Skimmed head + ph3's

1. liam_VTR Established Member Joined: Jan 2009 Stoke on trent Posts: 1132 Corsa GSI C20LET

   #1 2nd April 2010, 16:25

   Im interested in upgrading my cams in my VTS ... at the moment i have Kent pt50's (mild cam) and i want the wildest cam i can use on std bottom end and std inlet ...
   
   Was looking at ph4's but they require pocketed pistons so ph3 it is ...
   
   however when my head gasket was done about 2 months ago the guy skimmed my head and then took some more off to up the compression more, he said it wasn't the max, but he had took a fair bit off (i asked for numbers but he cant remember) he said there was still a fair few skims left ... do you reckon i will get away with ph3's or not?
   
   or is there a wild-er (sp) cam i can run? will be getting mapped and im not bothered about low end power or idle
2. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

   #2 2nd April 2010, 16:56

   By the sounds of it, I'd say you'll be very close/too close to time up the PH3's and have a safe valve clearance.
   
   What headgasket did he use? A repair gasket or original thickness gasket?

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3. liam_VTR Established Member Joined: Jan 2009 Stoke on trent Posts: 1132 Corsa GSI C20LET

   #3 2nd April 2010, 17:07

   Quote:

   Originally Posted by raunchz By the sounds of it, I'd say you'll be very close/too close to time up the PH3's and have a safe valve clearance. What headgasket did he use? A repair gasket or original thickness gasket?

   was brought from local motor factory ... it was the best one they did ...
   
   on the invoice it says:
   H/SET CIT/PEU TU5J4 16V 1587CC
   
   i have no idea was the thickness was or the make ...
   
   The cost was £98.50 for the head set ...
4. user_10176 Saxperience Post Whore Joined: Jun 2006 Ramsey st marys, peterborough Posts: 8288 Saxo's, Corsa (Daily)

   #4 2nd April 2010, 17:08

   well my head was skimmed down, and i used ph3 if you go too far then you will not be able to timing them up correctly.
   
   but take to the place you got it machined, they could measure, if they have the data of the standard size!
   
   that what my guy did with my head so i knew what was tkaen off the head before i got the engine
   
   andy

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5. liam_VTR Established Member Joined: Jan 2009 Stoke on trent Posts: 1132 Corsa GSI C20LET

   #5 2nd April 2010, 17:12

   Quote:

   Originally Posted by AndySAXO well my head was skimmed down, and i used ph3 if you go too far then you will not be able to timing them up correctly. but take to the place you got it machined, they could measure, if they have the data of the standard size! that what my guy did with my head so i knew what was tkaen off the head before i got the engine andy

   would that require me to take my head off though?
   
   cheers for help mate
6. frankie Saxperience Addict Joined: Apr 2006 Frome, down deepest, darkest zummerset Posts: 12971 VTRallye

   #6 2nd April 2010, 17:15

   GMC sell a range of thickness headgaskets....
7. user_10176 Saxperience Post Whore Joined: Jun 2006 Ramsey st marys, peterborough Posts: 8288 Saxo's, Corsa (Daily)

   #7 2nd April 2010, 17:16

   Quote:

   Originally Posted by liam_VTR was brought from local motor factory ... it was the best one they did ... on the invoice it says: H/SET CIT/PEU TU5J4 16V 1587CC i have no idea was the thickness was or the make ... The cost was £98.50 for the head set ...

   98 quid for head set, sound expensive! standard size is 1.5mm, the reapir h/g are 1.7mm thick,
   
   should be ok, but always dry run once biult to make sure!!
   
   andy
8. liam_VTR Established Member Joined: Jan 2009 Stoke on trent Posts: 1132 Corsa GSI C20LET

   #8 2nd April 2010, 17:16

   If my heads got to come off again then i would just get another (maybe a jp4) p + p that with some ph3's and then swap them over
9. user_10176 Saxperience Post Whore Joined: Jun 2006 Ramsey st marys, peterborough Posts: 8288 Saxo's, Corsa (Daily)

   #9 2nd April 2010, 17:17

   can get 3 size from motorfactors!
   
   but 1.7mm is the thick from motorfactors i think!
   
   andy
10. liam_VTR Established Member Joined: Jan 2009 Stoke on trent Posts: 1132 Corsa GSI C20LET

    #10 2nd April 2010, 17:18

    Quote:

    Originally Posted by AndySAXO 98 quid for head set, sound expensive! standard size is 1.5mm, the reapir h/g are 1.7mm thick, should be ok, but always dry run once biult to make sure!! andy

    like i said it was the best one they did
    
    they had one for like £30 but i thought theirs no point doing the job twice ...
11. user_10176 Saxperience Post Whore Joined: Jun 2006 Ramsey st marys, peterborough Posts: 8288 Saxo's, Corsa (Daily)

    #11 2nd April 2010, 17:23

    well put the cams in, and timing them up to spec! and dry run it check for any clearances!
    
    andy
12. liam_VTR Established Member Joined: Jan 2009 Stoke on trent Posts: 1132 Corsa GSI C20LET

    #12 2nd April 2010, 17:24

    Quote:

    Originally Posted by AndySAXO well put the cams in, and timing them up to spec! and dry run it check for any clearances! andy

    *goes off to hunt down some ph3's*
13. liam_VTR Established Member Joined: Jan 2009 Stoke on trent Posts: 1132 Corsa GSI C20LET

    #13 2nd April 2010, 17:25

    Also ph3's are the wildest i can use on standard bottom end and standard inlet correct?
14. user_10176 Saxperience Post Whore Joined: Jun 2006 Ramsey st marys, peterborough Posts: 8288 Saxo's, Corsa (Daily)

    #14 2nd April 2010, 17:28

    yes them or 708's are really,
    
    i ran them fine with standard bottom end, and also with bodies.
    
    but ph4 will not be able to timing up correctly as the clearance are not eunf of stnadard pistons!
    
    andy

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15. liam_VTR Established Member Joined: Jan 2009 Stoke on trent Posts: 1132 Corsa GSI C20LET

    #15 2nd April 2010, 17:34

    Quote:

    Originally Posted by AndySAXO yes them or 708's are really, i ran them fine with standard bottom end, and also with bodies. but ph4 will not be able to timing up correctly as the clearance are not eunf of stnadard pistons! andy

    alright mate ... cheers for the help
16. williamsvts Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi

    #16 2nd April 2010, 19:38

    1.5mm clearance with ph3 and standard engine, i very much doubt he will of took over 0.5mm off the head so imo you'll be fine with them. just time them up right.
17. liam_VTR Established Member Joined: Jan 2009 Stoke on trent Posts: 1132 Corsa GSI C20LET

    #17 3rd April 2010, 02:11

    Quote:

    Originally Posted by williamsvts 1.5mm clearance with ph3 and standard engine, i very much doubt he will of took over 0.5mm off the head so imo you'll be fine with them. just time them up right.

    alright mate will do cheers