Trying to trace david of pumaracing
Discussion
Since he escaped to the Los Angeles Someplacegrimupnorth Underground, he's been acting as a solder of fortune. If you need help and no one else can help, then maybe, just maybe you can hire the A B team.......
Alternatively, start a thread with a title like "I replaced my engine oil with chicken soup, will it be ok to drive?" and i'm sure Pumy will be along immediately with some scathing criticism.... ;-)
Alternatively, start a thread with a title like "I replaced my engine oil with chicken soup, will it be ok to drive?" and i'm sure Pumy will be along immediately with some scathing criticism.... ;-)
Pumaracing said:
I'm sure I can leave any chicken soup type questions to my protégés on here. Some of them are coming along quite nicely now 
Anyhoo, what can I help with?
..nothing too exciting, CVH questions, pity your site is down as that was a good read..Anyhoo, what can I help with?
OK car has been laid up, I'm wanting to ensure good start up lubrication from the off, what would you recommend for the cam lobes themselves to ensure they stay in the shape that was intended prior to oil getting up there?
Do you [or anyone] know if there are any haynes manuals still going for these engines, mine came from a cvh 1598
carb XR2 C reg...On the performance front, I don't think there's much more to be done, the head [the "proper semi hemi type] has been quite heavily worked, valve guides, ported etc, oh and it has also been skimmed itruns a kent cvh22 cam, moderately high lift, with about 4 deg of overlap, [cam timing is really important here it should still be set up right but who knows what the grease monkies have been up to, the vernier shouldn't have been touched since it was set up] I just want to get it running and check oil pressure, flow, get it warmed up properly and see where we are etc, etc..
cheers
Mo.
My site is all archived here.
https://web.archive.org/web/20110902010921/http://...
If the cam is already run in and the car has just been off the road for a while then the oil will find its own way up there pretty damn quick.
https://web.archive.org/web/20110902010921/http://...
If the cam is already run in and the car has just been off the road for a while then the oil will find its own way up there pretty damn quick.
Thanks David.
Turn 7, yes thats what I intend to do thanks guys.
PS it's a cvhk 23 cam that fitted pretty wild for a hyd lifter-> 2.5k to 6.8k....290 duration..
Ref:
http://www.kentcams.com/product-details/112/Camsha...
Turn 7, yes thats what I intend to do thanks guys.
PS it's a cvhk 23 cam that fitted pretty wild for a hyd lifter-> 2.5k to 6.8k....290 duration..
Ref:
http://www.kentcams.com/product-details/112/Camsha...
Edited by Mojocvh on Thursday 3rd September 12:42
The CVH23 is clearly very new. I've never heard of it and it's not even in their 2012 catalogue. The online data is also deeply suspicious. Inlet timing of 30/65 degrees indicates 275 degree duration not 290 so who knows what it really is. It has less lift than the CVH33 which is a genuine 290 degree cam so presumably it has less duration too. Best guess is it's somewhere between the CVH22 (genuine 7% power increase) and the CVH33 (genuine 11 or 12% increase). The Kent power claims for their cams have always been quite outrageous and the catalogues full of errors.
Of course those of us who practice the "real world hands on tuning" don't tend to rely on cam catalogues for accurate data. It tends to leave one with egg on ones face.
Of course those of us who practice the "real world hands on tuning" don't tend to rely on cam catalogues for accurate data. It tends to leave one with egg on ones face.
Pumaracing said:
My site is all archived here.
https://web.archive.org/web/20110902010921/http://...
That site is a bit of a goldmine!https://web.archive.org/web/20110902010921/http://...
The TOOL USE TECHNIQUES section which covers the freeing up stuck fasteners should be made a sticky in the Technical section.
The cvh23 has been out for a long time but it never really worked as well as the cvh22. The cvh33 was quite a good cam to that really suited twin webers. My all time favourite cam in the cvh was the 22, really nice all round cam with nice road manners. A friend had one of your heads Dave, it was the semi big valve one, I'm sure it had a cvh33 and a dgav on it,,, flying machine around Knockhill!
If I could obtain good enough blanks to regrind on I always used to use my own profiles in CVHs so maybe it's not that surprising I didn't come across the Kent 23 if it wasn't even in their catalogue. Maurice who used to grind them for me is long since retired though. The 001 profile did everything road based and drove like a stock cam but with 7 or 8 more bhp at the top end and the 002 profile was for twin carbs, track use and full monty road engines. I guess the CVH22 and 33 were the closest comparisons and you didn't really need much more than two choices for the CVH.
I actually remember that test now. I may even have the magazine lurking somewhere. It was an appallingly conducted affair. The stock springs and lifters easily rev to 6500 which is where the std cam would be dropping off big time but the performance ones would be going strong and showing the largest gains but they never bothered revving it that high. Even the RS1600i cam on solid lifters was bottled at 6000.
However the big trick they missed was just to drop the 1600i solid lifter cam in on the stock hydraulic lifters which is what I did on many engines. The 1600i has more lift than the Piper 270 or 285 or the Kent CVH22 and the same duration as the hottest of those. It therefore beat all of them for power so I have no idea why it supposedly fared so badly in this test.
However the big trick they missed was just to drop the 1600i solid lifter cam in on the stock hydraulic lifters which is what I did on many engines. The 1600i has more lift than the Piper 270 or 285 or the Kent CVH22 and the same duration as the hottest of those. It therefore beat all of them for power so I have no idea why it supposedly fared so badly in this test.
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