RalliArt 0 Posted June 25, 2008 I have been thinking, what would happen if i put head from Mi16 on a GTI motor, with pistons, actually the whole mi16 engine, but keeping the crankshaft and the connecting rods from the 1.6 GTI engine.Tell me guys what do you think...... and if some one have done a project like this let me know.... Share this post Link to post Share on other sites
Baz 421 Posted June 25, 2008 Do search, been covered a few times before. Share this post Link to post Share on other sites
Hilgie 16 2 Cars Posted June 25, 2008 http://forum.205gtidrivers.com/index.php?showtopic=81054 Share this post Link to post Share on other sites
RalliArt 0 Posted June 25, 2008 Hilgie Thank you very much, very helpful..... Share this post Link to post Share on other sites
B1ack_Mi16 67 Posted June 25, 2008 Hilgie Thank you very much, very helpful..... Although you might concider to use the XU10J4R or XU10J4RS heads as they have about 2cc less chamber volume. Problem with XU 1.6 16v is that it might be hard to get enough cr. Share this post Link to post Share on other sites
Batfink 201 Posted June 26, 2008 i dont think you can get enough compression without getting custom pistons. Share this post Link to post Share on other sites
welshpug 1,661 Posted June 26, 2008 depends what you deem enough, but for competition I would agree that with the combination of standard parts it would be fairly low but still higher than the standard 1.6 8valve. Share this post Link to post Share on other sites
RalliArt 0 Posted June 27, 2008 So, i have been reading a lot, since I'm thinking of this project, let me get it strait, i need some custom pistons, custom rods..... what happens if i use std mi pistons with std 1.6 rods, and std crank..... There is a question I'm interested in, why is necessary to deck the block..... Share this post Link to post Share on other sites
welshpug 1,661 Posted June 27, 2008 Mi pistons don't fit the 1.6 rods, the gudgeon pin is a different size. (20mm as opposed to 22mm) people deck the block to raise the compression ratio rather than buy a set of custom high compression pistons. Share this post Link to post Share on other sites
James_R 3 Posted June 27, 2008 You can put 405 SRi pistons on to 1.6 rods, but you'd need to add valve cut outs alternatively Xu7 engine's have a 22mm press fit pin which apparenlty Mi pistons can be fitted on to. Sandy knows about the ins and out of this, worth contact him about it. obviously reasonable compression is achievable there's a few out there, just why unless its for competition, when it may be simpler to use a TU based 1600 16v engine? Share this post Link to post Share on other sites
welshpug 1,661 Posted June 27, 2008 1600 TU's are heavier Share this post Link to post Share on other sites
Batfink 201 Posted June 27, 2008 probably not by much when you add gearbox weight Share this post Link to post Share on other sites
welshpug 1,661 Posted June 27, 2008 good point, but then if you want a gearbox capable of taking the power you'd be running BE4 anyway... Share this post Link to post Share on other sites
Batfink 201 Posted June 27, 2008 touche! I thnk for a road car the tu route is the best, there are possibly some advantages to running an xu 1.6 16v in competition but thats a completely separate arguement Share this post Link to post Share on other sites
RalliArt 0 Posted June 28, 2008 @welshpug- ok i understand this, what if i drill the rod in bigger size and put a 22mm. bush, will this be good, and if i make it that way, will the Compression ratio be enough, so if it's enough it won't be necessary to deck the block.... so any other obstacles.... ? and do you think it's good competition engine the xu16's.... Share this post Link to post Share on other sites
James_R 3 Posted June 28, 2008 1600 TU's are heavier Correct, but the money saved could be put else where to make it quicker TU'd 1600 faster Not to mention the port sizing would be miles better on a TU than the XU Mi heads. Share this post Link to post Share on other sites
Sandy 191 Posted June 29, 2008 There isn't enough material in the 1.6 rod to oversize and bush it. Share this post Link to post Share on other sites
