Flow : intake vs head
#1
Flow : intake vs head
Anyone able to clearly picture the pros and cons of installing a higher-flowing intake manifold on the same cylinder head?
The only thing I can see at this point is that turbulence will increase with boost if "flow lines" are not perfectly smooth?
The only thing I can see at this point is that turbulence will increase with boost if "flow lines" are not perfectly smooth?
#2
so if your using a stock 951 head it's pointless going to a different intake unless you go shorter in runners to change the peak torque to higher in the rpm range.
#3
I'm not running it now, but plan to re-install my SFR intake and 928TB and SFR intercooler again very soon. The first time I installed those parts, at least at 20psi or so on my 3 liter, I felt a seat of the pants difference. I did not do a comparable before and after dyno, so can't say for sure, but it did feel like it added power. Keep in mind the 951 intake was not designed for 3 liter motors with big cams running 20psi. Even at 2.7 liters on an n/a motor, Porsche saw fit to increase the in take runner size.
#7
I've always assumed that once you start improving part of the overall VE of a motor you almost need to do it all. In other words, putting on a bigger e.g. T/Body or intake for example will only hit a bottleneck somewhere else. Not sure if that's just shade tree theory on my behalf. The stock head doesn't flow much so I wonder if there's a lot of point to improving other parts?
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#8
I've always assumed that once you start improving part of the overall VE of a motor you almost need to do it all. In other words, putting on a bigger e.g. T/Body or intake for example will only hit a bottleneck somewhere else. Not sure if that's just shade tree theory on my behalf. The stock head doesn't flow much so I wonder if there's a lot of point to improving other parts?
logically if your going to change the intake, the cams need to suit the intake and the head should be worked to flow enough air.
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#12
There have been questions about the LR intake for some time. I have no direct experience so can't comment with any veracity but it would be nice to see some actual neutral before and after accounts. Be nice to see if Sid's buddy Dave does some intakes and flows them as well.