Version1/2 intake versus Version 3/4 design

[Guest]

Just wondered how the two different approachs to intake design stack up against each other. Has anyone gone from the early system to the later? Youd expect the later design (under manifold) to flow better having eliminated the series of 90 degree bends, but on the other hand it would suffer more from heat soak. Also the later design narrows considerably where it passes the power steering unit. Many are going for twisted turbos etc, but does anyone know the approx power limits of these standard intake designs? Obviously throttle response is another variable...

[Optical]

a guy on here tested them back to back with datalogs to see the power differences

more top end and lag from the v2 type - shorter runners, bigger plenum

more torque and response from the v3 type - longer runners smaller plenum

pretty much the same power overall, just a slight shift in the power band

i dont really like the v3 manifolds, the runners all flow differently. I dont really like the v2 ones either as they narrow a whole lot where the injector seats are. But that can be ported out a bit to solve that issue.

[Guest]

Thanks Optical, do you have any info the differences of the air filter to turbo design? Wonder if the later system with its 90 degree elbow removed is a noticable improvement over the early set where you have the two 90 degree bends one after the other?

[Optical]

yeah would be noticeable after a certian power level. although both are pretty shit designs

if you replace the power steering pump with a remote reservoir one you can fit a 2.5" pipe under the v3/4 manifolds