Modifying cheap compression tester adapters for more accurate readings.

[@BuckYaSaws]

Great tip!

[@wcjcnc]

I tested compression on a Stihl blower that has 10mm spark plug threads. With a thread adapter on my compression tester I got 100 PSI. With a hose that has the schrader valve right there in the tip of the threads I got 160 PSI. So I had a 60 PSI difference between tests. Does that sound right?

[@srcarr52]

That sounds pretty typical.

[@Shamap37]

Do you have a link to order those valvs? I find only the one with stiffer spring

[@srcarr52]

www.ebay.com/itm/256348796802?hash=item3baf943782:g:hbwAAOSwZpRaupCV&amdata=enc%3AAQAIAAAA0FALyRCns45iHsKWV7nMt%2FuUv0HGwEVIaNl%2BHH%2BmNetyEZYbMxi%2FJmEFyGMfv4ESU5fHlkgFzsfTaCLF1eeMAyHVHQNN88i0wpYfBSzChcPisYTNFnCaeREVswFLE3xJANJObfYjj5vXJq5r2f0%2FP%2FCZ38ffXROyiyljOF2JF1W2OktrHHdv7LjDxqK4oPK7w%2FQ8w5w4Nr60mPR8OMYltL8dtGCG0wbJQG9BOLge6%2Biagdv4XDNEkNYAHLsFRwdToNRDk5kyk2VEGXt4pY42Rs4%3D%7Ctkp%3ABk9SR_iI-d6xYw

[@Srdieselshawn]

Very neat

[@Oli4vn]

Is this just a standard Schrader core being used?

[@srcarr52]

I was using a standard core for a test fit, you need special low opening pressure Schrader cores to get accurate compression measurements.

[@Oli4vn]

@@srcarr52 thanks! I'll give it a try with those, now I just hotglued in a regular valvestem but it does not give accurate readings I think

[@patrickallred850]

Are you selling them?

[@srcarr52]

No, this is why I gave all the info to make the modification.

[@patrickallred850]

@@srcarr52 Thanks Brother.. Do you have any hand pieces finished yet?

[@srcarr52]

@@patrickallred850 Sorry, not yet. I've been busy with other projects.

[@srcarr52]

@@patrickallred850 I have handpieces on my website now, luckydogmfg.com/products/angled-porting-handpiece-kit.

[@Arturas1244]

not worth doing simply buy tester with shreder valve every normal tester will have them china wont

[@srcarr52]

Most kits don't have a Schrader valve at the tip of a 10x1.0mm thread. They all have an adapter which causes inaccurate compression readings from the added volume.