# Thoughts on high compression turbo builds

**URL:** <https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396>\
**Category:** Shift518 Automotive\
**Created:** [February 24, 2009, 10:05pm UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396 "2009-02-24T22:05:45Z")\
**Posts on this page:** 1\
**Showing post:** 53

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**Author:** ![94Gt5.0](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/94gt5.0/32/6377_2.png) [@94Gt5.0](https://forums.speedlife.net/u/94Gt5.0)\
**Post date:** [February 25, 2009, 12:51pm UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396/53 "2009-02-25T12:51:28Z")

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> [@FS: 94 CIVIC D15B7 LONG BLOCK, TRANNY](https://forums.speedlife.net/t/fs-94-civic-d15b7-long-block-tranny/14681/7):
>
> If it were to only be boosted, say 10 psi, would E85 still be necessary?
> 
> Theres something I’ve been wondering about turbos too, is 10psi on a smaller turbo the same as 10 psi on a larger turbo? Basically what I’m asking is will the output be the same on either turbo if its only boosted 10psi?

Its not that its necessary or not. It would allow you to run more timing/boost. You should be able to run 10psi on 93 with the right tune. But at the same psi with E85 you could run more timing, making more power.

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