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displaying posts 1 to 25 of 46
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| Author | Subject: Low comp GTI6 |
 spiky
Seasoned Pro  Location: Cardiff Registered: 13 Oct 2006 Posts: 2,310 Status: Offline |
Post #1
okusing std engine, are there readily availble low comp pistons that i can put on GTI6 rods? or will i need new rods too? looking to get 8:1 ration for turbo conversion.  ________________________________________ Do you need a 205 > 306 gti6 plug and go engine loom? PM METORQUES for all your braided fuel line needs MY YouTube Videos' SUPERCHARGED 205 GTI6.... are you Fooking nuts!.... ummmm YIP  268+BHP and 860kg = FUN |
 Posted 9th Jun 2010 at 19:26
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bobdylan_55
Seasoned Pro  Location: derby Registered: 28 Mar 2009 Posts: 1,466 Status: Offline |
Post #2
changing rods can be a pain in arse so would be easier to find some pistons that have the right size rod straight away. as said, xu10j2te pistons have a big dish to lower the compression and use same length (iirc) con rods. These give 8:1 iirc. ________________________________________ 309 GTi6-T |
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Posted 9th Jun 2010 at 19:44
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spiky
Seasoned Pro Location: Cardiff Registered: 13 Oct 2006 Posts: 2,310 Status: Offline |
Post #3
so s16 pistons and rod? will 8:1 ? seems to easy?not using a decomp plate? ________________________________________ Do you need a 205 > 306 gti6 plug and go engine loom? PM METORQUES for all your braided fuel line needs MY YouTube Videos' SUPERCHARGED 205 GTI6.... are you Fooking nuts!.... ummmm YIP 268+BHP and 860kg = FUN |
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Posted 9th Jun 2010 at 19:47
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bobdylan_55
Seasoned Pro Location: derby Registered: 28 Mar 2009 Posts: 1,466 Status: Offline |
Post #4
no not s16 pistons, 2.0 8v turbo from a 406. it is easy, the hard bit is fabricating a turbo onto it... although you might want to find out if the 16v heads valves will clear the turbo pistons as they have no valve cut outs. im not sure if it will or not, never tried it ________________________________________ 309 GTi6-T |
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Posted 9th Jun 2010 at 19:54
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rallyestyle
Seasoned Pro  Location: London Registered: 23 Jul 2003 Posts: 14,990 Status: Offline |
Post #5
Might as well go custom rods and pistons so you can safely crank up the boost  ________________________________________ Just Drive It |
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Posted 9th Jun 2010 at 20:15
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bobdylan_55
Seasoned Pro Location: derby Registered: 28 Mar 2009 Posts: 1,466 Status: Offline |
Post #6
depends on budget though mate. custom rods and pistons are �900+ in some cases. where as my s16 and a decompression plate cost me �200 total. If your planning on running more than 20psi boost its probably worth it though. ________________________________________ 309 GTi6-T |
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Posted 9th Jun 2010 at 21:45
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rallyestyle
Seasoned Pro Location: London Registered: 23 Jul 2003 Posts: 14,990 Status: Offline |
Post #7
Trur true. I would just think the temptation to up the boost would be too high  ________________________________________ Just Drive It |
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Posted 9th Jun 2010 at 21:55
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jarrus464
Junior User Location: Great Wyrley, Walsall Registered: 14 May 2007 Posts: 92 Status: Offline |
Post #8
wossner do some 8:1 pistons for the gti6, probably the best way to go i reckon, and from what I can find, (using rich w as an example) then they will fit on the gti6 rods |
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Posted 9th Jun 2010 at 23:34
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spiky
Seasoned Pro Location: Cardiff Registered: 13 Oct 2006 Posts: 2,310 Status: Offline |
Post #9
i will want up to around 20-22 eventually, as above, you always want more....lol but i have to be realistic and that its fwd and traction will be an issueif there is a cheap (cheaper than 1k for low comp) option then i would do it at the same time, rather then run high comp, then later to low comp and then have to buy a new turbo and mapping again ________________________________________ Do you need a 205 > 306 gti6 plug and go engine loom? PM METORQUES for all your braided fuel line needs MY YouTube Videos' SUPERCHARGED 205 GTI6.... are you Fooking nuts!.... ummmm YIP 268+BHP and 860kg = FUN |
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Posted 9th Jun 2010 at 23:36
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bobdylan_55
Seasoned Pro Location: derby Registered: 28 Mar 2009 Posts: 1,466 Status: Offline |
Post #10
for under a grand you could get rods and pistons forged in low comp version... but this wouldnt include the cost for the remainder of the conversion. ________________________________________ 309 GTi6-T |
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Posted 9th Jun 2010 at 23:39
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allanallen
Seasoned Pro Location: Buxton Registered: 01 May 2007 Posts: 1,399 Status: Offline |
Post #11
Just to add there are 2 different types of 8v turbo pistons. One is dished and the other is a flat top iirc. I think the low compression on the 8v's is achieved by large bowls in the head rather than the pistons. There was a fairly good topic on drivers about it a while back. I'm interested in the c.r of a standard rs engine fitted with s16 pistons though if anyone knows? ________________________________________ www.bridgecraftmotorsport.co.uk |
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Posted 9th Jun 2010 at 23:42
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matt h 306
Regular  Location: Wiltshire Registered: 22 Sep 2003 Posts: 350 Status: Offline |
Post #12
Turbo now is it? Is that to keep the noise down or for POWER. |
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Posted 10th Jun 2010 at 00:18
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spiky
Seasoned Pro Location: Cardiff Registered: 13 Oct 2006 Posts: 2,310 Status: Offline |
Post #13
sc or turbo, both same noise wise, give or take,to get SC i need over 2k close to 3k for second hand and thats 240bhp i'm hoping to sell ITBs and inject more funds up to around 2k'ish (total), and i'd hope to get around 300-350  just the Low comp and Ex manifold are the parts that are causing me a headache (costs) ________________________________________ Do you need a 205 > 306 gti6 plug and go engine loom? PM METORQUES for all your braided fuel line needs MY YouTube Videos' SUPERCHARGED 205 GTI6.... are you Fooking nuts!.... ummmm YIP 268+BHP and 860kg = FUN |
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Posted 10th Jun 2010 at 00:22
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peder_306
Regular Location: Gothenburg Registered: 23 May 2009 Posts: 131 Status: Offline |
Post #14
take the XU10J2 pistons and take of like 2mm.Samething for mi16, take the pistons from xu9jaz ( 205 gti ) and take of 2mm on the piston. ________________________________________ Peugeot 306 Dimma Coupé. |
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Posted 10th Jun 2010 at 00:22
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sosmotorsport
Regular Location: falkirk Registered: 24 Jun 2009 Posts: 339 Status: Offline |
Post #15
flat top piston 8v turbo bottom end & gti-6 head 100% works ________________________________________ SOS Motorsportwww.sosmotorsport.co.uk 450bhp 205 16v Turbo www.facebook.com/pages/SOS-Motorsport/159917677353556 |
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Posted 10th Jun 2010 at 00:25
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gti-dan
Regular  Location: Yorkshire Registered: 03 Jan 2010 Posts: 461 Status: Offline |
Post #16
is it not difficult fitting forged pistons to standard pins - something about a floating pin or something? |
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Posted 10th Jun 2010 at 00:28
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spiky
Seasoned Pro Location: Cardiff Registered: 13 Oct 2006 Posts: 2,310 Status: Offline |
Post #17
soundsofsilence wrote: flat top piston 8v turbo bottom end & gti-6 head 100% works what year 8v turbo? and mods needed to bottom end then? any idea on CR with these two mated? glad you posted, was going to grab you on msn and have a chat ________________________________________ Do you need a 205 > 306 gti6 plug and go engine loom? PM METORQUES for all your braided fuel line needs MY YouTube Videos' SUPERCHARGED 205 GTI6.... are you Fooking nuts!.... ummmm YIP 268+BHP and 860kg = FUN |
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Posted 10th Jun 2010 at 00:32
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matt h 306
Regular Location: Wiltshire Registered: 22 Sep 2003 Posts: 350 Status: Offline |
Post #18
spiky wrote: sc or turbo, both same noise wise, give or take, to get SC i need over 2k close to 3k for second hand and thats 240bhp i'm hoping to sell ITBs and inject more funds up to around 2k'ish (total), and i'd hope to get around 300-350 just the Low comp and Ex manifold are the parts that are causing me a headache (costs) Is that still on the Dta? Sounds like a good plan, 350bhp would be mental in your 205. |
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Posted 10th Jun 2010 at 00:49
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allanallen
Seasoned Pro Location: Buxton Registered: 01 May 2007 Posts: 1,399 Status: Offline |
Post #19
peder_306 wrote: take the XU10J2 pistons and take of like 2mm. Samething for mi16, take the pistons from xu9jaz ( 205 gti ) and take of 2mm on the piston. Any ideas on the compression ratios this would give you and do the pistons still need pocketing for valve clearance? ________________________________________ www.bridgecraftmotorsport.co.uk |
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Posted 10th Jun 2010 at 00:51
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sosmotorsport
Regular Location: falkirk Registered: 24 Jun 2009 Posts: 339 Status: Offline |
Post #20
spiky wrote: soundsofsilence wrote: flat top piston 8v turbo bottom end & gti-6 head 100% works what year 8v turbo? and mods needed to bottom end then? any idea on CR with these two mated? glad you posted, was going to grab you on msn and have a chat  an early turbo engine like a xm etcthe head bolts straight on would atleast use new rings , bearings water & oil pumps tho and arp bottom end rod bolts other than that away you go cr should be around your 8-1 ________________________________________ SOS Motorsportwww.sosmotorsport.co.uk 450bhp 205 16v Turbo www.facebook.com/pages/SOS-Motorsport/159917677353556 |
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Posted 10th Jun 2010 at 00:55
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peder_306
Regular Location: Gothenburg Registered: 23 May 2009 Posts: 131 Status: Offline |
Post #21
It will be around 8ish, not sure of the numbers but it will hold as long as you got the proper mixture.No need for pocketing ________________________________________ Peugeot 306 Dimma Coupé. |
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Posted 10th Jun 2010 at 00:57
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spiky
Seasoned Pro Location: Cardiff Registered: 13 Oct 2006 Posts: 2,310 Status: Offline |
Post #22
this seems like a nice cheaper optionand readily avaible do you know which yeah car i need to get an engine from? ________________________________________ Do you need a 205 > 306 gti6 plug and go engine loom? PM METORQUES for all your braided fuel line needs MY YouTube Videos' SUPERCHARGED 205 GTI6.... are you Fooking nuts!.... ummmm YIP 268+BHP and 860kg = FUN |
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Posted 10th Jun 2010 at 01:05
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spiky
Seasoned Pro Location: Cardiff Registered: 13 Oct 2006 Posts: 2,310 Status: Offline |
Post #23
soundsofsilence wrote: spiky wrote: soundsofsilence wrote: flat top piston 8v turbo bottom end & gti-6 head 100% works what year 8v turbo? and mods needed to bottom end then? any idea on CR with these two mated? glad you posted, was going to grab you on msn and have a chat an early turbo engine like a xm etcthe head bolts straight on would atleast use new rings , bearings water & oil pumps tho and arp bottom end rod bolts other than that away you go cr should be around your 8-1 cheers dude, great info also thanks to evryone for the info, keep it coming next on the list is the ex manifold other than the DP one? ________________________________________ Do you need a 205 > 306 gti6 plug and go engine loom? PM METORQUES for all your braided fuel line needs MY YouTube Videos' SUPERCHARGED 205 GTI6.... are you Fooking nuts!.... ummmm YIP 268+BHP and 860kg = FUN |
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Posted 10th Jun 2010 at 01:07
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peder_306
Regular Location: Gothenburg Registered: 23 May 2009 Posts: 131 Status: Offline |
Post #24
spiky wrote: this seems like a nice cheaper option and readily avaible do you know which yeah car i need to get an engine from? 405/605/306/(406 122hp ________________________________________ Peugeot 306 Dimma Coupé. |
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Posted 10th Jun 2010 at 01:21
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spiky
Seasoned Pro Location: Cardiff Registered: 13 Oct 2006 Posts: 2,310 Status: Offline |
Post #25
plenty of chioce then________________________________________ Do you need a 205 > 306 gti6 plug and go engine loom? PM METORQUES for all your braided fuel line needs MY YouTube Videos' SUPERCHARGED 205 GTI6.... are you Fooking nuts!.... ummmm YIP 268+BHP and 860kg = FUN |
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Posted 10th Jun 2010 at 01:25
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