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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Tachometer Readings >> SuperTigre S90K
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SuperTigre S90K - 8/9/2012 3:09 AM   
1QwkSport2.5r



Posts: 3717
Score: 155
Joined: 10/15/2006
Last Login: 5/19/2013
From: Cottage Grove, MN, USA
Status: online 		I ran this engine a couple weeks ago and forgot to post my findings.. I haven't seen any other tach readings for this engine on this forum, and I searched all 34 some pages.

72°F air temp, 75% humidity
Italian SuperTigre S90K with stock "swing" muffler, clamped the farthest away from the cylinder, and stock ST carb with flat spraybar.
APC props
McCoy MC59 glow plug
5% nitro 20% castor

13x6 = 12,700rpm slightly rich of peak
13x4W = 13,400rpm slightly rich of peak as well (This prop had some major balance problems, so I will retest with a different 13x4W prop)

I have a mousse can for this engine that I'd like to try but need a header for it.

_____________________________

*Real* glow fuel is made with Methanol, Nitromethane, and Castor oil.

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RE: SuperTigre S90K - 8/13/2012 11:59 PM   
airraptor


 

Posts: 2670
Score: 130
Joined: 1/26/2004
Last Login: 5/19/2013
From: fairfield, CA, USA
Status: offline 		http://www.rcfaq.com/RPMSTATS/RPMINDEX.ASP

it might be in here

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AMA # 186123
I dont always fly inverted, but when I do, I do it down low.

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RE: SuperTigre S90K - 8/14/2012 1:23 PM   
1QwkSport2.5r



Posts: 3717
Score: 155
Joined: 10/15/2006
Last Login: 5/19/2013
From: Cottage Grove, MN, USA
Status: online 		Macs has a header for $40.. For that price, I'm better off getting a Jettstream for twice the cost and 1/4 the work.. A bigger carb is good for a 1000rpm gain, and the exhaust could see 1000rpm gain.. I guess 15k isnt out of the ballpark for this engine on a 13x6 APC.





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*Real* glow fuel is made with Methanol, Nitromethane, and Castor oil.

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RE: SuperTigre S90K - 8/17/2012 5:12 AM   
codycarlisle25


 

Posts: 45
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Joined: 11/6/2007
Last Login: 4/23/2013
From: Sterling City, TX, USA
Status: offline 		A ST 90 turning high rpm like that it will use some serious fuel. Please post your findings.

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RE: SuperTigre S90K - 8/17/2012 6:51 AM   
1QwkSport2.5r



Posts: 3717
Score: 155
Joined: 10/15/2006
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From: Cottage Grove, MN, USA
Status: online
quote:

ORIGINAL: codycarlisle25

A ST 90 turning high rpm like that it will use some serious fuel. Please post your findings.

I get about 15 minutes run time on a 16oz tank running on my airboat. I run 5%nitro 20%castor. Break in used about 2oz/min. I will try testing this engine over the weekend again if I have time.

_____________________________

*Real* glow fuel is made with Methanol, Nitromethane, and Castor oil.

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RE: SuperTigre S90K - 8/22/2012 6:26 PM   
airraptor


 

Posts: 2670
Score: 130
Joined: 1/26/2004
Last Login: 5/19/2013
From: fairfield, CA, USA
Status: offline 		12x10 APC 12,200 on muffler with minor mods

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AMA # 186123
I dont always fly inverted, but when I do, I do it down low.

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RE: SuperTigre S90K - 8/23/2012 3:07 AM   
1QwkSport2.5r



Posts: 3717
Score: 155
Joined: 10/15/2006
Last Login: 5/19/2013
From: Cottage Grove, MN, USA
Status: online 		I wonder if it could do that with a mousse can and a bigger carb. I've heard swapping in an ASP 108 carb is good for a 1k increase, as is a mousse can of the right size being good for another 1k gain. I have it bolted to the stand, I just have to get around to running it.

_____________________________

*Real* glow fuel is made with Methanol, Nitromethane, and Castor oil.

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RE: SuperTigre S90K - 8/23/2012 3:23 PM   
airraptor


 

Posts: 2670
Score: 130
Joined: 1/26/2004
Last Login: 5/19/2013
From: fairfield, CA, USA
Status: offline 		not sure on the OS carb. I just open up the stock carb. Some of the stock carbs can be opened up a lot others cant. If i get another one i will try another carb just to see what the carb swap will offer but to me a 1,000 seems like a very large gain but the engine is a torqer so the small carb may play in to that.

_____________________________

AMA # 186123
I dont always fly inverted, but when I do, I do it down low.

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RE: SuperTigre S90K - 8/23/2012 6:33 PM   
1QwkSport2.5r



Posts: 3717
Score: 155
Joined: 10/15/2006
Last Login: 5/19/2013
From: Cottage Grove, MN, USA
Status: online
quote:

ORIGINAL: airraptor

not sure on the OS carb. I just open up the stock carb. Some of the stock carbs can be opened up a lot others cant. If i get another one i will try another carb just to see what the carb swap will offer but to me a 1,000 seems like a very large gain but the engine is a torqer so the small carb may play in to that.

The Italian mag carb is roughly 9.3mm and the ASP 108 carb is about 11mm. The G90's gain 1k on the 108 carb, so the S90 should do that or better. The S90 is stronger than the G90's from all I've read.



_____________________________

*Real* glow fuel is made with Methanol, Nitromethane, and Castor oil.

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RE: SuperTigre S90K - 8/23/2012 6:44 PM   
airraptor


 

Posts: 2670
Score: 130
Joined: 1/26/2004
Last Login: 5/19/2013
From: fairfield, CA, USA
Status: offline 		I will look at mine tonight I dont know which one i have. I got the engine in a large batch of engines from chip hyde. It says made in Italy. its pretty old but has great compression.

_____________________________

AMA # 186123
I dont always fly inverted, but when I do, I do it down low.

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RE: SuperTigre S90K - 9/7/2012 11:57 PM   
1QwkSport2.5r



Posts: 3717
Score: 155
Joined: 10/15/2006
Last Login: 5/19/2013
From: Cottage Grove, MN, USA
Status: online 		I went through and rebalanced all of my props, blades and hub. I decided to re-run them on the engine and see what it felt like turning today.

71°F / 42% humidity
5/20 fuel, MC59 plug, APC sport props, stock Mag V carb w/ spraybar "straight in".
12x7 - 2100 lowest idle rpm / 12,810rpm
13x6 - 1950rpm / 12,700rpm
13x7 - 2000rpm / 12,330rpm
13x8 - 1890rpm / 11,300rpm

Much less vibration than the last time it ran and the throttle transition is superb.

_____________________________

*Real* glow fuel is made with Methanol, Nitromethane, and Castor oil.

Hide Signatures

(in reply to airraptor)
       Post #: 11

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All Forums >> Glow Engines, Gas Engines, Fuel &amp; Mfg Support Forums >> Tachometer Readings >> SuperTigre S90K
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