SD 7.3 into OBS
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lost
Joined: Apr 2003
Posts: 290
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From: Worland, WY
SD 7.3 into OBS
I picked up a 2000 SD 7.3l, 6spd with 127k. Runs great and I am thinking of swapping the motor into my 97. I read a few threads on the swap but didn't get enough details.
If I did the swap I would put in new single shot stage 2s, t500, and 38r. Whats the easiest way to go about this or is it worth the hassle?
My biggest dilemma is I could sell the SD and use the money to put all the parts on the 97, but I would still have a 216k motor......
If I did the swap I would put in new single shot stage 2s, t500, and 38r. Whats the easiest way to go about this or is it worth the hassle?
My biggest dilemma is I could sell the SD and use the money to put all the parts on the 97, but I would still have a 216k motor......
Hotshot
Joined: Feb 2009
Posts: 10,408
Likes: 75
From: Plankinton, SD
Morning Chris! If yours runs good, 216k isn't that many miles. You could do a compression check to make sure your motor is in good shape. If that checks out ok, which it should, I'd sell the SD and build what you have.
I can't remember if they switched to pmr connecting rods in 2000, or 01 sometime. You don't want a pmr motor if you are looking at stage 2's.
I can't remember if they switched to pmr connecting rods in 2000, or 01 sometime. You don't want a pmr motor if you are looking at stage 2's.
Hotshot
Joined: Oct 2003
Posts: 17,791
Likes: 98
From: Ashland City, TN
Be a badass with that setup.
Thread Starter
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lost
Joined: Apr 2003
Posts: 290
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From: Worland, WY
Morning Chris! If yours runs good, 216k isn't that many miles. You could do a compression check to make sure your motor is in good shape. If that checks out ok, which it should, I'd sell the SD and build what you have.
I can't remember if they switched to pmr connecting rods in 2000, or 01 sometime. You don't want a pmr motor if you are looking at stage 2's.
I can't remember if they switched to pmr connecting rods in 2000, or 01 sometime. You don't want a pmr motor if you are looking at stage 2's.
PM returned Chris.
Post Fiend
Joined: Dec 2009
Posts: 15,505
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From: Livoina,La
No you won't touch the front cover.
Just take your brakets off the old engine and put em on the new one and put all the OBS accessories on
Just take your brakets off the old engine and put em on the new one and put all the OBS accessories on
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Hotshot
Joined: Feb 2009
Posts: 10,408
Likes: 75
From: Plankinton, SD
I'm doing good Chris. Thanks for the reminder on the rods Mike, it was too early for me to remember right off hand.
If your compression checked out ok, you could just swap parts onto your motor. Saying that though, it may be easier to pull them and just swap them.
One more thing, can you make enough on selling the SD to upgrade yours? If you don't sell the SD and use its motor, efuel, other parts, are you going to be sitting on the rest of the truck? Financially it seems to me if your compression check is ok, you'd be money ahead to sell it and just upgrade yours. Just some thoughts.
If your compression checked out ok, you could just swap parts onto your motor. Saying that though, it may be easier to pull them and just swap them.
One more thing, can you make enough on selling the SD to upgrade yours? If you don't sell the SD and use its motor, efuel, other parts, are you going to be sitting on the rest of the truck? Financially it seems to me if your compression check is ok, you'd be money ahead to sell it and just upgrade yours. Just some thoughts.
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Thread Starter
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lost
Joined: Apr 2003
Posts: 290
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From: Worland, WY
I'm doing good Chris. Thanks for the reminder on the rods Mike, it was too early for me to remember right off hand.
If your compression checked out ok, you could just swap parts onto your motor. Saying that though, it may be easier to pull them and just swap them.
One more thing, can you make enough on selling the SD to upgrade yours? If you don't sell the SD and use its motor, efuel, other parts, are you going to be sitting on the rest of the truck? Financially it seems to me if your compression check is ok, you'd be money ahead to sell it and just upgrade yours. Just some thoughts.
If your compression checked out ok, you could just swap parts onto your motor. Saying that though, it may be easier to pull them and just swap them.
One more thing, can you make enough on selling the SD to upgrade yours? If you don't sell the SD and use its motor, efuel, other parts, are you going to be sitting on the rest of the truck? Financially it seems to me if your compression check is ok, you'd be money ahead to sell it and just upgrade yours. Just some thoughts.
The other thing is the bank will get 3k of the proceeds if I sell it. I think I could get 9-10k out of the truck so I would have about 6-7k left over for mods. I'm looking at injectors, turbo, efuel, hpop, intercooler, on the OBS.
Hotshot
Joined: Feb 2009
Posts: 10,408
Likes: 75
From: Plankinton, SD
For sure, you should to studs too. My setup hit 39lbs of boost with stage ones and a turbo, I think I'm doing springs, studs, and pushrods next winter. 40psi is pretty much the "scary point" for the head gaskets without studs. Studs would be a LOT easier with the motor out. Glenn just did them with his motor in though, so it can be done for sure.
I guess if you can part out that other one and make your money back in a decent amount of time it may be worth swapping motors. You could do all your work on an engine stand then. Could be a lot of work swapping motors and parting out another truck, but sure can be done.
I honestly wouldn't be afraid of the miles if your compression checked out ok. It's up to you though, if you want the piece of mind having one with 90k less on it, and can financially make it work either way for you, then go for it. JMO.
edit: I'd compression check them both if you decide to swap them. Unless you know the history of the SD motor, you never know..
I guess if you can part out that other one and make your money back in a decent amount of time it may be worth swapping motors. You could do all your work on an engine stand then. Could be a lot of work swapping motors and parting out another truck, but sure can be done.
I honestly wouldn't be afraid of the miles if your compression checked out ok. It's up to you though, if you want the piece of mind having one with 90k less on it, and can financially make it work either way for you, then go for it. JMO.
edit: I'd compression check them both if you decide to swap them. Unless you know the history of the SD motor, you never know..
Thread Starter
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lost
Joined: Apr 2003
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From: Worland, WY
Thanks Darin. After doing a bunch more research and driving the SD around I am really leaning towards swapping it over and parting out the rest of the truck.
I'm trying to decide if I should go stage 1, 2, or 238 hybrids with the 38r. I use this truck for trailer pulling and I don't need it to win at the drag strip, I just want low EGT's, good pulling power and reliability. Darin, you put springs and push rods in yours right? What kind of money did those run you?
Should I do a different kit for the efuel or use the stock SD system?
Sorry for all the questions, I want to make sure I got everything lined out before I make my final decision.
I'm trying to decide if I should go stage 1, 2, or 238 hybrids with the 38r. I use this truck for trailer pulling and I don't need it to win at the drag strip, I just want low EGT's, good pulling power and reliability. Darin, you put springs and push rods in yours right? What kind of money did those run you?
Should I do a different kit for the efuel or use the stock SD system?
Sorry for all the questions, I want to make sure I got everything lined out before I make my final decision.
Hotshot
Joined: Feb 2009
Posts: 10,408
Likes: 75
From: Plankinton, SD
IIRC, the stock superduty isn't a regulated return system, it will work, but a return system is better from what I've read. I don't know what is involved in upgrading it.
Chris, I haven't put springs, pushrods, and studs in mine YET. With the boost numbers I hit on my test drive though, I feel I better to be safe. You're looking at 900-1000 iirc for all three. One more thing with mine, with the stock turbo I'd hit 1600 easy on a big wot run if I wanted to, with this one, it took forever to get to 1200. I was basically wide open in OD before I got there.
I'm not real familiar with the 38r, so I'm not sure what to recommend for injectors. I'd talk to Jim, he'll know what you should do.
edit: Have you thought about swapping motors completely? Put yours in the SD and sell it? Then buy a different efuel setup? Just wondering if it would be easier for you to sell the truck that way. I'd think it could be done. Maybe you have good access to sell the SD as parts, it was just another thought I had.
Chris, I haven't put springs, pushrods, and studs in mine YET. With the boost numbers I hit on my test drive though, I feel I better to be safe. You're looking at 900-1000 iirc for all three. One more thing with mine, with the stock turbo I'd hit 1600 easy on a big wot run if I wanted to, with this one, it took forever to get to 1200. I was basically wide open in OD before I got there.
I'm not real familiar with the 38r, so I'm not sure what to recommend for injectors. I'd talk to Jim, he'll know what you should do.
edit: Have you thought about swapping motors completely? Put yours in the SD and sell it? Then buy a different efuel setup? Just wondering if it would be easier for you to sell the truck that way. I'd think it could be done. Maybe you have good access to sell the SD as parts, it was just another thought I had.
Thread Starter
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lost
Joined: Apr 2003
Posts: 290
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From: Worland, WY
I was just reading about needing a regulated return. Riffraff sells a regulated return kit that is bolt on, link.
I wonder if I will need a new fuel pump to keep up with 238/100 hybrids if I go that route or even the 200/30s. I would like to be around 400-425hp and no more to stay as reliable as possible.
Darin, originally I was thinking about putting the OBS motor in the SD and selling it, but I think I would make more money selling parts. Not to mention all the extra work that it would take. I have had some interest in certain parts already.
Its hard to think of parting out a good usable truck, but its looking really like the best financial way of getting my OBS to where I want it. BUT I might be missing something, lol.
I wonder if I will need a new fuel pump to keep up with 238/100 hybrids if I go that route or even the 200/30s. I would like to be around 400-425hp and no more to stay as reliable as possible.
Darin, originally I was thinking about putting the OBS motor in the SD and selling it, but I think I would make more money selling parts. Not to mention all the extra work that it would take. I have had some interest in certain parts already.
Its hard to think of parting out a good usable truck, but its looking really like the best financial way of getting my OBS to where I want it. BUT I might be missing something, lol.
Hotshot
Joined: Feb 2009
Posts: 10,408
Likes: 75
From: Plankinton, SD
Just so you know, I'm probably not far away from 400hp now. I might be even hitting it. I'd like to dyno it sometime, just to know. Travis is running a SD pump with around 500hp, with 180/80 or 180/100 singleshots, I can never remember. IIRC that's about the max for them. Stage 2's will put you over 450 pretty easily. I'm not too familiar with hybrids.
Glenn and I have basically the same setup, except he has stage 2's and I have ones. Another 3-4 weeks and you can get a report on how these setups work towing, egt's, etc. We both tow about 16k. I don't know how soon you're looking at doing the work, just sayin'. I don't know how the 38r compares to the S366 we have, that would really be your only difference.
Glenn and I have basically the same setup, except he has stage 2's and I have ones. Another 3-4 weeks and you can get a report on how these setups work towing, egt's, etc. We both tow about 16k. I don't know how soon you're looking at doing the work, just sayin'. I don't know how the 38r compares to the S366 we have, that would really be your only difference.