we all know all motor is always more expensive than going FI.

i'm very pleased to see the numbers and i think that is a great number.

like everyone have said already...dont know how reliable it is.

 

Um, ignorant post to follow..........

I have always been told that the optimum shift point is where torque stop building or falls off, and near the maximum horsepower point, which according to the graphs you just posted is about somewhere in the 6500-6900 rpm range. If that assupmtion is not total garbage based on faulty understanding, where do you have VTEC set to kick in? At the stock 6000 you would not have much VTEC at all before a shift.?.?.

 

[QUOTE=vader1,Nov 22 2004, 03:05 PM] Um,

 

What gear were the dyno runs done in?

 

Although gearing does have some effect on the dyno numbers, it is very small. Dynos measure the actual torque to the wheels (~ 2100 ft-lbs peak in 1st gear, ~1400 ft-lbs peak in 2nd gear, etc.), then factor out the gearing to come up with an approximate 1:1 number.

 

any updates?

 

This is untrue of a Dynojet. A dynojet measures horsepower, it measures the amount of acceleration of a known weight that the car can produce. It is not measuring peak torque to the wheels, as torque is a force without a time component, it's relatively meaningless in and of itself in terms of acceleration.

You have to have RPM to compute torque at the flywheel from horsepower. (rpm is the time component)

 

No real reason for a dispute here, but I think you have it backwards. Torque is a rotational force, which is the product of mass and accelleration. Accelleration includes the time component. I believe that a DynoJet measures torque directly, then calculates HP by adding in RPMs.

 

Nope. How can it measure torque? Dynojet has a large mass and it keeps track of the rate of rotation. You change the rotational velocity X amount, that means you make X horsepower.

If what you say is true, try using a dynojet with no RPM pickup. You get a nice clean horsepower graph, with no torque. (that's because torque at the flywheel is computed from horsepower at the wheels.)

Torque at the wheels would be entirely gearing dependent and would require you to know gearing to bring back a meaningful figure, dynojets don't have a gearing input.

 

Very nice write-up and pics!

Asghar.