Would a 1.5mm HeadGasket on an unskimmed VTS head cause any issues??

1. AntscVTR Infrequent Poster Joined: Aug 2012 Lancs Posts: 187 99 VTS

   #1 18th March 2014, 17:36

   Hi there I have decided to replace the head gasket on my VTS seeing as I'm going to be stripping the head to reseal the cam covers and I found this head rebuild kit on ebay.
   
   http://www.ebay.co.uk/itm/SAXO-VTS-1...item485c9319e4
   
   The Gasket is 1.50mm but as far as I'm aware the standard one is 1.30mm. Am I able to fit this to an skimmed head? Sorry if this is a stupid question I'm just unsure if it would affect the compression ratio.
   
   Also does anybody know where I can buy the center bearing for the steering rack?
   
   Thanks a lot.
2. AntscVTR Infrequent Poster Joined: Aug 2012 Lancs Posts: 187 99 VTS

   #2 18th March 2014, 17:39

   Am I able to fit this to an UNskimmed head
   
   Typo error in OP.
3. blackie_2k5 Saxperience Hardcore! Joined: Oct 2008 Birtley Posts: 22253 VTR Turbo, 106 xsi track slag, Transit recovery, B

   #3 18th March 2014, 19:40

   if youre lifting the head and its not been off in a while youd be daft not to skim it

   1 user thanked this post: AntscVTR
4. AntscVTR Infrequent Poster Joined: Aug 2012 Lancs Posts: 187 99 VTS

   #4 18th March 2014, 23:18

   Quote:

   Originally Posted by blackie_2k5 if youre lifting the head and its not been off in a while youd be daft not to skim it

   Good call I will be doing that now. I found out that 1.50 is standard size so I'll get a 1.70 from GMC after the heads been skimmed. Thanks
5. Alfie09 Frequent Poster Joined: Feb 2013 Posts: 579

   #5 19th March 2014, 21:16

   Using a standard gasket after a light skim won't cause any issues.
   
   Infact on certain engines it's the done thing as it raises the compression slightly

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6. user_57064 Established Member Joined: Jan 2012 south essex!! Posts: 2442 posi blue vtrs race car

   #6 19th March 2014, 22:00

   Im running high lift cams on a 0.7 gasket... I dont advise it because on 95 fuel it retards the ignition so much because of knock its flat as shit on std management...
7. AntscVTR Infrequent Poster Joined: Aug 2012 Lancs Posts: 187 99 VTS

   #7 20th March 2014, 13:19

   Quote:

   Originally Posted by Alfie09 Using a standard gasket after a light skim won't cause any issues. Infact on certain engines it's the done thing as it raises the compression slightly

   Thanks for the advice I'm pretty sure the head gasket is alright as it is so a light skimming is all that should be needed.
   
   

   Quote:

   Originally Posted by greyjasper51 Im running high lift cams on a 0.7 gasket... I dont advise it because on 95 fuel it retards the ignition so much because of knock its flat as shit on std management...

   Are you on a 0.70mm gasket jasper not a 1.70mm or a +0.70mm? If on a 1.70mm did you get the head skimmed 0.20mm before fitting it? I'm new to head gaskets so I'm trying to learn as much info especially on the compression side as I can.
   
   Thanks again Saxp very helpful as usual.
8. user_57064 Established Member Joined: Jan 2012 south essex!! Posts: 2442 posi blue vtrs race car

   #8 20th March 2014, 23:15

   Its a 0.7mm off the jp4 c2 engine and it had 0.01" skimmed from a std head...
   
   
   Just fit a std 1.3mm head gasket amd stop over complicating it... Use a mls one and get it skimmed until flat... Mine went flat at 0.004" that is within a manufacturers tollerance so dont worry
   
   If your worried about the cr that much taking 0.02" off the head will change the combustion chamber of the head slightly (on paper) so just put a std one back

   1 user thanked this post: AntscVTR
9. AntscVTR Infrequent Poster Joined: Aug 2012 Lancs Posts: 187 99 VTS

   #9 21st March 2014, 00:23

   Quote:

   Originally Posted by greyjasper51 Its a 0.7mm off the jp4 c2 engine and it had 0.01" skimmed from a std head... Just fit a std 1.3mm head gasket amd stop over complicating it... Use a mls one and get it skimmed until flat... Mine went flat at 0.004" that is within a manufacturers tollerance so dont worry If your worried about the cr that much taking 0.02" off the head will change the combustion chamber of the head slightly (on paper) so just put a std one back

   Thanks a lot Jasper
10. yr51ocw Frequent Poster Joined: Oct 2005 Posts: 751

    #10 21st March 2014, 15:10

    Quote:

    Originally Posted by greyjasper51 Im running high lift cams on a 0.7 gasket... I dont advise it because on 95 fuel it retards the ignition so much because of knock its flat as shit on std management...

    what speeds and loads are you knock limited at? Whats your ignition timing at peak power? Im running 11.0:1 CR with J4 cams and am only knock limited at low speed WOT
11. user_57064 Established Member Joined: Jan 2012 south essex!! Posts: 2442 posi blue vtrs race car

    #11 21st March 2014, 15:34

    Quote:

    Originally Posted by yr51ocw what speeds and loads are you knock limited at? Whats your ignition timing at peak power? Im running 11.0:1 CR with J4 cams and am only knock limited at low speed WOT

    
    That was std management not the predator im running now, also it was 95 then and i mapped on 99 (momentum) now off the top of my head 32 degrees @ 5k-8k give or take 500 rpm