# couple SIQ GTO's

**URL:** <https://forums.speedlife.net/t/couple-siq-gtos/35701>\
**Category:** NYSpeed Automotive\
**Created:** [September 20, 2007, 11:33am UTC](https://forums.speedlife.net/t/couple-siq-gtos/35701 "2007-09-20T11:33:26Z")\
**Posts on this page:** 1\
**Showing post:** 12

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**Author:** ![traumadog](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@traumadog](https://forums.speedlife.net/u/traumadog)\
**Post date:** [September 20, 2007, 8:21pm UTC](https://forums.speedlife.net/t/couple-siq-gtos/35701/12 "2007-09-20T20:21:45Z")

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[quote=“evilsrt,post:10,topic:35701"”]

What is the reasoning why the LS1 has more power and torque below about 5500 RPM, but then the LS2 has the advantage above that?

[/quote]

Perhaps it’s the breathing. LS2’s have a larger bore (4.000" vs. 3.900"), and therefore larger valves. They also have the old LS6 (243-code) heads, which are also freer-breathing. It probably makes up for the (-) 2 lbs of boost difference up top.

And for me, my car’s more a DD rather than a track car, so a flat torque curve that the Maggie gives is a good thing.

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