quadgod211 Posted October 10, 2008 Report Posted October 10, 2008 is anybody running these stock stroke cubs??? i ran a 4.23 on 300ft dirt 358 65x54 cub not ported on alky,,jeff said that with his port work i could get into the 4.0's and with spray maybe some 3.9's.... would it be worth the cash for all this or get what i can out off selling my cylinders and get the 4mill cub?? which at our track only runs 4.0's ported due to traction probs ????? money is tight so this is all the mods ill get to do this winter... Quote
RadarRacing Posted October 10, 2008 Report Posted October 10, 2008 I'd say have jeff port it. I just took my 54 stroke 392 apart and have my new 4mil almost together. It's a lot of money difference over just porting. My 392 was pretty fast but I just wanted a little more. Quote
kawiking Posted October 10, 2008 Report Posted October 10, 2008 id see how much u could get out of your set up right now. sounds like its runnin good. see how much closer u can get to 4.0 with ur set up . then port it. ask jeff how much of ur set up ud have to change with the port. whats carbs are u runnin now ? Quote
J-Madd Posted October 10, 2008 Report Posted October 10, 2008 Mine has some port work and has run 4.21 at its best. I'm trying to decide if I want to get more port work done to it as well. 190 lb rider, lightened stock chassis. 4.23 is a good time for that motor, imo. Quote
shanYE west Posted October 10, 2008 Report Posted October 10, 2008 is anybody running these stock stroke cubs???i ran a 4.23 on 300ft dirt 358 65x54 cub not ported on alky,,jeff said that with his port work i could get into the 4.0's and with spray maybe some 3.9's.... would it be worth the cash for all this or get what i can out off selling my cylinders and get the 4mill cub?? which at our track only runs 4.0's ported due to traction probs ????? money is tight so this is all the mods ill get to do this winter... Whats your chassis setup and rider weight? Quote
J-Madd Posted October 10, 2008 Report Posted October 10, 2008 Just noticed you have the 358 cub. My reply was referring to my 392 Cub, just for clarification. Quote
quadgod211 Posted October 11, 2008 Author Report Posted October 11, 2008 frame is +12 front with a struted +10 swingarm,prowedges,13/40 launch in 2nd,38/40 hv lectrons on alky,,im 200lb and setting as far back on it as possible..lol heres a small pic if it helps any..... Quote
shanYE west Posted October 11, 2008 Report Posted October 11, 2008 my best time out of my 421 is a 4.16 with no bar... If that thing is running that good.. I dont think I'd change a thing. For a motor that size.. thats flat out ripping. Quote
quadgod211 Posted October 11, 2008 Author Report Posted October 11, 2008 its a fast track as well,he only drags the 1st 100ft and it packs down hard at the big end....good dirt though,,prowedge is the only hooking tire..... now in the sand at grayson with 13 paddle extremes i can only turned mid 4.3's.. Quote
J-Madd Posted October 14, 2008 Report Posted October 14, 2008 My times are on a stock chassis, I assumed yours were as well. I think you can get more out of it than 4.20s on a ridgid. Ran my best ever time on my 421 (stock chassis) a week ago [email protected] mph, 1.45 60 ft. Its all about gearing and tires. I finally found the sweet spot with this motor, I think. Quote
RadarRacing Posted October 22, 2008 Report Posted October 22, 2008 I wouldnt get rid of it either. I know my new 421 runs, but if you have a 190 or 200 lb rider on a stock stroke cub running low 4s dont tear it apart by any means. Quote
dajogejr Posted October 22, 2008 Report Posted October 22, 2008 Word...don't touch a thing. Play with gearing, timing and air pressure....but you got a good running motor there! Quote
2bzy2p Posted October 23, 2008 Report Posted October 23, 2008 thats kinda odd going faster on dirt then sand and especially running a 4.2 with prowedges. must have a bad motor! Quote
quadgod211 Posted October 23, 2008 Author Report Posted October 23, 2008 its a fast track,,,anything over a 7 mill cub overpowers it on the big end,,,i mean a stock 450yfz's with wedges strutted with a wheelie bars can run 5.0-5.3's on the tracks you all run i normally turn around a 4.36-4.40's i got a buddy that runs a 10mill at planet sand he ran a 3.75 and at this track hes a 4.0 man cause of traction... Quote
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