aluminum flywheel/single vs. dual plane intakes???

[southernfriedcj]

I'm ordering a Roush 402. There is an option of an aluminum flywheel(it comes with a steel FW) for $350.
What are the pros and cons of aluminum over steel for flywheels?
While I've got your attention, how about the single plan vs. dual plan intake manifolds?

TIA

[MJN]

The aluminum flywheel will reduce the rotational inertia of the drivetrain allowing it to accellerate quicker. The engine will feel more responsive. The down side is that if you have a very aggressive clutch package you may find it difficult to pull away from a stop smoothly without slipping the clutch a lot. I have an aluminum flywheel in mine with a Kevlar faced disc and it is not at all bad to drive until you get the clutch hot then it'll grab. If you're building a cruiser get the steel flywheel if you are going to be racing at all go with the aluminum one. Either way get a scattershield (blow proof bellhousing).

[BB427]

I have the aluminum flywheel in my Cobra and I like it alot. The car is light enough that it acts fine when pulling out of a stop. I had an aluminum flywheel in my 69 Mach and did not like it at all I went back to the steel flywheel quickly.

As far as the intake goes if your buying a Roush motor just put on it what they tell you. They will know the deal.

[Mr.Fixit]

With a car as light as a cobra, there is no downside to an aluminum flywheel. (That happens when you get a 3600 lb car with 2.73 gears)

[Cobra20646]

Single plane intakes are better performers in the higher RPM ranges, where a dual plane is more "streetable" allowing better throttle response in the lower to mid RPM ranges.

[southernfriedcj]

Thanks for the info.