GTI6 valve springs - installed height and rate

[NNN 1]

Hi everybody, a really long time since I've here... about the same as my car has been sitting there all alone...

 

I am slowly starting to put things together again for my engine. I was wondering if anyone would know the installed height of the gti6 springs. I did some measurements today but I'd like to check them with the community.

I'm getting a 10.8~11 lb/mm combined rate out of some tired dual valve springs from a ~120k km vts; 90lbs@33.6mm seated pressure and about  200lbs at 10 mm lift. I measured 2 pairs of springs using 2 methods, although one should be more precise than the other, the one in the picture with the small load cell should be more that accurate enough.

I also got a very doubtful 33.6mm installed height - need to turn a cylinder to fit between the dummy spring and the tappet bore to measure it more accurately.

 

Can anyone confirm or refute this?

 

I probably need to say that I used a modified xu7jp4 retainer, that aside from any minor machining differences, measures about the same as the gti6 one.

 

If anyone cares this is the spredsheet and some photos

 

Thanks,

Nico

 

 

 

vsprings.xlsx

[petert 586]

I can't recall the installed height but if you've got 90lbs on the seat, that's perfect.

[NNN 1]

On 8/1/2018 at 2:25 AM, petert said:

I can't recall the installed height but if you've got 90lbs on the seat, that's perfect.

Thanks! Peter, are you still using those Kawa springs in the mi16 head? 

[petert 586]

No, I'm now using Supertech K20 springs.