Ok Since Malibu Jack and others have hooked us up with this great tool to log, I have been doing wideopen throttle pulls like every chance I get to log them. The load calculation is accurate as the timing I see does correlate to the load point in the ignition map, but the most load I have hit so far is 248. My mods are 3inch test pipe, exhaust, downpipe, boost at 20psi stock solenoid no taper,map rescaled to 300, upper and lower intercooler pipes, intercooler, k&n cone filter, and walbro. If you are able to calculate load pretty accurately please post your mods with the highest load you have hit with your mods. Just trying to see if I am in the right neigborhood with the load I am getting for my mods..

 

I run a 24psi spike on 93 octain dropping down to 20.5 by redline. Mods are ghetto K&N cone intake, MBC, ebay TBE & ebay FMIC. I regularly hit high 280s in the load section anywhere between 4000-5500 RPM. Always drops off to 220s by 7k.

before I switched from the stock air box & K&N filter I was seeing mid to high 260s with all other mods being the same.

 

I'm seeing about 265-270 at 3200-3400 rpm. Evo IX with mail-in flash. I'm using the same formula that MalibuJack is using in his EvoScan log analyzer.

 

248 sounds about right for 20 psi i would think.

 

How much boost are you running?

 

Yea but that is at a certain point, by the time I reach redline the load value drops to about 220 but my boost guage does not show the boost to drop off.

 

24psi spike down to 19-20 on 93 oct mods:Flatline Lancer Mods
I stay in the high 280s to 300 from around 5K-6.5K.
hope that helps?
edit: oh yeah, it tapers down to about 240 load cell up top (~19psi)

 

Here's one of my tables. I'm boosting around 28-29psi on meth with some minor knocks. My load table is scaled to 300 as well.

 

Load value will always drop once your outside of peak torque... So if you get 300 at peak torque, it'll drop at least two columns by redline.. IT has nothing to do with boost, but Volumetric efficiency drops..

The highest I've gotten at 23psi on my GT35r at peak boost is 331 (I'm scaled to 340) and my ignition was breaking up at 6000rpm so I haven't made a complete run yet, but on my older logs with the stock turbo It would hit about 240-260 and fall off to 220 at redline also at 22/23psi boost tapering to about 19/20psi..

This is perfectly normal, especially with an aftermarket cone filter and intake pipe.. Stock Airbox should hit 260 or so and fall off a bit.. Obviously since that is what the ECU is calibrated for..

 

Man 331 on a gt35 without laying it down all the way sheesh lol, you think you breaking up from ignition or the tune?

 

As MalibuJack has stated, this is because of VE dropping as RPMs increase.

Certain mods can help you hold your load (mass airflow/rev) longer, like cams, sheet metal intake manifold, bigger turbos (hotsides), free flowing exhausts, etc, but with our stock IM, turbos, and cams, our VE will drop off, depening on mods, as you approach redline.


Eric

 

248 sounds about right for a stock 9.8 turbo with contemporary bolt ons, stock cams, at 20psi. Load will repond to any seemingly minor alteration - like an upside-down MAF or dirty one.

You should consider trying 280% load for accuracy since you don't need 300%, thats what I use (280). Remember load is just a calculated value, amount of time it took to travel a distance is the important figure

 

25 psi according to the stock boost gauge. Probably more like 23-24 psi.

 

Nah the tune is alright... the reason my car gets high loads is the calibration of the blowthrough sensor is a bit off in the midrange.. However even at much higher boost levels, it shouldn't go higher than 360 at peak, it'll just go to higher load sites at higher RPM.. Its entirely possible that 340 is "normal" for a GT35r but the stock MAF may not be reading entirely correctly at airflow rates that high.. since my MAF curve otherwise mirrored the stock curve on a stock turbo..

 

i rescaled our ix's to 320 because at 23psi peak, tapering down to 18 psi at redline (as i want) we were overrunning 300.... otherwise its fine.

mods are megan header, o2 housing, drop in BMC, hallman pro rx, upper helix pipes, lower HPF pipe, aps bov, 3" turboback catless

cb