I was getting over 14mins on the D5

Don't get me wrong I love the engine, just the black piston is saying "no no no"

so what causes the black stuff on the piston? is it cabon??

jason

Your engine was a little too lean. At 8~14C I will use hot plug and richer HSN. When you rich the HSN and your engine will cut out after some laps that means the plug is too cold.

I had been using hot plug but switched to medium in attempt to chase issue. I have changed pipe/tank pressure arrangement so I will have more of a play

Dino,

Can you advise if the induction port height is supposed to be uneven on one side? I noticed that the port height is uneven and decided to measure with my calipers.

One of the induction ports is .2mm higher near the boost port than it is near the exhaust port. Other induction port is the same height across the port.

Can you explain if this is correct or just manufacturing tolerance?

can anyone reccomend a good flywheel/shaft but/clutch setup for a sts d5

are all sg sgafts the same diameter?

Yes,it is manufacturing tolerance.

What is your car? Its instruction manual should list the default setting.
same diameter? No. It may have different design. It has the same size in front of front bearing only.

Seems like a large tolerance.

Oh well, I guess we now know the answer to the leaking carbs if there is a .2mm tolerance in any part that deals with fuel delivery.

I knew you dose not really need help. I knew you just want to see predicament of STS. From all of your questions I knew it already. OK,you got it.

Why I started this thread is want to give service to who real need it. I knew there are many dealers hiding all over here. I knew some other guys also want to see STS's joke. In my opinion we don't need to tread on other's head for climbing up. So I almost never appear on other brands threads. It is one kind of esteem. Of course I knew all problems of all brands but I don't want to talk. I don't need to put down somebody to show people that I'm knowledgeably. I'm a traditional Chinese. We think highly of propriety.

Don't blame me why I didn't reply your dealership request. STS want to develop step by step. We don't rush. To produce a better engine is more important to us at the moment. We study engine day and night. The progress speed is terrible. But if production can't catch up with selling,there is no use. That is why I don't want to extend our selling net now. I would like to say sorry to you,buddy.

Don't know what engine you are selling now. Anyway,I still bless you. If you real need help,I'll be there always.

Sincerely,
Dino

I'm not sure why you are taking offense Dino. While I may not be being terribly respectful in your eyes, it is only through frustration, not because I am selling some other engine or whatever. I don't sell any engines at this time. I am in fact a customer.

My frustration also comes from your lack of help in regard to this. If you wanted to speak privately I would have been happy to do so. But to just say 'tough luck it's manufacturing tolerance' is not telling anyone how you are trying to improve the product.

I have had to turn to another motor tuner to try and get some answers on how to best resolve the issue of my motor having a 3.75 degrees difference in port open/close due to .2mm 'manufacturing tolerance'.

I would like to work with you in making the product better but when you offer no advice, there isn't much I can do.

Customer service is what keeps people interrested in a product as much as performance does.

I'm a happy STS engine customer. My opinion might not be fair to ZOOM, but If I were you, I would contact Geoff and ask him for a replacement. He definitely will be glad to help you out. There's no other R/C engine company like STS can do this kind of service. Besides, Geoff at ProjectZen is a very nice guy. He can provide immediately help or advice by giving him a phone call. Dino is more like a mentor here to share his experience. Anyway, this thread is to help the STS customers to solve any problem and also to help STS to collect customers' feedback in order to improve their products.

Chill guys. Bring your R/C car to the track and have some fun. After you come home, logon here and share your experience to all the STS customers.

Peace out.

Do these people answer email? Should I go through Calandra instead? I just need to get replacement bearings in my engine, and it doesn't really matter to me who has them, even if it's from another company. Thanks for any and all help.

It's one of the reasons why I bought the D5R

I'm sure your going to have to call eather place to purchase I would call Projectzen and then call CRC to get it