Turbo 2.5 subaru performance

eddie

RAF, turbo subaru 230hp
Joined
Jan 19, 2011
Messages
1,683
Location
Polvadera,nm 87828
Aircraft
230 HP turbocharged RAF
Total Flight Time
8,000 plus
greg I honestly don't know,I would say the turbo weighs about 5 lbs,there is no muffler

(the one on the picture has been removed),the radiator is being replaced as we speak

with an aluminiun one the old radiator weighed 22 lbs and was 27" wide(trying to reduce

weight and drag),there is no intake box(intercooler) so I would guess about 15 lbs more than

a single cam 2.5.

My fuel burn is the same with one or two on board I figure about 6-7 GPH @ 3,900 and

about 8 GPH @ 4200. sorry about not knowing the precise weight.

Best regards,eddie.....
 

NoWingsAttached

Unobtainium Member
Joined
May 21, 2006
Messages
4,884
Location
Columbia, SC
Aircraft
Air Command Tandem w/ Arrow 100hp; GyroBee w/ Hirth 65hp; Air Command Tandem w/ Yamaha 150hp
Total Flight Time
>350
Thanks, Eddie! I recently visited a soob shop in TX, the guy had at least two dozen soobs on the shelf, and had a REALLY pretty aluminum soob engine mount he designed and fabricates for a very easy bolt-on to gyrocopter mast and keel. I asked him how much the soobs weighed, he said the 2.5 is over 300 lbs. This surprised me, I thought they were lighter than that. Sounds like the the small weight gain for the turbo is definitely worth the installation.
 

GA Rotor Guy

Newbie
Joined
Nov 27, 2012
Messages
756
Location
Atlanta GA area
Aircraft
Single Dominator
Hey Greg,

Did the guy in TX have a weight for a Sub 2.2? Just curious as to how much extra weight one has to accommodate if they wanted to move from a 2.2 to a 2.5?

As I understand it... many 2.2's run around 130-135HP... while the 2.5's run 150-165HP. Be interesting to do the weight/HP ratio on both apps... then figure a weight/HP for a turbo boosting to around 200HP. I suspect the turbo would win the weight/HP when comparing these 3 motors.

IMO these are definitely 2 place motors... unless one just wants to build a hotrod... :)
 

PW_Plack

Active Member
Joined
Oct 30, 2003
Messages
8,565
Location
West Valley City, Utah, USA
Aircraft
Sport Copter Vortex 582
Total Flight Time
FW: 200 Gyro: 51
My wastegate is on the exhaust side just before the turbo,I do not have any turbo lag...
Eddie, thanks for that. It's been a few years since I drove a car with a turbo, didn't know Soobs were set up that way. I stand corrected!
 

eddie

RAF, turbo subaru 230hp
Joined
Jan 19, 2011
Messages
1,683
Location
Polvadera,nm 87828
Aircraft
230 HP turbocharged RAF
Total Flight Time
8,000 plus
Greg,that is a surprise they weigh that much,the addition of the turbo is actually a very

small amount, and the gain in performance is amazing. When I started replacing my radiator

the weight of that surprised me,I believe that the weight of the 2.2 that was on it

and the weight of the 2.5 will be about the same with the removal of the heavy radiator.

thanks for your interest.

Best regards,eddie.....
 

eddie

RAF, turbo subaru 230hp
Joined
Jan 19, 2011
Messages
1,683
Location
Polvadera,nm 87828
Aircraft
230 HP turbocharged RAF
Total Flight Time
8,000 plus
Paul a lot of the sandrail/dune buggys that run turbo Subaru engines have there turbo's

set up that way,it make more sense doing it that way instead of the way mine is.

Putting my wastegate on the exhaust was just simpler for me.

Best regards,eddie.....
 

paulp

paulp
Joined
Oct 31, 2003
Messages
259
Location
Edmond, OK
Aircraft
Taylorcraft mod 19=RAF2000
Total Flight Time
3800+
Howdy All,

Nowings, what was the name of the shop in Tx and where was it located?

Thanks
 
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