RV-6A Real World Numbers

[pilotmansam]

Since I was the OP and was challenged to post my own numbers...
Going back to my original question: What are the "real world" numbers for a 150 HP FP RV6-A with regard to max speed? Here is what I got on a speed run lately: Bear in mind, this is an old "slow build" 6A with the old style pants and a 1400 hour engine (with decent compression). Sensenich metal FP prop with the 2600 rpm red-line.

Full throttle
7500 ft.
TAS = 153 kts 176 mph
CHT = 336 F on # 3
EGT = 1295 F on # 4
RPM = 2534
MP = 23.9 in Hg
OAT = 67 F
FF = 11.5 GPM
GS = 178 MPH

[catmandu]

You caught my eye with RV6-A and 1400 hour engine.

I just sold a similarly old plane with that same old designation on the data plate and almost the same time since new engine.

I did a speed run not too long ago, but did not get all the data points you did.

O320-E2A with 9:1 pistons so per @Mahlon 164hp
Sensenich FP metal prop
Sam James wheel pants
One Slick mag, One PMAG
2550 RPM on the throttle
Leaned to slightly LOP
8500 ft. indicated altitude
Indicated TAS = 160 kts
RPM = 2550
FF = 7.5 GPH
GS = 159.5 kts per four point GPS

[blaplante]

Originally Posted by pilotmansam

Since I was the OP and was challenged to post my own numbers...
Going back to my original question: What are the "real world" numbers for a 150 HP FP RV6-A with regard to max speed? Here is what I got on a speed run lately: Bear in mind, this is an old "slow build" 6A with the old style pants and a 1400 hour engine (with decent compression). Sensenich metal FP prop with the 2600 rpm red-line.

Full throttle
7500 ft.
TAS = 153 kts 176 mph
CHT = 336 F on # 3
EGT = 1295 F on # 4
RPM = 2534
MP = 23.9 in Hg
OAT = 67 F
FF = 11.5 GPM
GS = 178 MPH

For 150 HP, 2534 rpm, and the old wheel pants, this is pretty good. There's a post in here somewhere on how much you can gain upgrading the pants.

Edit: found it https://vansairforce.net/community/s...ighlight=pants
3-5 mph
Call it 4 mph, that gets you to 182 mph

Van's published (for 150 HP) is 185 mph at 75% cruise.