FAST 90/90 or FAST 92/92
FAST 90/90 or FAST 92/92 I will be doing shortly a TSP PRC 2.5 5.3 setup on my LS1, with 150 shot in mind. What intake would be better? 90/90 or 92/92, and why did FAST just up it two mm?
from what I've seen the shops say on here they no longer make the 90 intake so u might be hard pressed to find one. just get the 92 and like stated above there isn't much of a difference, juse 2mm more of an opening.
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The 2mm does not make a big difference. The big thins is the stainless hardware. No more rusting within 2 weeks. Also the TB gasket is better. The biggest improvement is the MAF sensor hole is the right size now. 
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the larger it gets the more area it gets . looking at area and if my math is right a circle is pie x radius squared . so 90mm tb would be 6358.5 a 92 would be 6644.24 . if you go back to look at a 91mm it would be close to 6500.59 . so 90 to 91 is an increase of roughly 142 . the increase from 91 to 92 is a little more than that being 143.65 .
so this means since it it just two more mm it is not equal to the difference of the increase of one at a time . every mm adds that and then some even though it might not be a whole lot more .
so this means since it it just two more mm it is not equal to the difference of the increase of one at a time . every mm adds that and then some even though it might not be a whole lot more .
I cant wait til the FAST 164mm comes out !!! It will be so cool!!!! Ill flow .0003% more air and go .001 quicker at the track!! It will be worth all $1500 ill have to pay for it!! 
WTF are some people thinking??
WTF are some people thinking?? 
^ Think of the TB size this way, PatG was still pulling vacuum at WOT on one of his setups... The restriction is the TB size.. The CARB guys go instant 0 vacuum at WOT.. think of the opening size difference. It's basically a metered orifice, or a restricted opening. Lets try to eliminate as much loss as possible. I think if they did a slightly bigger TB/Intake design, they could get pretty close to 0 vacuum @ WOT.. As if the 90/90 isn't big ENOUGH, tho.. 
On a side note; The price on the FAST 90/90's came WAY down!! :shock: I'm thinking of getting one for the H/C swap this month..
On a side note; The price on the FAST 90/90's came WAY down!! :shock: I'm thinking of getting one for the H/C swap this month..