Check out these two sites

Www.337skymaster.com. user site

Www.skymaster.com. Listing of 337 for sale

I had one for three years, I bought a very good one, and had minor issues.

180 KTAS on 10.6 GPH per engine is burning a lot of gas to go slow. But since this is a Beech crowd, 182 KTAS on 12.5 GPH per engine (some can get that down to 11 GPH per engine) in my previous Baron was hauling ass. Interesting perspective.

You realize this thread is titled 337, right?

In addition, the OP said he was mainly interested in the n/a, but WAS interested in the other versions.

Where did the OP say that he was looking for a cheap alternative to a B55 ? HINT: He didn't.

Where did the OP limit his question to a normally aspirated 337 ? HINT: He didn't.

We get it, Jeff you don't like 337s. My suggestion is to not buy one then.

But let's look at data again, shall we ?

I paid less than 70% for my P337 as I sold my B55 for and I have much better (tens of thousands of dollars) avionics and P&I in the P337 than I had in the B55. My P337 is newer and with less airframe time too.

I paid $2,500 more for my P337 than John recently sold his N/A 337 for, and I got many times that in avionics value in my airplane versus his so maybe Todd is correct that you can buy a P337 for no additional premium over a N/A one today.

I had Paul McCracken do the pre-buy, then annual on my B55. The annual was almost half of what I paid to buy the P337.

I have not see a single B55 listed on BT with similar avionics as my P337 for the same or less money.

The average B55 on BT is listed at more than twice what I paid for my P337.

I've fully admitted that a B55 does some things better than a P337 and a 58P does some things better than a P337. There's no question of that. The P337 is far from a perfect airplane, but for some people, me as an example, it is a better choice. I know you can't understand that but it is true.

Comparing a P337 to a B55, purchase price is much less, it lives in the same hangar, insurance (based on equivalent hull value) is the same, fuel burn for a given trip is the same. Just about every 58P (or P210) owner will tell you that the pressurization system costs very little to nothing to maintain. The P337 has a little more expense in a turbocharger than a B55. It would take more than lifetime of normal flight to make up the difference in purchase price so yes, even though the OP did not ask the question, a P337 can be a cheaper alternative than a B55.

And you get turbochargers and pressurization and in my case intercoolers and air conditioning too.

You can buy a good P337 for the price of a good 172 today.

Jeff - uncork a bottle of wine or take chill pill. We are talking about airplanes - fun stuff- not debating right to life here.

Jeff - uncork a bottle of wine or take chill pill. We are talking about airplanes - fun stuff- not debating right to life here.

Anybody have experience with Riley Super Skyrocket with the TSIO-520's?

Now, that would be an interesting airplane! A baggage pod underneath would be nice also!

I remember when the 520's were put on the P337 and Riley claimed amazing speeds of near 300 mph. I have heard that normal 337 engine compartments were like 10 lbs of sh1t stuffed in a 5 lb bag. It's hard to imagine how they shoe-horned TSIO-520's under the cowling.

I have re-read some articles about the mod from several years ago. I haven't seen anything recent on the airplane. There are two on the market.

Still, 250 knots for around $200k (plus pressurization) sounds great if true. I doubt that it really can go that fast.

If you push the TSIO-360 version of the P337 hard at altitude you can see over 200 KTAS so 250 KTAS might be possible with the TSIO-520s.

We had a P337 with the Riley Rocket conversion. It was years ago and I don't remember the performance numbers but do remember it as serious performer and all around good plane. I never did get used to it's appearance. It wasn't pretty but it was easy to get in and out of, fast and it would haul a load. We usually flew it in the upper teens altitude wise. It was a nice slice of sky. Unpressurized folks below and the big boys above.

Not possible.

Physics says you need double the power to go from 200 knots to 250 knots.

Assuming 285 HP TSIO-520 and 200 HP TSIO-360, the speed increase from power alone would be 12.5%, or 200 increase to 225 knots.

Mike C.