p.mole1 Posted January 13, 2017 Share Posted January 13, 2017 Does anyone know what the duration and lift is for these camshafts ? and where I would be able to get hold of a rotor arm spigot ?ThanksPhil Link to comment Share on other sites More sharing options...
Englishmaninwales Posted January 13, 2017 Share Posted January 13, 2017 PhilI have got one or two rotor arm spigots in my spares, I ll take a look.Malcolm Link to comment Share on other sites More sharing options...
Englishmaninwales Posted January 13, 2017 Share Posted January 13, 2017 Or listed at Eliseparts.com for £33.95 + vat and p+p Link to comment Share on other sites More sharing options...
p.mole1 Posted January 13, 2017 Author Share Posted January 13, 2017 Hi Malcolm,Thanks, do you have one for sale?Many thanksPhil Link to comment Share on other sites More sharing options...
p.mole1 Posted January 13, 2017 Author Share Posted January 13, 2017 How does the K series SS camshaft compare to the Piper 633 cam? Does anybody have any experience of these cams Link to comment Share on other sites More sharing options...
Area Representative Richard Price Posted January 13, 2017 Area Representative Share Posted January 13, 2017 Yes, I've used both.SS and 633's are very similar duration, but 633's have a little more lift. Link to comment Share on other sites More sharing options...
The_ASH Posted January 14, 2017 Share Posted January 14, 2017 Lots of interesting stuff here excepting the lift and duration of the SS cams, follow 'fitting of verniers and timing cams' link and look at the very bottom of the page. Link to comment Share on other sites More sharing options...
Area Representative Nick Bassett Posted January 16, 2017 Area Representative Share Posted January 16, 2017 My understanding is the K SS camshaft has a lift of 9.6mm & duration of 266 degrees... Link to comment Share on other sites More sharing options...
p.mole1 Posted January 16, 2017 Author Share Posted January 16, 2017 Thanks,Seem very similar, how often do you need to check the valve clearances with solid cam followers? Link to comment Share on other sites More sharing options...
Alastair B Posted January 16, 2017 Share Posted January 16, 2017 633 grind is 10mm lift and 264 duration...well so says the internet, which might or might not be correct. Link to comment Share on other sites More sharing options...
p.mole1 Posted January 25, 2017 Author Share Posted January 25, 2017 Where might I be able to find the valve clearances for the Piper 633 camshaft. I can't seem to find any information on this cam Link to comment Share on other sites More sharing options...
Area Representative Richard Price Posted January 25, 2017 Area Representative Share Posted January 25, 2017 633's are a hydraulic profile. That's why you won't find clearances. Link to comment Share on other sites More sharing options...
p.mole1 Posted January 25, 2017 Author Share Posted January 25, 2017 Hi Richard,Thanks,but camshafts in my cylinder head are using a solid tappet type, I think some of the 1.4 Supersport Caterhams also had solid tappets and I can't seem to find the clearances for those either.I assume they would be similar. Link to comment Share on other sites More sharing options...
oilyhands Posted January 26, 2017 Share Posted January 26, 2017 8 thou inlet, 10 thou exhaust for all solid follower cams fitted as original equipment, SS, R300, R400, R500 , SLR/VHPD. Oily Link to comment Share on other sites More sharing options...
p.mole1 Posted January 26, 2017 Author Share Posted January 26, 2017 Thanks Oily Link to comment Share on other sites More sharing options...
p.mole1 Posted January 26, 2017 Author Share Posted January 26, 2017 Hi Oily,I have checked all the clearances. Is there any tolerance on the clearances,all the inlets are between 8 and 10 thou and all the exhausts are 12 thou apart from cylinder no 4 which are 10 and 8 thou. I am running a standard 1.4 SS ECU with a 7600rpm limiter and as yet have not had any problems with the current hydraulic tappets.Should I keep the solid tappets or switch to hydraulic tappets for an easier optionThanksPhil Link to comment Share on other sites More sharing options...
oilyhands Posted January 26, 2017 Share Posted January 26, 2017 I usually work to -1 to +2 on the stated clearances being serviceable, beyond these can be a problem. I would say yours are OK although not ideal. I would stick with what you have, just check them annually, if they start to tap, then check right away.Oily Link to comment Share on other sites More sharing options...
p.mole1 Posted January 27, 2017 Author Share Posted January 27, 2017 Thanks again Oily Link to comment Share on other sites More sharing options...
p.mole1 Posted February 13, 2017 Author Share Posted February 13, 2017 I have just checked the camshaft timing on my standard 1.4 SS and I have 24 thou on the inlet and 65 thou on the exhaust. I think that is 10 deg retarded on the inlet and about 4 deg advanced on the exhaust?. It's + or - 1 degree as I have been using one dial gauge and a 360 degree so I may have a spot of parallax error.Could this explain why the car has always felt a bit flat? it runs ok with no transmission shunt but nothing happens until 5000 rpm. I have always found the performance of this car a bit underwhelming.I am tempted to try it in it's standard form with properly timed cams before I fit the Janspeed head on with the 774 cams. Still trying to identify these! Link to comment Share on other sites More sharing options...
oilyhands Posted February 14, 2017 Share Posted February 14, 2017 64 thou on the exhaust certainly isn't advanced by 4 degrees, its more likely retarded by 4 degrees, lift at TDC should be around 60 on the inlet and 50 on the exhaust, that makes the inlet around 11 degrees retarded and the exhaust around 5 degrees retarded. The retardation of the inlet cam will kill mid range torque.SS cams will always be mistimed on the stock pulleys even if they are by some strange chance correctly aligned wth the crank as these are designed to run at lobe centres of 110/110 and the SS are specced for around 106/110.Oily Link to comment Share on other sites More sharing options...
p.mole1 Posted February 14, 2017 Author Share Posted February 14, 2017 Thanks Oily,I have fitted the vernier cam wheels to my standard SS just out of curiosity, I am quite surprised how far out the timing is on these cars! Do you recommend thread lock on the vernier adjustment screws? I have tightened them to 8nm, just a guess. Link to comment Share on other sites More sharing options...
oilyhands Posted February 15, 2017 Share Posted February 15, 2017 SS cams are pretty much always a mile out, the usual values are 10-20 thou inlet, 60-70 thou exhaust. You don't need threadlock on the vernier screws, just 10-12nm.Oily Link to comment Share on other sites More sharing options...
p.mole1 Posted February 16, 2017 Author Share Posted February 16, 2017 Thanks OilyI fitted the verniers, just of curiosity. It made a significant difference a vast improvement to the the midrange, I wish I bought them when I purchased the car! My camshaft is on its way back from Piper they have been really helpful. It has been checked and measured and Piper are sending all the specs then I can plonk the Janspeed head on and make a decision about them cams. Revilla is kindly sending me a set of 10mm camshaft bolts Link to comment Share on other sites More sharing options...
p.mole1 Posted February 21, 2017 Author Share Posted February 21, 2017 I got my cams identified and they are not quite what I was told they were by the seller.280 degree duration, nowhere near 264 degrees! I think they will be a bit wild, does anybody have a pair of 633 or 1320 cams for sale? Link to comment Share on other sites More sharing options...
Area Representative Nick Bassett Posted February 21, 2017 Area Representative Share Posted February 21, 2017 Sounds like you have a pair of VHPD cams there - think they are OK but you need solid followers and throttle bodies to run them...Other cams do come up from time to time - have you considered fitting VVC exhaust cams as an alternative? They are usually for sale on eBay etc...Why not ask Oily for his advice - you never know he might have some s/h cams in stock? Link to comment Share on other sites More sharing options...
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