The B20VTEC discussion thread

[Lerlo]

Quick question. What would be the compression of a stock b20 block with a b16a head, will the compression remain as 9.8?

[ZeForce]

Quick question. What would be the compression of a stock b20 block with a b16a head, will the compression remain as 9.8?

9.96:1 with PR3 B16a/B18cR head
10.14:1 with P72 B18c head


This is using a B20B8 with the PHK pistons.....

[Lerlo]

9.96:1 with PR3 B16a/B18cR head
10.14:1 with P72 B18c head


This is using a B20B8 with the PHK pistons.....

Cool, thanks!
Whats PHK pistons? Sorry, kinda noob.....

[ZeForce]

Cool, thanks!
Whats PHK pistons? Sorry, kinda noob.....

They are the pistons used in the B20B8 which will give you higher comp compared to the pistons used in the B20B3

[tinkerbell]

i.e they are the name of the standard Honda B20B8 pistons.

the B20B3 Honda pistons are stamped "P3F"

see the stamp here:

[IMG][/IMG]

[MikeyG]

tinker it says PH? but if it doees say P3F where.. i think im going blind

[ZeForce]

Here's a slightly better picture

[kraiye]

he's showing u the PHK pistons from the b8, not the P3F from the b3. i was a lil confused at first too. lol

[DC2-PWR]

Mmm intresting, thanks for the pic

[Lerlo]

Wow, thanks for the pictures!

[tinkerbell]

tinker it says PH? but if it doees say P3F where.. i think im going blind

lol!!! my bad!

i didnt really set that post out too well eh?

at least krayie understood my sunday morning posting

FWIW here is a P3F stamped piston what was fly-cut by a head shop:



here is a PHK that was hand cut with a Dremel by me:

[tinkerbell]

oh, and see how the P3F is has a pronounced dish and the PHK is more flat?

that is the difference between the B20B3 and the B20B8