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78 or 90mm LSX

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Old 02-19-2005, 09:29 AM
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Default 78 or 90mm LSX

Guys, I am ready to buy one of thes intakes but am unsure of which will be more suitable for my setup. I don't want to spend the extra money for the 90mm if i don't need to. Here are my specs. 98 T/A, Stage 2 5.3 heads, comp .230/.230/.592,ls6 intake, HS Rockers, 38lb injectors,5177 kit, underdrive crank, 4200 stall. need some advice here, thanks.
Old 02-19-2005, 09:32 AM
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Get the 90mm for your h/c car.

Probably pick up atleast 10hp/10tq over the ls6

Brad
Old 02-19-2005, 09:39 AM
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90mm. Don't think twice about it.
Old 02-19-2005, 09:44 AM
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Originally Posted by SouthFL.02.SS
90mm. Don't think twice about it.
Old 02-19-2005, 09:48 AM
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Thanks for all the input, I have heard alot of conflicting stories on the fast intakes over the ls6 and how they aren't cost effective. But I guess I will give the 90 a shot.
Old 02-19-2005, 10:31 AM
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Originally Posted by str8evl
Thanks for all the input, I have heard alot of conflicting stories on the fast intakes over the ls6 and how they aren't cost effective. But I guess I will give the 90 a shot.
The 78mm intake isn't cost effective at all, but the 90 definitely is. Some have picked up nearly 30rwhp.
Old 02-19-2005, 10:38 AM
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90mm without a doubt. Ive got one for cheap if you need one.
Old 02-19-2005, 11:56 AM
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90mm FAST intake & 90mm TPIS TB = 27rwhp &13rwtq gain on my h/c car over my old LS6 intake and ported TB.




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