CCassidy

I'm looking into using an ST170 engine, basically, cause it's got better headwork, conrods etc

Now all the variable stuff will be binned, and I'll be using my WeberAlpha throttle bodies & management.

Now, I want to know if normal S3 zetec cams will physically bolt into the bare ST170 head, as I can't use my current S1 Zetec cams in it, and would also like to go to something a little bigger than what I'm currently using.

inis

have to get a reg zetec head. Your exhaust cam wont bolt in either? I know the intake wont, but I'm curious if the exhaust will...

CCassidy

Cheers for the reply mate

Do you know exactly why the inlet cam won't fit?

Wardy257

Why are you binning the VCT? Never heard anything good about webber alpha either.

AustenW

inlet cam has a larger journal size

Dont touch webber alpha either

pdfbt40

Not only does the inlet cam have one larger journal size (the first one), but it is also slightly displaced longitudinally. The exhaust cam has the same journals, but..........

Both cam profiles are matched to the different valve stem length and solid cam followers, so the base radius is also different to standard Series 3 (Blacktop) cams.

Don't know what the spec is but Piper do reprofiled ST170 cams. Also Ian Howell has developed specification for ported ST170 head, valves and cams.

Martin