Compression tester adapter for Twin Cam.....

[Big Dan]

My compression tester (KD Tools brand) has a 14mm and an 18mm adapter, but neither one fit my spark plug holes. It almost looks like the tester would fit with no adapter at all, but it didn't. Maybe it would if I tried harder, but I really didn't wanna booger up a plug hole, so I didn't really try too hard. I figured my best bet would be to ask here if there's a special adapter needed, and if so, where would one get such an adapter?

I really would like to do a compression test on this thing. I have one last mod to make to it (Gerolamy throttle body) and then it'll go to Valley Racing for a good tune. Depending on the CCP, I'm thinking I might like to advance the cams 4 degrees at the same time.

As always, thanks for the help.

[Jeffd]

some people knock the porcelin out if a spark plug and use a little jb weld to make an adaptor.

[Herko]

This should help. I've used this adapter on a couple different CCP testers.
http://www.compperformancegroupstores.com/store/merchant.mvc?Screen=PROD&Store_Code=PH&Product_Code=POW301052&Category_Code=

[Big Dan]

Thanks, John. Just ordered it.

[mayor]

Thanks, John. Just ordered it.

a second thanks to John    , I ordered one as well.  I even have the same kit (KD tools) as Dan.   

[Herko]

Glad to help.