kshoulde35 Posted June 17, 2013 Report Posted June 17, 2013 Who has some actual time slips to compare the two? not dyno sheets... with the cpi's liking more exhaust duration and reportedly having a front side curve what kind of et's are they laying down against the shearers who seem to be dyno queens. 1 Quote
So Cal Suspension Posted June 17, 2013 Report Posted June 17, 2013 If we can't get people to DYNO pipes side by side on identical motors, it's going to be impossible to get people to have two identical motors, run on the same day, at the same track, with the exact same chassis, tires, suspension, and rider. Quote
dajogejr Posted June 17, 2013 Report Posted June 17, 2013 No pipe dyno thread will ever get followed through...it can't be. Different pipes like different motor characteristics... We could take 20 motors, dyno them all side by side. Half might like one pipe, the other half might like another. Pipes are a very, very small part of an overall winning package. But they're the firestarter for pretty much any thread on here. Pipe A. vs. Pipe B, it's all you need for 100 pages of chest thumping, and about 80% of them have never been down a drag strip or organized race to where the last nth of HP is important. Quote
Nightmare Posted June 17, 2013 Report Posted June 17, 2013 I have a pic of two slips from last season comparing the 2. Their in my gallery under drag bike. The runs were about 20 minutes apart.<br /><br />Sent from my SGH-T679 using Tapatalk 2<br /><br /> Quote
kshoulde35 Posted June 17, 2013 Author Report Posted June 17, 2013 I have a pic of two slips from last season comparing the 2. Their in my gallery under drag bike. The runs were about 20 minutes apart.<br /><br />Sent from my SGH-T679 using Tapatalk 2<br /><br /> thanks for that info nightmare.. could you share more details on the overall setup... fuel, carbs, motor, port timings ? Quote
Nightmare Posted June 17, 2013 Report Posted June 17, 2013 Stock stroke/stock Cyl, 35mm pwk's, 91 pump gas, +4 timing, backyard port job lol, stock frame on struts +6 swinger, lockout/mmatv hd clutch. It put out 86 on the dyno at sea level but I'm at 5000ft now. I was also 245lbs when I made those runs and made NO jetting changes, pipe swap and go. I'll be comparing cpi and shearers along with another unknown name set of pipes this Friday. <br /><br />Sent from my SGH-T679 using Tapatalk 2<br /><br /> Quote
kshoulde35 Posted June 17, 2013 Author Report Posted June 17, 2013 Update us on the differences this run Quote
Nightmare Posted June 17, 2013 Report Posted June 17, 2013 Oh, as for the port timings, that's something that was kept between my motor guy and one of the pipe makers. <br /><br />Sent from my SGH-T679 using Tapatalk 2<br /><br /> Quote
Nightmare Posted June 17, 2013 Report Posted June 17, 2013 Update us on the differences this run Will do, I'll provide slips and jet changes. Sent from my SGH-T679 using Tapatalk 2 Quote
So Cal Suspension Posted June 17, 2013 Report Posted June 17, 2013 Oh, as for the port timings, that's something that was kept between my motor guy and one of the pipe makers. <br /><br />Sent from my SGH-T679 using Tapatalk 2<br /><br /> So, which pipe was the motor built for? 1 Quote
Nightmare Posted June 17, 2013 Report Posted June 17, 2013 I just called my motor guy and I'm just waiting for him to call me back but I want to say it was shearer. We're at a different track this year and its about 500ft higher than the old one, I'm sure that will have some affect?<br /><br />Sent from my SGH-T679 using Tapatalk 2<br /><br /> Quote
Nightmare Posted June 17, 2013 Report Posted June 17, 2013 Ok, it was shearer that he talked to but used 35mm carbs instead of using 33's like Mat suggested. With the changes he's making now (port timings and domes) it SHOULD run better with the shearers.<br /><br />Sent from my SGH-T679 using Tapatalk 2<br /><br /> Quote
n2otoofast4u Posted June 18, 2013 Report Posted June 18, 2013 Who has some actual time slips to compare the two? not dyno sheets... with the cpi's liking more exhaust duration and reportedly having a front side curve what kind of et's are they laying down against the shearers who seem to be dyno queens. FFS Quote
Nightmare Posted June 23, 2013 Report Posted June 23, 2013 Ok, I'll post the slips when I get home tonight but it was the cpi's all day long over the shearers. I know that all motors are different of course but this one likes the cpi's. So for the hell of it we compared them on a bike that's stock other than 28mm carbs and pods and it liked the cpi's also. So there:D<br /><br />Sent from my SGH-T679 using Tapatalk 2<br /><br /> Quote
So Cal Suspension Posted June 24, 2013 Report Posted June 24, 2013 Ok, I'll post the slips when I get home tonight but it was the cpi's all day long over the shearers. I know that all motors are different of course but this one likes the cpi's. So for the hell of it we compared them on a bike that's stock other than 28mm carbs and pods and it liked the cpi's also. So there:D<br /><br />Sent from my SGH-T679 using Tapatalk 2<br /><br /> Just a suggestion, but, um, if your builder built your motor specifically to run with shearers, and it runs better with CPI's, I'd say it's time to find a new motor builder. just saying 1 Quote
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