6g72 block?

Silverstreak · Post by **Silverstreak** » Mon May 09, 2011 11:30 pm

wondering if my w58 billhousing will mate up to the 6g72 block?

I'm able to score a great deal on a long block tt's ecu, harness ect...

Thinking about going this route over the 6 bolt 4g63t if its not to much modification.

Bill Hincher · Post by **Bill Hincher** » Tue May 10, 2011 3:24 am

I have been working on them for another site.

I been a little streched for time but I have most of the parts I need now, the guys wanted me to build the GM auto trans set up, which is no big deal, but a lot of other guys wanted the C 4 Ford trans for smaller size and good price

I know this gets complicated, but I needed to finish the 2JZ GM auto trans set up, but you know? thats like forcing 5 lbs of shit into a 3 lbs can, Its a pain in the ass, expensive complicated piece of work because of the torque converter bolt patterns and depth of the engine block , the C 4 / 2JZ looks sooooooooooo much better

anyway, with those ingredients in mind, I bought a couple of 6G72 engines, cut one up and got all my numbers in line for the GM auto trans, I started working on my own flexplates in the 2JZ set up and came up with a ring gear/starter combination that also applied to the 6G72 set up

I got most of that sorted out, then I looked at the cooling and I found a remote water pump to feed the two front coolant inlets and return to the front of the cylinder heads, and that was real important, because I couldnt have a large flexplate with the rear coolant lines that came with the engine

soooooooooooo here is what is going on, I am finishing out the final pattern for the Subaru bellhousing to the W 55/59 and the R150&151 as we speak, I built the jigs for the front motor mount for the 4G63 / Conquest this week, I am adjusting out the 4G63 narrow block R 154 for a new skirtless style for Jeff Ball this month and building the C4/ 2JZ along with the 6G72 /C4 trans

after that is done the T 56 wide block and then the manual trans for the 6G72

Silverstreak · Post by **Silverstreak** » Tue May 10, 2011 10:35 pm

wow your quite the busy guy bill!

also would you happen to know if your w58 billhousing will bolt to the 4g93 or 4g94 series blocks?

Bill Hincher · Post by **Bill Hincher** » Wed May 11, 2011 6:27 am

this is where the office guy walks into the dyno room with a bunch of paper work and asked the rider on the motorcylce ' are you busy' ?

Bill Hincher · Post by **Bill Hincher** » Fri Jun 10, 2011 10:18 pm

I needed to build a flex plate so I got some HSLA commercial grade 1/8 in plate and marked the center with a small starter hole, you can see the original flex plate was built from 1/16th but its shape was fairly close

this machine is called a nibbler or pullmax style machine, it was built for making circles, but I also build my own dies for what ever purpose I want to use

a flex plate is just that, it flex's and its also like a spring, it gets pushed forward under load, the flex plate has to move about .060 so a bit of a bend not only keeps a little of pressure against the load but when you bend steel, you double its strength without adding weight

I opened the center hole so I could mount my adapter and then drilled it to accept the Ford C-4 torque converter and this was one of the reasons the C 4 was chosen, it has a 10.5 in bolt circle pattern, which was just small enough to fit inside the ring gear that was selected, the GM converter was 10.75 and would not fit

I mounted the flex plate to the coupler just for the center, then I trimmed the outer diameter to size for the ring gear

this is the finish look, I need to pay some attention to detail but I was pretty happy with it, with the smaller ( 10 in or smaller ) converter I will be mounting the starter as a reverse set up but I kept the ring gear on the flex plate so anyone could select and buy what ever stall speed converter they may want

fuel · Post by **fuel** » Sat Jun 11, 2011 6:38 pm

WOW that is great work there Bill - I gather you will still be a fair while away from doing a manual trans for a 6G72 yet? Unsure if you remember me, but I wanted to do the 6G72 swap into my Sapporo coupe, got as far as mounting the engine on Montero mounts and then promptly pushed it into the corner and forgot all about it

At this stage I think I'll be using an R154 Toyota gearbox (I am expecting around 300-350kW ATW from this engine) with a Montero auto bellhousing and 1UZ->R154 adapter plate and concentric throw-out bearing setup. However I still would be interested in one of your bellhousings to keep everything simple and tidy if you do go ahead with producing them Bill!

jeffball610 · Post by **jeffball610** » Sat Jun 11, 2011 8:21 pm

Bill is the F-ing Man. I hope this is a profitable experience for you, cause you really put in the work.

Bill Hincher · Post by **Bill Hincher** » Wed Aug 10, 2011 11:39 am

This was a huge advancement in this project,I am very happy that all the idea's have come together this well up to this point, the only real obsticale at this piont is the starter mount, but I am sure that will be overcome

anytime you build a ridge into the metal, you have to straighten out the material , this is a punch converted to a shrinker using merchant jaws

this is a pass through flywheel bolt araingement, I have found ARP fasteners for the flywheel

I built a small die to add another bend in the flex plates at the mounting bolt area, notice the fit of the converter nose in the crankshaft coupler

this was a tight fit, it was a series of selected over counter parts that once bolted together everything fell into place

an inch is as good as a mile when you are in charge

Bill Hincher · Post by **Bill Hincher** » Sat Aug 13, 2011 10:43 pm

I knew placing the starter would be the toughest part of the build, so I moved ot around many times before I decided on the placement, this is a neet little puzzle

knuckshaft · Post by **knuckshaft** » Sun Aug 14, 2011 10:52 pm

Thatis amazing!

Bill Hincher · Post by **Bill Hincher** » Wed Aug 31, 2011 4:33 am

I just keep cutting, fitting ,welding and shaping the housing