Tom M'Guinn

I measured mine at 33cc. I have no idea what head Andial had in mind when they decided to market these as 8:1 pistons, but with an '89 2.7 head they come out over 8:5:1.

Thom

Thanks Tom. Did you also measure the depth of the bowl?
I would like to know how much valve lift is tolerable.

Urs

Hi Thomas,
you know my Pistonstyle from the other board ..... there is 32,5 - 32,8 cm³
Head : 65,0 -65,2 cm³

but i think ya wanna know the high from the ground of the bowl till piston top right??

greetz urs

Thom

Hi Urs,

Thanks for the info. I'm not sure your pistons are the same as mine, but yes I would like to know the depth of the bowl for mine.

PS : check your e-mail

Tom M'Guinn

I have a set of 104.5 Mahle/Andials on the shelf. What measurements would you like?

Thom

I would like to know the depth of the piston bowl to get an idea of how much I can increase valve lift in the case I try a different cam.

Tom M'Guinn

Thom, I will pull a piston out and measure this week. Meant to yesterday but ran out of time.

In the meantime, I have a question for you 3L folks. I've noticed that my timing belt runs very far forward on my cam gear -- actually hanging off the front of the gear by half a mm or so. I have my theories but curious if anyone is seeing this on their 3 liter motor -- particularly those with 89 8v heads...?

Thom

Tom, the timing belt on mine does not align quite perfectly with the middle of the cam gear, but it definitely does not hang off the way you describe.

Thom

Bump...

Paulyy

Delete post

Tom M'Guinn

Sorry Thom, completely forgot. Will check and report back.

Tom M'Guinn

It's about 6mm from the flat top of the piston to the bottom of the bowl (Mahle/Andial 104.5). I measured with a stright edge and the depth gauge on cheap calipers, so if you need something more precise just let me know.

Thom

Thanks Tom!

refresh951

Tom,

Can you add me to the list as my car is now running?

Refresh951, 2.85L Blown944 custom stroker, JE, Eagle, sleeved & filled, TO4E DBB 50 Trim, #8 Hotside, Rogue Tune

Tom M'Guinn

Done! And congrats!