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#46
January 25th 2010, 07:48
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nice! Can these be ordered online? I only found vague information about thorsten pieper on the web.
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www.vw1303s.com 
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#48
January 26th 2010, 03:29
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Quote:
Quote:
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#49
January 26th 2010, 03:39
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Quote:
Same size pressure as suction is odd. IIRC, the suction gears could be a set working in line? We are talking gear length, not diameter right?
__________________
'75 Super. ...because race car!
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#50
January 26th 2010, 05:51
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Nope,gear diameter.Here are some more pics.Maybe thereīs a difference in the housing? The long gears are 2 piece,then the 2 short gears behind the cover makes a total of 6,but all have the same diameter which is 32mm.Sorry,Iīm not a good photographer...
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#51
January 26th 2010, 06:58
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Quote:
Gear diameter is viryually the same for ALL pumps because the housing diameter in the case has a given size. So, pump capacity for our purpose is always measured in gear length... Dude, you must really get out more!
__________________
'75 Super. ...because race car!
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#53
January 27th 2010, 04:40
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Quote:
 I got mixed up,sorry  The 2 piece long gear has a total length of 38mm (26mm+12mm) and the shorter gear behind the cover has 26mm.
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#54
June 19th 2010, 10:50
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Hereīs another small update - itīs been a while..the 47x39 valves arenīt here yet,thatīs why they are missing the pics.Other than that the heads are finished.I still have a couple of minor things to do on the case,after that the engine can be assembled,finally!
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#55
August 9th 2010, 03:07
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Hi everyone,finally the custom order valves arrived! 47mm intake and 39mm sodium filled exhaust valves both with 8mm shaft.Unfortunately,I found that my case deck has to be milled,because it wasnīt 100% straight.So that will be put me back a bit and I wonīt be able to assemble until the case comes back.Iīm hoping it will be back in about a week or two.
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#56
August 9th 2010, 04:01
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Hey Mark,
How and where did you measure the case exactly to verify this? Nice looking valves, not sure about the sodium filling being the ones to use though. How much do they weigh? Tnx, Walter
__________________
'75 Super. ...because race car!
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#57
August 9th 2010, 04:40
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Hi Wally,
Thanks! I just used a straight edge and a dial indicator just like you would measure deckheight,only that you measure the case deck/spigots without the cylinders of course.I measured at 4 points on each bore,you must make sure that the straight edge is level to have a reference. I used aluminum tape which is 0.10mm thick to level the straight edge out.Once the edge is level ten you can measure the spigot/bore and detect a difference.The straight edge has holes for the headstuds.There was also a very small groove approx. 0.15mm where the cylinders "dug in" into the case,which I didnīt like to beginn with,but didnīt really bother anything,but this was the reason I decided to see if the spigots were level.Thatīs the way it goes,if you dig far enough you will usually find something..so I will have the case milled to the deepest measurement that was recorded,which was 0.15mm.The measurements varied from 0.10mm to 0.15xx mm.Iīm not sure if that is just a tolerance from the cast or if the cylinders actually pushed the case in due to expansion or whatever? it possibly may not have any effect on anything,but safe is safe.. I havenīt weighed the valves yet,I have a good scale at work and will weigh them today.Thereīs pros and cons for sure about sodium filled valves,I agree.These Valves are made by the same company that makes the valves for some of the WRC cars - so I donīt have any doubts really.
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#58
August 9th 2010, 04:48
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I forgot something,another way,which is easier,level out the edge and ride the dial indicator along the spigot and record the difference the needle shows.The indicator I used didnīt have a ball at the end,which forced me to be more creative..
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#59
August 9th 2010, 07:21
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Its difficult to picture what you described exactly, but I think I see what you mean/did. If I understand correctly, you measured the surface of each spigot hole to be flat and it was not.
Thats important of course, if not alone for sealing, but you still don't know if the distance from the crank centerline is equal for all cylinders right? Or did I miss s/th in your descirption? I like the superalloy valves of Ferrea and Manley, but thats said, the korean stainless $60,- per 4 valves (15 each therefore) from aircooled.net worked well in the 270 hp version of my stock-ish 2 ltr 914 turbo engine for quit a while at that power level, so more may be overkill anyways
__________________
'75 Super. ...because race car!
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#60
August 9th 2010, 17:00
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Good to hear you're almost ready to build Mark.
Are you doing anything special to the inside of the case as far as smoothing any sharp edges ? My webcam magnum straight cut gear set should be here any day now, so its almost time to dust off the engine assembly bench  Looking forward to your updates. Sandeep
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