RV6A with 200HP

[Gyrodoug]

Good solid feedback. Thank you.

[KGT]

Originally Posted by rvbuilder2002

One difference would be that the horizontal induction RV-8 cowl was designed from the start to have the cooling inlets and outlet sized for the 200 HP angle valve engine.
The standard RV-6 cowl was not. At the very least an RV-7 horizontal induction cowl should be used (but that only solves one of the problems).

On a cooling note I have a modified vertical induction cowl converted to horizontal induction for the AV 200hp. The induction air intake is right below the spinner so all air entering the cowl is for engine cooling.

The weight difference between the 180hp and 200hp was more than I expected. In my case the swap to 200hp and a constant speed prop added about 70 LBs. I agree with Dan I wouldn't want to add the extra weight to the nose of an A model.

Kevin

[gereed75]

It’s your airplane, your money and your TIME. Do what you want but I think you will do a bunch of work and never know the difference

The extra HP will increase speed by maybe 2 knots, the extra climb performance will be negated by the extra weight. I suspect 90%+ of KGT’s performance increase came from switching to a CS prop, not from the engine swap.

Very little juice from that squeeze.

[NewbRVator]

So back to more hp at same weight, engine, gear, etc.

Higher compression and porting seems like the ?easy? answer to extra performance AND it?s getting time for a top overhaul?

[KGT]

Originally Posted by gereed75

It?s your airplane, your money and your TIME. Do what you want but I think you will do a bunch of work and never know the difference

The extra HP will increase speed by maybe 2 knots, the extra climb performance will be negated by the extra weight. I suspect 90%+ of KGT?s performance increase came from switching to a CS prop, not from the engine swap.

Very little juice from that squeeze.

I'm not recommending 200hp AV for the 6A at all. Too much added weight up front. Constant speed Hartzell composite prop is surely a huge impact (I don't believe its 90%) to my performance. It is a great highly refined prop. I believe the prop would be great on a 180hp 6A if you can tolerate the price.

I completely disagree that the climb performance was negated by the added weight as I flew it before and after. Climb performance is amazing!

Worth the squeeze to me, but I enjoy the challenge and the outcome. Each to his own! That's the beauty of building you can do it the way YOU want!

Kevin

[titanhank]

I just flew an io360 angle valve engine, rv6 to the new owner. It is VERY nose heavy. The plane will climb like a rocket, but it is heavy in pitch. I prefer my modded 0320 engine pitch feel on my rv6. The 200hp is being removed and replaced with a narrow deck 0360a1d and prince prop. This plane has an rv7 installed and i really like how it dampens out turbulence. My short tail -6 wags along, but this thing is like having a yaw damper installed.