I just brought O.S. max .21VZ-R Ver.II yesterday.
I read owner’s instruction manual book on page 11, ½ way of the page it say “Use the same fuel as is to be employed for all initial running and containing NOT LESS THAN 18% lubricant.”

Has anyone really used this high % of oil contained?
After I read all 2 pages of this thread, it could be save to use it.

Regards,

I was wondering what's the low end on this engine?
I currently run rally game races 1/8th asphalt with a lowered hyper 7 using a v-spec engine.
The thing is that at slow turns the v-spec has too much power and spins the rear out very easily.BUT i don't want to use an engine which is dead down low cause the car weights around 3.9Kg(8lbs 10oz) and with the taller gearing for on-road and no wheel spin...!
Does the v-zr ver.II has enough low end power for this application?

Good thread. I just picked up the last one from Ace. It's sitting in the box until I decide just what to do with it. :p

modded vz-r
 

hello
does anyone run modified vz-r engines?

i just wanted to know what the performance is like compared to stock.

thanks

What runtimes do you all get from this engine?
Is it as good as the v-spec on buggies(get's close to 9-10mins pair tank)?

i get close to 6.5mins on this engine, i also noticed i gained half a minute with the modified piston sleeve.

i dont think many on road .21s can run for 9 - 10 mins

this is a great engine just lacks a bit of top end but ill be working on that with my engine guy to gain more top speed

Only 6.5mins. Is this the best it can do?(on what track?)

I'm running on-road rally game races and with the v-spec i got around 8.30 on a short track though.
I suppose on a larger track with more WOT runs it would be around 7.30.

not sure where you are but i race at moorebank, sydney australia
its a large open track so your on full throttle most of the time.

6.5mins is plenty you really only want engines running 5.5mins for pit stops

I ran the piston, sleeve, and crank from a VZR2 with a V-Spec carb, head, and turbo button with a P3 plug. The block, con rod, end plate, and bearings are the same for both. I ran it off-road in an XB8. It worked out prettygood because our track last seaon was low traction so I didn't need all the torque of the V-Spec. The combo I put together extended the top end way more. My buggy would run away from anyother car, period, on our 140' straight. I always like massive torque off the bottom so my favorite pipe is the Jammin JP-1. I could get 7 min. on 125cc. with the blue restrictor.

The VZR2 piston, sleeve, and crank will fit right into your V-Spec.

Too bad, I blew it up. It was spinning the tires all the time down the straight I over-revved it too many times the rod snapped.

How would you compare the v-spec and vzr ver II consumption on the same track you race?
Have you run both on the same track?

I never ran a full VZR2 but with the above setup the fuel consumption was really close to the V-Spec. I never really timed it but I refilled at 7min same as when I ran the full on V-Spec. Like I said it changed the power output to more weighted on the top end. With this setup I never had issues clearing jumps or getting out of corners fast. I just had to give it a bit more pull on the left trigger. I pefer this setup over the stock V-Spec because I found the V-Spec lacking on the top end. Sure I got a good charge out of the corners but the Nova guys would catch me half way down the straight. However, When I ran this setup I pulled away from all of them. Give it a try.

If I do the same thing again this year. I'd get a VZR2 crank, piston/sleeve, TKO ceramic front and rear bearing and throw it my V-Spec. Try RC Champ out of japan for OS parts. When I was in Tokyo I got the crank for 4500 yen, Piston/sleeve for 7500 yen, and the rod for 1900 yen.

I have 4 V-Specs but my new favorite engine fo now is a Maxpower M8T but if it gives me too many tuning headaches the V-Spec is an engine change away.

You have a PM................Ron

This engine has no bottom end wat so ever! slow..

is this normal guys?

Why would you say that?
You are talking about your modified one?
Is it the ver 2?

[I have bought one two weeks ago and have gone almost 10tanks of fuel through it and i can't turn the flywheel without preheating the engine...]

I still have it way rich on both bottom and top needles and it has great power at least down low where i can drive it(haven't past the 20000-25000rpm mark yet).

Hey Jay

I think they state to use 18% oil so that the engine is safe.. Really 18% oil is way too high for an on road vehicle... 18% oil would be best suited for boats and planes ..