What is the difference between my two 727ís - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 17 (permalink) Old 10-17-2011, 12:02 AM Thread Starter
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What is the difference between my two 727ís

I have a 727 in my 72 D200 with a 318. I also have one in my 90ish Dodge with a 5.9 12V Cummins. One thing I noticed is my 72 gasser does not have an external cooler other than the one in the radiator. The one behind the Cummins has huge lines that runs to an external cooler. I get the one behind the Cummins gets hotter but I thought big lines like that hurts the fluid pressure. So, what other differences are there and how can the one behind the Cummins push that much fluid?
By the way, I know one will not bolt in where the other is. I am asking these questions because the 727 in my 72 gasser failed. Before I start buying parts to repair it I want to know what the one behind the Cummins has to enable it to handle that 5.9.
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post #2 of 17 (permalink) Old 10-22-2011, 03:56 PM
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The diesels trans has more clutchs, larger pump assy, larger input shaft, larger output shaft. With the added heat made by the converter behind the diesel. Dodge had to step up the cooling of the trans. As far as pressures. The cooling circuit only has about 15 PSI going threw it. The bigger lines allows more volume of fluid flow.

If you tow a lot. The gasser needs more cooling added.

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post #3 of 17 (permalink) Old 10-22-2011, 09:52 PM Thread Starter
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Will the internals of the from the one behind the Cummins fit inside my gasser version?
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post #4 of 17 (permalink) Old 10-22-2011, 10:28 PM
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I don't know of anyone that has tried to take a diesel trans and install the parts in a gasser. I am not sure what you could use.

Going behind a stock 318 isn't going to take much to hold it.

Unless you work over 318's like I used to.

93 W350 w/duals, fuel pin turned, 6X.018" injectors, 4" exhaust, 3" air intake horn, HX40/16, G56 /SBC Con-OFE, 307's axles' 2" skyjacker lift, B&W flatbed
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post #5 of 17 (permalink) Old 10-22-2011, 10:30 PM Thread Starter
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I doubt this 318 will ever see 300 ponies. I do plan a few upgrades but nothing over the top.
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post #6 of 17 (permalink) Old 10-22-2011, 10:42 PM
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Here is the last 318 I played with. I didn't get into the engine. I gave the carb to this guy after I went threw it. I went down and set it up on the engine and handled the linkage hook up and so on.

http://www.youtube.com/watch?v=kPGHCobt3cM

We never figured out where the smoke came from. the truck hasn't done it sence eather.

93 W350 w/duals, fuel pin turned, 6X.018" injectors, 4" exhaust, 3" air intake horn, HX40/16, G56 /SBC Con-OFE, 307's axles' 2" skyjacker lift, B&W flatbed
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post #7 of 17 (permalink) Old 10-23-2011, 12:10 AM Thread Starter
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damn I want a W300 so feeaking bad. I have a 5.9 that would be perfect for one. That is very impressive for a 318. I know they are fine engines, but I never thought of one as a power house. I may have to tap into your knowledge when I am ready to adress the engine in my D200.
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post #8 of 17 (permalink) Old 10-23-2011, 01:47 AM
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Let me check with that guy. The last time I asked him he had two more W300 gassers. They are running also. Both with flatbeds.

I know he also has a 93 W350 diesel. A 86 crew cab diesel conversion 2wd. A 89 W250 diesel pushing 525 HP.

Yea he is a big 1st gen guy also.

Playing with a 318 is easy. Take the stock induction system off and throw it way. Then start with something better. For small blocks I prefer a torker intake. That is what was on the truck for that pull. It had a 650 vac secondary Hollery on it. I did some jetting from experiences with 318's I had run before and it worked good for that rig.

He has pulled off the torker and installed a LD340 mainfold. So far he seems to be thinking about going back to the torker. Both had the same carb on them with no changes. For that LD he needed to drop the main jets a couple of sizes.

93 W350 w/duals, fuel pin turned, 6X.018" injectors, 4" exhaust, 3" air intake horn, HX40/16, G56 /SBC Con-OFE, 307's axles' 2" skyjacker lift, B&W flatbed

Last edited by Philip; 10-23-2011 at 02:03 AM.
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post #9 of 17 (permalink) Old 10-23-2011, 01:50 AM Thread Starter
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Man, I really want one, but the money is just not there for me. If he has a complete W300 with little to no rust I will cry like a baby because I doubt I can get it. I found a couple in a Tennessee salvage yard with wrecker bodies on them. They were beat to hell, but ran. I tried ot get them both but they planned to use them in the yard. I doubt there is anything left now though.
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post #10 of 17 (permalink) Old 10-23-2011, 02:05 AM
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I'll see what he still has. The funny part is I just got off the phone with him about 30 mintues ago.

93 W350 w/duals, fuel pin turned, 6X.018" injectors, 4" exhaust, 3" air intake horn, HX40/16, G56 /SBC Con-OFE, 307's axles' 2" skyjacker lift, B&W flatbed
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