os vspec
ok, i have an os vspec, long story short
conrod blew after 3/4th of a gallon,os replaced the conrod but not the piston and sleeve that was damaged, SOOOOO i was able to pick up the speed piston and sleeve for cost and im picking that up friday. but i wanna know whats the BEST break in procedure. i did the heat cycle, but i think i did it wrong i do plan on gettin a speed conrod AFTER breakn so this doesnt happen again |
Originally Posted by losi_racer
(Post 5482400)
ok, i have an os vspec, long story short
conrod blew after 3/4th of a gallon,os replaced the conrod but not the piston and sleeve that was damaged, SOOOOO i was able to pick up the speed piston and sleeve for cost and im picking that up friday. but i wanna know whats the BEST break in procedure. i did the heat cycle, but i think i did it wrong i do plan on gettin a speed conrod AFTER breakn so this doesnt happen again |
you will need to stick with the stock rod, the lubrication points are different between the speed and the stock vspec, you can use the speed piston and sleeve, but need to stick with the stock rod
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Originally Posted by cjm1126
(Post 5483144)
you will need to stick with the stock rod, the lubrication points are different between the speed and the stock vspec, you can use the speed piston and sleeve, but need to stick with the stock rod
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ive got 8 gallons on my 21 vzb love it
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Originally Posted by ezveedub
(Post 5483159)
+1, the Speed rod and crank have lubrication points designed together. If you want to use a Speed rod in the VSpec, then use the JX21 or Speed crank also. Piston & sleeve can interchange between all there engines though.
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yes
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Originally Posted by JAMMINKRAZY
(Post 5483502)
Sorry, but this is not the case at all. Speed rod's work just fine with the stock v-spec crank. All the speed rod does is add a second lubrication hole, thus it will get even more lubrication. You can NOT use a speed or JX crank with the stock v-spec rod. But the other way around works just fine.
but can anyone answer my original question |
Here you go, right from OS website:
http://www.os-engines.co.jp/english/...r/carindex.htm Has everything you need to know about the vspec engine. |
Originally Posted by losi_racer
(Post 5484203)
yea i knew that,
but can anyone answer my original question |
I always install the engine fire it up and throw the car down and tune it to get to 200F as quickly as possible. I'll run the rest of the tank out driving back and forth down the street and back 100-150 feet or so at a time using only short bursts of throttle. Before the tank runs empty I shut the engine off and make sure the piston is not at TDC and let it cool. Once its cooled for a few minutes I run another tank like the first. Then I take them to the track and give them a conservative race tune and run them. Usually by the mains I am ready to go full race tune.
Disclaimer: This is how I do it and even though it works for me it may not be the best way. I just dont feel like wasting my time or fuel idling tanks or using a break-in bench. I am known for having limited patience and running up and down the street bores the crap out of me so I am always in a hurry to get things on the track and up to full speed. I have broken in many engines this way and typically get more life from them than I want as something new and better is always coming.:D |
losi_racer, try this link it might help, and don't push your engine too much after breaking it in, it take some time to get its racing performance , Take it easy on your throttle finger, power and performance of the mill will pop out naturally as soon as it gets some pinch loosen up.
http://rcspecial.com/news/?p=16205#more-16205 |
thanks guys, i think i have a good idea now
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I totally agree with PTP's breakin method, only difference being I run it at variable throttle for 3/4 tanks. Many engine builders and tuners have told me that the purpose of breakin is to take the engine through numerous heat cycles, and since you don't race at idle why run it like that for soo long? Use short bursts and vary the speed throughout the process, and after a couple tanks give it full throttle a couple of times. You don't have to baby it to break it in properly, just don't abuse it! My 2 cents worth...
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