Fastest naturally aspirated 5.3?
10-12-2004, 11:45 AM
#31
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Originally Posted by derek_silvy
Are you saying that a 5.3L is good for 6600-6700?
To me that seems to high because alluminum LS1s are revving to what, 6800 or so stock? This is with a rotating assembly that is lighter than our iron components.
To me that seems to high because alluminum LS1s are revving to what, 6800 or so stock? This is with a rotating assembly that is lighter than our iron components.
10-12-2004, 12:30 PM
#32
derek_silvy-I'm finally gonna get it dyno'd next week, i'm thinking around 340 rwhp. any other guesses? I will have to check my slips to see i don't remember my 1/8 mile.
Tiburon- correct, the PI was a 9 1/2'' w/no towing capacity, very loose. It's flash point was 3200. Check out the comparison chart on the yank web site.
Tiburon- correct, the PI was a 9 1/2'' w/no towing capacity, very loose. It's flash point was 3200. Check out the comparison chart on the yank web site.
10-12-2004, 01:24 PM
#33
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if you read thru the automatic tranny section of this site, you will see where almost all of the vigs are flashing higher than the advertised.
so, it makes sense to me
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I bet you dyno 340-350. It'll be interesting to see. Especially once Reaper gets his heads on then runs a dyno pass. Be neat to compare since yoru setups are nearly identical except the head porting.
so, it makes sense to me
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I bet you dyno 340-350. It'll be interesting to see. Especially once Reaper gets his heads on then runs a dyno pass. Be neat to compare since yoru setups are nearly identical except the head porting.
10-12-2004, 01:42 PM
#34
Originally Posted by derek_silvy
You hit a 13.80 @ 97 with bolt ons... naturally aspirated?
Not a "bolt on" s/c or n2o kit?
Not a "bolt on" s/c or n2o kit?
10-12-2004, 03:14 PM
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hey man go pick up the november issue of car craft and the october too if it is possible and read "Little Bro" parts 1 and 2. in part 2 they made 458hp(flywheel) at 6600rpm. its extensive mods but 458 is not bad. their graph shows the last recorded engine rpm to be 6800 and making 438hp at that rpm. there is really some awesome stuff in there about the 5.3. trust me pushing the engine past 6k sounds crazy to me too.
Originally Posted by derek_silvy
Are you saying that a 5.3L is good for 6600-6700?
To me that seems to high because alluminum LS1s are revving to what, 6800 or so stock? This is with a rotating assembly that is lighter than our iron components.
If you are correct and the LM7 can reliabily rev to 6500+, then why am I shifting at 5900 or 6000... i mean, my tranny is good to like 7700? I'm cutting that LS6 cam off by about 400 rpm right now, and I wonder if I am going to REALLY be asking for it to have Herter raise that shiftpoint to 6500. I am just soooo scared of spinning a bearing or something like that. I could probobly rebuild it myself, but I don't need that cost right now....
Also, @ what RPM should I see valve float w/ ls6 cam, springs, pushrods, and retainers...
To me that seems to high because alluminum LS1s are revving to what, 6800 or so stock? This is with a rotating assembly that is lighter than our iron components.
If you are correct and the LM7 can reliabily rev to 6500+, then why am I shifting at 5900 or 6000... i mean, my tranny is good to like 7700? I'm cutting that LS6 cam off by about 400 rpm right now, and I wonder if I am going to REALLY be asking for it to have Herter raise that shiftpoint to 6500. I am just soooo scared of spinning a bearing or something like that. I could probobly rebuild it myself, but I don't need that cost right now....
Also, @ what RPM should I see valve float w/ ls6 cam, springs, pushrods, and retainers...
10-12-2004, 03:23 PM
#37
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Thunder Racing makes it.
You'd probably see peak around 7400rpm and would need to carry it out a bit further to help with the narrow power band.
Its big. Alot of the 346ci guys use it for their cam-only setups.
24X duration .6XX lift. @ .050
You'd probably see peak around 7400rpm and would need to carry it out a bit further to help with the narrow power band.
Its big. Alot of the 346ci guys use it for their cam-only setups.
24X duration .6XX lift. @ .050
10-12-2004, 05:54 PM
#38
Originally Posted by 12sec.5.3
derek_silvy-I'm finally gonna get it dyno'd next week, i'm thinking around 340 rwhp. any other guesses? I will have to check my slips to see i don't remember my 1/8 mile.
Tiburon- correct, the PI was a 9 1/2'' w/no towing capacity, very loose. It's flash point was 3200. Check out the comparison chart on the yank web site.
Tiburon- correct, the PI was a 9 1/2'' w/no towing capacity, very loose. It's flash point was 3200. Check out the comparison chart on the yank web site.
. If you dyno 340 hp I will be sick, but that will be good for you. I say 320 hp. Don't take that the wrong way, Its just a guess. Will you be able to post the dynograph?
10-12-2004, 07:01 PM
#39
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derek, the 5.3 has the same inards as the 5.7, same crank and same rods. The pistons are smaller diameter, which means they are even lighter than the 5.7's.
I reved my motor to 6500 with a 216/220 and ls6 springs. I swapped out the ls6 springs for 918's though, so I don't worry anymore.
I reved my motor to 6500 with a 216/220 and ls6 springs. I swapped out the ls6 springs for 918's though, so I don't worry anymore.
10-12-2004, 09:00 PM
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Originally Posted by Flyer
derek, the 5.3 has the same inards as the 5.7, same crank and same rods. The pistons are smaller diameter, which means they are even lighter than the 5.7's.
I reved my motor to 6500 with a 216/220 and ls6 springs. I swapped out the ls6 springs for 918's though, so I don't worry anymore.
I reved my motor to 6500 with a 216/220 and ls6 springs. I swapped out the ls6 springs for 918's though, so I don't worry anymore.
Really?
You mean the crank, rods, rod bolts, main caps, and main bolts are the exact same, even the same material, but the pistons are just smaller?
What is the "claimed" (by GM) redline of an LS1? What are the LS1 guys REALLY, SAFELY revving to w/o changing the rod bolts?
The cam really pulls hardest at 5K+ and keeps on pulling even though it is cut off @ 6K. I wonder how much power I could pick up with a 6300 shift point. Or will the heads even flow enough to make power @ those RPMs?