That takes me back a way. Looks like the engine uses 45DCOE Webers or Delortosengineguru00 wrote:I am currently running CFD for GTR on the project and hopefully we will have some numbers/pictures in the next day or so. I did notice a few things when looking at the model though (alot easier when you can rotate it). The sidepod exits lie directly inline with the lower beams of the front axle, which could cause some issues cooling wise but my guess is the cooling system is over sized.
My time as an engine guy also gives me a few concerns on the ram air plenum that I saw. Be careful with the pressure distribution across the system as it runs on the track, its likely the rear cylinders will be drawing from much higher pressure than the fronts and this difference in pressure will change with track speed. Is this engine carbed or EFI? Nice thing about carbs is they self regulate in this case, where as EFI wont automatically unless you run a closed loop correction system on every cylinder individually.
Knife edge the butterflys and smooth out the venturis for better airflow, there is a couple of bhp there to be had. You might have problems on the air front to rear in the ram air plenum as mentioned. You should be able to get over it so long as it is not severe by changing the air correctors front to rear in the four barrels. It depends on the range of jetting for different tracks you have. For shorter tracks I would change to 48IDA Webers for a bit more bottom end torque. Downdraft though, so a different intake.
You could post your jetting if you like, would be interesting.