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  1. #289
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    Nov 2005
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    XR6 Turbo
    You should really round off the egdes on the pistons, those sharp edges promote detonation
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    B20VTEC Build Thread

  2. #290
    Quote Originally Posted by ZeForce View Post
    You should really round off the egdes on the pistons, those sharp edges promote detonation

    id say this was a work in progress pic and not the final product.

    But , a good heads up for all those learning !

  3. #291
    Quote Originally Posted by ZeForce View Post
    You should really round off the egdes on the pistons, those sharp edges promote detonation
    yes, you really should (remember to take pictures after you finish rounding off the edges!)
    B20VTEC - since 2002

  4. #292
    actually , post #281 has finished pics
    B20VTEC - since 2002

  5. #293
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    Join Date
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    B20VTEC Build Thread

  6. #294
    Quote Originally Posted by tinkerbell View Post
    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
    So the P3F is the one with 8.8 compression?

  7. #295
    yeah that's right.
    B20VTEC - since 2002

  8. #296
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    Jun 2006
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    EM1
    btw, how did you know how deep to go with the dremel? and what head/grinding bit did u use with it?
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  9. #297
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    Quote Originally Posted by kraiye View Post
    btw, how did you know how deep to go with the dremel?
    A standard B20 intake valve has a head diameter of 31mm
    But the B16A/B18C intake valve is 2mm bigger at 33mm.
    So, the intake flycut radius aught to be increased by 1mm.

    I wouldn't recommend going much deeper...

    For interest sake, nothing need be done on the exhaust side as the standard exhaust valve sizes are the same for B16A/B18C/B20B @ 28mm (dia)
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  10. #298
    yeah, so you don't just make them deeper as such, you take them wider (1mm) and correspondingly deeper...
    B20VTEC - since 2002

  11. #299
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    great info thanks.

    don't suppose you know what's required for skunk2 pro1 cams in a b16with stock valves? would that require going too deep adrian?
    FOR SALE: Injector seal kits || Dayco B16A timing belt

  12. #300
    wat?

    you wann run SK2 Pro cam's with stock B20B pistons?

    i doubt that 'combination' will be any good...
    B20VTEC - since 2002

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