whisper Posted May 5, 2008 Share Posted May 5, 2008 Hi Guys Will a Mk1 2Liter cylinder head fit a Mk3 GT6 block and run well bearing in mind that the Mk1 has a 9.5-1 compression ratio and the GT6 is 9.25-1.What do you thinkregardschris :P Link to comment Share on other sites More sharing options...
Richard B Posted May 6, 2008 Share Posted May 6, 2008 Interesting idea. Reverse engineering!You would need the modified Chris Witor head studs that 7/16 UNF instead of 3/8 UNF and you would need to drill out the stud holes in the head.Replacement manifolds would be required. I think the MkI head burns cleaner than the MkII head. Link to comment Share on other sites More sharing options...
Deleted User Posted May 6, 2008 Share Posted May 6, 2008 Surely the mk3 head breathes better, hence why you put the mk3 head on the early (breather) block.Or is everything I know about tuning these cars wrong :oCertainly for 2000's you fit the later head to the earlier block as the earlier block is more rev happy, smaller crank journals, more oil pressure etc etc combine that with the improved flow of the later head a decent cam, nice manifolds and get the fuel right and you will see 150-160 bhp at the flywheel easy.Mike Link to comment Share on other sites More sharing options...
James Posted May 6, 2008 Share Posted May 6, 2008 I'm after a good Mk1 head if anyone has one :)The clearances are going to zero after 500 miles the recession is so bad now...So if anyone has one with nice hardened seats etc :) Link to comment Share on other sites More sharing options...
Smallfry Posted May 6, 2008 Share Posted May 6, 2008 No hardened seats..........but there is one here if you want to remove it with YOUR tools. Link to comment Share on other sites More sharing options...
whisper Posted May 7, 2008 Author Share Posted May 7, 2008 Hi MikeIn your note you suggest that the early 2000 Mk1 havesmaller bearing journals is this right for all GT6 engines regardschris Link to comment Share on other sites More sharing options...
Richard B Posted May 7, 2008 Share Posted May 7, 2008 No it's pre-GT6. It's the block with the crancase breather tube by the petrol pump. MB engines not MC.But could be made to fit :-/ Link to comment Share on other sites More sharing options...
heraldcoupe Posted May 8, 2008 Share Posted May 8, 2008 Richard_B wrote:No it's pre-GT6.Some time since I've checked the parts list, but I'm fairly certain the earliest Mk1 GT6s had the small journal crank,Cheers,Bill. Link to comment Share on other sites More sharing options...
Richard B Posted May 8, 2008 Share Posted May 8, 2008 heraldcoupe wrote:Some time since I've checked the parts list, but I'm fairly certain the earliest Mk1 GT6s had the small journal crank,Cheers,Bill.Bloody hell your right :BEarly block fitted up to KC5000E, so that's another reason to have an early GT6 ;) Link to comment Share on other sites More sharing options...
Deleted User Posted May 8, 2008 Share Posted May 8, 2008 Richard_B wrote:Early block fitted up to KC5000E, so that's another reason to have an early GT6 ;)Apart from the fact that spare parts for these engines are virtually unobtainable Link to comment Share on other sites More sharing options...
Deleted User Posted May 8, 2008 Share Posted May 8, 2008 KevinR wrote:Apart from the fact that spare parts for these engines are virtually unobtainableTrue, later engines are much better catered for. You can't get 1600 bits for love nor money, and they made 31,261 of them! Link to comment Share on other sites More sharing options...
heraldcoupe Posted May 8, 2008 Share Posted May 8, 2008 KevinR wrote:Apart from the fact that spare parts for these engines are virtually unobtainableWhich parts? Apart from pistons for the 1600 Vitesse, I didn't think there were any great shortages for the small journal engines.Cheers,Bill. Link to comment Share on other sites More sharing options...
Deleted User Posted May 8, 2008 Share Posted May 8, 2008 Keeping in the context of the MK1 GT6 engine, from KC1E to KC5000E, not the 1600 Vitesse engine.Quote:Direct from the Rimmer Bros website.Engine components for very early Mk1 GT6's (from engine number KC1E to KC5000E), such as cylinder block, crankshaft, main bearings, conrods, conrod bearings, flywheel etc are extremely scarce and NOT generally interchangeable with later Mk1 engines. Link to comment Share on other sites More sharing options...
JohnD Posted May 8, 2008 Share Posted May 8, 2008 whisper wrote:Hi GuysWill a Mk1 2Liter cylinder head fit a Mk3 GT6 block and run well bearing in mind that the Mk1 has a 9.5-1 compression ratio and the GT6 is 9.25-1.What do you thinkregardschris :PIf the Mk3 GT6 has domed pistons - NO WAY!If I have this right, sometime in the life of the MK3, Triumph rationalised their stock and used the same cylinder head for 2500 and 2000 engines. The former had a larger chamber, to keep the CR reasonable with the larger stroke. Without some mod, the 2000 engine would have had a v.low CR. so they put a dome on the piston. This makes almost no difference to the uncompressed volume, but brings the chamber volume down in line with the smaller stroke, to maintain the CR.Cunning, eh?BUT, put a small chamber head (Mk.1)on a block with domed pistons, and the CR goes up to about 14.5! FIne if you can run on pure ethanol.John Link to comment Share on other sites More sharing options...
Slimboyfat Posted May 8, 2008 Share Posted May 8, 2008 It's an urban myth that early 6 pot engine stuff is difficult to obtain, I have never had a problem. Even the 1600 piston problem isn't really a problem if you use standard 1200 pistons (1720cc), I have built several like that recently. Link to comment Share on other sites More sharing options...
Slimboyfat Posted May 8, 2008 Share Posted May 8, 2008 jcarruthers wrote:I'm after a good Mk1 head if anyone has one :)The clearances are going to zero after 500 miles the recession is so bad now...So if anyone has one with nice hardened seats etc :)James I can do you a deal. I have one here with fresh hardened seats, and drilled out for 7/16" head studs. Punter cancelled order, bloody punters!PM me. Link to comment Share on other sites More sharing options...
thescrapman Posted May 8, 2008 Share Posted May 8, 2008 I can lay my hands on a small journal Mk1 2 litre if anyone is interested. From a Vitesse.Also a seized 1600 for parts.Let me know.CheersColin Link to comment Share on other sites More sharing options...
heraldcoupe Posted May 8, 2008 Share Posted May 8, 2008 thescrapman wrote:Also a seized 1600 for parts.I've got one like that here if anyone closer to Wiltshire needs one.Cheers,Bill. Link to comment Share on other sites More sharing options...
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