[Diy_efi] Tuning on Dynapack

[John Andrianakis]

If you choose some convenient points in each rpm band and watch for trends
and interpolate in between you should have completed tuning in the 2
hours.You should ask the operator to work in rpm hold mode and hold various
throttle openings as long as you need to optimise fuel and ignition at each
point. I operate a dynapack and usually can do a complete tune in 2 hours if
I dont need to let the car cool down much between tests.

----- Original Message -----
From: "Todd A. Pepmeier" <tpepmeie at yahoo.com>
To: <diy_efi at diy-efi.org>
Sent: Monday, June 30, 2003 2:07 AM
Subject: [Diy_efi] Tuning on Dynapack


All,
I will be fine tuning my fuel & spark maps on a Dynapack dyno in a few
weeks.  This is an eddy-current type dyno, not an inertial like Dynojet.  My
objective will be to optimize for best torque.

For those that have tuned maps this way, any tips?  I have a 17x30 Fuel Map
and a 16x23 spark map (1228331 ECM, BFXB code, 1991 Corvette ZR-1).  I have
two hours booked, so I don't think I will get to optimize each data point.
I guess I will pick a few at each RPM band, and interpolate the rest later.

Using the Romulator and WBO2, I've got the part-throttle at 14.7:1 already,
but want to see what makes best torque at those loads.  Suppose I just start
increasing the VE (and spark advance) until best torque?

Appreciate any guidance, especially if you've used a Dynapack before.

Regards,
Todd Pepmeier



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