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HelicopterMain Discussion › Your tuning settings for TT70 engine ?
05-03-2004 03:55 AM  13 years agoPost 1
Raptor-30-V2

rrVeteran

Tromsø - Norway

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I have found it verry ahrd to tune this engine and I have almost decided to sell it and buy myself a OS70, but I thought I will give it a secound try. Whats your tuning settings for the TT70 H Pro on a R60 using 15% nitro ?

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05-03-2004 05:49 AM  13 years agoPost 2
SPB

rrElite Veteran

Athens - Greece

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I also have some problems tuning mine even though I have to admit I am not a guru on engines tuning but so far I have seen that not so many ppl here answering in this question for the specific engine. There are not so many posts either in the search function.

I am still breaking in mine so I am working it very very reach. So reach that spits fuel from the exhaust. I know that TT engines like to run reach so I prefer the safe way. My recent settings are 3 1/4 turns open both needles with Enya #3. A friend told me to use Enya #4 in this engine so I am just waiting for this plug to die and replace it with #4.

I read that someone had both needles 4 turns out but mine dodn't even start with these settings. Actually I started with 4 turns out the small needle and 1 1/2 the main and little by little I opened the main and closed 3/4 the low.

For now works OK for me but deffinetely these settings are not correct. My engine runs cool very cool but still spits fuel from the exhaust.

BTW I don't agree with you to buy the OS. A friend of mine did the same thing and this is the inside of the OS 1 month later

We changed the bb in his "precious" OS Max after only one month. The bb were exactly the same as the ones TT is using so I don't think that you are buying supperior quality. You will pay 100 Euros more just for the name.

Another friend had a 200 Euros crash because the OS 70 blew the piston (known problem for OS 70 engine make a search here).

Also tunning OS is not much easier. So IMHO stick with TT it's a cheap reliable motor and just in case you will need to replace it you will not have to spend a fortune.


Sotiris
myhelis.com Flying Team

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05-03-2004 05:57 AM  13 years agoPost 3
Peter65

rrKey Veteran

Roxby Downs, South Australia.

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I have just been going through the same problem. I have put a Hatori SB16 muffler on it and had to reduce my needles atleast 1/2 a turn each originally.
Now the temps have dropped here I had to retune again yesterday. Took me 3 tanks to get close. It would idle fine and throttle up fine but after flying about then dropping throttle for decent it would lean off and overspeed.

Landed and played with needles a little more and ended up with about 2 2/3 turn on high and around 3 on the low. Temps are fine and caan hold finger on back plate no problem. It could go a click or 2 leaner I would think. I still have plenty of smoke with these settings but atleast it's not leaning out in flight when I drop throttle now

But this enging is a bitch to tune. I will put my YS back in as soon as I can get the required parts. On that where is the best place for YS parts?

Laughing at yourself will lengthen your life. Laughing at me will shorten it...

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05-03-2004 12:52 PM  13 years agoPost 4
Raptor-30-V2

rrVeteran

Tromsø - Norway

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Thanks for the great answares! But the problem is, you people are atlkng about two needles, I can only find one at mine... Do you have any upgrade carb or somthing?

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05-03-2004 02:00 PM  13 years agoPost 5
SPB

rrElite Veteran

Athens - Greece

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The second one is hidden in the throttle barel. Just look from the side your throttle arm is you will see hiden inside the throttle barel a small screw. This is the second needle the so called low needle.

This one controls the mixture from idle up to 70% open throttle.

The maximum performance of your engine will be obtained with the balanced tuning of both needles.

I suppose that you are pretty new in engines tuning so you better ask from a more experienced pilot to help on this or you might cook the engine and we don't want this

From the other hand if you need anything else just let me know. I will do my best to explain to you anything you need


Sotiris
myhelis.com Flying Team

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05-03-2004 02:12 PM  13 years agoPost 6
Raptor-30-V2

rrVeteran

Tromsø - Norway

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Yeah I know, Im a bit n00bi... I think I will stick with the TT and get some one to help me with the tuning. Any one how knows if the metal fan for OS 70 engine will fit the TT 70 ? I yust bought one here on runryder but I don't know if it will fit the TT70.

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05-03-2004 02:19 PM  13 years agoPost 7
Such5rrApprentice - Grand Haven, Michigan - My Posts: All  Forum  Topic

Yes, it will fit.

O.S. and T.T. have the same size crank / threads. Should be a perfect fit.

P.S. I run a TT 70 in my Raptor and have run a few gallons through it and it is a great engine!

Brett

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05-03-2004 02:22 PM  13 years agoPost 8
Raptor-30-V2

rrVeteran

Tromsø - Norway

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Well, then Im pritty sure that I will keep my engine. But If I want more power, will it help alot to chance from the stock muffler to a hatori ?

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05-03-2004 07:27 PM  13 years agoPost 9
SPB

rrElite Veteran

Athens - Greece

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As such5 said the fan fits perfect don't worry just make sure you are not using the piston locking tool that bolts into the glow plug threads. It might destroy your piston.

Also put some blue loctite in the nut.

I think the stock muffler is very good and gives enough power to the engine. A friend of mine has a two piece Hatory to his 60 but it's two noisy and (personally) I don't like the look of it.

But after all it's your choise.


Sotiris
myhelis.com Flying Team

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HelicopterMain Discussion › Your tuning settings for TT70 engine ?
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