Help 98 GMC Jimmy Swap. (Mods move if not correct place)
05-30-2016, 10:41 PM
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Help 98 GMC Jimmy Swap. (Mods move if not correct place) Hello All,
I have a 98 GMC Jimmy that currently has a Vortec 4.3l with 120+ miles. Now what started this event was when I was going to place a 350 V8 which you can find the details here. After a while I learned this may not be the best option as there is a motor called the “LS” which God himself pissed on and created there after greatness soon followed apparently. Thing is this swap or for that matter any swap open the door of so many damn questions. Some I could find answer to while others I have to open this thread to remotely hope for solid answers. The question goes for, handling performance with a V8 in the bay, fuel economy once the swap is complete, and would I need to adjust anything of the frame and/or drivetrain?
Now I am aware that a fully dressed V6 weights approx. 425 while the LS1 weights 530 roughly. I have recently and by that I mean today learned of the L33 but know little to the specs or weight. So this doesn’t drag out The engines I have considered LS1 (5.3l, 5.7l), L33 (4.8l, 5.3l), LS2 (5.7, 6.0), or anything LS line ( I have no idea if the numbers are right). Can any of these engines go into the Jimmy? If so will the 16% towards the nose of the SUV/Truck affect the handling of the truck’s drive? I was told that since I am choosing a LS that I will not need to lift the truck 2 inches as if I choose the 350 saving me from losing the aerodynamics of the truck. Also as the L33 is the 5.3 with an aluminum block and heads will the later year engine connect to my current 4L60E (once modded to take the increase of horse power/torque?
Moving on how will the swap affect my fuel performance? I am currently getting what I believe is 16-17 city no idea on highway as we really don’t have one here. Will the fuel economy drop? Will it increase? If driven like a granny was driving it how would the swap effect my consumption? If I needed to open it up would it be somewhat fair on my pockets. Could it handle a cross country trip from here to Ga? So far I hear 20–25 city/ highway as the engine doesn’t have to work as hard to move my vehicle.
Lastly with such an increase of power would I need to have my frame reinforced? Would I need to get performance pats for my driveline? Do my brake lines need to be done? Can my current 15” handle such a change? Should I overhaul everything on the suspension? I will be putting Bilsten shocks should I not get these? I have 4x4 and want to keep that is there a performance?
Whew, loaded but my stressing thoughts. I know many of have questions so I will try to answer as best as I can.
1. What type of Jimmy? A: 98 GMC Jimmy 4x4
2. What are your plans for this? A: DD
3. Are you doing the work or a shop? A: Shop $90 a hour
4. How much are you looking to spend? A: $10,000 I hope but expecting $20
In conclusion I hope to get as much as I can answered here so I don’t ask everyone I know too much where they stop talking to me.
Thank you all
I have a 98 GMC Jimmy that currently has a Vortec 4.3l with 120+ miles. Now what started this event was when I was going to place a 350 V8 which you can find the details here. After a while I learned this may not be the best option as there is a motor called the “LS” which God himself pissed on and created there after greatness soon followed apparently. Thing is this swap or for that matter any swap open the door of so many damn questions. Some I could find answer to while others I have to open this thread to remotely hope for solid answers. The question goes for, handling performance with a V8 in the bay, fuel economy once the swap is complete, and would I need to adjust anything of the frame and/or drivetrain?
Now I am aware that a fully dressed V6 weights approx. 425 while the LS1 weights 530 roughly. I have recently and by that I mean today learned of the L33 but know little to the specs or weight. So this doesn’t drag out The engines I have considered LS1 (5.3l, 5.7l), L33 (4.8l, 5.3l), LS2 (5.7, 6.0), or anything LS line ( I have no idea if the numbers are right). Can any of these engines go into the Jimmy? If so will the 16% towards the nose of the SUV/Truck affect the handling of the truck’s drive? I was told that since I am choosing a LS that I will not need to lift the truck 2 inches as if I choose the 350 saving me from losing the aerodynamics of the truck. Also as the L33 is the 5.3 with an aluminum block and heads will the later year engine connect to my current 4L60E (once modded to take the increase of horse power/torque?
Moving on how will the swap affect my fuel performance? I am currently getting what I believe is 16-17 city no idea on highway as we really don’t have one here. Will the fuel economy drop? Will it increase? If driven like a granny was driving it how would the swap effect my consumption? If I needed to open it up would it be somewhat fair on my pockets. Could it handle a cross country trip from here to Ga? So far I hear 20–25 city/ highway as the engine doesn’t have to work as hard to move my vehicle.
Lastly with such an increase of power would I need to have my frame reinforced? Would I need to get performance pats for my driveline? Do my brake lines need to be done? Can my current 15” handle such a change? Should I overhaul everything on the suspension? I will be putting Bilsten shocks should I not get these? I have 4x4 and want to keep that is there a performance?
Whew, loaded but my stressing thoughts. I know many of have questions so I will try to answer as best as I can.
1. What type of Jimmy? A: 98 GMC Jimmy 4x4
2. What are your plans for this? A: DD
3. Are you doing the work or a shop? A: Shop $90 a hour
4. How much are you looking to spend? A: $10,000 I hope but expecting $20
In conclusion I hope to get as much as I can answered here so I don’t ask everyone I know too much where they stop talking to me.
Thank you all
05-31-2016, 02:05 AM
#2
My advice is sell that Jimmy and do one of the following:
If you are looking for mpg-buy a Prius.
If you are looking for reasonable mpg in an suv with a bit of power for fun and towing-buy a clean,used soccer mom Tahoe, add a cam,exhaust and tune and put the rest of your $20k into beer and a good time.
If you are looking for mpg-buy a Prius.
If you are looking for reasonable mpg in an suv with a bit of power for fun and towing-buy a clean,used soccer mom Tahoe, add a cam,exhaust and tune and put the rest of your $20k into beer and a good time.
05-31-2016, 02:45 AM
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My advice is sell that Jimmy and do one of the following:
If you are looking for mpg-buy a Prius.
If you are looking for reasonable mpg in an suv with a bit of power for fun and towing-buy a clean,used soccer mom Tahoe, add a cam,exhaust and tune and put the rest of your $20k into beer and a good time.
If you are looking for mpg-buy a Prius.
If you are looking for reasonable mpg in an suv with a bit of power for fun and towing-buy a clean,used soccer mom Tahoe, add a cam,exhaust and tune and put the rest of your $20k into beer and a good time.
Hey buddy
I'm not looking to get dogged if that is how you are coming across. My money my truck can you help guide me in the proper direction or no? I hear this all too often and its annoying at this point. If at all by any means if you or anyone else for that matter dislikes this than might I ask of you to please do not respond.
Thank you
05-31-2016, 03:49 AM
#5
Do you have any idea how much the truck weighs? And are you planning on keeping it 4wheel drive? My 33 Ford weighs about 3700lbs and with a bone stock LS1 gets about 20mpg, my 71 C10 SWB with a 5.3 gets 17-18 all the time. I think with 4wd your mileage is probably going to remain about the same.
05-31-2016, 04:10 AM
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05-31-2016, 04:12 AM
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Do you have any idea how much the truck weighs? And are you planning on keeping it 4wheel drive? My 33 Ford weighs about 3700lbs and with a bone stock LS1 gets about 20mpg, my 71 C10 SWB with a 5.3 gets 17-18 all the time. I think with 4wd your mileage is probably going to remain about the same.
Roughly between 4,500 and 5,000 depending. Yes I intend to keep the 4x4.
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05-31-2016, 11:05 PM
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05-31-2016, 11:06 PM
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I did respond to you but that post is awaiting approval from a mod for some reason.
05-31-2016, 11:23 PM
#12
http://www.jagsthatrun.com/Pages/Che...NewBody-1.html
Current Performance sells most if not all of the swap parts needed and will do the install and has a great reputation.
http://www.currentperformance.com/pr...10-blazer-4wd/
06-01-2016, 12:27 AM
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06-01-2016, 12:28 AM
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This company for most of the info that you seek.
http://www.jagsthatrun.com/Pages/Che...NewBody-1.html
Current Performance sells most if not all of the swap parts needed and will do the install and has a great reputation.
http://www.currentperformance.com/pr...10-blazer-4wd/
http://www.jagsthatrun.com/Pages/Che...NewBody-1.html
Current Performance sells most if not all of the swap parts needed and will do the install and has a great reputation.
http://www.currentperformance.com/pr...10-blazer-4wd/
Thanks for the intel I am reading and signing up lol
06-01-2016, 12:34 AM
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Well it didn't post so I will try again. SO I ws going with PeformaBuilt Transmissions
Super Chevy suggest these guys. They suggest the Heavy Duty build and they will build for my engine type. Let me know your thoughts there. As for engine Nelson Racing Engine suggested I go with the 5.3 if I am worried about longevity of the build. They said the 6.0 is heavy but a top speed monster but would eat the fuel like crazy. I am almost in a happy medium with a 5.7 as they are easier to find.
06-01-2016, 02:27 AM
#19
Hey buddy
I'm not looking to get dogged if that is how you are coming across. My money my truck can you help guide me in the proper direction or no? I hear this all too often and its annoying at this point. If at all by any means if you or anyone else for that matter dislikes this than might I ask of you to please do not respond.
Thank you
I'm not looking to get dogged if that is how you are coming across. My money my truck can you help guide me in the proper direction or no? I hear this all too often and its annoying at this point. If at all by any means if you or anyone else for that matter dislikes this than might I ask of you to please do not respond.
Thank you
http://www.s10forum.com/forum/lsx-discussion/
06-02-2016, 12:03 AM
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Just a friendly jab to see if you are for real,once you get the oil pan issue resolved,the rest is pretty straightforward.Lots of good reading here,almost did a S truck 4x4 swap or two,but could never find an oil pan solution that I liked.However,I will stand by my opinion that spending $10-20k on a twenty year old Jimmy and being concerned about 2-3 mpg difference is kinda silly...
http://www.s10forum.com/forum/lsx-discussion/
http://www.s10forum.com/forum/lsx-discussion/
Well getting 2-3 is not going to happen unless I am just flooring it. I cannot find a LS 5.3 aluminum engine unless it is a Corvette engine. Seeing as I can not find that much information on that kind of swap I am forced to move over to a 5.7, 6.0, or higher. Though I get confused by the numbers and "label" I am thinking on getting an Escalade motor.