What is your fuel rail pressure reading. Woody

 

48-65 psi. Thats a 17psi fluctuation within milliseconds.

 

How much octane are you running? I would try 98 or 100 Octane and check if the car also pulls 3 degrees of timing from 3rd to the end of 4th, like your car did during the run...Further reduction of IATs would also help.

 

I dont know but seem to believe that your w pump had a regulator added too. Please set the idle pressure up to about 70 psig at idle and give it a go. The millisecond reading are very likely noise and not actual changes, the pump and regulator dont have that much dynamic range.

I think you will go a long way toward fixing the overly lean condition with that, WOODY

and yes WEEKEND
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The octane is always 93 from chevron or exxon. The higher octane might not be a bad idea. You think a couple of gallons per tank would work, or are you meaning a full tank of race gas?

I dont know how to further reduce IAT's since i have a supercooler and separator valves...?

I am currently running a non-return style setup. The return hose is still on the car and i could buy another adjustable FPR but my question is even if i adjust it to 70psi how am i gonna dial it back in the midrange.....?

 

I would drive the tank (nearly) empty, and then use a quarter or half tank of higher octane for testing. Here in Germany we can get 98 Octane on every gas station and 100 octane on selected ones.

According to IATs : for example more Volume of IC-Fluid in the separated System, IC-Heatwrap, more flow with stronger Pump etc.

 

Thats really interesting 240M3SRT Have you tried from a dig? If so how did that comparo go?

 

Forget midrange, get it to not be lean and evaluate the parameters at that point based on what they are actually. Never fear fear, Its like dragons, they can be challenged: they are not used to being challenged and they cant back up.

WOODY

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Octane in the US is calculated differently than in Europe. Your 98 Octane is the equivalent of 93 Octane in the states.

Generally, octane ratings are higher in Europe than they are in North America and most other parts of the world. This is especially true when comparing the lowest available octane level in each country. In many parts of Europe, 95 RON (90-91 AKI) is the minimum available standard, with 97/98 RON being higher specification (being called Super Unleaded). The higher rating seen in Europe is an artifact of a different underlying measuring procedure. In most countries (including all of Europe and Australia) the "headline" octane that would be shown on the pump is the RON, but in Canada, the United States and some other countries the headline number is the average of the RON and the MON, sometimes called the Anti-Knock Index (AKI), Road Octane Number (RdON), Pump Octane Number (PON), or (R+M)/2. Because of the 8 to 10 point difference noted above, this means that the octane in the United States will be about 4 to 5 points lower than the same fuel elsewhere: 87 octane fuel, the "regular" gasoline in Canada and the US, would be 91-92 in Europe. However most European pumps deliver 95 (RON) as "regular", equivalent to 90–91 US AKI=(R+M)/2, and deliver 98, 99 or 100 (RON) (93-94 AKI) labeled as Super Unleaded - thus regular petrol sold in much of Europe corresponds to premium sold in the United States.

 

[quote=240M3SRT]
I dont know how to further reduce IAT's since i have a supercooler and separator valves...?

a couple things to further drop the iat's wpould be a 180 tstat from pte and a -10 degree fan mod from any star diagnostics shop. water wetter would help also.
im also adding a 1.2 gal. tank in the trunk along with the longer 3/4 " hoses should net just over 2 gals added coolant. while this will eventually heat the entire system to a degree but will cool quicker and allow the flow to cool as it is passed thruought the system
i also have some heatwrap from brianbrave to wrap the intercooler when the s/c is removed for rebuild. while this is a ways off it is just another attempt to cool the beast down!

 

I looked this up in wikipedia, and you are correct. Our octane on the label is the ROZ and the U.S. Gas is ROZ+MOZ: 2. So our 100 Octane (100ROZ+88MOZ), which I always use is the equivalent to 94 Octane in the U.S. Good find...