Joejr915 Posted December 15, 2012 Report Share Posted December 15, 2012 Which one runs better? Or produce more power? Quote Link to comment Share on other sites More sharing options...
BigRed350x Posted December 15, 2012 Report Share Posted December 15, 2012 Which is better, ford or chevy? Quote Link to comment Share on other sites More sharing options...
Nightmare Posted December 15, 2012 Report Share Posted December 15, 2012 Small block or big block, inframe or outframe? It's all on how it's built bud. Sent from my SGH-T679 using Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
Finch Posted December 15, 2012 Report Share Posted December 15, 2012 421 Cheetah Cub.. Quote Link to comment Share on other sites More sharing options...
springer Posted December 15, 2012 Report Share Posted December 15, 2012 cheetah with powervalves FTW!!!!! Quote Link to comment Share on other sites More sharing options...
Joejr915 Posted December 15, 2012 Author Report Share Posted December 15, 2012 I have a 421 cub and was curious if a 421 cheetah would b better for 500ft drags Quote Link to comment Share on other sites More sharing options...
special06shee Posted December 15, 2012 Report Share Posted December 15, 2012 10cub ftw Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted December 16, 2012 Report Share Posted December 16, 2012 cheetah with powervalves FTW!!!!! CUB without powervalve FTW at 1/2 the cost and with cheaper piston for lower long term costs. Not to mention common reeds, domes, etc. Plus more power per cc...... Quote Link to comment Share on other sites More sharing options...
CFH87 Posted December 16, 2012 Report Share Posted December 16, 2012 All in set up if you've got money and time cheetah, if not a cub can run just as well for less. Quote Link to comment Share on other sites More sharing options...
CFH87 Posted December 16, 2012 Report Share Posted December 16, 2012 And I'd go for a bigger cheetah motor too like 485 and up. Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted December 16, 2012 Report Share Posted December 16, 2012 And I'd go for a bigger cheetah motor too like 485 and up. Had one. Fully done 492 to be exact. My new 465 cub makes more power for less effort and less money. But the question was about 421's, so why push a cheetah....you might as well say DM. Since neither is the motor he asked about...... Quote Link to comment Share on other sites More sharing options...
CFH87 Posted December 16, 2012 Report Share Posted December 16, 2012 jmo... Quote Link to comment Share on other sites More sharing options...
vulvafan537240 Posted December 16, 2012 Report Share Posted December 16, 2012 http://www.planetsand.com/forums/ubbthreads.php/topics/1109312/2 Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted December 16, 2012 Report Share Posted December 16, 2012 These tests were made on a 73mm bore X 58mm stroke Cheetah. We then repeated the same comparisons on a 10mill stroke kit, (73mm bore X 64mm stroke), where we found the larger TRX250R reeds which we used on the Cheetah to be superior to the smaller Banshee sized reeds.....we found the performance of the Banshee sized reed seemed to be limited at around 120hp, when the engine performance was above that number we found the 250R sized reed to be superior, even with the "limiting factor" of that reed being offset to the center-line of the bridge and bore. Well, right from Calvin's own words.......^^^^^^ (As volfan537240 so kindly quoted) As I have said MANY time over the years...."!0 mill Cheetahs (535's) can be real runners, but 4 mill and smaller ( 400-421-472-480-485-492) cheetahs are junk performance wise for their cc's" CAMATV is well known for having a few strong running P.V. motors, but I think his true skill is in the overall bike set-up. I have yet to see a truly strong running 4 mill cheetah put down a respectable dyno number compared to a similar sized cub. The strongest running 4 mill cheetah I've ever seen posted on ANY site, was Mailman's 492. On gas with OOF pipes he pulled a 105. (He had 3 different builders port that motor over the years, many different sets of domes and had over 200+ dyno passes to get it to that point!) Now I'm sure you can find dyno runs listed often of much smaller cubs in the 421 to 465 range touching numbers in that range and with less cc's. Nickisgod had FAST build his 485 Cheetah and it maxed out a 95HP and didn't make ANY lower torque numbers than my smaller 465 cub even though he had the powervlaves. (Same dyno, same day) The OP asked which would be better for 500ft drags, a 421 cub or a 421 cheetah...............the answer is NOT the power valved motor. Hey, don't take my word for it.......believe the guy who designed and sells the cylinders. Quote Link to comment Share on other sites More sharing options...
springer Posted December 16, 2012 Report Share Posted December 16, 2012 Well, right from Calvin's own words.......^^^^^^ (As volfan537240 so kindly quoted) As I have said MANY time over the years...."!0 mill Cheetahs (535's) can be real runners, but 4 mill and smaller ( 400-421-472-480-485-492) cheetahs are junk performance wise for their cc's" CAMATV is well known for having a few strong running P.V. motors, but I think his true skill is in the overall bike set-up. I have yet to see a truly strong running 4 mill cheetah put down a respectable dyno number compared to a similar sized cub. The strongest running 4 mill cheetah I've ever seen posted on ANY site, was Mailman's 492. On gas with OOF pipes he pulled a 105. (He had 3 different builders port that motor over the years, many different sets of domes and had over 200+ dyno passes to get it to that point!) Now I'm sure you can find dyno runs listed often of much smaller cubs in the 421 to 465 range touching numbers in that range and with less cc's. Nickisgod had FAST build his 485 Cheetah and it maxed out a 95HP and didn't make ANY lower torque numbers than my smaller 465 cub even though he had the powervlaves. (Same dyno, same day) i have 0 time on a dyno to extensively tune my bike and several people on here can probably speak to how good it runs... 392 btw. and camatv was the one that built it and to say his "true skill" is overall bike setup is funny because all he did was my motor; granted, he did my WHOLE motor because it was a basket case from trinity, maybe that is part of it too. i built/setup my own chassis, which i think works well, but i would give my bike credit due to the motor more than chassis setup . you have a grudge against pv motors because yours never ran while i am biased to them because mine runs amazing, so really, maybe both of our opinions should be taken with a grain of salt. i understand your point of view and can relate to your frustrations with cheetahs, but they can be built to run right. sure, they aren't for everyone, but it is funny how you discourage EVERYONE from them. you seem to have a boner about dyno's and i don't have much to say about them because i have never used a dyno with this motor, but i will say i would put my 392 cheetah up against any 421 cub out there (in the sand, not the dyno). not saying its faster than all, but it will run with many bigger bikes out there... Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.