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My dealer was offering free dyno runs the other day, so I thought I'd get mine checked.
I have the 447 cam, Street Tuner, Heavy Breather, stock head pipe, V&H Eliminator 400 slip ons.
The one thing I wasn't able to do before the run was fresh gas. It seems to still be winter here, so the gas is from October. May have cost me a bit, but I wouldn't think much.
I was expecting my torque to be in that 108# range, and it is. I was expecting my HP to be about 95, it's a bit lower at 90, but I don't really care about that.
What I did find concerning was my low end torque. In the 2500-3000 RPM range.
I was expecting about 10# more. Maybe it is what it is, but I am wondering if the 2 1/2" baffles in the 400s are killing that low end?
I am considering a switch to Street Cannons if they will pick that up, but I sure don't want to spend the $ if not.
No, I was actually pretty happy generally with the new cam. I did think it felt weaker than I expected in my normal cruise range, just under 3K. But I thought that was due to being stuck with the Street Tuner. Now Im questioning my choice of slip on.
Chasing torque and hp is a tricky thing to do. My advice..a few hp or tq numbers are neglible in the seat of the pants dyno. Run the mufflers you like the sound and look of, and forget the dyno sheets.
If you really want to improve the numbers...change the camshaft and tuner to an aftermarket.
Yeah I know. Of course I'm still holding my warranty for another year, then I'll choose another cam and tuner.
A few pounds I wouldn't worry about, but if I'm leaving 10# on the table in my riding range for the sake of the cost of slip ons?
But then think of all the money you "wasted" for a few, or even 10# tq, just to go upgrade to aftermarket parts after your warranty expires. I mean I guess some ppl have money to waste and it doesn't bother them. I'm not one of those. lol
Remember those dyno numbers are at the rear wheel, other measures are at the crank.
I think the Street Tuner is your bottleneck. After your warranty you could try a different tuner.
But then think of all the money you "wasted" for a few, or even 10# tq, just to go upgrade to aftermarket parts after your warranty expires. I mean I guess some ppl have money to waste and it doesn't bother them. I'm not one of those. lol
So I sell my used slip ons and spend, say $300 difference (Canadian $) to change to Street Cannons.
If someone said to you, here, buy this part for $300 and you can gain a solid 10# of torque in the 2500-3000 RPM range, who wouldn't buy it?
That is, IF, the slip ons are holding me back. If it's the tuner, oh well.
OP - Canada is not restricted by the consent decree as far as I know. Put a real tuner on and see if that wakes it up. If not, change the header and cam
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Torque, baffle size, dyno
