# ls/vtec build question?

**URL:** <https://forums.speedlife.net/t/ls-vtec-build-question/194606>\
**Category:** PittSpeed Automotive\
**Created:** [January 7, 2008, 10:40am UTC](https://forums.speedlife.net/t/ls-vtec-build-question/194606 "2008-01-07T10:40:15Z")\
**Posts on this page:** 1\
**Showing post:** 8

<div class="post-metadata">

**Author:** ![bald1one](https://avatars.discourse-cdn.com/v4/letter/b/9de053/32.png) [@bald1one](https://forums.speedlife.net/u/bald1one)\
**Post date:** [January 7, 2008, 4:36pm UTC](https://forums.speedlife.net/t/ls-vtec-build-question/194606/8 "2008-01-07T16:36:48Z")

</div>

> [@Temporarily going unboosted, fuel pressure help](https://forums.speedlife.net/t/temporarily-going-unboosted-fuel-pressure-help/34170/5):
>
> rods need to match the crank pistons should match the rod, but essentially all B series pistons are the same granted the obvious differences…there is no difference in any b series motor except b20 on bore size they are all 81mm.
> 
> and to add to dyingwish on bearings ls bearings are bi metal and vtec bearing (gsr, b16, etc.) are tri metal

got ya thanks

---

_[View the full topic](https://forums.speedlife.net/t/ls-vtec-build-question/194606)._