S1 and s2 rallye heads

1. Twister Newbie Joined: Mar 2015 Posts: 3

   #1 24th April 2015, 21:44

   Can any one shed some light on what is the difference between a s1 and s2 rallye head ?
2. KamRacing Saxperience Addict Joined: Nov 2006 A farm shed in Aylesbury Posts: 14916 Corolla AE86 Peugeot 205 B18C (in bits)

   #2 25th April 2015, 09:49

   I stand to be corrected but I didnt think there was any significant difference.
3. Gandi699 Saxperience Post Whore Joined: Apr 2011 Posts: 9100 Amazon green VTR 16v, Inferno RS clio 182

   #3 29th April 2015, 12:42

   I am also led to believe the same.
4. axsaxoman Saxperience Forum Bum Joined: Jan 2003 Scotland Posts: 3380

   #4 30th April 2015, 11:46

   not a lot -- there have been 3 different combustion chamber shapes in 8 v heads --only really causes problems when fitting forged lumpy pistons and when you are skiming it a lot to get the comp ratio up
   you cannot get too much comp ratio for n/a on any saxo 8 or 18v engine they love comp up high --ifdet is a problem its your fuelling and igniton not comp ratio
   no piston maker comp ratios are correct --always lowere than they say
   wosner liek a lot of other makers quote comp ratio WITH NO GASKET - up to engine builder then to pick correct size etc once head has been skimmed etc
   hence turbo pistons are always too low really
5. Twister Newbie Joined: Mar 2015 Posts: 3

   #5 1st May 2015, 22:38

   Cheers lads . I've been led to believe they are the same , but the odd person says there different.
   Matt