OH HAPPY DAY!!! (something has arrived......)
02-11-2011, 06:50 PM
#16
Former Vendor
[QUOTE=Jerry Feather;8291851]
They do look very porous, but perhaps that is just the size of the picture....
Erkka is correct. Lobes are not yet gowned. These are the raw blanks as they arrive from the factory. Quote]
I didn't say the lobes looked raw. I said the grinds looked raw. I would guess that these came from the foundry looking all black and having no grinding on them at all. The pictures look to me like there has been some extensive grinding done on them, and that grinding looks to me like it is kind of raw. I would expect finished grinding on the bearing surfaces to look quite a bit better than these seem to look. That is why I wonder if the grinding that is done so far is just rough grinding waiting for some finish grinding; and I don't mean on the lobes. Jerry Feather
I didn't say the lobes looked raw. I said the grinds looked raw. I would guess that these came from the foundry looking all black and having no grinding on them at all. The pictures look to me like there has been some extensive grinding done on them, and that grinding looks to me like it is kind of raw. I would expect finished grinding on the bearing surfaces to look quite a bit better than these seem to look. That is why I wonder if the grinding that is done so far is just rough grinding waiting for some finish grinding; and I don't mean on the lobes. Jerry Feather
02-11-2011, 08:31 PM
#17
Nordschleife Master
Thread Starter
Having seen and held other billet cams from the same foundry for a number of other applications such as the Dodge Cummin, I can say with certainty that this is simply due to the poor quality of the pictures taken.
The surfaces are all fully finished. Once I am home, I will get some pictures of far greater quality showing proper surface finishing etc.
As to the specs, etc. all of that is in the RW thread.
As well, I have the exclusive rights to these camshafts. I will not sell the blanks without them being fully ground and ready to be installed.
While there are possibly a few people on here (like Jim Morton), whom I would trust to ensure that everything was done correctly with grinding. It is simply better not to take that risk.
This ensures a quality product that will have zero issues for the end users.
I know that I would probably be able to sell the entire batch right now if I was willing to sell blanks. But it is simply not worth the risk!
The surfaces are all fully finished. Once I am home, I will get some pictures of far greater quality showing proper surface finishing etc.
As to the specs, etc. all of that is in the RW thread.
As well, I have the exclusive rights to these camshafts. I will not sell the blanks without them being fully ground and ready to be installed.
While there are possibly a few people on here (like Jim Morton), whom I would trust to ensure that everything was done correctly with grinding. It is simply better not to take that risk.
This ensures a quality product that will have zero issues for the end users.
I know that I would probably be able to sell the entire batch right now if I was willing to sell blanks. But it is simply not worth the risk!
02-11-2011, 10:31 PM
#18
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Nice job Colin - well worth the wait for you all.
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Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
02-11-2011, 10:56 PM
#19
Three Wheelin'
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Colin:
If you ever change your position on selling blanks, I would still like to try a set.
There are many intake cam profiles I would like to try on both 5.0 liter 928 4V engines as well as my larger dispacement 928 4V engine. I might be interested in one the Colt profiles offered, but IMO the profile info posted to date is too sparse to make a good engine / air flow model from.
Due to the lift velocity on most of the cams I want to try, I either need new blanks, welded blanks or billets. Without debating the feasibility of welding the lobes, the cost, if done right, is such that Mike Simard's billets are simply a better value. I do own 2 sets of Simard billets, but they are pretty pricey pieces to keep buying simply to keep developing / testing cam profiles as I continue to work the air flow / air flow modelling of 928 4V's.
FWIW and IMHO, I cannot see how selling cast blanks is a risk to you as long as you state a disclaimer of liability and disclose to a buyer the casting material, state of core, cam chainwheel and surface hardness. Not selling blanks keeps anyone but who you choose to grind cams out of the fold for having a lesser cost cam blank. Short of you possibly offering blanks, it gives us no other option than buying true billets, such as those sold by Mike.
Regardless of anything else, thanks for the words of competance.
If you ever change your position on selling blanks, I would still like to try a set.
There are many intake cam profiles I would like to try on both 5.0 liter 928 4V engines as well as my larger dispacement 928 4V engine. I might be interested in one the Colt profiles offered, but IMO the profile info posted to date is too sparse to make a good engine / air flow model from.
Due to the lift velocity on most of the cams I want to try, I either need new blanks, welded blanks or billets. Without debating the feasibility of welding the lobes, the cost, if done right, is such that Mike Simard's billets are simply a better value. I do own 2 sets of Simard billets, but they are pretty pricey pieces to keep buying simply to keep developing / testing cam profiles as I continue to work the air flow / air flow modelling of 928 4V's.
FWIW and IMHO, I cannot see how selling cast blanks is a risk to you as long as you state a disclaimer of liability and disclose to a buyer the casting material, state of core, cam chainwheel and surface hardness. Not selling blanks keeps anyone but who you choose to grind cams out of the fold for having a lesser cost cam blank. Short of you possibly offering blanks, it gives us no other option than buying true billets, such as those sold by Mike.
Regardless of anything else, thanks for the words of competance.
02-11-2011, 11:55 PM
#20
Nordschleife Master
Thread Starter
Jim,
I do understand what you are saying, but we all know that there are those few out there which would get the cams, have them ground incorrectly. Then want me to refund their money for selling "junk".
Before this happens I would rather build a solid reputation and prove that these are a top quality product.
As well, if anyone has a specific grind that they wish to see. Please contact me privately and I would be more than happy to work with you to get the desired profile!
That said, at the price which I will be selling these at as finished, ready to install cams cut to your profiles. I feel that I am bringing them in at a very reasonable price range.
As well Jim, I know numerous fellows who are running your regrinds, and have had no issues. This track record is what I look at with regards to the comments I have made. As well, I know many people whom I trust who have met you personally and speak very highly of you.
I do understand what you are saying, but we all know that there are those few out there which would get the cams, have them ground incorrectly. Then want me to refund their money for selling "junk".
Before this happens I would rather build a solid reputation and prove that these are a top quality product.
As well, if anyone has a specific grind that they wish to see. Please contact me privately and I would be more than happy to work with you to get the desired profile!
That said, at the price which I will be selling these at as finished, ready to install cams cut to your profiles. I feel that I am bringing them in at a very reasonable price range.
As well Jim, I know numerous fellows who are running your regrinds, and have had no issues. This track record is what I look at with regards to the comments I have made. As well, I know many people whom I trust who have met you personally and speak very highly of you.
02-12-2011, 11:47 AM
#21
Rennlist Member
02-12-2011, 12:06 PM
#22
Rennlist Member
Contemplating a return or refund simply because someone changes their mind or made a mistake in the purchase in the first place does not make good sense. That simply makes the first buyer a seller and the first seller a buyer, and why would the first seller want to be a buyer of something that he may still have several of to sell at the original price. Or, if it was a one time item, why would or should the seller be interested in buying back something that he sold to get rid of in the first place. Again, that is unless there is something wrong with it, as stated above, not including some kind of buyer's remorse.
Jerry Feather