WINDYCITYJOHN400 Posted June 1, 2012 Report Share Posted June 1, 2012 You will keep more midrange with cpi over shearer Depends on the build. My motor made the same low end power with Shearers as it did with CPI's (My dyno overlays matched perfectly!)....but made 14 more HP and revved another 1000 RPM with the Shearers. So the belief that CPI's have more low end torque isn't always the case. He says he has a dune port and I see nothing but sand in his signature pics......So I'm going to say pipe it like it's a dune bike. What you pick for a dune pipe is your personal choice.....but for a bike with a dune port and all sand riding.....I'm going to say Shearers FTW. Quote Link to comment Share on other sites More sharing options...
possum Posted June 2, 2012 Author Report Share Posted June 2, 2012 (edited) Yea wcj400, nothin but sand here. Im gonna try the shearers on my dune bike sunday. I have a feeling im gonna love it. Edited June 2, 2012 by possum Quote Link to comment Share on other sites More sharing options...
BigRed350x Posted June 2, 2012 Report Share Posted June 2, 2012 Got any friends with CPI pipes you could borrow for a day and try out? If you have friends with either pipe borrow them and give each one a try... I have CPI, small bore shearer, and big-bore shearer that I swap around from time to time. I like each pipe for different stuff. - Jared Quote Link to comment Share on other sites More sharing options...
mouzon30 Posted June 2, 2012 Report Share Posted June 2, 2012 pc try them they work good for porting they hit just like the t5 and i have the hjr mx hardcore port timing is at +4 with 21cc domes and my bike hits hard Quote Link to comment Share on other sites More sharing options...
shanYE west Posted June 3, 2012 Report Share Posted June 3, 2012 CPI.. FTW Quote Link to comment Share on other sites More sharing options...
RadarRacing Posted June 3, 2012 Report Share Posted June 3, 2012 I love CPI inframes too. For dragging theres no replacement for shearers but for a dune bike or heavier rider the CPIs get close and they are more forgiving on shifts. Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted June 3, 2012 Report Share Posted June 3, 2012 Depends on the build. My motor made the same low end power with Shearers as it did with CPI's (My dyno overlays matched perfectly!)....but made 14 more HP and revved another 1000 RPM with the Shearers. So the belief that CPI's have more low end torque isn't always the case. I love CPI inframes too. For dragging theres no replacement for shearers but for a dune bike or heavier rider the CPIs get close and they are more forgiving on shifts. See above quote - That was for my dune bike.....I'm 200+ and was running a non-override tranny. I understand that you believe what your saying. I've also always admitted that different motors will like different pipes. But the statement the CPI's will work better for a heavier rider...or are more "forgiving" on shifts?..... That's just assigning a Character trait to a pipe that might not always be the case. I know it's a strong opinion, but it wasn't true based on the dyno and ride testing I did. I bought CPI's believing the same theory you just stated. Then had to buy another set of pipes when I found out it wasn't true. Your motor will know what pipe it likes best, and your builder should be able to advise you on what pipe will best meet your motors needs. I'm not saying that CPI's aren't good or that Shearers will always beat CPI's......but I am saying that the view that CPI's will work better for a heavier rider or be more forgiving on shifts is misleading, as testing has shown otherwise in many instances. Quote Link to comment Share on other sites More sharing options...
RC418 Posted June 4, 2012 Report Share Posted June 4, 2012 See above quote - That was for my dune bike.....I'm 200+ and was running a non-override tranny. I understand that you believe what your saying. I've also always admitted that different motors will like different pipes. But the statement the CPI's will work better for a heavier rider...or are more "forgiving" on shifts?..... That's just assigning a Character trait to a pipe that might not always be the case. I know it's a strong opinion, but it wasn't true based on the dyno and ride testing I did. I bought CPI's believing the same theory you just stated. Then had to buy another set of pipes when I found out it wasn't true. Your motor will know what pipe it likes best, and your builder should be able to advise you on what pipe will best meet your motors needs. I'm not saying that CPI's aren't good or that Shearers will always beat CPI's......but I am saying that the view that CPI's will work better for a heavier rider or be more forgiving on shifts is misleading, as testing has shown otherwise in many instances. I agree with your statements, just because a certain pipe works good on one setup doesnt mean its going to work the same on the next, there are way too many variables within an engine to say that a certain pipe is going to work better. My motor was built around the LRD pipes that I run, I'm tempted to try a different set of pipes but I'm not sure if my motor will like CPIS or Shearers or Snipers better than my current LRD's. Quote Link to comment Share on other sites More sharing options...
dirtydownunder Posted June 4, 2012 Report Share Posted June 4, 2012 i gained everywhere when switching from t5 to shearer and alot more top end, as the t5's brick wall at like 7k. Quote Link to comment Share on other sites More sharing options...
mike0chek Posted June 4, 2012 Report Share Posted June 4, 2012 i gained everywhere when switching from t5 to shearer and alot more top end, as the t5's brick wall at like 7k. i went from old t4's to shearers and noticed the same difference Quote Link to comment Share on other sites More sharing options...
toytech Posted June 5, 2012 Report Share Posted June 5, 2012 just run some DG pipes and feel the power!! Quote Link to comment Share on other sites More sharing options...
Hilarious Posted June 5, 2012 Report Share Posted June 5, 2012 you will gain either way with the cpi's or shearers from the t-5's. i would go cpi's not because they have "more midrange and bottom end" what i liked about them on my play bike is they come on sooner and were a bit easier to get back on the pipe if i let off the go button. and they flat out had more all over than the t-5's i had. Quote Link to comment Share on other sites More sharing options...
Strm Trpr Posted June 13, 2012 Report Share Posted June 13, 2012 Possum, Sunday the 3rd came and went. It's now the 13th. You have any feedback on the Shearers vs T5's? Quote Link to comment Share on other sites More sharing options...
The Prince Posted June 13, 2012 Report Share Posted June 13, 2012 i have a set of BB in frame shearer if anyone wonts them Quote Link to comment Share on other sites More sharing options...
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