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 Posted: Tue Jul 30, 2013 3:13 pm |
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Joined: Feb 08, 2013
Posts: 36
Trade Rating: 0
Location: Rugby
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How can I tell if my car has been cammed already  thinking about doing it but feels nippier than my mates revs nice and freely and has good power from around 2000 - 5800 rpm
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Posted: Tue Jul 30, 2013 3:51 pm |
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Joined: Jul 28, 2010
Posts: 1131
Trade Rating: +1
Location: Milton Keynes
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Take off the rocker cover and check is the best way.
Probably would be a lumpy idle, easily noticeable.
Your car could be faster due to better service history, or just had an easier life.
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Posted: Tue Jul 30, 2013 4:31 pm |
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Joined: Feb 07, 2010
Posts: 7093
Trade Rating: +11
Location: Suffolk
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Rip the cams out and check for factory markings at the end
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| Team Impossible Possible
The only way of finding the limits of the possible is by going beyond them into the impossible - Arthur C. Clarke
Forged 1.6 Turbo
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Posted: Tue Jul 30, 2013 4:42 pm |
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Joined: Feb 08, 2013
Posts: 36
Trade Rating: 0
Location: Rugby
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idle does seam a little lumpy :/ and what factory markings would i be looking for??
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Posted: Tue Jul 30, 2013 4:50 pm |
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Joined: Feb 07, 2010
Posts: 7093
Trade Rating: +11
Location: Suffolk
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A single letter at the end of the cam, near the thermostat housing. If I remember correctly it will be a J
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| Team Impossible Possible
The only way of finding the limits of the possible is by going beyond them into the impossible - Arthur C. Clarke
Forged 1.6 Turbo
Click to see more
144Bhp @ 7PSi - 193.9Bhp @ 13psi
206 Gti Race Car
Click to see more
For all Race/Track Preparation, Feel Free to PM Me!
Whether its for a custom ratio gearbox or track-day alignment, I can help! | |
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Posted: Tue Jul 30, 2013 6:09 pm |
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Joined: Feb 08, 2013
Posts: 36
Trade Rating: 0
Location: Rugby
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ill have a look 2moz thanks for the help
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Posted: Wed Jul 31, 2013 1:31 am |
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Joined: Feb 08, 2010
Posts: 7045
Trade Rating: +5
Location: In the garage
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Markings would be the same if the cams had been reprofiled. Lumpy idle will only show on long duration cams on standard inlet...cams with just a higher lift would be smooth still...I have long duration cams on mine and the idle is silky smooth.
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| 2001 GTi 138, Bilstein Sprint dampers, H&R springs, 21mm Peugeot Sport torsion bars, 22mm rear ARB, Peugeot Sport Group A wishbones, 283mm discs, Goodridge stainless hoses, Maniflow 304 grade 4-2-1 2.5" manifold and system, 200 cell cat, Richard Longman head, 45mm Jenvey throttle bodies, 9.5mm TB spacers, 90mm air horns, Jenvey throttle linkage, Jenvey fuel rail, Aeromotive and Goodridge fuel fittings and braided hose, ITG sausage filter, Radtec custom radiator, Piper Ultimate Road cams, Piper vernier pulleys, Omex 600 ECU. Saxo electric PAS pump, Vibra Technics engine mounts. Samco coolant hoses, TTV steel flywheel, 4.76 final drive ratio, 307 CC 180 ratios. 2019 BMW 530i. 2017 Mercedes C300 convertible. | |
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Posted: Wed Jul 31, 2013 8:29 am |
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Joined: Feb 07, 2010
Posts: 7093
Trade Rating: +11
Location: Suffolk
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| Edward wrote: |
| Markings would be the same if the cams had been reprofiled. Lumpy idle will only show on long duration cams on standard inlet...cams with just a higher lift would be smooth still...I have long duration cams on mine and the idle is silky smooth. |
But then if they were reprofiled it would be clear on the lobes. The ends would be a black shade compared to the normal
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| Team Impossible Possible
The only way of finding the limits of the possible is by going beyond them into the impossible - Arthur C. Clarke
Forged 1.6 Turbo
Click to see more
144Bhp @ 7PSi - 193.9Bhp @ 13psi
206 Gti Race Car
Click to see more
For all Race/Track Preparation, Feel Free to PM Me!
Whether its for a custom ratio gearbox or track-day alignment, I can help! | |
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Posted: Wed Jul 31, 2013 5:43 pm |
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Joined: Feb 08, 2013
Posts: 36
Trade Rating: 0
Location: Rugby
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looks like its been cammed but ill have a proper look if the weather is better 2moz took the rocker cover off and just had a look down the side of the engine
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Posted: Wed Jul 31, 2013 9:16 pm |
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Joined: Apr 03, 2010
Posts: 455
Trade Rating: +8
Location: Ashford, Kent
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Just a note on repro's - they are not a good idea especially with hydro followers as they have to pump up quicker. If you are going to cam an engine, do it right and buy from new cast.. unless you are on a uber tight budget... but then you will find said followers steadily decreasing in performance and ultimately loosing power when they no longer pump up quick enough to take up the clearance...
...and what Ed said is right about duration and lift. Depending on whether you are looking for torque of higher top end power, you would bias one over the other.
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Posted: Thu Aug 01, 2013 4:19 pm |
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Joined: Feb 08, 2013
Posts: 36
Trade Rating: 0
Location: Rugby
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Thanks for all the advice on cams and reporfs
Had the rocker cover off completely today as nice and dry out there and found the lobes to be very shiny on most of the outer side then a darker end bit ??
Does this means they've been reprofiled or could this be wear and tear??
Also the pulley is a nice shiny blue well it is when I cleaned it up abit lol
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Posted: Thu Aug 01, 2013 6:22 pm |
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Joined: Apr 03, 2010
Posts: 455
Trade Rating: +8
Location: Ashford, Kent
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The nice shiny blue pulley sounds like an alloy vernier which often accompanies a performance cam. The shiny bits on the cam is where the lobes are making frequent contact with the followers; the darker side being where there is not, which should be on the base of the lobe. This will probably be where the oil deposits have collected and darkened the metal, but perfectly normal.
If you have a micrometer you can measure the lobe height and compare it... but by the evidence of the alloy pulley alone, it sounds like you have yourself a cammed engine already... game on =)
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Posted: Fri Aug 02, 2013 9:08 am |
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Joined: Feb 08, 2010
Posts: 7045
Trade Rating: +5
Location: In the garage
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Measure the base circle of the cam - i.e. the smallest diameter then measure the largest diameter. Take one from the other and that gives you the valve lift - in it's simplest calculation. Then you need to measure a known standard cam to see if there is a difference.
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| 2001 GTi 138, Bilstein Sprint dampers, H&R springs, 21mm Peugeot Sport torsion bars, 22mm rear ARB, Peugeot Sport Group A wishbones, 283mm discs, Goodridge stainless hoses, Maniflow 304 grade 4-2-1 2.5" manifold and system, 200 cell cat, Richard Longman head, 45mm Jenvey throttle bodies, 9.5mm TB spacers, 90mm air horns, Jenvey throttle linkage, Jenvey fuel rail, Aeromotive and Goodridge fuel fittings and braided hose, ITG sausage filter, Radtec custom radiator, Piper Ultimate Road cams, Piper vernier pulleys, Omex 600 ECU. Saxo electric PAS pump, Vibra Technics engine mounts. Samco coolant hoses, TTV steel flywheel, 4.76 final drive ratio, 307 CC 180 ratios. 2019 BMW 530i. 2017 Mercedes C300 convertible. | |
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Posted: Fri Aug 02, 2013 9:23 am |
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Joined: Apr 03, 2010
Posts: 455
Trade Rating: +8
Location: Ashford, Kent
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Bloody hell we're nerds...
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Posted: Fri Aug 02, 2013 1:06 pm |
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Joined: Jun 04, 2010
Posts: 1691
Trade Rating: +3
Location: northallerton
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| SinfulDesignCom wrote: |
Just a note on repro's - they are not a goodod idea especially with hydro followers as they have to pump up quicker. If you are going to cam an engine, do it right and buy from new cast.. unless you are on a uber tight budget... but then you will find said followers steadily decreasing in performance and ultimately loosing power when they no longer pump up quick enough to take up the clearance...
...and what Ed said is right about duration and lift. Depending on whether you are looking for torque of higher top end power, you would bias one over the other. |
With mine i had to get piper followers as mine had seized after 60k miles lol
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