20v BT Head
02-24-2025, 05:55 PM
Post: #1
20v BT Head
hi all,
I'm searching a hard to find value :
Engine 4age 20v Blacktop: what is the head cylinder volume( for 1 cylinder)????
Impossible to get an answer ....
mine is 29cc , but I suppose it has been milled ?
I'm rebuilding the engine and got Toda forged pistons .
Trying to find the correct head gasket thickness, as the Toda pistons will increase the
CR.
Toda says I can use a 0.8mm thickness , but with a stock head cylinder...
Hard to find a reliable answer .
Thanks for helping
Phil

Filh
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02-24-2025, 10:55 PM
Post: #2
20v BT Head
According to SQ Engineering, they measured it to be 37.8cc:
https://www.sq-engineering.com/tech-arti...1ed7090bfa

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Yesterday, 03:09 PM
Post: #3
20v BT Head
Thanks Banpei.
I read the article , but didn't notice the Blacktop CH .
Saw it now .Pffff Beeing old is awfulDodgy
Thanks again

Filh
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Yesterday, 11:16 PM
Post: #4
20v BT Head
No worries, I'm already at the age where I can't do without reading glasses... Big Grin

1983 - AE86 Sprinter Trueno - import project
2013 - Honda Civic sport - daily driver
2004 - AEU86 dot ORG - daily domain

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