banshee332 Posted February 17, 2008 Report Posted February 17, 2008 Just got off the phone with Jim from passion racing. Some of you guys might of known That he has been working on building his own drag pipes. He just got of the dyno about an hour ago. He tested His pipes and the shearer small bores oof's. On a 421 cub on gas with shearers he pulled 101 hp and then he tested his pipes They pulled 105 hp. He tuned the motor in with both sets of pipes. Jim also said That his pipes pull peak hp 400 rpms lower then the shearers. Just letting you guys know. Quote
dajogejr Posted February 17, 2008 Report Posted February 17, 2008 Got any pics? You know...it would be nice if Jim threw up some site sponsor money as others have. It's safe to say he's made a buck or two off members here, and he builds a fine motor I"m sure. It would be nice to see him give back a little... I think site sponsorship is like 800 a year, that's a couple port jobs.... Quote
banshee332 Posted February 17, 2008 Author Report Posted February 17, 2008 Im sure he would dave. I will ask him about it. I will see if I can get some pics. Quote
bansheefreak Posted February 17, 2008 Report Posted February 17, 2008 (edited) pretty sure he is a sponser.. if he wasnt wouldnt brads signature be gone??i know jim was a sponser maybe it ran out cus he got busy grinding instead of typing..lol if anything he might need to renew it.. Edited February 17, 2008 by bansheefreak Quote
dajogejr Posted February 17, 2008 Report Posted February 17, 2008 Nope...not saying he never was. But if he needs to renew, great...just never see a banner for him. Sorry guys, back on topic, promise. Are these coned pipes or stamped, does he plan on making big bore application as well? This could very well turn into a "my pipe is better because" thread, I hope not. I'm going to assume he ran these on a 4 mil ported by him, I'd like to see comparison runs on other motors, like a cleaned up cub, stock cylinder, etc. Of course, a price everyone can afford...too....LOL. There was supposed to be another pipe builder that never did materialize, all these choices might seem like a pain in the ass because there's going to be a lot. However, my take is the more options...the better. Good Job Jim.... Quote
banshee332 Posted February 17, 2008 Author Report Posted February 17, 2008 Right now they are coned pipes. The production is going to be stamped Quote
shanYE west Posted February 17, 2008 Report Posted February 17, 2008 I dont think he'll be making a big bore pipe anytime soon. I'm pretty sure he's focusing on the 421 cub and squeezing what ever he can from that one motor. I would think that a pipe designed for the 421 cub would see similar gains on all 421 cubs reguardless of porting because they all start with the same port layout and arn't changed very drasticly compared to the stock cylinders. But.. then again I'm not a pipe desinger or a builder.... sooo.. This is my hypotheical opinion. :shrug: Quote
dajogejr Posted February 17, 2008 Report Posted February 17, 2008 Very possible, but I think he knows he'd be cutting himself short not to look ahead with all the BIG motors coming out, DMs, Cougars, etc... That's where the money is... I know there's still power to be made on the 4 mil cub, and it is still a VERY popular motor...IMO the best bang for the buck...but, a lot of new stuff on the horizon as well! Quote
shanYE west Posted February 17, 2008 Report Posted February 17, 2008 (edited) True.. But, I would think a pipe deisigned for one motor (bore and stroke) would be the best performing pipe for that motor. The 421 will probably be the most popular motor for a while and would offer the biggest market for a motor specific pipe. When you start getting into the big bores your in a much wider range of motor configurations (bore and stroke) The R&D on designing those pipes would be very long and extensive not to mention you'd have to make the pipe perfrom ona wider range of motors. I think Jim is on the right track here. Probably once the 421 cub market falls through he'll move on to the next biggest bang for the buck and focus on that. Most people can't justify spending 3k on a motor for a quad.. And then there's us.. :biggrin: But a stamped inframe for the cub might be a good idea to go with the drag pipe. I just like to see more options then shearer and CPI. Edited February 17, 2008 by Fouledout421 Quote
dajogejr Posted February 17, 2008 Report Posted February 17, 2008 True.. But, I would think a pipe deisigned for one motor (bore and stroke) would be the best performing pipe for that motor. The 421 will probably be the most popular motor for a while and would offer the biggest market for a motor specific pipe. When you start getting into the big bores your in a much wider range of motor configurations (bore and stroke) The R&D on designing those pipes would be very long and extensive not to mention you'd have to make the pipe perfrom ona wider range of motors. I think Jim is on the right track here. Probably once the 421 cub market falls through he'll move on to the next biggest bang for the buck and focus on that. Most people can't justify spending 3k on a motor for a quad.. And then there's us.. :biggrin: But a stamped inframe for the cub might be a good idea to go with the drag pipe. I just like to see more options then shearer and CPI. Ok...Ok...fair enough...LOL. There are days I still wish I had my 421.... My point is the bigger stage is with the bigger motors...that's all. I agree...then it's a lot more to encompass rather than specialize in one build, one pipe...and getting the absolute most out of it...!! Quote
shanYE west Posted February 17, 2008 Report Posted February 17, 2008 Ok...Ok...fair enough...LOL. There are days I still wish I had my 421.... My point is the bigger stage is with the bigger motors...that's all. I agree...then it's a lot more to encompass rather than specialize in one build, one pipe...and getting the absolute most out of it...!! Yeah.. I agree with ya. There are days when I wish I had a 10mil though!... I have a feeling I'll be seeing alot of those days next year when everyone is running 3's except me! Oh well.. i guess I'll know how big I have to go by the end of season!! lol Quote
banshee332 Posted February 18, 2008 Author Report Posted February 18, 2008 Jim dident design this drag pipes just for the 421 cub. He designed it for an all around drag pipe. Quote
dajogejr Posted February 18, 2008 Report Posted February 18, 2008 That's good to know, Brad... If you get a chance to test it on your 10 mil, let us know.... Quote
camatv Posted February 20, 2008 Report Posted February 20, 2008 the last 421 cub that i built made 105hp on a stingy dyno with shearer inframe big bore pipes.. i am sure that the peak with the current pipe designs are just about seen.. there may be a movement of rpms here and there. one or 2 hp here and there but t he shearer big bore pipes are hard to beat and very easy to get. if i was drag racing and needed every little bit then i would be a little more concerened. i have heard of ti frames pulling one tenth more than a stock shaved frame.. but it was that 7500 bucks that put the bike ahead. Quote
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