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LSx Stock Dyno Graphs 4.8L, 5.3L, 5.7L, 6.0L LQ9.

159K views 84 replies 41 participants last post by  jayjay334 
#1 · (Edited by Moderator)
Hey guys, I thought I would share some of the information Ive gathered over time to help anyone that wants to get an idea the power difference between the major LSx based engines. I have yet to dyno a 6.0L LQ4. I will add them if I ever get the chance to.

All testing was done on the same dyno, all were automatics and basically stock.




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#2 · (Edited)
Re: LSx Stock Dyno Graphs 4.8L, 5.3L, 5.7L, 6.0L LS2.

Note that the 4.8L is by far the lowest, it would probably take a lot of money in parts to make it back up to the 5.3Ls stock numbers.

Remembering there is practically no price difference between a 4.8L and a 5.3L. Go with the 5.3L!
 
#8 ·
Re: LSx Stock Dyno Graphs 4.8L, 5.3L, 5.7L, 6.0L LS2.

so what are the peak numbers for the baseline 5.3l? and is this a mustang dyno?
241hp @ 5300RPM and 264lbft @ 4200RPM on the 5.3L

These are all done on a Superflow dyno. The numbers all would be MUCH higher on a Dynojet.
 
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#7 · (Edited)
Re: LSx Stock Dyno Graphs 4.8L, 5.3L, 5.7L, 6.0L LS2.

so theres really not that much of a difference in power between the ls1 and 5.3?
Not a ton... Dollar for dollar I would take the 5.3L still between the 4.8L, 5.3L, and 5.7L. Overall I would take the 6.0L obviously.
 
#10 ·
Re: LSx Stock Dyno Graphs 4.8L, 5.3L, 5.7L, 6.0L LS2.

and what was the 6.0 at for #s
292HP @ 5500RPM and 317lbft @ 4300RPM
 
#16 ·
Re: LSx Stock Dyno Graphs 4.8L, 5.3L, 5.7L, 6.0L LS2.

They were all in stock vehicles, except the 6.0 was in my truck.
 
#18 ·
Re: LSx Stock Dyno Graphs 4.8L, 5.3L, 5.7L, 6.0L LS2.

And a t-56 might make a bit more than the slushbox 4l60e's
 
#20 ·
Re: LSx Stock Dyno Graphs 4.8L, 5.3L, 5.7L, 6.0L LS2.

I have yet to dyno a 6.0L LQ4 or LQ9. I will add them if I ever get the chance to.
:tup:

Numbers can vary a ton from dyno to dyno.....
 
#23 · (Edited by Moderator)
Re: LSx Stock Dyno Graphs 4.8L, 5.3L, 5.7L, 6.0L LS2.

lol, i like how everyone doesnt like 4.8L's

I have one in my silvy that I took to get a dyno after my cam swap and it clocked in with 309rwhp. FYI: done on the 22's and a stall converter.
http://imageshack.us

I'm no where near full bolt ons yet. I'm about to slap in a lq4 in the silvy and put the 4.8L in the s10.. So far the best i've done at the 1/8th track is 8.97@74mph just imagine if that was in a lighter s10 pickup
 
#24 ·
Re: LSx Stock Dyno Graphs 4.8L, 5.3L, 5.7L, 6.0L LS2.

Like I said, dynos vary greatly in the numbers they put out. To compare you need the same dyno, otherwise its just a number.

I could correct them to 400hp if I wanted to.
 
#25 ·
Re: LSx Stock Dyno Graphs 4.8L, 5.3L, 5.7L, 6.0L LS2.

you are correct.. I just wanted to show that 4.8L's have potential too just like the bigger motors. Seems like they dont get enough respect but whatever.. The fact that you can swap everything over gives people so many options to go with when building a motor like the ls series v8 motors.
 
#28 · (Edited)
Re: LSx Stock Dyno Graphs 4.8L, 5.3L, 5.7L, 6.0L LS2.

4.8L's have potential too just like the bigger motors. Seems like they dont get enough respect but whatever..
It has nothing to do with respect, it purely a potential factor. A 5.3, 5.7, or 6.0L will gain the same amount or better if they all had the same bolt ons.

This thread was purely to show people where their starting point would be when trying to decide which engine to buy Since most people buy factory pull outs and not built race engines. Making a smart desicion will get everyone the most HP/dollar.
 
#27 ·
Re: LSx Stock Dyno Graphs 4.8L, 5.3L, 5.7L, 6.0L LS2.

i like the 4.8s... anyone want to give me one? :D
Sure, Ill pay all the shipping too. Just send your engine back to me in return, remembering Im being nice enough to pick up all the shipping charges...
 
#29 ·
Re: LSx Stock Dyno Graphs 4.8L, 5.3L, 5.7L, 6.0L LS2.

For you guys looking into a 4.8 or a 5.3 I know the 05 and newer model lr4/lm7 mills were changed to a fully floating piston with locks. Probably dont mean much but I have an 05 silvy with the 5.3 and it has never had the infamous piston slap on cold start or the spark knock sound on warm start issues.
 
#30 ·
Re: LSx Stock Dyno Graphs 4.8L, 5.3L, 5.7L, 6.0L LS2.

And the newer 5.3Ls come with the #243 heads (LS6/LS2) w/ 210cc runners but most likely without the lightened valves though.
 
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