High flowing heads - benefits with FI
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High flowing heads - benefits with FI I understand the benefits of good heads on an NA system. How does a FI setup respond to good flowing heads? Assuming no change in compression and the same amount of boost.
I've got a set of TEA 2.5 heads with their nitrous exhaust port and stock chamber size. Assuming I'm making 8psi on stock heads, are there big gains to be had by installing the ported heads?
I've got a set of TEA 2.5 heads with their nitrous exhaust port and stock chamber size. Assuming I'm making 8psi on stock heads, are there big gains to be had by installing the ported heads?
Boost is measured restriction. If you lower the restriction with better flow in the system it will result in more cfm moving in and out which will give you more power. The drop in boost should also show a slight drop in inlet air temp. This should be a positive move.
Kurt
Kurt
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Thank you for the responses.
Let me get this straight - I'll be moving the same amount of air in and out (positive displacement charger). But I'll have cooler charge temps and less boost due to better flowing heads. That means I can increase timing for more power. Correct?
"Boost is measured restriction." In my case, the CFM the blower puts out is set by rpms (Radix). The boost is a result of how difficult it is for the air to enter the engine and the heat generated getting it done. Right?
Any rules of thumb for power increase with better heads and FI?
Let me get this straight - I'll be moving the same amount of air in and out (positive displacement charger). But I'll have cooler charge temps and less boost due to better flowing heads. That means I can increase timing for more power. Correct?
"Boost is measured restriction." In my case, the CFM the blower puts out is set by rpms (Radix). The boost is a result of how difficult it is for the air to enter the engine and the heat generated getting it done. Right?
Any rules of thumb for power increase with better heads and FI?
You would move more air and have cooler temperatures. If you had a stock headed engine doing 450rwhp with a turbo setup, it might have the timing cut back quite a bit due to intake charge temps.
350cfm heads will flow more than 300cfm heads. Increases in engine HP could be significant, like 50HP from a head swap like that. And you should be able to add in more timing.
350cfm heads will flow more than 300cfm heads. Increases in engine HP could be significant, like 50HP from a head swap like that. And you should be able to add in more timing.
Adkoonerstrator
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Don't forget less parasitic drag from the blower since it doesn't have to make as much boost. I'd say 40-50hp is a reasonable guess between lower temps, less drag, and more timing.
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