Thank you for all suggestions.....without your suggestions we can't make it better.....

Theres nothing to change. Just shim it for whatever fuel % you run in the instructions.

I would like to add my experience to date with this motor. I broke in as instructions said with no problems.... I experienced a broken pull start spring shortly after breaking in engine. This promted me to fit my roto start back plate purchased with engine.... the small gear in the roto start backplate broke 3 teeth so I removed and replaced pull start.... this second pull starter also broke within first tank of fuel.. just refused to return in.. pulled off and inspected turned out that the knott on the rope ring had split the plastic and caused it to wedge in its housing.... Thats when I realised that the gear from HPI roto backplate fitted and has worked fine to date... I also use a cordless drill with low torque setting now..... if it is possible to find another of these engines when this one expires.... I will not hesitate to buy again.... even with the starting issues.....

I wish there was more availability here in New Zealand.... I wish I could sell and promote them here as R/C nitros are rare here in NZ... yet all that see mine really are interested...

GOOD WORK STS :nod:

we have shipped them as far as Poland. So New Zealand shouldn't be a problem. www.racernine.com

mine says to use 3mm with 20% and 4mm with 30% fuel, so i'm running 20% i got to run 3mm, Do i take 1mm off before break in or after? that was my Q, I know now to do it after but at first i didn't so im sure there would be more people with more q. like this.

cooling head button thread stripped!
 

:cry: Hello people. After reading alot of this thread i bought an sts .28 as my nitrostar 25 crank case SNAPPED on a heavy impact landing up the wronge way on concrete. Today i have been running it in and am very impressed, but i have a big problem. The thread for the glow plug has stripped with little force tightening the plug and now i have fuel pissing out when it is running. Can anyone tell me if i have to get another sts button or will another make fit. As you can imagine it has fustrated me and i dont know where to get sts parts. Any advise will be much appreciated. Thanks.

Two posts above yours.. http://www.racernine.com/sts28.html

The thread must of cross threaded? if there is any resistance when starting the thread stop and try again.

we have the head button for the older two piece head design and the new one peice button/cooling head design in stock

Thanks, would the two piece design be better as the one piece seems very soft unless mine had a fault, also after stripping the engine down i found only one copper head shim, is that right?
cant wait to get it working again i had run about 6 tanks of fuel through my savage with the new engine without touching the mixture settings and and it was starting to wheelie when changing into second gear even though it had fuel pissing out of the head and tonnes of smoke coming out of the exhaust. the gear ratio i am using is 18/47, AMAZING.

P.S. i live in the U.K. how much would the parts be to ship here?

you have a pm

pm?

PM = Private Message :D

Hi Ryan can I ask where you are? and do you sell these engines? thank you

Utah
yea I handle the sales and service for www.racernine.com

I've had this happen to me yesterday during breakin, turns out that the thread on the plug was messed up. I used a new plug and all was good again.

HI Dino!!

Please let me know if you check my engine and what happend

Thanks

Edgar
Puerto Rico

hi all

thinking about buying a sts 28 for my HPI savage. Good idea? will it be much faster then my k4.6? is a bolt stagiht in or will i have to mod?


cheers ;)

yes it will bolt right in and it has lots more power than the k4 motor.

i second that and much much more that the K4. get ready yer 5th wheel or yer Savage X style head protector!!!! :nod:

for me...just gear up..use 47 spur with 19CB.

x3 here.
I'm running 47/18

this motor is awesome!!!

anybody knows between the sts 28 and the surefire .32 which one would be faster?
I just read the article in an rc magazine about the sure fire but they said it only puts out 2.8hp not the 3.6hp that the company claims?

Hey Good people!

I have a question for ya's, a couple of weeks back I sat down and read this thread and others from start to finish taking notes here and there, I noted and from memory it was Dino that wrote his LSN was approx 4 turns out and his HSN was approx 1.5 - 2 turns out. Is this correct?

If so, can you tell me if the top of the LSN is pretty much flush with the brass bit (#21050B)?

I ask as up until now the LSN has been way further out than it is now and my HSN has also been way further out that it is now. I am not sure whether these settings are safe to try!

well thats how his was tuned for his altitude and climate.
you las generally ends up being somewhere close to flush. the hsn usually ends up down inside and not flush with the top of the fitting

yeah it all depends where you live, what kind of car are you running this engine ine? savage? buggy?
my LSN sticks out quite a bit, not sure how many turns i have since i just run my truck and listen to it to see how is running if it needs to be reachen or lean out and then check tempatures. so i don't keep count on turns anymore.

Oh sorry, I am running it in a savage LE 3-spd 19/47 CB/SG.... anything less left me lying upside down.... but I have noticed my carb leaking so I have just sealed that also.... I shall try it later and monitor temps etc

Glow plug!
 

Hy gents! I have a question about glow plugs for the .28STS engine. I drive a LST and due to the fact that my Mach.26 engine is quit damaged i will use my new STS one. burn in is quite OK and I understand the procedure - but which type of glow plug I should use for this STS? And - what is the recommended cooling head temperature during normal run. Here in germany the averrage temperature is about 20-25°C.

OK - thats it for today! :nod:

I like o'donnell plugs.

See bottom left hand side of manual for running temp vs air temp.

http://www.stsrc.com.tw/download/21%...ual%20v3.1.pdf

Operating Temperatures:

15C-25C = 100C
59F-77F = 212F
-
25C-35C = 120C
77F-95C = 248F
-
35C+ = 140C
95F+ = 284F

my place at Sabah East Malaysia, GMT+8, Tropical Island... ppl been saying im running my engine hot as in 130-140C ... in fact thats the normal, racing temp and it performs well. anything lower, will only hinder the performance.
Thats why, ppl not using STS engine always says the engine is not good.actually they dont know whats the right operating temp. I salute STS. Well done. :nod:

dead thread.
lets keep it going.

Who's running the sts .28 on a 1/8 scale buggy??? I just took it out of my savage and dropped it on my inferno 7.5 we'll see how it handles tomorrow at the track.

I have it on my TTR-S3, not tuned yet, I still need to lean it, a lot of tourque, but top-end.... I need a top end pipe

ozpall... this is dino's. i think on page 3 or something.
Dino: im bored, so i just answer this on yer behalf. hope u dont mind. :blush:

cool, i'll post updates on my after i get back from the track. what cb are you running? is 14 too small? man mine is going to pop whelies.

just make sure it fit your engine mount, else you have to grind the mount a little like I did with my OLD MBX-5

as suggested by dino... get this one piece mount from ofna.

http://www.ofna.com/images/new-40590-engmount-big.jpg

I've been running this motor for about 2 gallons now. I am very impressed with it so far.

I'm with jfc_tech on the motor temp issue. I've been running mine at the average temp of 110C and it's not where as quick as my friend's who is running his at about 140C...man that thing screamed!!!

I am thinking about switching to the STS green head .21 once I am done with this .28. My CRT is gonna flyyyyyyyyyyy. :batman:

a couple of our sponsored racer run the .21T motor in thier crt's . They do very well and you get lots better run time.

i wish i have the CRT to test it. no lhs selling it. :mad:

i seldom race my engine using temp gauge to tune it. i ever gone 145C(my pitboy said so...without my knowledge) on my savage. that was like 38-40C outside temp..damn one hot final. managed to stay the whole 4omins race.end up 3rd :flaming:

i have one of the carb inserts in my 28 thats in my jammin, at my local track, it runs about 200 degrees, and i get about 8 min to a tank, and im one of the fastest guys on the track, cant wait to take it to a big track and open her up all the way, i have over a gal through mine and it starts and runs great

thats amazing 8 min at 200 degrees with a carb restrictor????

:eek: :eek: :confused: :confused:
hmm...i think thats on the lean side. if u're talking in Celcius. :nod: