350bhp on stock turbos?

[lateshow]

They are pretty nice figures. I achieved 680nm before we stopped going any further with it as i was unsure on the bottom end taking more than 500lbft. I also ran mine on 109 octane to find the true afr sweetspot. What was found was that above around 11.5 it made very little difference to the output, the biggest problem was that there just wasn't enough air getting in to the engine due to the very conservative stock cams. In general though a lambda value of 0.88-0.91 will give you maximum power, which is contrary to what you would believe if you look into the chemistry behind it. Unfortunately the thermodynamic behavior of a conventional spark ignition ICE adds far more complexity, and is not a fixed volume/temperature reaction vessel.

What do you mean be 109 octane. Was it some kind of race fuel (still gasoline/petrol) or was it E85. Since in nearly every car the AFR spot for ethanol based fuel has been over 12 (in na engines close to 13). I believe that with gasoline what you're saying is correct. As we know the chemical reaction is different with alcohol. You don't get E85 in UK?

Did you have a modified fuel rail? If using standard rail and big injector can one be sure that the last injectors in line get nearly the same amount of fuel as the first ones? GTO has been known for that problem. Could that requirement for 11.5 have something to do with cylinders in the back going slighlty leaner?

[CANDEE]

Did you have a modified fuel rail? If using standard rail and big injector can one be sure that the last injectors in line get nearly the same amount of fuel as the first ones? GTO has been known for that problem. Could that requirement for 11.5 have something to do with cylinders in the back going slighlty leaner?

You can get these: http://www.3sx.com/store/comersus_vi...idProduct=1164, which will fix the fuel leanout issue on the rear bank.