Anyone currently using this mill?

I'm thinking about buying one, but don't have any real world info on it.

It looks promising, but it's pretty high $$$.


So far, I am really pleased with the 2 OS engines I already own. (.12 TZ and .28XZ)
Plenty of power and easy to tune.



Any info out there?


Scott

The OS speed is the almost same thing as the VZB Vspec i got. The only difference, except the price of course, is the head (i think) and the colour. The weight is lighter than the standar Vspec (the blue one). Here a site: http://osengines.com/engines/osmg2081.html

Are you racing very pro? These engines are beasts, but is a shame to bash with these engines, lol Also, a very high price engine!

There are more differences.

Sure but can't tell

Like the bearings are ceramic, the crank has better balance and the ports are timed better.

So why say it's the same then?

i have the SPEED aluminim head, it seems to get better fuel economy than the standard vspec it's not fully broken in though so i can't really give any specific details on the power, it seems much smoother than the standard one also but this could be due to the fact that it isn't fully broken in.

I say that? Sorrry. I meant ALMOST the same one The engine cost 200 dollars more than the standard for a reason, right?

I have been very sceptical about this posters comments through all the threads I read through, his demina is enthusuastic but uninformed and his comments are helpless and contradictory and if you can make any sense of his words your lucky. But saying youcan't tell, that is complete rubbish, I went from the bluehead Vspec to a Speed 4 months ago and have noticed that along with smoother power lay-down and geting another 1:20/tank at race pace it actually looks nicer through my shell than the blue did.

The SPEED is one hell of a buggy engine,they are not the same as stock motors and have a noticeable performance increase.They have ceramic bearings,hardcoated crank,improved port timing,oil hole in the rod and work done to the crank case.all things which the stock vspec does not have.

The piston and sleeve work does next to nothing though,i have rebuilt a speed with a stock vspec piston and liner with a speed rod and it goes as hard as the normal speed and gets the same economy,just incase anyone was curious.

its worth the money,brilliant race motors with classic OS reliability and power

That just doesn't make any sense. You say they have improved port timing and yet the stock V Spec piston/liner gives the same result.
Now, new bearings and improved case and a lube hole in the rod can't possibly warrant a $200 premium.

WOW someone needs to open there eyes and read what i said.I stated the claimed improved port timing does NEXT to nothing as i get the same results out of a speed with a stock piston and liner,so the changes in the sleeve are very minimal.

I suggest you have a better read next time buddy

I've seen both and owned the blue head v-spec.
Not much differences if at all any, as far as performance is concered.
Yes it does have silicone in the crank, and inserts and PLA PLA PLA but all these at the end add to costs and offer "not much" in performance.

As for fuel economy if you do read all the threads available on these two engines from this forum and others you will get different opinions.
Other say the speed has more runtimes but others suare by the blue head that gets better.
You can't get a true answer on this topic...yes an estimation on what it can do but not the real thing.
I bet both get excellent mileage but IMO i wouldn't be paying almost $200 more to get the speed.
Get the original blue head...break it in fully (1-2G) and then replace the rod and the bearings with ceramic and you are done for the rest 7-8 gallons and more.

The fuel economy matter it depends. The reason that everyone has his own opinion is because the needle settings are different

It's not needle settings that affect the most when it comes to runtimes...fuel and tuned pipe will give you up to 4-5mins difference on the v-spec.
Needle settings more or less are around the same if the engines are tuned right according to weather conditions.
The weather affects those settings but it won't alter the runtimes more than 1 minute or so.

I've DRIVEN both and tried them in the same car with the same pipe and the same equipment, i can assure you that the speed gets better fuel economy and the power is much more manageable.
I wouldn't insist on this if i didn't think it was fact.
I will agree with you on the fact that the price/performance ratio is on the weak side, but it's still ignorant to claim that there's little to no difference between engines.

We must also admit that we (average drivers) might never use any of these engines to their full potentials but if a pro is able to cut 3 seconds of his best lap and run two laps more between pit stops, it's probably worth the extra 200$ now you have to decide wether or not you can put this engine to good use or if you'd be better off with a standard v-spec.

It is, but would the pro be paying for the engine in the first place?

Well, I guess average joe's have to pay to be like the pros lol

Speed actually makes less power on the dyno.... less torque then the standard and slightly more HP..... but for pure power increase over the v-spec the Speed doesnt offer much....


But !!!!!! a big but here..

The Speed has a weighted crank... People may tell you it helps with engine balance, but thats pure rubbish really and not the true intended purpose of a heavy crank.....

In the last couple of years the big name companies like RB and Nova have gone to extremely heavy cranks in their motors... They have decided the heavier cranks make the motors more manageable on the bottom end... Making the engines come onto power smoother which also can make a huge difference in traction and maintaining traction..... As the heavy cranks act like adding a heavy flywheel to a car, they heavier the flywheel the more resistance to rapid RPM fluctuations and spikes........Adam Drake runs a very heavy custom steel flywheel on his Buggies to keep the bottom end of the Drake Picco's in check, without the heavy flywheel the tires would spin like crazy when motor hits pipe..... But with the steel flywheel the motors acceleration is much smoother and linear ( albeit slower)..... So these days with the prevalence of very slippery tracks, and very light fine tread race tires engine manufacturers have decided to add heavy weighted cranks to tame down the power delivery of their engines..... The heavier cranks do take alot whallop out of the trigger feel of the engine, but it makes the motors more manageable on the loose tracks........ You will find that on high traction situations some of these weighted crank engines can feel like real duds in the low end

So OS Speed is really just a V-Spec with a weighted crank to make the power more manageable.... As the V-Specs are know to be rather hard hitting motors, so adding the weighted cranks makes them more useable in a buggy.... The Speed will definitely lose some of that typical V-Spec explosiveness though by having theweighted crank....

OK sure but is NEXT to nothing worth $200? I'd get 5 sets of tires instead.

Nice contradiction.

Not really. Less torque but higher rpm can still give more HP. I think he means it has got less max torque at lower rpms but more torque up on top thus making more max HP.

okay where did I contradict myself ? I maybe didn't word things properly, but by no means did I contradict myself....... The OS Speed has less punch, and less torque..... but it does make very slightly higher peak power.... but area under the curve belongs to the standard V-Spec.. as only at the peak does the Speed surpass the regular Spec........

You've done it again I'm afraid, Sman is closer to what Ithink your trying to say though...

"The power band has been smoothed out and shifted slightly further up the rev range and the max RPM has increased to compensate." Is how I would speak about the improvements.

It's the lower punch that makes this engine more user friendly and knowing that if you need more power, it's there and will be applied with a silk lined glove so as not to bite you in the ***** and throw the marshall into a mad panic as to which ankle he/she wishes to sacrifice.


But tbh the average clubman would never notice the difference in the engines.

is the port timing advanced or retarded from a stock V-Spec ?