Nick Jones Posted May 11, 2012 Share Posted May 11, 2012 Type 9 gearbox......... shifter is further back even if it's been moved as far forward as practical on the gearbox. If you are lucky moving the hole back all the way on the cover might win you enough...... IIRC the 6 cyl covers should have the hole right at the back anyway - that looks like a Spitfire one? Nick Link to comment Share on other sites More sharing options...
Martin Posted May 12, 2012 Author Share Posted May 12, 2012 It is a GT6 gearbox cover, but it had to be "lengthened" Link to comment Share on other sites More sharing options...
Martin Posted June 25, 2012 Author Share Posted June 25, 2012 Isn´t that a nice view? However nobody said its easy, especially the front lower bolt / nut Link to comment Share on other sites More sharing options...
Nick Jones Posted June 25, 2012 Share Posted June 25, 2012 Nice looking manifold. Some use cap-head (internal hex for allen key) bolts instead of the studs to make fitting easier. Cheers Nick Link to comment Share on other sites More sharing options...
motov8id Posted June 25, 2012 Share Posted June 25, 2012 these may helphttp://buy1.snapon.com/catalog/item.asp?P65=&tool=hand&item_ID=642251&group_ID=674781&store=&dir=catalog the exhaust manifold is nicely made. Link to comment Share on other sites More sharing options...
Martin Posted June 26, 2012 Author Share Posted June 26, 2012 Hi, the manifold is quite similar to the "Mike the Pipe" one and it is sold by Moss. They still have some nice parts in stock for GT6 but I think they are not actively marketing them. Martin Link to comment Share on other sites More sharing options...
Martin Posted July 28, 2012 Author Share Posted July 28, 2012 next step ahead Link to comment Share on other sites More sharing options...
Martin Posted August 2, 2012 Author Share Posted August 2, 2012 after 21 month on his own feet again wish me luck for starting it on Saturday hopefully with a healthy oil pressure Link to comment Share on other sites More sharing options...
triumphlux Posted August 2, 2012 Share Posted August 2, 2012 Looking good your GT back on the ground. Reminds me of my old one in the same color. I bed you're nervous for Saturday Link to comment Share on other sites More sharing options...
Nick B. Posted August 2, 2012 Share Posted August 2, 2012 Which color is this? Jasmine ? Cheers Nick Link to comment Share on other sites More sharing options...
Martin Posted August 3, 2012 Author Share Posted August 3, 2012 Yes, I´m quite nervous for Saturday. Lets see. Yes the colour is Jasmine. It sometimes looks strange on Digital pics depending on the light (daylight, using flash on the Digicam..) Martin Link to comment Share on other sites More sharing options...
Martin Posted August 4, 2012 Author Share Posted August 4, 2012 I´m happy, the GT6 runs . I first primed the cam a bit with a grease gun filled with motor oil. With an adaptor I pressed it into the hole for the oil pressure switch. Then it started very nicely on the triple Webers. I immediately got the RPM to 2000 and it ran for some 5 minutes that way in our driveway. A lot of smoke from the manifold wrapping . Then I got into the car (reverse not easy to get into without a noise) and drove some 300 meters around the corner where there is a school and a gravel parking area with a field of bushes and trees between the parking area and the next houses. Took with me all the tools. There I then let the car doing the 20 minutes run in for cam and tappets. I then got the idle down to 1000 with appr 8 Deg advance and 3,5% CO. Oil pressure at 3000 RPM with hot engine 55psi. At idle it is appr 25PSI. So not on the very high side. At present I run Morris 15W50. That should do. A short "blast" showed that the T9 is working very nicely and shifts easy without any noise so far (it was used and I did not rebuild it). Response to throttle is very good. Colour of the spark plugs is good (brown / grey). Unfortunately oil drops from the front end of the engine. First I thought the oil seal, however after closer inspection I think it drips out of the lowest screw of the timing chain cover Further investigation needed. MOT ran out some 5 month ago. Before more driving around I have to sort that out. Cheers :) Martin Link to comment Share on other sites More sharing options...
Martin Posted August 8, 2012 Author Share Posted August 8, 2012 Got new MOT today DCOE´s are flodding a bit. I use the Mitsuba fuel pump, and I think I need a pressure regulator. Mitsuba makes app 0,38 bar. Martin Link to comment Share on other sites More sharing options...
GHR630 Posted August 8, 2012 Share Posted August 8, 2012 That's about 6psi or in other words, about twice what the Webers need, ergo - no surprise that they flood. IMHO impossible to set up side draughts without pressure regulator. Malpassi rules..... Link to comment Share on other sites More sharing options...
Martin Posted August 11, 2012 Author Share Posted August 11, 2012 Malpassi (Filter King) is in the car. Seems to work. However, hmmmmm......geometry???? Issue with the rockers ... Link to comment Share on other sites More sharing options...
motov8id Posted August 12, 2012 Share Posted August 12, 2012 I don't know if that is a picture of a problem. maybe the installed height of the valves is low relative to the center line of the rocker shaft. Did you have valve seat inserts installed? maybe lowering the top of the valve Link to comment Share on other sites More sharing options...
toofast2race Posted August 12, 2012 Share Posted August 12, 2012 New rockers? Made of cheese? Maybe fit oil-lite bushes and reface some old ones made of sterner stuff. Link to comment Share on other sites More sharing options...
motov8id Posted August 12, 2012 Share Posted August 12, 2012 (edited) that would be normal wear after a number of miles. the rocker is hitting on the far side of the valve stem. So the rocker is too high or the valve is too low. Lowering the rocker pedestal would put the valve stem and rocker at 90 degrees with no lift. Check the relationship with valve lash maybe all is normal. Edited August 12, 2012 by motov8id Link to comment Share on other sites More sharing options...
Martin Posted August 12, 2012 Author Share Posted August 12, 2012 Hi, I measured a bit (what I never did before, shame on me ) Normal GT6 head ( a spare original one from the dungeons): Valve hight 42mm my head (from Burgess) : Valve hight 44 mm That means (as block was milled to establish top deck clearance and the head was slightly shimmed) that my rockers are appr 3 mm too low can roller rockers help???????? Martin Link to comment Share on other sites More sharing options...
Nick B. Posted August 13, 2012 Share Posted August 13, 2012 Hi, I measured a bit (what I never did before, shame on me ) Normal GT6 head ( a spare original one from the dungeons): Valve hight 42mm my head (from Burgess) : Valve hight 44 mm That means (as block was milled to establish top deck clearance and the head was slightly shimmed) that my rockers are appr 3 mm too low can roller rockers help???????? Martin I added a shim under the rocker pedestals to solve the problem after decking. Cheers Nick Link to comment Share on other sites More sharing options...
motov8id Posted August 14, 2012 Share Posted August 14, 2012 If the rocker/valve geometry was ideal before the machine work, removing metal from the block deck and head would make the push rod long by that amount. If you took .015" off the block and.015" off the head that would be less than a mm. to compensate for at the rocker screw. you might not have a problem that needs solving. Check rocker to shaft clearance . The wear pattern may indicate the rocker is twisting on the shaft. Link to comment Share on other sites More sharing options...
Martin Posted August 26, 2012 Author Share Posted August 26, 2012 (edited) some pics on the wear pattern; used 2 mm shims Edited August 26, 2012 by Martin Link to comment Share on other sites More sharing options...
Martin Posted August 31, 2012 Author Share Posted August 31, 2012 (edited) Last evening I mounted the rocker shaft with three different sets of spacers for the pedestrals. To be honest, none of the results was really good. Then I took a used rocker shaft assembley (well used but not worn) and everything seems to be fine. Despite the nearly 2 mm higher valve position , I used no shims with the used shaft assembly. Do these engines only work when equipped with well used parts? Our Spitfire only got new pistons and bearings / gaskets. All the rest was re - used. Car works absolutely fine and reliable since years. Edited August 31, 2012 by Martin Link to comment Share on other sites More sharing options...
toofast2race Posted August 31, 2012 Share Posted August 31, 2012 Do these engines only work when equipped with well used parts? It certainly seems that way doesn't it - those rockers obviously weren't profiled correctly Link to comment Share on other sites More sharing options...
Martin Posted September 16, 2012 Author Share Posted September 16, 2012 Hi , I installed some minutes ago Harland Sharp roller rockers. They arrived Friday from the US. With 1mm spacers they touch exacly in the middle of the valve top. Some machining was required at the rockers for Valve 1 and 12. A short drive was o.k. Reset the valves clearance after the engine was hot. Hope everythig is good now. Now I have to run in the engine . Lets see. Cheers Martin Link to comment Share on other sites More sharing options...
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