2.0L Build Suggestions

[BURN-BROS]

If you run the Mahle 906 pistons with the 67S heads you will be around 9.7/1 provided that the heads are not decked and it didn't have too many valve jobs. That is without head gaskets...If you ran current gaskets you will be about 9.3/1 approx..

[preS]

If you run the Mahle 906 pistons with the 67S heads you will be around 9.7/1 provided that the heads are not decked and it didn't have too many valve jobs. That is without head gaskets...If you ran current gaskets you will be about 9.3/1 approx..

Great info. Much lower (and safer?) than what I would have expected.
Thanks

Btw what would be the data using 67S pistons and since we are at it same question w stock 130hp pistons and heads? I understand there is dome difference, valve pocket and valve size that differs.

Richard

[BURN-BROS]

What head do you want it calculated from Richard?...NVM, glossed over the 130hp heads..

1967 S piston with a small valve head and No head gasket you are at 9.2/1

with a gasket you are at 8.9/1 approx.

This is assuming the dome volume is correct for the 67S piston.


In the end, If you want to go to 2.2, then I would advise switching to 2.2 heads. It's a better head in every way.

[rower]

The new Mahle S P's and C's are actually 906's , so you will be milling the piston tops or twin plugging . If you don't appreciate the 2.0 why not get a newer car instead of ruining a 2.0 ?

Hey Richy.... I’ll be interested in getting your input further when we undertake my 2.0 rebuild that I believe you are helping me with.

Maybe I’ll see you next Friday?

[Richy]

Aaron has not worked with the newest generation of Mahle P's and C's . C. R. will be in the 10's .

[blue72s]

1967 S piston with a small valve head and No head gasket you are at 9.2/1

The 67/68S piston was officially spec'd at 9.8 :1
and the 69S piston (looks like 906 piston) at 9.9:1

[Richy]

For awhile and maybe now when you ordered a Mahle '67 S piston and cylinder set you received a 906 set , and the 906's are not 9.8 : 1 , so it really doesn't matter what the specs are . And the air deflectors don't really fit around the bigger 906 cooling fins ; well they do with modification .

[66S]

The advertised compression ratios are nominal, the measured numbers are different.

[blue72s]

The advertised compression ratios are nominal, the measured numbers are different.

Oh, I see. Thanks

[BURN-BROS]

Aaron has not worked with the newest generation of Mahle P's and C's . C. R. will be in the 10's .

Dome volume is listed at 38.8CC, how does one attain 10/1 with a 73cc small valve head?

With the 67 S valves heads get close, but you will loose it once you install head gaskets... 9.3/1 will be the approximate comp.