R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro Off-Road

Reply
 
Thread Tools Search this Thread
Old 02-27-2009, 01:21 PM   #16
Tech Fanatic
 
SteveP's Avatar
 
Join Date: Mar 2002
Location: So Cal
Posts: 918
Default

Quote:
Originally Posted by jatoman1992 View Post
does anyone know i heard that there was a .21 motor that has a 48000 rpm limit
I guess it would be best to know why you're asking. The RPM ratings on most engines are very unrealistic estimates that could virtually never happen in actual use. The highest RPM I've ever seen is from a .21 on-road Sirio engine on a LONG straightaway, which was just a tick over 50,000 rpm measured by an audible tachometer. It measures the "frequency" of the exhaust and can be an accurate measure of engine RPM when properly used. If you've ever heard an engine run at that kind of RPM, you'd know how rediculous these kind of claims are when referring to off-road engines - they never get even close. Most high-performance off-road engines peak at roughy 35K, MAYBE up to 40K. If you're asking out of curiousity, then that's roughly the limit; if you're asking because you want to buy the fastest engine, pay no attention to claimed RPM.
SteveP is offline   Reply With Quote
Old 02-27-2009, 03:26 PM   #17
Tech Addict
 
Join Date: Sep 2005
Location: Southern CA
Posts: 743
Default

I've had multiple OS speeds and RB C6BBT7's, and I can say with 100% confidence the RB makes more raw power and has a higher RPM than the speed. Those RBC6 engines are ridiculous on the top end. However the Speed is a better offroad race engine because it has a better power band.
CarCrazy is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Engine empty revving Michael_90 Rookie Zone 2 11-21-2006 08:17 PM
Highest RPM engine for Savage sharkonwheels Monster Trucks 21 06-03-2006 12:38 AM
Engine Revving Flatout on startup dfwcomputer Electric Off-Road 2 01-23-2006 01:08 AM
Looking for a Big Block .15 RB Engine smartlp@cox.net R/C Items: Wanted to Buy 1 06-25-2004 01:21 PM
P5 Engine Block TonyWest R/C Items: Wanted to Buy 1 06-22-2004 02:32 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 02:23 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net