Engine Mechanical Topics Discussion for motor builds, cams, head work, stripped bolts and other engine related issues. The good and the bad. If it goes round and around or up and down, post it here.
View Poll Results: Which would you choose
Akrapovic (Dip but higher HP)
1
10.00%
D&D (No Dip lower HP)
9
90.00%
Voters: 10. You may not vote on this poll

Which Dyno Chart? Want opinions please

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Old Apr 1, 2016 | 07:44 PM
  #31  
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Originally Posted by 98hotrodfatboy
I kinda have to agree a little with that guy. no knocks dave... BUT if you do like to ride in the higher rpm range the Akro is a better choice hits hard at 3500 and carries out farther...

Let me refresh the post.
Better mileage ....no.
Maintaining speed easier...no.
Eliminating tq dip w compression....no.

These were the points from left field. Over 3500 rpm sure it's slightly better but not enough to ignore that HUGE dip.
 

Last edited by ntraindavefl; Apr 1, 2016 at 07:47 PM.
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Old Apr 1, 2016 | 10:06 PM
  #32  
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Originally Posted by ntraindavefl
Let me refresh the post.
Better mileage ....no.
Maintaining speed easier...no.
Eliminating tq dip w compression....no.

These were the points from left field. Over 3500 rpm sure it's slightly better but not enough to ignore that HUGE dip.
True statements the bike the akra exhaust went on is running 10.6 compression and still has the dip in the low end tq. I actually can say I don't feel the possible 9hp loss and the tq is where is like it. Future plan is head work and compression bump so she will be better off with the d&d. I am also going to assume being the first dyno time on the akra was middle of the winter with very cold dense air being brought in vs mild more damp air. So like we said in previous posts it's probably not a true 10hp loss.
 
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Old Apr 2, 2016 | 05:28 AM
  #33  
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Originally Posted by ntraindavefl
Let me refresh the post.
Better mileage ....no.
Maintaining speed easier...no.
Eliminating tq dip w compression....no.

These were the points from left field. Over 3500 rpm sure it's slightly better but not enough to ignore that HUGE dip.
Don't disagree at all dave, That's why I said I kinda agree a little "to the point of riding style and rpm range fit"...
 
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