STS .28 pull-start engine
#391
Originally Posted by Car Breaker
regard the sts .28, I wish it is torbo plug, I hate copper shim of standard plug 

A .28TH (turbo head) I can see it now.
#392
Originally Posted by ryan6682
Silver shim is 3mm and copper is 1mm you can run 30% with these shims. if you want you can take the copper out after breakin to run 20%.
STS keeps changing what comes with the motors. first ones came with all three shims for a total of 6mm then they changed to just the sliver 3mm now they put .4mm worth of shims in . I think they readded the shim to make breakin easier on you and the pullstart.
STS keeps changing what comes with the motors. first ones came with all three shims for a total of 6mm then they changed to just the sliver 3mm now they put .4mm worth of shims in . I think they readded the shim to make breakin easier on you and the pullstart.

thanks.
Oscar.
#395
ok I started it the breakin process and so far so good except that i burned 3 spur gears, the cb is melting the spur gear teeth, why is my cb getting so hot?
other wise i let it run for about 2 mins and temps are around 210+/- idles good, stays running for the whole time.
other wise i let it run for about 2 mins and temps are around 210+/- idles good, stays running for the whole time.
#403
i adjusted the idle and the wheels were not turning and the truck was not pushing or trying to go, plus right now is so rich that even if i give it gas with the control it won't move. the last spur (3rd one) last it longer than the first 2. like i said i ordered all new clutch and cb, bearings etc. oh and 5 more spur gears just in case.
#405
Tech Rookie
Joined: Feb 2006
Posts: 13
From: Louisiana
I got my new sts.28 in today and installed it on my Savage. I had to modify a few things, but I have it working now. I put after run oil in before ever pulling crank rope, this really helped.The compression is unreal on this motor. Then I ran 6, two minute cycles with the engine. After this point I started driveing the truck around a little giving it 1/4 to 1/2 throttle. I find the motor to be reved a little high at idle. I am certain that this is due to how rich I am running the motor. Tomorrow I will lean down 1/16 turns at a time to get the idle right. I cant wait to see this bad boy RIP!! The motor sounds awesome.. I like the look to, It is really going to look good passing those T-Maxxes
I am sure that it will make some of the fellas around kinda pissed. Oh well they should have purchased a sts...
Thanks for all of the help on here. I will keep you guys updated on the progress of the truck.
I am sure that it will make some of the fellas around kinda pissed. Oh well they should have purchased a sts...Thanks for all of the help on here. I will keep you guys updated on the progress of the truck.




j/k