improves oil flow to the lifter bores in the right case half

It helps to reduce wear on the tappet holes
Better lubrication of the rockers and reduced cylinder head temperature too

 

This and a lot of other crankcase, cylinder head  modifications are availaible at:

                               Zündpunkt GmbH

                                            Flüelistrasse 10 | CH-6064 Kerns
                                            Telefonnummer +41 41 661 00 62

                                                      bieri@zuendpunkt.ch

 

Scope of work:

 

Crankcase modification for big bore cylinders

Crankcase decking

Crankcase line boring ( first, second, thirth main bearing mass)

Crankcase maching for crankshaft up to 84mm

 

Cylinder head opening for big bore cylinder

Setting for correct compression rotaion

and a lot of more......

 

 

Friday Quiz II

                    How knows in wich aircooled engine this connection rod was used:

                                               Weight incl. bolt is: 418Gramms

 

 

Answer:

 

This Connection rod was used in the Porsche 935 Twin Turbo

 

 

This is the engine

 

First used in

935 (1976) with 433 kW (590 PS) bei 7900rpm

935/77 (1977) with 463 kW (630 PS) bei 8000rpm

 

Last evo:

 

935/78 „Moby Dick“ (1978) 620 kW (845 PS) bei 8200rpm

Aircooled Cylinders and watercooled 4 valve head