xRoguex

iTrader: (15)

We have almost identical mods. I do not run meth tho and I have an 80mm red.

I just put down 400 on buschurs dyno at 23psi with 2 deg of timing and a motor that was falling apart haha.

scheides

iTrader: (10)

So is the temp correction worth using? It brings the numbers at least into the relm of possibility, but still seems awfully high.

Jack_of_Trades

iTrader: (17)

I added the Weather Correction feature per Evo-m member requests though I don't know how perfect it truly works since I never personally use it lol. I got all of the calculations online to match the way 90% of the dyno's calculate their weather corrections although I am aware there are some slight variances between my 'simple' math and some of the more complex readings the dyno shops use with their weather station interfaces. I just use the VDR for before/after logs while tuning so I can definitively see gains/losses. You'd think me of all people would be a wizz at VDR, right?lol

From the large group of users using VDR these days, it seems to be reasonably accurate in almost all situations, assuming vehicle weight, occupants weight,gear ratios and tire diameter are all selected correctly. The flat surface is a biggy. I added 150whp once by doing a pull down a slight downgrade on the highway once,maybe a 5 degree decline? They say every 11*F of temperature drop is something like 1-3% increase in power as a general reference. If I go by that range, that would roughly be a 7% to 20% increase in power from 80*F to 3*F *shrug* I would lean more towards the 1% increase.

Colt4g63

iTrader: (8)

Well said Jack. The flat ground is a biggie... I have a special spot thats as flat as it gets that i do all my testing on. Im sure that's one main contributing reason mine are so consistent and accurate to the Dyno Jet that i use.

As matter of fact i put a log run of my friends 91 Laser FWD turbo with a 16G on E85 and 19-20psi through this software and got 330s WHP... Went to a local 2WD Dyno Jet and put down 339WHP. Pretty damn accurate for me!!

scheides

iTrader: (10)

Ya idk, I made all of these pulls on a few different spots on open, flat, perfectly straight freeway. I know the graphs look super wonky if you turn the steering wheel at all. All of the pulls were in the 475whp range on evom_comparator setting and 525whp dynojet. This is just insane to me, the car feels quick but idk if its *that* quick

So the temperature stuff is an educated guess. Not aweful but not super proven either. I'll try a few more 3rd gear pulls and see how they look.

project_skyline

iTrader: (30)

When I go pickup e85 this week I'll do some cold weather pulls and see how things look compared to with my hotter weather pulls.