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Ok back now.
Sorry work get in the way of talking vw.

I do thank yall for offering the help/advice.
If we are gonna talk engine do yall wanna move it over to the engine thread?

The short answer is it is now a 94 x 86 with 53cc heads.
Leaves me with a .084 deck at 9.8 or a .098 at 9.5

fk10 likes 10:1 perhaps even more.
consider Marcs suggestion of retarding it a few degrees.
Most cams seem ground a few degrees advanced anyway.

In your case the reduced low RPM tq is a huge feature.

Everything I found on the fk10 has it liking the 9.5 to 10 range.
I do want to be on the low side.

This is my first engle cam.
I have always had the eagle cams with 107 lc.
My favorite is the 2246. It is less rampy and easy on the valve train but is still big.

A little history.....
with the 2110 at .o45 deck and 9.7 cr with 2246 cam it ran very good.
but...every tank of gas ran very different.
so I got the bright idea to drop the cr. Went to 8.0
No difference that I could tell with the butt dyno. But i could idle longer and the ignition timing would not fit. It took a lot of timing to get it to Rev high right. But took less timing to idle right. So that is why I am going programmable.
In the end every tank of gas still ran completely different. I never took the big shims out, just ran it.

I am wanting to soften up the bottom end a bit.
it is a load of grins to ride but the eagle cam comes on hard low and quick. I guess dynamic cr comes up real quick.

so I got the fk10. 108 lc and around a 1000 rpm later from what I have read.
at a bare minimum I am gonna make sure it is not advanced.

So ya thinking maybe 2 retarded?
Whatcha think of the .080 to .090 deck?
dig out the chambers or dish the pistons and get the deck down?

O yeah... gearing
Normal 1 and 2
1.26 third
.082 fourth
3.44 ring and pinion.

It actually takes longer to shift it than the amount of time pulling the gear.

I'm firmly in the tight deck camp, but a "semi-hemi" turbo-style chamber could still work well if you left `a ~1/2" squish ring around the perimeter @.040ish for squish.
WBX heads work great like that anyway, are about as knock resistant as it gets, your setup could be similar just upside down.
(WBX pistons have a huge dish, a Heron head w ~no chamber, even mentioned as an example on Wikipedia, even though it has a tiny chamber due to the angled valves)

Marc will usually recommend .050 as a minimum safe deck, likely a good plan on a high RPM stroker.
I ran ~.024 for ~150K miles, but it was on a near stock t4 with 90mm pistons, 5600 RPM redline enforced by the cam.
I would not willingly go >.055" deck, makes for a knock prone motor.
(if you only run @5-7K at WOT 1/4 mile at a time it likely doesn't matter much, but in normal driving, it does)

I did not experience knock when I went from a .045 deck to a .140 deck. It was a long time ago. Before I ever even heard of the hemi cut. But i want to say it worked something similar because it took a lot of timing.
I am an old Mopar guy. I am not against a hemi. But it takes the correct pistons to go with it.
Pretty much everything I have run on the street has been a flat top wedge. It would be nice if the dub head was wedgier.

So yes I want some squish area.
even though I could possibly get away with a large deck using programmable ignition.

So some squish even if it is small is what you recommend also.

Looks like I am gonna be digging out the chambers.

Just as a side note.
I ran a set of modded up 041 heads (40 x 35.5) from Claude buggies from the early mid 80's until the late 90's.
Then I got a set of 050's from Roy.
A little touch up on the ports and they ran much better.
The different cooling fin arrangement made a big difference in my application

Hi everyone I'm Lani from Los Angeles.... new owner of a Jetta 2014. Sacrificed so many trips just to have her

Hope to learn so many things here

Welcome to the STF, Lani... but this is primarily an aircooled (old school VW Bug) forum.
You are far more than welcome to hang out, but we may not be much help with your Jetta.

Mind, many of us have newer VWs as well, but late model VWs are not (typically) discussed here.
(I have a mk4 TDi and an 86 Cabby(MK1))


Can anyone recommend a good late model watercooled VW forum?
(not vwvortex, one with mostly adult humans like tdiclub , although vortex has a lot of great folks, the signal/noise ratio is brutal)