Good info on the LS7 intake...
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From: Toronto
Good info on the LS7 intake... I have been wondering how GM's new LS7 intake would work with a good set of LS7 style heads like ETP's... The following info combined with the results of the current C6 Z06 dyno testing leads me to believe the LS7 intake is a solid piece!
http://www.corvettels7.com/06_PWT_LS7.pdf
Low restriction intake and ported cylinder heads
A new low restriction intake system is used, with approximately 20 percent less restriction than the intake in the 6.0L V-8. A new drop-in mass airflow sensor minimizes flow restriction. The intake manifold is a new 3-piece friction welded port-matched composite unit. The large straight intake runners are designed to maintain fast airflow velocity, while air volume increases 18 percent over the 6.0L V-8. The filter element is supplied by Donaldson Company, Inc., known for high-performance and racing filters.
http://www.corvettels7.com/06_PWT_LS7.pdf
Low restriction intake and ported cylinder heads
A new low restriction intake system is used, with approximately 20 percent less restriction than the intake in the 6.0L V-8. A new drop-in mass airflow sensor minimizes flow restriction. The intake manifold is a new 3-piece friction welded port-matched composite unit. The large straight intake runners are designed to maintain fast airflow velocity, while air volume increases 18 percent over the 6.0L V-8. The filter element is supplied by Donaldson Company, Inc., known for high-performance and racing filters.
hmmm, 20% less restriction than the 6.0L. I'm assuming they mean the LS2 intake. not sure how promising that is. the FAST 90mm is better than the LS2. would that make the LS7 ~equivelant to the FAST 90?
20% less restriction and 18% more volume. not bad
20% less restriction and 18% more volume. not bad
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The LS7 intake mani has a huge cross section, nearly matching that of the heads.
Intake mani's are basically tubes or pipes, so unless there is some kinks or kneck downs in the system one can assume that larger cross section equal larger flow.
No one still has given us LS7 intake numbers flow without heads attached and
LS7 head/intake numbers with intake mani attached at valve lifts from .200" to .800".
My guess has always been that with intake bolted to the heads, that flow is 325CFM.
That the mani by itself flows closer to 350CFM. No one has confirmed this yet.
Intake mani's are basically tubes or pipes, so unless there is some kinks or kneck downs in the system one can assume that larger cross section equal larger flow.
No one still has given us LS7 intake numbers flow without heads attached and
LS7 head/intake numbers with intake mani attached at valve lifts from .200" to .800".
My guess has always been that with intake bolted to the heads, that flow is 325CFM.
That the mani by itself flows closer to 350CFM. No one has confirmed this yet.
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From: Toronto
How would those numbers compare to a Fast 90 LSX intake?
Originally Posted by Big-DEN
The LS7 intake mani has a huge cross section, nearly matching that of the heads.
Intake mani's are basically tubes or pipes, so unless there is some kinks or kneck downs in the system one can assume that larger cross section equal larger flow.
No one still has given us LS7 intake numbers flow without heads attached and
LS7 head/intake numbers with intake mani attached at valve lifts from .200" to .800".
My guess has always been that with intake bolted to the heads, that flow is 325CFM.
That the mani by itself flows closer to 350CFM. No one has confirmed this yet.
Intake mani's are basically tubes or pipes, so unless there is some kinks or kneck downs in the system one can assume that larger cross section equal larger flow.
No one still has given us LS7 intake numbers flow without heads attached and
LS7 head/intake numbers with intake mani attached at valve lifts from .200" to .800".
My guess has always been that with intake bolted to the heads, that flow is 325CFM.
That the mani by itself flows closer to 350CFM. No one has confirmed this yet.
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From the looks of things, the Fast 90 runners can fit INSIDE of the LS7 manifold.
Fast 90 with heads attached has always shown to be under a 300CFM affair when bolted to cyllinder heads.
We need someone to confirm this for us.
Fast 90 with heads attached has always shown to be under a 300CFM affair when bolted to cyllinder heads.
We need someone to confirm this for us.
