Riddle me this 4.8 vortec
#21
TECH Apprentice
iTrader: (1)
Wow. What happened to this thread? I'm afraid to give a response. Please don't shoot me, I'm just a messenger. @Toby Warford Lq9's are great. I had a very stout LQ9, bored .040, 228/288, .600/.600 110 centerline. This engine shredded the tires and loved 4500+ rpms. I had a few LM7's. I love these engines. 5.3's are the Most bang for your bucks. Most 5.3's will can eat SBC 350's with a simple cam swap and tune, cheaply. Last but not least, the most fun of all, the 4.8. The smallest puppy of the bunch. The 4.8, is very peppy. I loved the one I had(needs a rebuild). A good cam, a good tune, with open exhaust, and if you can afford it, later down the road, some port work or new cylinder heads, you will be amazed at how well they run. Dont shoot me, good luck with your swap. Clark.
#22
Wow. What happened to this thread? I'm afraid to give a response. Please don't shoot me, I'm just a messenger. @Toby Warford Lq9's are great. I had a very stout LQ9, bored .040, 228/288, .600/.600 110 centerline. This engine shredded the tires and loved 4500+ rpms. I had a few LM7's. I love these engines. 5.3's are the Most bang for your bucks. Most 5.3's will can eat SBC 350's with a simple cam swap and tune, cheaply. Last but not least, the most fun of all, the 4.8. The smallest puppy of the bunch. The 4.8, is very peppy. I loved the one I had(needs a rebuild). A good cam, a good tune, with open exhaust, and if you can afford it, later down the road, some port work or new cylinder heads, you will be amazed at how well they run. Dont shoot me, good luck with your swap. Clark.
Id just like to know what I can realistically expect with the few things I have listed.
#24
Restricted User
4.8 and 5.3 pricing are very similar.
The power outputs are very close, with the 5.3 making more torque.
The fuel economy between the two is very close, within ~2 mpg in most setups.
For a truck, it makes more sense to go 5.3 for the part throttle torque.
In a lighter vehicle that will see more RPM, the 4.8 may make more sense.
I just finished a 5.3 with a mild Howard's cam and long tubes. 100% stock otherwise. Made 312whp through a 4L60e on a Dyno Dynamics (heart breaker dyno) through a 2" crimp-bend exhaust (1 5/8" in the bends). Same combo with 799 heads and TBSS intake made 426 HP on engine dyno. The total cost of the swap was $2500 including a rebuilt 5.3 top end, a completely rebuilt 4l60e, conversion to fuel injection, electric fans, etc. You could easily do it with much less depending on a few factors.
You MIGHT save $200 on the entire swap going with a 4.8.
The power outputs are very close, with the 5.3 making more torque.
The fuel economy between the two is very close, within ~2 mpg in most setups.
For a truck, it makes more sense to go 5.3 for the part throttle torque.
In a lighter vehicle that will see more RPM, the 4.8 may make more sense.
I just finished a 5.3 with a mild Howard's cam and long tubes. 100% stock otherwise. Made 312whp through a 4L60e on a Dyno Dynamics (heart breaker dyno) through a 2" crimp-bend exhaust (1 5/8" in the bends). Same combo with 799 heads and TBSS intake made 426 HP on engine dyno. The total cost of the swap was $2500 including a rebuilt 5.3 top end, a completely rebuilt 4l60e, conversion to fuel injection, electric fans, etc. You could easily do it with much less depending on a few factors.
You MIGHT save $200 on the entire swap going with a 4.8.
#25
4.8 and 5.3 pricing are very similar.
The power outputs are very close, with the 5.3 making more torque.
The fuel economy between the two is very close, within ~2 mpg in most setups.
For a truck, it makes more sense to go 5.3 for the part throttle torque.
In a lighter vehicle that will see more RPM, the 4.8 may make more sense.
I just finished a 5.3 with a mild Howard's cam and long tubes. 100% stock otherwise. Made 312whp through a 4L60e on a Dyno Dynamics (heart breaker dyno) through a 2" crimp-bend exhaust (1 5/8" in the bends). Same combo with 799 heads and TBSS intake made 426 HP on engine dyno. The total cost of the swap was $2500 including a rebuilt 5.3 top end, a completely rebuilt 4l60e, conversion to fuel injection, electric fans, etc. You could easily do it with much less depending on a few factors.
You MIGHT save $200 on the entire swap going with a 4.8.
The power outputs are very close, with the 5.3 making more torque.
The fuel economy between the two is very close, within ~2 mpg in most setups.
For a truck, it makes more sense to go 5.3 for the part throttle torque.
In a lighter vehicle that will see more RPM, the 4.8 may make more sense.
I just finished a 5.3 with a mild Howard's cam and long tubes. 100% stock otherwise. Made 312whp through a 4L60e on a Dyno Dynamics (heart breaker dyno) through a 2" crimp-bend exhaust (1 5/8" in the bends). Same combo with 799 heads and TBSS intake made 426 HP on engine dyno. The total cost of the swap was $2500 including a rebuilt 5.3 top end, a completely rebuilt 4l60e, conversion to fuel injection, electric fans, etc. You could easily do it with much less depending on a few factors.
You MIGHT save $200 on the entire swap going with a 4.8.
For about the 5th time, I don't want the damned 5.3. the only way I'm getting a 5.3 is is a smoking deal come up on one.
The truck its going, and me as the driver and my end goals, is perfect for a 4.8. end of story.
If I wanna go all out power, I'll get an lq9 or maybe an L33 and throw my wallet at it. Then boost it if that's not enough. Then throw juice at it because why not. But thats not the objective here.
All I wanted to know was a simple question on what a combo would or might make. That's IT!! don't know why that's so hard for people to comprehend.
#28
Restricted User
its really pathetic how many people either can't read, or their reading comprehension is very low.
For about the 5th time, I don't want the damned 5.3. the only way I'm getting a 5.3 is is a smoking deal come up on one.
The truck its going, and me as the driver and my end goals, is perfect for a 4.8. end of story.
If I wanna go all out power, I'll get an lq9 or maybe an L33 and throw my wallet at it. Then boost it if that's not enough. Then throw juice at it because why not. But thats not the objective here.
All I wanted to know was a simple question on what a combo would or might make. That's IT!! don't know why that's so hard for people to comprehend.
For about the 5th time, I don't want the damned 5.3. the only way I'm getting a 5.3 is is a smoking deal come up on one.
The truck its going, and me as the driver and my end goals, is perfect for a 4.8. end of story.
If I wanna go all out power, I'll get an lq9 or maybe an L33 and throw my wallet at it. Then boost it if that's not enough. Then throw juice at it because why not. But thats not the objective here.
All I wanted to know was a simple question on what a combo would or might make. That's IT!! don't know why that's so hard for people to comprehend.
#29
Once AGAIN!, I'm building a 4.8. all's I wanna know is what it might make when I get the mods done to it have listed.
If I wanted to know which engine to start with, I would have asked that to begin with.
#30
#31
The guy wants to buy a 4.8 for $200 less than a similar 5.3 and wants to know if spending $700 on throwing a cam in it along with associated mods will make approximately stock 5.3 hp without the burden of additional torque. Why is that so hard to understand? Masterful trolling. Kudos to the OP.
#32
TECH Addict
So other than the "its different factor" which I get,, I think the thing that makes a lot of folks twitch is economics, and the way most of us would go. Hmm.
I can't tell a significant difference in 4.8 vs 5.3 pricing (Iron block) in my area, they seem to roll out at 2k to 3500 for a dropout. Your not losing anything with the 4.8 (Well besides a little power)
SOo hopefully you get through the swap and we get to see how that works out, get rid of the dead weight on the truck and I could se it being a fun toy... Id even keep the 727 tranny and just kit it.. I've seen them behind BIG 401 motors and they seem to take it..save a little work as long as its the mechanical 727torqueflight which a Dakota may not be.. can't remember.
I can't tell a significant difference in 4.8 vs 5.3 pricing (Iron block) in my area, they seem to roll out at 2k to 3500 for a dropout. Your not losing anything with the 4.8 (Well besides a little power)
SOo hopefully you get through the swap and we get to see how that works out, get rid of the dead weight on the truck and I could se it being a fun toy... Id even keep the 727 tranny and just kit it.. I've seen them behind BIG 401 motors and they seem to take it..save a little work as long as its the mechanical 727torqueflight which a Dakota may not be.. can't remember.
#33
The guy wants to buy a 4.8 for $200 less than a similar 5.3 and wants to know if spending $700 on throwing a cam in it along with associated mods will make approximately stock 5.3 hp without the burden of additional torque. Why is that so hard to understand? Masterful trolling. Kudos to the OP.
#34
So other than the "its different factor" which I get,, I think the thing that makes a lot of folks twitch is economics, and the way most of us would go. Hmm.
I can't tell a significant difference in 4.8 vs 5.3 pricing (Iron block) in my area, they seem to roll out at 2k to 3500 for a dropout. Your not losing anything with the 4.8 (Well besides a little power)
SOo hopefully you get through the swap and we get to see how that works out, get rid of the dead weight on the truck and I could se it being a fun toy... Id even keep the 727 tranny and just kit it.. I've seen them behind BIG 401 motors and they seem to take it..save a little work as long as its the mechanical 727torqueflight which a Dakota may not be.. can't remember.
I can't tell a significant difference in 4.8 vs 5.3 pricing (Iron block) in my area, they seem to roll out at 2k to 3500 for a dropout. Your not losing anything with the 4.8 (Well besides a little power)
SOo hopefully you get through the swap and we get to see how that works out, get rid of the dead weight on the truck and I could se it being a fun toy... Id even keep the 727 tranny and just kit it.. I've seen them behind BIG 401 motors and they seem to take it..save a little work as long as its the mechanical 727torqueflight which a Dakota may not be.. can't remember.
As far as transmission, I'll be going with a stick shift. Been too long since I've had a standard transmission, it's time and this would be the perfect thing to have it in. The Dakota's got a variation of the 727, though not nearly as strong.
#35
Teching In
back on track guys.. heres a good little read.
make sure to read the whole thing for the surprise ending
http://www.hotrod.com/articles/hrdp-...g-bang-theory/
SPOILER:
-- They always read how strong these 5.3 are and kept hearing that quadruple digit power out of the junkyard so they want to put the stories to the test and figure out what the true limit of the engine was able to handle out the box. They took the stock engine well over 1k and when inspecting what the final failure was ( somthing to do with ignition if i remeber correctly its been awhile since i read it) they realized that the pistons were off. Sure as **** they had ended up doing the whole test on 4.8.
4.8 just likes to be revved more to make the power she likes to be ran up and past 7k
make sure to read the whole thing for the surprise ending
http://www.hotrod.com/articles/hrdp-...g-bang-theory/
SPOILER:
-- They always read how strong these 5.3 are and kept hearing that quadruple digit power out of the junkyard so they want to put the stories to the test and figure out what the true limit of the engine was able to handle out the box. They took the stock engine well over 1k and when inspecting what the final failure was ( somthing to do with ignition if i remeber correctly its been awhile since i read it) they realized that the pistons were off. Sure as **** they had ended up doing the whole test on 4.8.
4.8 just likes to be revved more to make the power she likes to be ran up and past 7k
#37
lol that's what I was thinking but I don't know anything apparently. For that price that better be an lq9 and the 4l80e with all the wiring and computers to go with it.