Fastman t body 50mm
All Star
Joined: Jan 2009
Posts: 907
Likes: 2
From: Corrales, New Mecico
52mm is a totally different ballgame...only benificial if you have a 360 with mods to help it breath better like a better flowing exhaust and heads or at least 1.7 rockers.. to get the air out as fast as it gets in.... its not recommended for stock 360's or mild 318's...you actually lose power throught the low and mid range..with the latter.
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From: Sioux Falls, SD
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Joined: Aug 2010
Posts: 2,697
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From: Cape Carteret NC
was there something wrong with your stock TB?
The only gain with a bigger one is 'more air quicker', which can be remedied with the smaller one with more pressure on the skinny pedal.. wayWAY up top you get more air, but, honestly, how often are you guys above 5kRPM?
the 'throttle response' is simply because you're tossing more air quicker.. the stock TB narrows from 50mm above the butterflies to 46mm below to create a laminar flow- to smooth the turbulence out, so to speak.. it doesn't really matter with a kegger manifold because the 'plenum' or 'air-reservoir' is huge and basically without any flow enhancers, but I'd venture that it absolutely would on a M1 or Air-Gap.. a matter of fact, that laminar flow feeding a a-g or m1 would likely make up for the missing mm's in the orifice opening..
the keg has a massive air reserve in that plenum- much larger than most intakes have.. it doesn't struggle for air unless it's wide open- and even then, the flow characteristics change dramatically.. I'd opine THAT change is a limiting factor inherit to the kegger more so than the size of the tb intake..
now if you were feeding a heavily modded engine (internal) or bored/stroked/boosted, that extra flow capacity would be a good thing- and an even better thing if it was something like 55-60mm north of the flies, and still tapering to something like 52~54mm south of the flies.. that laminar creating function of the taper is pretty significant..
The only gain with a bigger one is 'more air quicker', which can be remedied with the smaller one with more pressure on the skinny pedal.. wayWAY up top you get more air, but, honestly, how often are you guys above 5kRPM?
the 'throttle response' is simply because you're tossing more air quicker.. the stock TB narrows from 50mm above the butterflies to 46mm below to create a laminar flow- to smooth the turbulence out, so to speak.. it doesn't really matter with a kegger manifold because the 'plenum' or 'air-reservoir' is huge and basically without any flow enhancers, but I'd venture that it absolutely would on a M1 or Air-Gap.. a matter of fact, that laminar flow feeding a a-g or m1 would likely make up for the missing mm's in the orifice opening..
the keg has a massive air reserve in that plenum- much larger than most intakes have.. it doesn't struggle for air unless it's wide open- and even then, the flow characteristics change dramatically.. I'd opine THAT change is a limiting factor inherit to the kegger more so than the size of the tb intake..
now if you were feeding a heavily modded engine (internal) or bored/stroked/boosted, that extra flow capacity would be a good thing- and an even better thing if it was something like 55-60mm north of the flies, and still tapering to something like 52~54mm south of the flies.. that laminar creating function of the taper is pretty significant..
Last edited by drewactual; Mar 6, 2012 at 09:16 AM.
Veteran
Joined: Sep 2011
Posts: 369
Likes: 1
From: cedar hill mo
So what would be the difference between the fastman and the big gulp from hughes? Looking at getting one or the other. Will i gain a whole lot with the 900 cfm with the big gulp? All i have done to my motor is the kegger mod
Champion
Joined: Aug 2010
Posts: 2,697
Likes: 3
From: Cape Carteret NC
what's the difference in distance you press your go foot? That's pretty much the difference you'd feel- instead of having to press it 1/4 way to reach 2200rpm, you'd only have to push it 1/8...
what you will LOSE, though, is the ability to minutely alter RPMs via go foot..
it's a floggin' waste of money unless you are feeding A LOT more air through the engine- supported with intake manifold, ported heads, bigger valves, bumpy cam, opened exhaust, ect.... and this os coming from someone who has a fastman 52..
what you will LOSE, though, is the ability to minutely alter RPMs via go foot..
it's a floggin' waste of money unless you are feeding A LOT more air through the engine- supported with intake manifold, ported heads, bigger valves, bumpy cam, opened exhaust, ect.... and this os coming from someone who has a fastman 52..
Professional
Joined: Nov 2011
Posts: 232
Likes: 0
From: West Virginia
^ agreed. I bought into the hype AND didn't return my core fast enough because of my motor swap. If ppl are looking into it I'd tell ya to put the money elsewhere for now, possibly the gas tank!
Champion
Joined: Aug 2009
Posts: 3,015
Likes: 8
From: Western NY,
was there something wrong with your stock TB?
The only gain with a bigger one is 'more air quicker', which can be remedied with the smaller one with more pressure on the skinny pedal.. wayWAY up top you get more air, but, honestly, how often are you guys above 5kRPM?
the 'throttle response' is simply because you're tossing more air quicker.. the stock TB narrows from 50mm above the butterflies to 46mm below to create a laminar flow- to smooth the turbulence out, so to speak.. it doesn't really matter with a kegger manifold because the 'plenum' or 'air-reservoir' is huge and basically without any flow enhancers, but I'd venture that it absolutely would on a M1 or Air-Gap.. a matter of fact, that laminar flow feeding a a-g or m1 would likely make up for the missing mm's in the orifice opening..
the keg has a massive air reserve in that plenum- much larger than most intakes have.. it doesn't struggle for air unless it's wide open- and even then, the flow characteristics change dramatically.. I'd opine THAT change is a limiting factor inherit to the kegger more so than the size of the tb intake..
now if you were feeding a heavily modded engine (internal) or bored/stroked/boosted, that extra flow capacity would be a good thing- and an even better thing if it was something like 55-60mm north of the flies, and still tapering to something like 52~54mm south of the flies.. that laminar creating function of the taper is pretty significant..
The only gain with a bigger one is 'more air quicker', which can be remedied with the smaller one with more pressure on the skinny pedal.. wayWAY up top you get more air, but, honestly, how often are you guys above 5kRPM?
the 'throttle response' is simply because you're tossing more air quicker.. the stock TB narrows from 50mm above the butterflies to 46mm below to create a laminar flow- to smooth the turbulence out, so to speak.. it doesn't really matter with a kegger manifold because the 'plenum' or 'air-reservoir' is huge and basically without any flow enhancers, but I'd venture that it absolutely would on a M1 or Air-Gap.. a matter of fact, that laminar flow feeding a a-g or m1 would likely make up for the missing mm's in the orifice opening..
the keg has a massive air reserve in that plenum- much larger than most intakes have.. it doesn't struggle for air unless it's wide open- and even then, the flow characteristics change dramatically.. I'd opine THAT change is a limiting factor inherit to the kegger more so than the size of the tb intake..
now if you were feeding a heavily modded engine (internal) or bored/stroked/boosted, that extra flow capacity would be a good thing- and an even better thing if it was something like 55-60mm north of the flies, and still tapering to something like 52~54mm south of the flies.. that laminar creating function of the taper is pretty significant..
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Joined: Aug 2009
Posts: 3,015
Likes: 8
From: Western NY,
For the same reasons related to why the kegger mod and cutting down runner size kills hp and torque on the mid and lower rpm range.