Bill Hincher Posted October 2, 2010 Report Share Posted October 2, 2010 (edited) Mingo was the first to ask, sooooooooooooooooo I went out and got a 6G72 engine and cut it up to see what it looked like inside and outhttp://www.billsautofab.com/images/6G72GMadapter1.jpg funny? when I was starting out working on cars I always thougt the engine block was a 'dumb' peice of iron, but there is a great deal to learn from cutting away the core and finding out its secrets before a buildhttp://www.billsautofab.com/images/6G72GMadapter2.jpg The GM auto trans plate overlaps the 6G72 v-6 bolt pattern very nicely. because I can cast my adapters, I am not dictated to by a standard adapter plate thickness size, I can adjust to any thickness I need http://www.billsautofab.com/images/6G72GMadapter3.jpg I started to think about starter spacing and this will lend itself to the selection of flywheel size http://www.billsautofab.com/images/6G72GMadapter9.jpghttp://www.billsautofab.com/images/6G72GMadapter11.jpg then I turned my attention to the coupler design, the first thing to do was to find all the critical demensions of the exiting crankshafthttp://www.billsautofab.com/images/6G72GMadapter12.jpg I cut up the crankshaft too >;o)http://www.billsautofab.com/images/6G72GMadapter13.jpgI laid out a couple differnt size flywheels just to see what would interfer or what had a better fitmant so I could make the best choices during the designhttp://www.billsautofab.com/images/6G72GMadapter15.jpg http://www.billsautofab.com/images/6G72GMadapter16.jpgIn the rough draft, the coupler is a no comprimise peice of hardware, there can be no failure at this piont, any comprimise in this unit will be made elsewhere in the design, the thickness of this unit will dicate the thickness of the adapter platehttp://www.billsautofab.com/images/6G72GMadapter18.jpg I know, it aint a computer drawing, but I spend hours just drawing and erasing and drawing thicknesses, shaving 1mm here and adding an angle there and keeping it strong and keeping it light and trying this and that , just hours of thought and frustration >;o) making a complex peice simple is what I enjoy doing Edited May 20, 2011 by Bill Hincher Link to comment Share on other sites More sharing options...
SuperSteve57 Posted October 2, 2010 Report Share Posted October 2, 2010 this is awesome lol! i have always wanted to do this. Link to comment Share on other sites More sharing options...
Bag-O-Chips Posted October 2, 2010 Report Share Posted October 2, 2010 Bill, you're the missing link when it comes to franken-builds lol GREAT JOB man!!! Link to comment Share on other sites More sharing options...
shorequest Posted October 2, 2010 Report Share Posted October 2, 2010 Any plans for a adapter for a manual trans in the future? Just wondering since ill hopefully be starting a 6g72 swap in a few months. Link to comment Share on other sites More sharing options...
Bill Hincher Posted October 2, 2010 Author Report Share Posted October 2, 2010 Any plans for a adapter for a manual trans in the future? Just wondering since ill hopefully be starting a 6g72 swap in a few months. yeah, I will be building the manual set up, I just gotta find out what trans guys want I can do the t 5 ford or the T 56 6 speed or even the R 154, but the R 154 is getting hard to find and the T 56 is expensive, the W 55 wouldnt hold the power, so i gotta look over the options and find the right gear ratio set up Link to comment Share on other sites More sharing options...
Metric-man Posted October 2, 2010 Report Share Posted October 2, 2010 Can you cut up a DOHC head from the 6g72 and cast in another cylinder ??? Link to comment Share on other sites More sharing options...
Mingo1 Posted October 2, 2010 Report Share Posted October 2, 2010 Wow this is great job Bill this is why I opted for you to do this. Link to comment Share on other sites More sharing options...
Bill Hincher Posted October 2, 2010 Author Report Share Posted October 2, 2010 Can you cut up a DOHC head from the 6g72 and cast in another cylinder ??? I can do anything, but it aint cost effective, I will probably cut a couple heads up just to explain the cooling system and change the outlet to the front of the engine but you know? even after I explain and work out the cooling systems, no body uses it Link to comment Share on other sites More sharing options...
Metric-man Posted October 3, 2010 Report Share Posted October 3, 2010 I can do anything, but it aint cost effective, I will probably cut a couple heads up just to explain the cooling system and change the outlet to the front of the engine but you know? even after I explain and work out the cooling systems, no body uses it I've got a 91 I've rebuilt the bottom end they don't use a trans computer for that year but, the successive years they did ? am I correct? it been awhile and I have to go back to my notesI've collected everything for a swap the ECU and the harness, and I've had it for a while because other business took precedence.it only had 34,000 miles on it it was a warranty replacement because of the rod bearings or and or the crank bearings,The 91's also only used a cast crank and did not use double bolt mains but it used the girdle to re-enforce the crank mains.I can swap in a forged crank and I hear I can get the mains drilled for double bolts but I don't think it is ultimately necessary. The heads were and still are allot of work I haven't finished them I don't know if it was that year in-particular but there was a significant amount of casting flash that I removed .I ported and blended them nicely but, I want to build them up and replace the lifters maybe even use adjustables but they're mega $$$for my budget so new stock (not crappy ITM's) are expensive enough all 24 of them. I'd use your info Bill, I haven't completely finished the heads and I still want to see if I can get them all flowing the same CFM'snot that I would go out to the shop and start working tomorrow but eventually I will finish them, couldn't beat it for 300.00the valve spring compressor extension I'm using is originally for a vett engine, but I don't remember which one (or are they all the same ?) And don't forget they still get some cross traffic from the 3Si/stealth site here, those guys would appreciate it I would think. Link to comment Share on other sites More sharing options...
Bill Hincher Posted October 3, 2010 Author Report Share Posted October 3, 2010 I've got a 91 I've rebuilt the bottom end they don't use a trans computer for that year but, the successive years they did ? am I correct? it been awhile and I have to go back to my notesI've collected everything for a swap the ECU and the harness, and I've had it for a while because other business took precedence.it only had 34,000 miles on it it was a warranty replacement because of the rod bearings or and or the crank bearings,The 91's also only used a cast crank and did not use double bolt mains but it used the girdle to re-enforce the crank mains.I can swap in a forged crank and I hear I can get the mains drilled for double bolts but I don't think it is ultimately necessary. The heads were and still are allot of work I haven't finished them I don't know if it was that year in-particular but there was a significant amount of casting flash that I removed .I ported and blended them nicely but, I want to build them up and replace the lifters maybe even use adjustables but they're mega $$$for my budget so new stock (not crappy ITM's) are expensive enough all 24 of them. I'd use your info Bill, I haven't completely finished the heads and I still want to see if I can get them all flowing the same CFM'snot that I would go out to the shop and start working tomorrow but eventually I will finish them, couldn't beat it for 300.00the valve spring compressor extension I'm using is originally for a vett engine, but I don't remember which one (or are they all the same ?) And don't forget they still get some cross traffic from the 3Si/stealth site here, those guys would appreciate it I would think. How about I finish the adapter first? >;o) Link to comment Share on other sites More sharing options...
Metric-man Posted October 3, 2010 Report Share Posted October 3, 2010 How about I finish the adapter first? >;o) OK, sorry I'll gather my info so, as not to babel. Link to comment Share on other sites More sharing options...
Bill Hincher Posted November 21, 2010 Author Report Share Posted November 21, 2010 there was a tredmendous amount of time and attention to detail in the 6G72 V-6 coupler, the bolt pattern is completely staggered individual locations, I will be doing more as I develop the idea, the flywheel will need to be built for the couplerhttp://www.billsautofab.com/images/6G72GMadapter19.jpg http://www.billsautofab.com/images/6G72GMadapter20.jpghttp://www.billsautofab.com/images/6G72GMadapter21.jpg http://www.billsautofab.com/images/6G72GMadapter22.jpghttp://www.billsautofab.com/images/6G72GMadapter23.jpg http://www.billsautofab.com/images/6G72GMadapter24.jpg Link to comment Share on other sites More sharing options...
Mingo1 Posted December 3, 2010 Report Share Posted December 3, 2010 Great work just here waiting patiently. But very excited Link to comment Share on other sites More sharing options...
Mingo1 Posted December 3, 2010 Report Share Posted December 3, 2010 Great work just here waiting patiently. But very excited Link to comment Share on other sites More sharing options...
Starquest_Shopper Posted August 17, 2013 Report Share Posted August 17, 2013 yeah, I will be building the manual set up, I just gotta find out what trans guys wantI can do the t 5 ford or the T 56 6 speed or even the R 154, but the R 154 is getting hard to find and the T 56 is expensive, the W 55 wouldnt hold the power, so i gotta look over the options and find the right gear ratio set up I was researching putting a Chrysler 2.7L V6 into a SQ and found this thread. Any other info on adapting a manual to the 6G72? The only ones I could find that *might* work were some manuals from the D-50/Montero. Link to comment Share on other sites More sharing options...
Bill Hincher Posted August 19, 2013 Author Report Share Posted August 19, 2013 everything from here got moved over to here http://www.starquestclub.com/forum/index.php?showtopic=119556 so you can see the complete housing build . the manual set up is on my list but the starter location remains the question mark, I have been building the K20a Honda GM auto set up and from what I have learned on that build will carry over to the future 6G72 series bellhousings Link to comment Share on other sites More sharing options...
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