1972 Cutlass, 362cid Olds V8

General talk about successes. See older information on MSRUNS forum.

1972 Cutlass, 362cid Olds V8

Postby Rick Finsta » Mon Feb 14, 2011 8:56 am

Gentlemen - I'm not sure if this qualifies as a success story so far, as it's still a work in progress, but I thought I'd share anyways. I'll continue to update as I need to. I originally started this build because my 362cid Olds likes to eat racing fuel, and I wanted to switch to E85 (I pay for it in my taxes, might as well reap the benefits). The car runs 11.80s at 112-115mph in the 1/4 mile, so it was a good solid combination with the carburetor, and had great street manners, but since I was going to have to update fuel system and carb anyways, I thought I'd try out the MS (this is to learn more about it so when I build my turbo'd small block Olds with a MS3+3X I'm already on the learning curve).

Unit is a MS1 running MSnS code (will be fuel only at first, though), with a 36-1 trigger wheel, and direct coil control of my HEI coil (EDIS 8 later). Engine is a 500hp 11.5:1 4.125x3.385 BxS Olds 350 with ported factory iron heads and no frills. Cam is a Lunati 418A1LUN solid flat tappet, and carburetor has been a ProSystems custom 820CFM Holley 4150. I'm using a dual plane manifold on this, as this engine did NOT like a single plane on the dyno. I'm doing most of the modifications myself. As this is 40 year old wiring, I decided to rewire the whole car; in the past I've upgraded component sections, but never pulled it all out and started over. What a mess. I'm about 90% done with the main system (still have to finish the engine harness and some gauges and such), and I'll test it before wrapping everything up and calling it done. Then on to the EFI, which you can see is already tested and ready to rock on the firewall.
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Here's some pictures of the intake progress. First pic is the jig I built to grind step drills. It's really simple with the x-y table and depth stop. I have to manually make the back cuts, but I've had great success both with the 14mm stepped bit I made for the rails, as well as the 3/8" non-cutting pilot to 3/4" bit I used for the bung holes (lulz). Second picture is the intake on my bench with the injector hole locating jig in place after cutting the larger holes and test fitting the bungs for binding. I simply used angle iron and 3/8" ID tubing (using the rails as templates) and then positioned everything and drilled the 3/8" pilot holes. So far so good.
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Here's the highly technical high-dollar setup I had fabricated to hold the bungs in place while I epoxied them. I had to start over on one side when I accidentally got some epoxy on an injector body (uuugh, I need junk units for this stuff!) but everything turned out great. I had to use the kitchen counter because it's the only perfectly level surface I could find in the house or garage, and I used a level to make sure the bungs were even front-to-back and bank-to-bank. The high-speed-low-drag tactical adhesive strip is holding the injectors vertical. ;)
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Lastly, here's the product so far. I still need to make hold-down brackets (I'm playing with some design ideas, but I'm thinking I'll hold it down with straps coming up from the manifold-to-head bolts), but I've got the harnesses done. I wired it up so with a simple 4 to 1 weatherpack adapter I can switch from bank-to-bank at first to sequential later on. I'm going to use a dedicated weatherpack bulkhead for the EFI side of things, so I will literally be able to pull some connectors apart and throw a carb on it later on if I so desire.
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To be continued...
Rick Finsta
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Re: 1972 Cutlass, 362cid Olds V8

Postby GregG » Tue Feb 15, 2011 4:52 am

It's looking great!

What epoxy did you use to attach the bungs to the manifold?
GregG
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Re: 1972 Cutlass, 362cid Olds V8

Postby Rick Finsta » Tue Feb 15, 2011 7:23 pm

I just used JB Weld (not JB Quik, but I'm not sure what the difference is, really). There are other products out there that are used often in heads and intakes for porting and modifications, but I've not heard of people having many problems with JB Weld, and it's readily available, so...

I was originally going to use a specialized aluminium brazing rod (Durafix) with which I've had great luck, but I had no way of holding the bungs in place and even without either the injectors in place or a fancy jig. Honestly, I got a little anxious and decided to go the quicker route.
Rick Finsta
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Posts: 184
Joined: Fri Dec 10, 2010 4:41 pm

Re: 1972 Cutlass, 362cid Olds V8

Postby Rick Finsta » Mon Mar 28, 2011 10:04 am

More pics soon; I got the MS ECU fired up on battery power yesterday with everything attached and she's communicating with my laptop and all the sensors seem to be reading right so far (need to get EasyTherm to calibrate the CLT, IAT is dead on). Still a few odds and ends for the wiring, and then the fuel line and a few hose ands and fitting are all that's left before attempting to fire her up! :yeah!:

Pictures...

Motor Plate and sensor mounting:
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IAT mounted in the cowl. I took an old aluminum fitting (Earl's or something) and cut it so that I could sandwich the inner cowl panel between the sensor and a rubber spacer. Since the air will be coming from this area, I figured it was a better choice than under the bumper.
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And the "big picture" of the front end with the wiring harness installed, sans injectors, rails, and injector harnesses). I'm going to be bundling and covering it all over the next few days.
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Rick Finsta
Experienced MS/Extra'er
 
Posts: 184
Joined: Fri Dec 10, 2010 4:41 pm

Re: 1972 Cutlass, 362cid Olds V8

Postby Rick Finsta » Thu Sep 22, 2011 5:16 pm

Got her running today; I've had issues with my spark trigger, so I'm running fuel only until I get the idle tuned and such. :yeah!:

I am going to drop the idle valve, too, because even with the throttle all the way closed, it is idling at about 1100rpm. Idles at 60kPa, too, so the Ford valve is right out. She was pig rich and stumbling, so I dropped the req_fuel down a bunch and she smoothed right out.

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Rick Finsta
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Posts: 184
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