Full 85mm setup
Full 85mm setup Here is a topic for discuttion that I'll throw out there as someone may already know, I can't get a whole lot out of the search today.
Pro's/Cons to a full 85mm setup - Lid, MAF, TB, and hogged out intake snout to 85mm
Compared to 85mm Lid, MAF, and either stock TB or stock TB opening
As pertaining to a bolt-on motor, any information regarding velocity vs quantity of air, etc..
Here we go I'll add in some more, given a perfect volumetric efficiency a 350ci motor can only move 608cfm@6000rpm and 658cfm@6500rpm, does anyone know the flow rate on the stock throttlebody?
Pro's/Cons to a full 85mm setup - Lid, MAF, TB, and hogged out intake snout to 85mm
Compared to 85mm Lid, MAF, and either stock TB or stock TB opening
As pertaining to a bolt-on motor, any information regarding velocity vs quantity of air, etc..
Here we go I'll add in some more, given a perfect volumetric efficiency a 350ci motor can only move 608cfm@6000rpm and 658cfm@6500rpm, does anyone know the flow rate on the stock throttlebody?
Last edited by Alt; Jan 22, 2009 at 04:07 PM.
Here is a topic for discuttion that I'll throw out there as someone may already know, I can't get a whole lot out of the search today.
Pro's/Cons to a full 85mm setup - Lid, MAF, TB, and hogged out intake snout to 85mm
Compared to 85mm Lid, MAF, and either stock TB or stock TB opening
As pertaining to a bolt-on motor, any information regarding velocity vs quantity of air, etc..
Pro's/Cons to a full 85mm setup - Lid, MAF, TB, and hogged out intake snout to 85mm
Compared to 85mm Lid, MAF, and either stock TB or stock TB opening
As pertaining to a bolt-on motor, any information regarding velocity vs quantity of air, etc..
85mm all the way through, nice to have no weak link.
Last edited by LS6427; Jan 22, 2009 at 03:00 PM.
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Well, I will give a very general answer. The numbers you quoted for airflow are assuing 100% VE. These engines fall in the 1.08-1.12 range as far as VE goes. So, if you take your 658*1.1= 723.8.
The stock LS1 throttle body flows 880cfm @ 28" of water. A good ported one flows 930ish. You would see roughly 5hp when swapping between these throttle bodies. I am not sure what the flow numbers are on a 85mm, but I do know they will make about 5-7hp at the wheels.
Now, it really doesn't make sense, but it does make more power. I would guess you could pick up around 10rwhp if you switched and did all of the changes.
Hope this helps.
The stock LS1 throttle body flows 880cfm @ 28" of water. A good ported one flows 930ish. You would see roughly 5hp when swapping between these throttle bodies. I am not sure what the flow numbers are on a 85mm, but I do know they will make about 5-7hp at the wheels.
Now, it really doesn't make sense, but it does make more power. I would guess you could pick up around 10rwhp if you switched and did all of the changes.
Hope this helps.
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