I already have a AFE intake system but I wanted to get a new throttle body and I was wondering what the difference was between 50mm, 52mm, 58mm. And also what anyone would recommend for a v8 5.9.
best throttle body?
jbuss28
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Aren't you a barrel of laughs smart guy! So what is a velocity riser or are you going to make us all guess? I know, it's double, triple top secret rocket science, and if you told us you'd have to kill us. You truly are a jerk trolling for confrontation. And what have you come up with lately?
LOL! It's "a" not "e".
Guess the proper term is velocity stack. Sorry for the confusion
http://en.wikipedia.org/wiki/Velocity_stack
http://en.wikipedia.org/wiki/Velocity_stack
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And what I suppose this BBK 52mm is junk!!!!
http://cgi.ebay.com/ebaymotors/99-03-5-2L-5-9L-Dodge-Truck-Jeep-Twin-52mm-Throttle-_W0QQcmdZViewItemQQfitsZMakeQ3aDodgeQQhashZitem5195d606faQQitemZ350406182650QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories
Or maybe this Holley 52mm????
http://cgi.ebay.com/ebaymotors/Holley-High-Flow-EFI-Throttle-Body-112-555-/370463904458?pt=Motors_Car_Truck_Parts_Accessories&hash=item56415e92ca
:huh:
http://cgi.ebay.com/ebaymotors/99-03-5-2L-5-9L-Dodge-Truck-Jeep-Twin-52mm-Throttle-_W0QQcmdZViewItemQQfitsZMakeQ3aDodgeQQhashZitem5195d606faQQitemZ350406182650QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories
Or maybe this Holley 52mm????
http://cgi.ebay.com/ebaymotors/Holley-High-Flow-EFI-Throttle-Body-112-555-/370463904458?pt=Motors_Car_Truck_Parts_Accessories&hash=item56415e92ca
:huh:
Guess you missed the part about adjusting the length and radii to increase the velocity. Little more involved than just tapering the inlet. But I'll let the people with fluid dynamics degrees figure that shit out.
Holley is a knock off F&B that Holley only made because the Frank of F&B brought the design to them when he left F&B, but the design hasn't undergone any design changes since which is why there are always complaints about the Holley TBs making a whistling sound. Where as Bruce has continually tweaked the design to improve performance over the years.
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You're twisting this into something more than it is. The velocity stack is intended:
1.Allow smooth and even entry of air at high velocities into the intake tract with the flow stream adhering to the pipe walls.
This, in esssance, is allowing for a smoother transition of air entering at a high velocity into the main throttle body bore.
The velocity stack can also be tuned for a specific engine combination and power range:
2.Modify the dynamic tuning range of the intake tract by functioning as a resonating pipe which can adjust the frequency of pressure pulses, based on its length, within the tract.
F&B, nor does any other throttle body manufacturer, change the so-called "velosity stack" to conform to custom engine specifications and rpm ranges. On custom fuel injection, where you have one velocity stack for each of 8 ports, the velocity stack may be tuned in such a case, but not with typical throttle bodies. And that is the velosity stack that is changed, not the bore.
http://www.kinsler.com/NewProducts/Pics/JPG/SB_ASCS_XL_Super_Tops_Web.jpg
The bolts that hold the throttle body to the intake manifold are a constant and don't change. There is only so much room within those confines to create a bore. That is why F&B created the octagonal bore in order to come up with what they call a 58mm throttle body. They had to make it work within the standard bolt pattern.
Not going to argue with you anymore. We all know where the performance lies. Yes, if cost is more of a concern than performance, then a ported stock TB will be fine for most people. If performance is the biggest factor in your decision, then I'd recommend looking at one of the billet TBs as they offer the best in all around performance and a lot more options to suit a wider range of performance goals.
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Well said!!!
Whatever you say man. That's what all the people making ported stockers like to think.
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And people making billet TBs want people to believe theirs are better too. What credible and factual information do you have to say any different? The throttle body is an air valve, some billet aluminum, and some cast aluminum. The material alone, cast or billet, doesn't make it flow any better.
Port design and flow tests from F&B that I have seen compared to ported stock TBs. Bruce always said the reason he started making billet TBs was because there was only so much you could do with a stock casting. And I've personally switched from a Fastman ported stocker to a F&B billet and got an increase in performance at the track with nothing else changed on the truck. Your results may vary.
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