Another day at the Dyno
#1
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Made a special trip to the dyno on Sunday - the car owner wanted to see the final testing and Sunday was his only free day. He flew up from NYC and I think he found the trip worth it!
Here is a pic of the car on the dyno (paint was so nice we wrapped the car to make sure it didn't get any scratches) and dyno charts for 12psi and 20psi.
I think I am most impressed by the 12 psi run.
Details - 3.1 liter MID Sleeve, Wossner pistons, Electromotive TecGT engine management (full sequential), SFR intake and headers, Tial/GTX35 turbo, Vitesse cam and a bunch of other goodies.
Dyno chats are wheel hp/tq.
Here is a pic of the car on the dyno (paint was so nice we wrapped the car to make sure it didn't get any scratches) and dyno charts for 12psi and 20psi.
I think I am most impressed by the 12 psi run.
Details - 3.1 liter MID Sleeve, Wossner pistons, Electromotive TecGT engine management (full sequential), SFR intake and headers, Tial/GTX35 turbo, Vitesse cam and a bunch of other goodies.
Dyno chats are wheel hp/tq.
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I got an email this morning from the owner - seems a Viper challenged him on his drive back to NYC....bye bye Viper!
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I'm curious, because the torque peaks and then tapers off for the 12psi, but it stays nice and flat for the 20psi run, does that mean that there's some internal flow limitation - like exhaust headers or intake manifold or head, that's restricting the flow of air? But that limitation is overcome by the higher boost pressure?
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I'm curious, because the torque peaks and then tapers off for the 12psi, but it stays nice and flat for the 20psi run, does that mean that there's some internal flow limitation - like exhaust headers or intake manifold or head, that's restricting the flow of air? But that limitation is overcome by the higher boost pressure?
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#9
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Nice results. Looks like the rpm limit could be set a bit higher? What fuel?
The 12 psi run peaks at 14 psi during the torque peak.
I'm curious, because the torque peaks and then tapers off for the 12psi, but it stays nice and flat for the 20psi run, does that mean that there's some internal flow limitation - like exhaust headers or intake manifold or head, that's restricting the flow of air? But that limitation is overcome by the higher boost pressure?
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I'm curious, because the torque peaks and then tapers off for the 12psi, but it stays nice and flat for the 20psi run, does that mean that there's some internal flow limitation - like exhaust headers or intake manifold or head, that's restricting the flow of air? But that limitation is overcome by the higher boost pressure?
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If you look at the 20 psi boost curve you will see that it was already making 3psi of boost at 3krpm and 7psi by 3.5k.
and good job see the reason for the 'extra' torque on the 12psi run, obviously you know how to read a dyno graph!
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Of course I like 16v set ups but its a different tool for a different job.....and it costs a lot more! When you do the math with a fixed price build it usually makes more sense to build an 8v with better parts / more head work than you can get with a 16v build for the same cost.
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Looks like a really good street motor with the occasional track day in mind.
In your summation of the differences between the 8v and 16v, does that imply that this head is highly worked?
In your summation of the differences between the 8v and 16v, does that imply that this head is highly worked?
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Yep, reshaped LARGE ports with bigger valves. The ports are now large enough that velocity at idle is pretty damn slow!
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Great work Chris!
I am looking forward to having you work on my engine soon.
I am looking forward to having you work on my engine soon.