[Z06] LS7 with a flat plane crank?
07-13-2011, 08:11 PM
#141
Racer
Member Since: Nov 2001
Location: Pearland TX
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Just some fun engineering back of the envelope...
IF you wanted to use the LS7 type architecture and make a 180* "flat plane" crank work:
As i mentioned before, Minimize the 2 order harmonics by destroking the engine and making really long connecting rods.
Based on the article above: F1 engines have a Bore/Stroke ratio of 2.46.
The LS7 has a:
bore: 4.125, stroke: 4.0 in.
Destroking the LS7 using the same bore/stroke ratio of F1 would yield a:
Bore: 4.125, STROKE: 1.68 in.
This makes the new displacement: 179.6 cu in (2.94L).
i would round these to 180 cu in (3.0L).
I would bet this engine config. would rev like crazy!!! assuming the top end could handle it...
If i was restricted to a 3.0L racing class this would be a great base engine to start with. Compact in size, low weight/mass, low CG, ect.
For the street, you would lose all the TQ and some HP but it would sound fantastic.
IF you wanted to use the LS7 type architecture and make a 180* "flat plane" crank work:
As i mentioned before, Minimize the 2 order harmonics by destroking the engine and making really long connecting rods.
Based on the article above: F1 engines have a Bore/Stroke ratio of 2.46.
The LS7 has a:
bore: 4.125, stroke: 4.0 in.
Destroking the LS7 using the same bore/stroke ratio of F1 would yield a:
Bore: 4.125, STROKE: 1.68 in.
This makes the new displacement: 179.6 cu in (2.94L).
i would round these to 180 cu in (3.0L).
I would bet this engine config. would rev like crazy!!! assuming the top end could handle it...
If i was restricted to a 3.0L racing class this would be a great base engine to start with. Compact in size, low weight/mass, low CG, ect.
For the street, you would lose all the TQ and some HP but it would sound fantastic.
07-13-2011, 11:06 PM
#142
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