The technique I use is to sit there with my left foot on the accelerator, keeping it wide open. I wait for a minute or two. Then without releasing it I hit the starter and very shortly it will fire up.

1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed

My Chevy Master 4 Door is on the Road!