Just closed deck but power output will stay the same or limited to 800rwhp
Max WHP on open deck engine
- Thread starter Cmiggz
- Start date
35 psi for how long and what was the fuel used? That's impressive. I feel uneasy running mine at 27 psi.
A concern of mine has been if the ring gap closes up. Might be able to throw 35 psi at it for a few seconds of WOT but how many pulls in a row before the ring closes and boom!?
In my experience ovaling of the stock cyls is just a matter of time, regardless of power level. Running more cyl pressure exacerbates the issue obviously. I went from 175-185psi compression across the board to 135-150psi in the space of a few thousand kilometers, despite the engine never (in its life) seeing >22psi. Also seen it happen to an FBO stock-turbo setup @ the 85,000km mark. Keep in mind we don't have access to E85 here so cyl pressures aren't extreme.
Doesn't e85 cool down the motor more so than premium gas?
While E85 reduces combustion and component temps somewhat, the additional timing (and boost) it allows greatly increases peak cyl pressure, which is the primary factor which ovals cyls.
I have several done already, one shipped out, one for an engine we're building locally besides my own, and one getting finished machined as we speak
It cools the air coming into the cylinder and the cylinder and piston due to evaporation and a higher latent heat energy.
EGTs may be lower at the same power level vs gasoline but when E85 or any other ethanol blend is making more power, it's because the peak cylinder pressure is higher. The knock resistance of ethanol allows more boost and/or timing to be run.
Countries lacking E85 are generally knock limited by the fuels they can use. So they can't run as much boost and/or timing. They generally see lower peak cylinder pressures so should be less ovaling. Water Methanol injection can be an option to change that.
Hi Kenjermen:
How long have you been running over 900 whp with the open deck engine?
Couple months now, made 900 about a year ago but I am constantly making upgrades/changes to the car
Are you still on the upgraded clutches factory transmission? If so how is she holding the power this far
I was original trans when I made 900, the input shaft was the weak link and evenually broke. Now the trans has upgrade baskets/shafts and propulsion dynamic clutch packs and seems to be pretty solid so far
