Thanks for the explination. Are those the 355cnc heads?Its a 565 Dart Pro1 head. It's actually a nitrous motor will spray 300 to 400 on it when the customer is ready. not going to spray it on the dyno just ran out of time to finish the nitrous system. I'm expecting around 1000 n/a.
The reason for the vac pump is unless you throw down for a really expensive oil pump, it won't pump down the engine in the 30 seconds you have from when they give you the ok to fire and the green light. With a vac pump to help pump it down you can get 18 to 20 inches early.
Totally agree. Do you know anything about the Pro2's? I'm not a real Dart fan, but those things are huge for a conventional head.Yes they are the CNC 355. The customer already had them so that is what we went with.
With it being a nitrous motor I wasn't that worried about the heads. If it were to be just a N/A motor I would have suggested some BMF's or AFR's. I think the dart heads aren't quite as good but not bad by any means.