2 prong head?

1. jonnyb2b Regular Poster Joined: Feb 2011 Milton Keynes aka Milk & Beans Posts: 320 Citroen Saxo VTS

   #1 4th May 2011, 22:41

   Seen a few ppl sayin bout these head's an they flow betta etc! Proper amature question but how do you know if ur vts has this head, age, engine no etc?
   
   Cheers
   
   Jon
2. user_38811 Saxperience Forum Bum Joined: Nov 2009 Sawtry Posts: 3456 Saxo VTS Saxo VTR

   #2 4th May 2011, 22:47

   It's only on engines that were prdocued during 1999-2000 VTS's, so the crossover year car's
   
   (I'm sure someone will correct me if i'm wrong)
   
   I've got a 2 prong engine in my car and a 2 prong engine sitting in my garage
3. jonnyb2b Regular Poster Joined: Feb 2011 Milton Keynes aka Milk & Beans Posts: 320 Citroen Saxo VTS

   #3 4th May 2011, 22:51

   Cheers Lee, an they really feel more spritly or react better to cams, mani an exhaust etc or u not really notice the diff!?
   
   Cheers
   
   Jon
4. user_38811 Saxperience Forum Bum Joined: Nov 2009 Sawtry Posts: 3456 Saxo VTS Saxo VTR

   #4 4th May 2011, 22:54

   Quote:

   Originally Posted by jonnyb2b Cheers Lee, an they really feel more spritly or react better to cams, mani an exhaust etc or u not really notice the diff!? Cheers Jon

   Yeh they do feel like they have a lot of spirit in them as my old 2 prong engine used to keep up with 182's/ 172's etc with just BMC and Supersprint 4-2-1 manifold
5. jonnyb2b Regular Poster Joined: Feb 2011 Milton Keynes aka Milk & Beans Posts: 320 Citroen Saxo VTS

   #5 4th May 2011, 23:01

   Ball ache, so would 2 prong head bolt onto a newer block etc or is there anythin that can be done to a later head to improve things, removal of egr etc!?
   
   Cheers
   Jon
6. kristel10589 Saxperience Post Whore Joined: Feb 2007 Posts: 5362

   #6 4th May 2011, 23:03

   LOL, two prong head refers to the engines that have the air pump fitted, its the mounts thats it fitted to. So all mk2 engines have them.
   
   I don't know if they any better or not, doubt it's better due to two metal brackets sticking out the head.
7. user_15516 Saxperience Post Whore Joined: Apr 2007 Posts: 6640 Integra DC5R & VTS

   #7 4th May 2011, 23:04

   They flow better, but surely it doesn't warrant swapping heads. Removing the fresh air pump does bugger all bar shedding a little bit of weight.
   
   If you're going to that length, you might as well fit a TU5JP4 head and take advantage of the larger valves.
8. kristel10589 Saxperience Post Whore Joined: Feb 2007 Posts: 5362

   #8 4th May 2011, 23:04

   Quote:

   Originally Posted by jonnyb2b Ball ache, so would 2 prong head bolt onto a newer block etc or is there anythin that can be done to a later head to improve things, removal of egr etc!? Cheers Jon

   They are the newer head, if you remove your 'egr' valve, its that mount they refer to as two prong LOLz.
9. user_38811 Saxperience Forum Bum Joined: Nov 2009 Sawtry Posts: 3456 Saxo VTS Saxo VTR

   #9 4th May 2011, 23:05

   Quote:

   Originally Posted by jonnyb2b Ball ache, so would 2 prong head bolt onto a newer block etc or is there anythin that can be done to a later head to improve things, removal of egr etc!? Cheers Jon

   I'm not sure mate, i think it can be a bolt-on mate
10. user_15516 Saxperience Post Whore Joined: Apr 2007 Posts: 6640 Integra DC5R & VTS

    #10 4th May 2011, 23:06

    Quote:

    Originally Posted by kristel10589 They are the newer head, if you remove your 'egr' valve, its that mount they refer to as two prong LOLz.

    The 'two prong' head refers to engines which have those two mounting prongs, but don't have the fresh air pump setup - i.e. those made in 1999 - 2000, IIRC.
    
    The fresh air pump wasn't fitted until 2001 and onwards - the heads on these engines don't flow as well, apparently.

    1 user thanked this post: raunchz
11. kristel10589 Saxperience Post Whore Joined: Feb 2007 Posts: 5362

    #11 4th May 2011, 23:10

    Quote:

    Originally Posted by LeeumH The 'two prong' head refers to engines which have those two mounting prongs, but don't have the fresh air pump setup - i.e. those made in 1999 - 2000, IIRC. The fresh air pump wasn't fitted until 2001 and onwards - the heads on these engines don't flow as well, apparently.

    bah, any difference is neglible. Best bet is fitting the TU5JP4 like you said.
12. user_15516 Saxperience Post Whore Joined: Apr 2007 Posts: 6640 Integra DC5R & VTS

    #12 4th May 2011, 23:17

    Quote:

    Originally Posted by kristel10589 bah, any difference is neglible. Best bet is fitting the TU5JP4 like you said.

    I've never driven a car with a 'two prong', but I seem to remember they make better results after mapping at Chipwizards than 2001+ VTS', suppose that could be down to the single plug ECU though?
    
    Mine is a 2001+ and I certainly don't loose any sleep over being a few horses down.
13. kristel10589 Saxperience Post Whore Joined: Feb 2007 Posts: 5362

    #13 4th May 2011, 23:27

    Quote:

    Originally Posted by LeeumH I've never driven a car with a 'two prong', but I seem to remember they make better results after mapping at Chipwizards than 2001+ VTS', suppose that could be down to the single plug ECU though? Mine is a 2001+ and I certainly don't loose any sleep over being a few horses down.

    Well, I used to own a 2001+ vts with the air pump thingy, 3 plug ecu, now got a twin prong vts engine in me black car with single plug ecu etc, so will be interesting to see if there a difference on the road, when it gets back on the road lol.
14. jonnyb2b Regular Poster Joined: Feb 2011 Milton Keynes aka Milk & Beans Posts: 320 Citroen Saxo VTS

    #14 4th May 2011, 23:35

    Cheers for the responses, il stick wit jst cam'in this one then an enjoying those gains!
    
    Cheers
    Jon
15. Aaron Saxperience Post Whore Joined: Jan 2008 ..... Posts: 5231 ..............

    #15 5th May 2011, 00:56

    There's always been the myth of the 2 prong special heads. N it is true.
    they flow 6% better than the other heads as Matt @ QEP (now Matt @ Cat Cams UK) flow tested them