# How much boost for 500whp?

**URL:** <https://forums.speedlife.net/t/how-much-boost-for-500whp/193436>\
**Category:** PittSpeed Automotive\
**Created:** [November 2, 2007, 6:02pm UTC](https://forums.speedlife.net/t/how-much-boost-for-500whp/193436 "2007-11-02T18:02:12Z")\
**Posts on this page:** 1\
**Showing post:** 64

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**Author:** ![fmfkid250](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fmfkid250/32/5973_2.png) [@fmfkid250](https://forums.speedlife.net/u/fmfkid250)\
**Post date:** [November 8, 2007, 1:23pm UTC](https://forums.speedlife.net/t/how-much-boost-for-500whp/193436/64 "2007-11-08T13:23:25Z")

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> [@RidinDirtyCrx's Build Thread (Now Running)](https://forums.speedlife.net/t/ridindirtycrxs-build-thread-now-running/26260/64):
>
> what’s the difference between the b18b and b18c blocks?

6 bolt main (b18c) vs 2 bolt main(b18a/b)

Oil squirters (b18c)

You dont need an external oil line to the head for vtec with a b18c bottem end.

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