Heres what I need. I need you to explain why rev-boxes DON'T effect your engine life, then I'll come back with a well-supported explanation of why they do. By the way, I'm 17 and NOT AN IDIOT. I've rebuilt a 80cc dirtbike engine, a 307 olds' block, a 1976 Honda Goldwing GL1000 piece-of-poop bike from top to bottom (that was a mistake) and lots and lots of lawn equipment engines. During school, I'm the transmission engineer for our robotics team, (www.first1444.com ...not too healthy at the moment) and am currently developing an automatic two-speed transmission for an independant study course. Also, I am aware that you know more than me. However, I find it difficult to believe that you can tell how much your rev box effects engine life when you're shooting "25 HP" worth of NOS into your engine.

 

Most rev boxes on the market advance timing by 2-3 sometimes 5 degrees. All that does in move up the ignition timing. Sometimes, not always, a change in rev limit is also moved up by 500 RPMs or 1000 RPMS. Other boxes have selectable timing curves and rev limits - these even incorporate a stock curve. Your comment was that a person shouldn't get a rev box because it would decrease engine life. What Im saying, is that's insigificant..... Certainly insigificant when posting on a thread thats asking about aftermarket parts and how to make an EX go faster. Thats what I call silly.

Since you think you know about nitrous, let me ask you a question .... Is nitrous flamable? Tic Toc ...

 

Too late! No cheating by looking it up either ... LOL

 

Fine you win the time game. I am aware that you know more than me! I'm just making a point. I'm not opposed to re-timing, and nitro ISN"T flammable alone. It simply contians more oxygen than a normal "charge" of regualr air-if you've ever used a oxy-acetylene torch, you know how oxygen effects a flame. I've screwed with nitro on a smaller scale. (Ever heard of nitromethane powered R/C cars? they sell NO2 boost kits for those, which is cool. ...yes I know Nitromethane isn't NOS, or even similar) The rev boxes they were referring to (I belive) put the focus on advancing the redline, and they made no mention of timing adjustment AT ALL. I would have had a totally different set of words in response to that.

 

Thats because my nitrous experiance comes from working with 3 different types nitrous system in the last 2 years. My motor building experience comes from working on high performance ATV engines since the year 2000. I have installed over 20 nitrous systems on various ATVs and tuned each one. I have been in the industry as a professional since 2002. One of the shops I used to own, and sold about 8 months ago, is one of the largest advertisers here on this forum. A Nitrous company I worked for, in which I designed a regulated nitrous system for (of which there are two patents) used to also advertise here. I was a sponsor for 4 Stroke Wars in Glamis California for 2 years. When I was in the business, I sold over $400,000 worth of aftermarket parts, and designed exhaust systems, high flow water pumps and other performance parts. I am 42 years old and I have been involved in motorsports performance since I was 12, I did my first big bore when I was 13.

 

They made no mention of brands either, in which case I would have looked up what they modified, and possibly held my tongue. The closest anyone came to even mentioning timing (besides you) was the guy who said "better spark" One could think of that the same way as an IKat-which gives you "better spark".

 

I think you've got me beat by a little bit.

 

We can clear this up... Does letting your engine turn over more times in a minute make it wear out faster. Circle YES or NO.

 

Cool, thanks for the post. I dont want anybody to be reading this and get NITRO mixed up with NITROUS. Nitro is slang for Nitro-Methane, a race fuel. Nitrous (AKA - NOS or NOSS), is short for nitrous oxcide. NOS is not flamible because it is made up of two oxygen molecules bonded to one nitrogen molocule. In the bonded state, the oxygen is not available to burn until they separate from the nitrogen molecule. That happens at 450 degrees F in a combustion chamber. Then, and only then is it available to burn as concentrated oxygen with fuel. If you point nitrous to a fire, it will simply blow on it, and the nitrous will not burn. However, if you add pure oxygen to a fire in the same way .... RUN! LOL. So your analogy is incorrect - they are in fact quite different.

As far as rev boxes go, most will advance the timing and move the rev limit up. Most only move it up 500 RPM to 1000 RPM. Not a problem at all for the EX. However, more than that, say 2000 RPM, that would be a different story. The reason why manufacturers dont put large high performance engines with high horsepower is because of the liability issue. Thats why you'll probably not see a 1100 engine in a quad, but you will in a motorcycle.

 

It's seriously a liability issue? Didn't know. I figured they are already screwed as far as lawsuits go, so whats another 1000. thought it was 100% engine life, and if a certian block in question could handle it over long-term, they'd throw it on.