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Author Subject: Max lift at TDC?
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,799

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Post #76
Were you on stock or aftermarket pistons?

I'd imagine it was 1.4mm or more if it was a repair gasket, maybe even 1.6?

part number for that is 209 V4, but servicebox doesn't show the thickness Sad (I'm sure sandy knows anyway given he recommended!) not cheap compared to off the shelf gaskets!

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Posted 3rd Aug 2010 at 21:44
rallyeash

Seasoned Pro

Location: Devizes

Registered: 11 Dec 2006

Posts: 4,424

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Post #77
omega pistons

yes just found the old email. oversize XU7 J4 gasket, 0209 v4. circa 50 iirc

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Posted 3rd Aug 2010 at 21:58
joevts

Senior User

Location: barnsley

Registered: 21 May 2008

Posts: 608

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Post #78
for some reason i'm pretty sure the repair gaskets are 2.0mm, dunno where i got that from but i swear i didn't just make it up or hear it from some bloke down the pub LOL
Posted 4th Aug 2010 at 00:16
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,799

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Post #79
not for a pug, seeing as the heads can;t be skimmed that much the stock are circa 1.2mm or so, repair 1.4 or thereabouts.

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Posted 4th Aug 2010 at 00:19
gti-dan

Regular

Location: Yorkshire

Registered: 03 Jan 2010

Posts: 461

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Post #80
where you up to welshpug? Are you building it back up yourself? who is mapping? is it in yet? what cams are you using?
Posted 4th Aug 2010 at 03:18
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,799

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Post #81
mine is all in one piece and running fine, apart from the pistons as mentioend I did it all myself.

Just a PH2 inlet cam, idles like a stock engine! as yet I'm not going to get it remapped, but will try and get it RR'd to make sure its not running lean, I would in future like to get a proper mappable ecu on there like a DTA S40 or similar.

not MOT'd or driven any further than ¼ of a mile yet I'm afraid, I have another car as a daily at the moment that I need to sell before I can afford to finish it properly.

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 4th Aug 2010 at 03:27
spiky

Seasoned Pro

Location: Cardiff

Registered: 13 Oct 2006

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Post #82
Sorry to drag this up, does anyone have a rough idea how much would need to be machined off the pistons to get enough clearance, ( pockets)

Thanks

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Posted 16th Mar 2011 at 01:32
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,799

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Post #83
not specifically myself, you'd need to ask martin or colin or sandy Smile

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Posted 16th Mar 2011 at 01:34
allanallen

Seasoned Pro

Location: Buxton

Registered: 01 May 2007

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Post #84
spiky wrote:
Sorry to drag this up, does anyone have a rough idea how much would need to be machined off the pistons to get enough clearance, ( pockets)

Thanks


Enough clearance for what? Any thing specific?

My pockets are are 1mm deeper than standard (same as welshpugs) and the heads had a 0.25mm skim. I'm currently running 1.3mm of lift at TDC. I'd be fairly confident running 2mm at TDC to be honest but I'm only on standard cams.

I don't think you'd want to go much deeper than 1mm on RS pistons.

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Posted 16th Mar 2011 at 02:07
discostu

Newbie

Location: cwmbran

Registered: 07 Sep 2008

Posts: 13

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Post #85
Hi, Spiky was replying to this thread on my behalf.. so thanks to him for that.

The situation is: i currently have my engine stripped down and also have acquired a pair of pt81's. Whilst the engine is in pieces i thought it best to get the pistons machined to insure valve/piston clearance.

i am currently trying to research (or work out myself) how much needs to be machined. All replies are welcome, thanks Smile
Posted 16th Mar 2011 at 02:58
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,799

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Post #86
why not just send them to martin or colin? both are jigged up ready and have done all the calcs and checks already.

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Posted 16th Mar 2011 at 03:33
discostu

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Location: cwmbran

Registered: 07 Sep 2008

Posts: 13

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Post #87
Fair comment Smile how is it best to contact either?

How are things with u welshpug, long time no spk. Building or driving anything exciting?
Posted 16th Mar 2011 at 03:39
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,799

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Post #88
Martin by PM on here, username is CRF 450, or Colin is probably easiest to find via Sandy on the 205 forum!

at the moment been racking up the miles on my bike since new year after having my ZX bent by a micra Sad should be getting that straightened out soon then going to fit a DTA then if I can find one I want one of colins inlets Smile

205 has been sat neglected for a bit Sad

You still around Cwmbran?

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need a part number? get on here - http://public.servicebox.peugeot.com

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Posted 16th Mar 2011 at 03:52
discostu

Newbie

Location: cwmbran

Registered: 07 Sep 2008

Posts: 13

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Post #89
Thanks i'll PM him tomorrow once i have collected my head.

Yes still living in Cwmbran, in Oakfield... not too far from the chinese takeaway and the pub, perfect lol
Posted 16th Mar 2011 at 04:21
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,799

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Post #90
Thought I'd add the Catcams figures for their fast road cams:

4903106
duration @ [0.1mm+cl] 267 / 259°
duration @ [1.0mm+cl] 228 / 224°
Peak lift 10.95 / 10.40mm
Lift @ TDC 1.25 / 1.05mm

Seem to have been thought out to work in a standard engine, though without seeing the curve of the profile its hard to compare properly, but they should give similar results to PT81's etc.

Though having spoken to Sandy about cams I'd be using Piper or Newmans, he wasn't keen on how catcams design their ramp angles etc with regards to component life as he has had issues withthem.

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 29th Apr 2012 at 21:23
spiky

Seasoned Pro

Location: Cardiff

Registered: 13 Oct 2006

Posts: 2,310

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Post #91
Would be nice to know if they will fit to abstain pocketed pistons Smile

________________________________________

Do you need a 205 > 306 gti6 plug and go engine loom? PM ME

TORQUES for all your braided fuel line needs

MY YouTube Videos'

SUPERCHARGED 205 GTI6.... are you Fooking nuts!.... ummmm YIP Smile

268+BHP and 860kg = FUN
Posted 29th Apr 2012 at 21:24
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,799

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Post #92
I would think they should be ok as long as the head had not been skimmed, or if it had that the seats were cut back.

They're the cams that pug1off are using in standard engines for their "195" conversion.

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need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 29th Apr 2012 at 21:28
matty_rallye

Senior User

Location: Devizes

Registered: 28 Oct 2005

Posts: 966

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Post #93
welshpug! wrote:
Though having spoken to Sandy about cams I'd be using Piper or Newmans, he wasn't keen on how catcams design their ramp angles etc with regards to component life as he has had issues withthem.


Yes Worn lobes on my Catcams after a few thousand miles!

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2.1 16v 306 Rallye.
Posted 29th Apr 2012 at 21:39
daveyboy

aka Jim Davey

Location: Southampton

Registered: 01 Oct 2007

Posts: 8,648

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Post #94
matty_rallye wrote:
welshpug! wrote:
Though having spoken to Sandy about cams I'd be using Piper or Newmans, he wasn't keen on how catcams design their ramp angles etc with regards to component life as he has had issues withthem.


Yes Worn lobes on my Catcams after a few thousand miles!


Surely thats down to poor bedding in procedure or insufficient cam lube on initial startup? Were they used lifters on a new cam? As thats a massive no-no.

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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
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Posted 30th Apr 2012 at 18:12
daveyboy

aka Jim Davey

Location: Southampton

Registered: 01 Oct 2007

Posts: 8,648

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Post #95
welshpug! wrote:
mine is all in one piece and running fine, apart from the pistons as mentioend I did it all myself.

Just a PH2 inlet cam, idles like a stock engine! as yet I'm not going to get it remapped, but will try and get it RR'd to make sure its not running lean, I would in future like to get a proper mappable ecu on there like a DTA S40 or similar.

not MOT'd or driven any further than ¼ of a mile yet I'm afraid, I have another car as a daily at the moment that I need to sell before I can afford to finish it properly.


"I live my life a 1/4 mile at a time" Laugh my ass off

________________________________________

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
Posted 30th Apr 2012 at 18:15
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,799

Status: Offline

Post #96
daveyboy wrote:
"I live my life a 1/4 mile at a time" Laugh my ass off



Laugh my ass off the car's done 6k miles and been bent a bit a few times since then Doh

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 30th Apr 2012 at 19:19
paulvancraen

Junior User

Location: Breda

Registered: 24 Jun 2009

Posts: 83

Status: Offline

Post #97
Did you pocket the RFY or the RFS pistons in your build Welshpug? And how deep did you pocket them?


Paul
Posted 2nd May 2012 at 12:51
allanallen

Seasoned Pro

Location: Buxton

Registered: 01 May 2007

Posts: 1,399

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Post #98
paulvancraen wrote:
Did you pocket the RFY or the RFS pistons in your build Welshpug? And how deep did you pocket them?


Paul


RFS pistons with the pockets machined 1mm deeper. You can't go much deeper as RFS piston crowns are very thin.

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Posted 2nd May 2012 at 13:22
paulvancraen

Junior User

Location: Breda

Registered: 24 Jun 2009

Posts: 83

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Post #99
How about RFY pistons? Are they thicker?

I'm thinking about using the complete RFY bottom end and pocket these pistons. Then slap the RS head on it Smile
Posted 2nd May 2012 at 14:03
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,799

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Post #100
RFY would not need the pockets modifying at all, they are much deeper, however they are a fair bit heavier and the rods are shorter on them meaning a sharper angle mid stroke.

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need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 3rd May 2012 at 18:00

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