tuning questions

hey guys!!!

I Finally reached a point where i can get serious about tuning my ride. (90 forged 2.5 BVH, simon60cam, ported 2peice)

A couple questions though

1. Base cal selection. The actual car is a vnt daytona, so vnt electronics. Should i be using the 2.2 vnt cal and match the 2.5 timing and fuel (im thinking i need vnt cal for computer controlled boost and rpm limit)



2. i setup a testing cal (4.1 sbec 2.5 booststage2 matched lines set rpm limit to 3k), logged some full throttle data (drag brakes 2nd gear)

I excitedly entered the data to tune the pump eff table but the line is at 100%.....


So... as best practice should i be playing with the 'fcrcvb' <because of big mods> or upping fuel on the wotbl?
then play with the pumpeff

cheers

ps. rpm limiter didn't work. spark flag checked

i think i get the full throttle fueling.
with the car warmed up curve b and 'curve b factor' go to 1

Full throttle fuel = wottbl x pumeff x curveb x "curve b factor" so my full fuel pw is
16.1 x .867 x 1 x 1 = 13.96

so i can add a constant percentage of fuel with the curve b factor outside of what the wottbl is doing.... so i can set wottbl at the afr guidelines and add %20 more fuel like this

16.1 x .867 x 1 x 1.2 = 16.75

or i can just add 20% to the wottbl and leave curve b alone

19.32 x .867 x 1 x 1 = 16.75


so in my case the data i collected wants the pump at 100%... i can add 13% (100% - 86.7%) either the wottbl or curve b factor...... then collect more data.

am i out to lunch on this?

kinda....

CurveA, B and C are warmup enrichment's. they aren't for globally adding fuel

if you are tuning pumping efficiency and you are getting to 100% in that table (most likely at the torque peak), then you should do 1 of 2 things...

You can either scale FuelBaselineFromMap, FuelFullThrottle and FullPartThrottle up a bit and back down the Pumping Efficiency table down some and retune.

OR

You can rescale for injectors to a smaller injector size (more pulsewidth) and then back down the PumpingEfficiency and retune.

If you are running 52's, scale for 50 and try again.

whats your fuel pressure?

Brian