Quote:
Originally Posted by Low Impedance
Then explain Logan's 13b-Re n/a that makes more hp than any 6pi ever will.
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How's that tuning
Think about it. Stock you have a rich and non-aggressive timing map. Looking strictly at the engines themselves:
The velocity at the low end will not leave a good torque curve let alone you had to port the 4-port to get to the same amount of intake area, right? Add to that if you're going to be porting the Tii you might as well port the 6-port and have a larger intake area with a finer control on volume (assuming you're leaving the 6pi intact).
Lets look at it another way. Assuming that the stats from the previous post are accurate at that the hp of the modified engine on a standalone is 186hp whp with S5 internals lets compare how they do to the S5 NA which produces 160hp, for sake of argument we'll assume that it loses 20hp and only produces 140whp. That's a 46hp defeciet that it would have to make up right? How much hp can you pick up by adjusting the fuel curve and spark? You can get a butt load. I can honestly see picking up 50-60hp with a standalone. Why? Because you lose some of the most restrictive portions of the intake and you can tune for power instead of fuel economy. 1) you lose the AFM providing less restriction on for the engines intake. 2) you can lean or richen the fuel to make the approriate AFR 3) you can retard and advance the spark to where the power is.
Is that not accurate?