heads for 1951ccm engine..

[Tom G.]

Hi There,
So in past i have often talk about my engine 2 litre type 1 with std. heads (35,5x32) with my german cam 324°,@0.50 276°, 9,7mm (0,380")cam lift, Udo becker lifter, std. rockers..now 48 IDA with 37 vents...

My question i want to go as high as much with heads..the engine block shouldn´t be split. Only the heads, rockers, compression ratio could be changed...

So which max. valve sized i could go for?
- 40x35,5
- 42x37
- 44x37

which port design are allowed? CE heads (nice B-form chambers); SE;oval; Wedge,D-port??

Daily driving is not more my first whish, but it should be driveable for sometimes cruising!!
But first of all is HP for 1/4 mile....

Thanks and best regards
Tom
 

[Bewitched666]

44x37 with 10.1 cr and wedgeports

[Tom G.]

44x37 with 10.1 cr and wedgeports

You drive it on an 1951ccm engine?

Bye
Tom

[Bewitched666]

Nope but you asked how high on the heads and street driving is of less concern,otherwise same cr but 42x37 valves will work great too.But for more hp and flow go for the 44x37 valves with that cam and can even run 11.0 cr

[dirk zeyen]

hello tom,

if you run a stock ratio gearbox don't go to big in valvesize!!!
close ratio with 44/37.5 or stock ratio with 40/35.5.

dirk zeyen

[besserwisser]

Whats that orange shit between the case halves?

[dirk zeyen]

another idea

if i'm right you run a wbx-crank with 90.5 cylinders?!?
get a set of 94 slip in cylinders, so you don't have to open the case and use 42/37.5 valves with a stock ratio gearbox.

dirk zeyen

[Tom G.]

Whats that orange shit between the case halves?

a little bit too much of gasket fluid... ::)But the engine is dry since 9000km...

Tom

[Tom G.]

another idea

if i'm right you run a wbx-crank with 90.5 cylinders?!?
get a set of 94 slip in cylinders, so you don't have to open the case and use 42/37.5 valves with a stock ratio gearbox.

dirk zeyen

i am run a CB 76mm crank......

Tom