Acceptable Valve Spring Gap Before Coil Bind

[jims205s16 1]

Hello everyone.

I'm in the process of rebuilding a spare head up for my 1.6 GTI.

I have a Catcam 4900342 I intend to fit which is recommended with double valve springs.

Before I go to the expenses of machining the head for these I thought I'd have a measure up with standard springs.

I have 1.8mm left in the spring at full lift before coil bind which I think is enough but I would like confirmation of this and what is a minimum acceptable.

Thanks Jamie.

[petert 588]

Needs to have 0.007" minimum between each coil.

[jims205s16 1]

Thank you for quick response. That sounds like I have enough in the spring then which could be a good saving right there.

Would you know what rpm standard springs ect can cope with. I'm Looking to go to approx 7500.

[petert 588]

You won't have any trouble revving past 7500 with those springs, provided the rest of package matches.

[jims205s16 1]

That's good news then. Thanks for confirming.