Rule Question

lcreig

Member
Posts
11
Reaction
0
Do the rules (SCORE) allow in class 9 cutting of the intake manifold and re-connecting with a short length of rubber hose and clamps? I have seen this done on a couple of class
9 cars and would like to know if it is allowed.
Thanks for the imput.
 

mike_hinson

Well-Known Member
Posts
772
Reaction
2
Good question. My understanding is that the engine must be stock compression, therefore cutting the manifold would not be required. Manifolds need to be shortened on 5/1600 and 1-2/1600 engines due to flycutting for compression. I don't know how this plays out on the Class 9 manifold modification rules. I'm still building my car. I'd like to hear what the veteran 9 guys have to say.
Mike
 

MikeAdams

Well-Known Member
Posts
314
Reaction
30
I could be wrong, but with the intake cut it also allows for the removal of the manifold while leaving the altenator, stand, and fan shroud in place, if the occasion should ever arise. Can anyone confirm this? I might be mistaken......

Mike Adams
 

Protech975

Well-Known Member
Posts
790
Reaction
3
I too have seen manifolds cut on 9 cars, and spiced together with tubing. Here is a quote from the 2000 SCORE rule book on class 9. under the topic "Carburetor" "Intake manifold must be stock VW, No chemical milling of manifold or carburetors." that's it... Does this mean that manifolds can not be cut? or must they remain in the stock VW configuration? Also class 9 engines run a reduced compression ratio of 7.5 to 1 - down form a stock 9 to 1. also the Combustion chamber volume must be no smaller than 42cc. This is accomplished by adding shims to the barrels at either the case side or in the heads. This actually increases the space between the heads which is why the stock manifold always fits so lousy! Rob Stapp #975
 
Top