# LT1 guys, need some help.

**URL:** <https://forums.speedlife.net/t/lt1-guys-need-some-help/187600>\
**Category:** PittSpeed Automotive\
**Created:** [January 23, 2007, 2:58pm UTC](https://forums.speedlife.net/t/lt1-guys-need-some-help/187600 "2007-01-23T14:58:26Z")\
**Posts on this page:** 1\
**Showing post:** 21

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**Author:** ![eurodad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/eurodad/32/5988_2.png) [@eurodad](https://forums.speedlife.net/u/eurodad)\
**Post date:** [January 27, 2007, 6:19pm UTC](https://forums.speedlife.net/t/lt1-guys-need-some-help/187600/21 "2007-01-27T18:19:35Z")

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> [@Feeling the Pressure yet?](https://forums.speedlife.net/t/feeling-the-pressure-yet/27352/31):
>
> maybe in a manual car, but not in a stock auto LT1. the 503’s powerband doesnt kickin until 1800rpm, where as the 305 hits at 1500. If you have an auto, with a stock TC, the 305 hits right where you stall at. other than that and the 4deg seperation in duration they are exactly the same

:crying:

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