Engine Dyno Testing LS3 Intakes INSIDE!!
09-27-2009, 08:25 PM
#23
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The graph is large, look at the 2nd graph..
Its a difference graph, its easier to see the differences. It basically says:
FAST LSXR: 16.6 ft lb peak gain and 15.20 peak HP gain.
Ported LS3: 11.6 ft lb peak gain and 13.25 peak HP gain.
It also shows the FAST is up about ~10HP and ~10 ft lbs(on average) through the mid range(3600-5500 RPM) over stock LS3 intake. And ~5HP and ~5 ft lbs(on average) over the Ported LS3 in the same area. At the end of the pull both intakes are gaining over the stock one.
Does that help out explaining the 2nd graph and how to read it? Seems like everyone is concentrated on the top graph only trying to read between the lines.
Its a difference graph, its easier to see the differences. It basically says:
FAST LSXR: 16.6 ft lb peak gain and 15.20 peak HP gain.
Ported LS3: 11.6 ft lb peak gain and 13.25 peak HP gain.
It also shows the FAST is up about ~10HP and ~10 ft lbs(on average) through the mid range(3600-5500 RPM) over stock LS3 intake. And ~5HP and ~5 ft lbs(on average) over the Ported LS3 in the same area. At the end of the pull both intakes are gaining over the stock one.
Does that help out explaining the 2nd graph and how to read it? Seems like everyone is concentrated on the top graph only trying to read between the lines.
11-07-2009, 06:09 PM
#24
GM Intake has a 90mm cable TB
FAST Intake has the 102mm FAST TB
Wanted to use the 90 for both to better simulate the LS3 TB but after bolting it on, there was a small spot at the bottom where the larger intake inlet would not seal with the 90mm completely.
I'm pretty sure the MAF was a small restriction, just more apparent with the ported intake and FAST intake.
FAST Intake has the 102mm FAST TB
Wanted to use the 90 for both to better simulate the LS3 TB but after bolting it on, there was a small spot at the bottom where the larger intake inlet would not seal with the 90mm completely.
I'm pretty sure the MAF was a small restriction, just more apparent with the ported intake and FAST intake.
