Post #1
What type of cams come on the gti6? What's the difference between the mechanical vs the hydraulic?________________________________________
RJ
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displaying posts 1 to 22 of 22
| Author | Subject: Mechanical vs Hydraulic Cams |
 speedo306
Regular  Location: Trinidad & Tobago Registered: 05 Apr 2008 Posts: 478 Status: Offline |
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 Posted 21st Sep 2012 at 04:11
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daveyboy
aka Jim Davey  Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #2
The standard cams are designed for hydraulic lifters. ________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 21st Sep 2012 at 07:41
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pete_rallye
Seasoned Pro  Location: Yorkshire Registered: 12 Dec 2002 Posts: 5,253 Status: Offline |
Post #3
Generally mechanical cams have a lesser down slope so the loads on the valves aren't as harsh. The hydraulic buckets act like a little shock, so they absorb some of the impact of the valves closing, but this can also cause erratic valve behavior at higher rpm, hence why the change to mechanical buckets is required. I imagine the cams themselves aren't too dissimilar, its more like the operating conditions that determine whether you should change to mechanical buckets or not. ________________________________________ Oulton Park in a BTCC 306 vid 1Oulton Park in a BTCC 306 vid 2 Lap of the 'ring |
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Posted 21st Sep 2012 at 07:47
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welshpug!
Capt Pedantic  Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,871 Status: Offline |
Post #4
Usually you can't use hydraulics on solid or vice versa.________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 21st Sep 2012 at 10:36
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,769 Status: Offline |
Post #5
welshpug! wrote: Usually you can't use hydraulics on solid or vice versa. Really? As my rev limit is 8k, I was told if I wanted to up that and regularly go over 8k then I would need to change to solid tappets, still utilising the standard cams which have been designed for hydraulics...  ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone  |
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Posted 21st Sep 2012 at 10:59
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speedo306
Regular Location: Trinidad & Tobago Registered: 05 Apr 2008 Posts: 478 Status: Offline |
Post #6
Where can I get solid tappets? and do these look like  ________________________________________ RJ |
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Posted 21st Sep 2012 at 11:05
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welshpug!
Capt Pedantic Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,871 Status: Offline |
Post #7
solid tappet shop http://www.pipercams.co.uk/pipercams/www/index.php ________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 21st Sep 2012 at 11:08
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daveyboy
aka Jim Davey Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #8
speedo306 wrote: Where can I get solid tappets? and do these look like Why do you feel you need them? ________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 21st Sep 2012 at 11:35
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speedo306
Regular Location: Trinidad & Tobago Registered: 05 Apr 2008 Posts: 478 Status: Offline |
Post #9
i need the 6 to go faster i do not want to super charge or turbo________________________________________ RJ |
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Posted 21st Sep 2012 at 11:43
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owain
Seasoned Pro  Location: Essex Registered: 20 May 2009 Posts: 9,185 Status: Offline |
Post #10
speedo306 wrote: i need the 6 to go faster i do not want to super charge or turbo Ah. I suspect you're about to hear some people's opinions on this statement. ________________________________________ Membership expiring soon, get in contact on our new little forum project. |
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Posted 21st Sep 2012 at 11:46
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dangti6
aka JKshooter  Location: Taunton, Somerset Registered: 15 Jun 2006 Posts: 10,308 Status: Offline |
Post #11
How about a different engine then.________________________________________  |
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Posted 21st Sep 2012 at 11:50
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speedo306
Regular Location: Trinidad & Tobago Registered: 05 Apr 2008 Posts: 478 Status: Offline |
Post #12
just looking for about 200+ bhp________________________________________ RJ |
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Posted 21st Sep 2012 at 11:52
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speedo306
Regular Location: Trinidad & Tobago Registered: 05 Apr 2008 Posts: 478 Status: Offline |
Post #13
like________________________________________ RJ |
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Posted 21st Sep 2012 at 11:53
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daveyboy
aka Jim Davey Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #14
What cams are you looking at getting? I ask because as mentioned they are designed specifically to run with one type of lifter or the other. You realise there will be a significant extra cost involved in buying then machining shims to fit to solid lifters to give the exact valve clearances required? (Something that is done automatically with hydraulic lifters)________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 21st Sep 2012 at 11:57
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welshpug!
Capt Pedantic Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,871 Status: Offline |
Post #15
throttle bodies, modified/forged pistons, PH2's or BP285H's will get you near 200 (not sure if 285H's will go in a modified std piston though...)________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 21st Sep 2012 at 12:01
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,769 Status: Offline |
Post #16
To get 200bhp+ you don't need to change the lifters...cams and throttle bodies with aftermarket management will do it. ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 21st Sep 2012 at 16:45
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daveyboy
aka Jim Davey Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #17
stan_306gti6 wrote: To get 200bhp+ you don't need to change the lifters...cams and throttle bodies with aftermarket management will do it. Yes, but depends on the cams he buys, if he already has a solid lifter spec cam in mind then he may need to change his plans. ________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 21st Sep 2012 at 17:01
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welshpug!
Capt Pedantic Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,871 Status: Offline |
Post #18
a solid lifter cam will more often than not have too much lift for std or even modified pistons.________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 21st Sep 2012 at 17:13
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daveyboy
aka Jim Davey Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #19
^ I know, but I think the OP needs to sit down and plan his build so the parts compliment each other and are compatible. He's going to open a whole can of worms if he just runs out and buys cams, buckets, shims and pulleys from four different places and none of its going to help if he doesn't start with a plan. Sort the bottom end first to prepare it for better cams with higher lift. Or else it will be a wasted effort.________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 21st Sep 2012 at 18:59
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,769 Status: Offline |
Post #20
To be fair Jim, he could buy a set of PT81's, add some throttle bodies and reach the desired target figure.  That way, there would be no need to mess with the bottom end or the lifters.  ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 21st Sep 2012 at 19:06
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daveyboy
aka Jim Davey Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #21
We all know how close the valves run on standard cams, add lift and duration without doing the necessary bottom end work is at best going to rob you of power, (retarded cams to clear pistons don't make max power) or at worse smash the valves. I personally wouldn't bother messing with cams on a standard bottom end, it's just not worth the risk. Just my tuppence worth though.________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 21st Sep 2012 at 19:14
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,769 Status: Offline |
Post #22
You have a point. If the OP is looking at out and out max power he can achieve then machined pistons at the very least are what is going to be required if a cam change is on the cards. ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 21st Sep 2012 at 19:21
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