STS engines
#2641
Tech Master
iTrader: (33)
The boost port is supposed to store crankcase pressure and release it during a low cycle during scavenging ( exhaust and intake) this is supposed to help bottom end.. but with the newer motors none of them really need it as port and case configuration have made motors scavenge better! I havent seen this used except in the Hyper since around 2002 ish.. seems phased out however it was popular..
as far as the Hyper it might wind a bit farther.. (RPM) but the .28 should by nature have more torque! wich leaves you gearing up as an option.. He should get slightly better mileage but wont be important unless your racing!
as far as adding a boost port its far more work than gain imo.. you wont need bottom end.
as far as the Hyper it might wind a bit farther.. (RPM) but the .28 should by nature have more torque! wich leaves you gearing up as an option.. He should get slightly better mileage but wont be important unless your racing!
as far as adding a boost port its far more work than gain imo.. you wont need bottom end.
#2645
Tech Rookie
i did cold break in on my sts d28 pro 5 port today and while breaking in the motor started to run backwards. meaning motor starts to left then starts running to right . is this bad for it ? has this happened to anyone else.
#2646
Tech Rookie
id like to try some of the sts shoes on my xtm mammoth st with sts d28 pro 5 port. i wonder how theyd work
#2648
Tech Rookie
you can get standard back plate for sts d28m at rc mall in hong kong on ebay. they have most of the sts parts here.
#2650
Tech Rookie
ihave ? can i fit the pro line road rage 40 sieres tires on stock tmaxx rims. any info helpful. thanx.
#2651
Tech Rookie
i got my sts d28 pro 5 port standard backplate #2809 from rc mall on ebay for 118.00 plus 10.00 s/h. this is the best motor i have ever have. it has tons of bottom end and revs all crazy.i recomend it for anyone who has a truggie.
#2652
Tech Champion
iTrader: (4)
I use WOT (wide open throttle) engine break-in. Still tight as new after few gallons. Just changed the conrod I run-in all my engines using this method. Josh cyrul method by the way.
#2654
Tech Rookie
my brother got his hobao hyper 21 race 2.7 hp instead of original hyper 21 with 2.5 , both are 8 ports. my dad has rb 323. a os v spec 21 . a rb c5 21. a rb factory modded c5 21 .a ofna picco max 21 .a power racing 27.a regular hybao hyper 21 8 port. a traxis 3.3 moddod. a os 21with silver crank case . any ways i have a stock xtm 24.7 and the sts d28 pro troggie 5 port. out of all of the motors listed above the sts d28 pro 5 port #2809 is by far the best. it has the most snap off the line and revs like the 21s all day. my dad and brother are cause i beat them all the time . so my brother ordered a jammin jpx28. and my dad ordered a novirossi 528x race. they both want to beat me.
#2655
Tech Rookie
any one know how my sts d28 pro 5 port motor will compare to the jammin jpx28 and the novirossi 528x race. i love my sts i hope it will compete with these other motors.