Opel Forums - View Single Post - Side By Side Cylinder Head Comparisons/ RallyBob's Performance Suggestions

RallyBob · 03-17-2002

generally use Crower 1.25" springs (see, I'm already going against what I told you), and their 1.25" 7 degree titanium retainers. 10 degree are unnecessary for the street, we've run them to almost 10k rpms with no problems. You can buy these is sets of 8 by the way. These springs/retainers are lighter than 1.45" springs, so they reduce the unsprung weight a little. Also are very reasonably priced.

You can either do what I used to do, which is buy the 1.94" valves and turn them down to the required size, or order them from Manley. They will make them any size, turn-around is very fast. I prefer the undercut stem (Pro-flow?), they flow better and are a little lighter.

Bob

03-17-2002	#31 (permalink)
RallyBob Project 1450 supporter... Join Date: Mar 2002 Location: Pleasant Valley, CT Posts: 6,552 Classified Rating: 0% (0)	generally use Crower 1.25" springs (see, I'm already going against what I told you), and their 1.25" 7 degree titanium retainers. 10 degree are unnecessary for the street, we've run them to almost 10k rpms with no problems. You can buy these is sets of 8 by the way. These springs/retainers are lighter than 1.45" springs, so they reduce the unsprung weight a little. Also are very reasonably priced. You can either do what I used to do, which is buy the 1.94" valves and turn them down to the required size, or order them from Manley. They will make them any size, turn-around is very fast. I prefer the undercut stem (Pro-flow?), they flow better and are a little lighter. Bob Last edited by kwilford; 06-12-2005 at 12:27 AM..