whats the piston to deck height on an LSVTEC with a b18b block, b16 head, ctr pistons, and ls rods? Is it .020 or .030?

 

The deck height is determined by many things.....one of whicj is not the cylinder head........
her's how to calculate it exactly..........

first measure the block deck height

Next add these item together:
1/2 stroke
Rod center to center legnth
Piston compression height

Then subtract this number from the block deck height..........

this final number is the true piston to deck height.

 

stock is .020 less any surfacing done to the BLOCK
Do you really think anyone here has the tools to make those measurements?

 

thank you earl.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by earl &raquo;</TD></TR><TR><TD CLASS="quote">stock is .020 less any surfacing done to the BLOCK</TD></TR></TABLE>

Meaning that is the distance that the pistons sits in the hole?

So CTR pistons would effectively sit .10 out of hte hole?

 

which part is considered to be the deck?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EKhatch &raquo;</TD></TR><TR><TD CLASS="quote">

Meaning that is the distance that the pistons sits in the hole?

So CTR pistons would effectively sit .10 out of hte hole? </TD></TR></TABLE>

when you say out of the whole do u mean sitting out from the block when the crank is turned so it is fully stroked out ?

 

for the piston to be out of the whole, the flat part of the piston( not the dome) must pass the deck of the block thus making the piston to deck height a negative number. If the flat part is level with the block you have .000 PTDH...again meaning the dome(if there is one) will be above the deck. When the flat part of the piston is under the deck then it is measured in .010( deep), .020 (deeper), .030( and so on) just some info
OH...This is all at TDC., YES...uhhh..that means where the crank is turned to where the piston is at its highest point cheers

 

so what does piston to deck hieght have to do anything, why is it important, i noticed when playing with c-speed racing compression calculator it affects compression. so if i was going with a lsvtec setup in future with a b16head and b16 PR3 pistons, which deck height do i choose for the compression calculator OEM b16a/b , or OEM b18a/b/c - B20b/z ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by igotyofire &raquo;</TD></TR><TR><TD CLASS="quote">so what does piston to deck hieght have to do anything, why is it important, i noticed when playing with c-speed racing compression calculator it affects compression. so if i was going with a lsvtec setup in future with a b16head and b16 PR3 pistons, which deck height do i choose for the compression calculator OEM b16a/b , or OEM b18a/b/c - B20b/z ?</TD></TR></TABLE> exactly why I was asking the question. I guess they're all .020 by what I'm understanding.

 

The compression height of B16B PCTX (CTR) pistons is .030" higher than that of the B18B PR4 pistons. I do not know if the calculator on C-Speed Racings site is measuring in inches or not so you may need to do some conversions to get true numbers.

 

if they are OEM pistons then the C-speed calculator will compensate for the Piston to deck height. if the pistons are aftermarket, you TRULY wont know till you build it. JE is weird in calculating compression

 

i'm baffled too....cause wiseco measured the h22 pistons as .015 in the hole