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Discussion Starter #1
Start of 64 Chevy build. Old truck sitting in back. Thought it would be cool to start another money pit, just didn’t want another LS motor build so thought a odd ball ISB 4 cylinder would be expensive. So opened the wallet and here we go.
 

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Discussion Starter #2
Tare down and start the fun. Always wanted a shortbed, so I’ll make one. C notch and gussets.
 

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Discussion Starter #3
Engine and Trans mounting. Engine mount from freight liner van. Cut it down and trimmed up to fit in the frame rails. Made 2 trans mounts, one mid mount and another tail mount. Keep it all in one place and lots of cross members to eliminate chassis flex 567D7D1B-CA5E-4326-98BF-6DB634C1A24B_1539633541492.jpg ED71FDB9-C8CC-4271-9FD6-58B0887AFA93_1539633489975.jpg 6E123C43-8273-4A54-90BF-4D2185AEE6E5_1539633444239.jpg 69B38B38-BBF6-4120-90B3-D48D796B63FA_1539633376288.jpg 22F2DA94-F25B-47BA-8B84-94413E6EECB8_1539633138104.jpg
 

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Discussion Starter #6
Circle track style rear axle Ford 9” build. Aluminum Strange center section from Mike at Quick Performance. 3.50 ratio. Speedway Grand National housing. Full float hubs. 31 spline axles. Grizzly locker 7156EFC0-C48A-42F2-89A8-7737EA2EF09B_1539634895245.jpg 54625CFC-39BD-4AD0-A7D9-43E932BEBFF3_1539634842852.jpg 58771D28-70F9-481E-84BB-A88F4FE8D065_1539634789988.jpeg
 

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Discussion Starter #10
Changing ECM parameters. Disabling safety junk and engine protection, eliminate torque derate, change top speed, axle ratio, etc. just fighting the rpm parameters. If anyone has any ideas let me know. Looking for 3400 rpm. Locked out at 3000. I don’t have enough experience with a CM850 ECM. Looking to an aftermarket ECM, aftermarket supplier has base tune built and a running model. Once mine is road worthy, ECM to be switched.
 

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Discussion Starter #11
Gauge cluster Fabrication. Autometer gauges. Boost gauge mounted in dash panel with a Ametek J1939 CAN gauge. Ametek gauge is awesome as it will tell you everything the engine ECM is seeing over the 1939 datalink. That one single gauge gives oil pressure, water temp, mph, rpm, trans temp, and more. Even acts as a warning light/dummy light indicator. Best eBay 20 bucks yet. 08C37B6E-5599-4182-B446-6864F8224E81_1539637038983.jpg D56213B0-707C-4D82-96ED-866BD2DF00FE_1539637723411.jpg B94AE0DF-BD55-44CD-8F92-48195C808DDC_1539636993744.jpg
 

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This is going to one nice ride. Any particular reason for wanting the high RPM. Peak torque of that engine will be around 1800 RPM. Check with member Steed. He's working on an ISB with plans to get into the 300+HP range. He's a computer expert with the US Army.
 

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Discussion Starter #13
Took 8” off the rear of bed today. Also the toy man from OnTrac showed today with a front disc conversion drop spindle kit and some 15 x7 torq thrusts for the front end. Front drop will be 5.5” and rear is 7”. Front is 3” drop springs with 2.5 inch spindle. Rear is 5” springs and 2” blocks. 4BBF8A0D-84E9-432C-84C5-4B0AEA7A0129.jpg 1DFE4C4D-263B-40B9-9287-60892E71914A.jpg 4C14D036-1780-47F4-A8FE-44479D191A0F.jpg
 

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I do like the way you are going about on this build and definitely subscribing to this one ! It looks like a fun ride when you get it done ! bouncebounce
 

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Discussion Starter #18 (Edited)
Well been working in them hills lately. should get back to truck in two weeks, being sent to Yosemite area for awhile. But here’s some of Gods country
 

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Discussion Starter #19
Getting the roller back together. Installed quick ratio steering box, cpp sway bar, and some other stuff. The Cummins pretty much maxed out the lowering springs, so need to find some big block springs. I’ll start trans tunnel next then brake system and power steering.
 

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Very very clean work!
I'm not sure your end performance goal, but with my rear end gears, tire size and the Allison I've found that the TCM parameters work well with the 3000 rpm gov limit that I too bumped mine up to. I have my application in a 6200 lb truck with 38.5" tires and 4.57 gears and its snappy quick once the ECM maps let the fuel in. Its a touch laggy at the first go but I've not found a situation where I've needed more RPM before the Allison grabbed the next gear and the engine had plenty of torque to make it go. Since you have access to Insite it seems, do you have access to Allison DOC? You can use the secondary shift schedule lead to load a "performance" shift schedule that you can tweak with some to get a better grab and go acceleration and keep it under the 3k gov.

One of these days, someone is going to be able to crack the Chrysler ECMs and apply them to these engines... And then it'll be a whole new world.

I do like the build a lot man. Very clean work and good attention to detail, which is something you are seeing less and less on these DIY boards.

Also, what were you doing out on Yosemite? I am a bridge inspector / engineer myself and have worked in a lot of the major parks over the past 10 years.
 
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