aleyesonme Posted February 11, 2014 Report Posted February 11, 2014 Local track finally opened back up and and got to try a new sprocket ratio 2.05 in place of the 2.11 I first ran.....since I was running outta gear way before the finish line....anyway I was slower in every category, 60 ft, et, and mph....with the 2.11 ratio ran a 6.991, best I could get the 2.05 ratio was a 7.22......not sure what to do...I rather have the faster time but I also rather save my motor....I'm stumped, not really sure what to do at this point....maybe go back to the 2.11 ratio and get bigger tires maybe???? Any suggestion??... Yeah I went from a 18 38 to 18 37 cub on pump gas if that helps Sent from my LG-P769 using Tapatalk Quote
SlowerThanYou Posted February 12, 2014 Report Posted February 12, 2014 Local track finally opened back up and and got to try a new sprocket ratio 2.05 in place of the 2.11 I first ran.....since I was running outta gear way before the finish line....anyway I was slower in every category, 60 ft, et, and mph....with the 2.11 ratio ran a 6.991, best I could get the 2.05 ratio was a 7.22......not sure what to do...I rather have the faster time but I also rather save my motor....I'm stumped, not really sure what to do at this point....maybe go back to the 2.11 ratio and get bigger tires maybe???? Any suggestion??... Yeah I went from a 18 38 to 18 37 cub on pump gas if that helps Sent from my LG-P769 using Tapatalk Had to refresh my memory on what was going on. I recommended that 2.05 ratio. What I didn't get into was other changes you have to explore to make something work. Plain & simple we gear for the desired RPM we want to attain at the end of our run. For 1/4 mile our best ET came with a gearing able to achieve 10,800 RPM. We don't spin it as high for the 1/8 mile, but it's well over 10,000 RPM. Now, to be able to use the gearing we want. We depend a lot on our clutch set-up, but there are other areas that need to be addressed also. While I'm not saying the 2.05 is right for your combo, but I would ask some questions & try some stuff before giving up on it. 1st thing & IMO the most important! What was the rpm crossing the finish line & was it in the gear you wanted, 5th or 6th. Quote
aleyesonme Posted February 13, 2014 Author Report Posted February 13, 2014 First answer to your question is I have no idea...I don't have a tach so there's no way of me knowing that I know of....second answer is I was in 5th, have a 1-5 override .....I did have more gear to go if that's what u wanted to know Sent from my LG-P769 using Tapatalk Quote
J-Madd Posted February 13, 2014 Report Posted February 13, 2014 Use your mph, tire height and gearing calculator to get your approximate rpm. I'm not sure how much those tires grow, or if you need to add that in to the tire diameter. STY would likely know that. Quote
SlowerThanYou Posted February 13, 2014 Report Posted February 13, 2014 Use your mph, tire height and gearing calculator to get your approximate rpm. I'm not sure how much those tires grow, or if you need to add that in to the tire diameter. STY would likely know that. Thanks, I forgot about that route! Quote
SlowerThanYou Posted February 13, 2014 Report Posted February 13, 2014 We used to use Gearing Commander, but I haven't been able to get it to work lately. IMO, the best RPM calculators are the motorcycle type. We type in the actual information & adjust the tire diameter to match our MPH. On our tires it's usually around 1" or 1 1/2" tire growth. Quote
cce12 Posted February 13, 2014 Report Posted February 13, 2014 This is what i use. http://www.everything2stroke.com/content/40-Gearing-Calculator-Banshee Quote
sleeper06 Posted February 14, 2014 Report Posted February 14, 2014 the biggest problem I found with asphault is being consistant, launch limter, clutch tune will get you consistant . Just by holding the throttle you will never leave the same way twice and if your feathering the clutch you just brought in more variables, I use a tach off a go cart works well and is easily removable if street racing, I have never ran 1/8 but I can easily get through all 6 , imo a 6 speed is a must on pavement Quote
aleyesonme Posted February 14, 2014 Author Report Posted February 14, 2014 Yeah I agree that having 6th is a must or plus....therefore I wouldn't have had to change my gearing ratio....so my thing is why is it that you see most people run a 1-5 rather than 1-6 override....I would think that having a 6th gear just in case u need it....better to have And not need than to need and not have. Sent from my LG-P769 using Tapatalk Quote
sleeper06 Posted February 14, 2014 Report Posted February 14, 2014 Its the most popular set up for sure, it seems a full 1-6 overide is very unreliable and most tranny guys have a hard time getting them to stay together or just plain out wont cut em . I use 1-4 m5th,6th with a shift kil 1 Quote
aleyesonme Posted February 14, 2014 Author Report Posted February 14, 2014 Its the most popular set up for sure, it seems a full 1-6 overide is very unreliable and most tranny guys have a hard time getting them to stay together or just plain out wont cut em . I use 1-4 m5th,6th with a shift kil Oh ok now I see why they are not popular. ...thanks....either I need to figure out my clutch or go back to a 2.11 with bigger tires Its the most popular set up for sure, it seems a full 1-6 overide is very unreliable and most tranny guys have a hard time getting them to stay together or just plain out wont cut em . I use 1-4 m5th,6th with a shift kil Sent from my LG-P769 using Tapatalk Quote
SlowerThanYou Posted February 15, 2014 Report Posted February 15, 2014 I have never ran 1/8 but I can easily get through all 6 , imo a 6 speed is a must on pavement We have found a 6 speed is a must for the quickest ETs for 1/4 mile. We started with a 5 speed for 1/4 & was pretty fast. It just took a lot more work. Yeah I agree that having 6th is a must or plus....therefore I wouldn't have had to change my gearing ratio....so my thing is why is it that you see most people run a 1-5 rather than 1-6 override....I would think that having a 6th gear just in case u need it....better to have And not need than to need and not have. Sent from my LG-P769 using Tapatalk While we have a 6 speed, our quickest 1/8 mile times come only using 5th gear. Its the most popular set up for sure, it seems a full 1-6 overide is very unreliable and most tranny guys have a hard time getting them to stay together or just plain out wont cut em . I use 1-4 m5th,6th with a shift kil X2 on the full 1-6 override, but it's the fastest! X2 on the 1-4 manual 5/6 with shift kill. It works very well & is reliable. Oh ok now I see why they are not popular. ...thanks....either I need to figure out my clutch or go back to a 2.11 with bigger tires Sent from my LG-P769 using Tapatalk IMO, figure out your finish line RPM 1st. Most people will gear to hit their peak hp rpm at the finish line. Then work on the other areas suggested to get it to ET. Quote
aleyesonme Posted February 15, 2014 Author Report Posted February 15, 2014 Ok thank you. ...I'll see what I can do this Sunday. ..I'll prolly wet the tires and try to dump the clutch Sent from my LG-P769 using Tapatalk Quote
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