'09 5.3 on the dyno again
#31
TECH Enthusiast
iTrader: (1)
Join Date: Nov 2005
Location: Northern CA
Posts: 727
Likes: 0
Received 0 Likes
on
0 Posts
Actually, if you read a little bit, you will see that the flat top pistons difference in volume from the dished pistons volume is greater than the 3cc gain in combustion chamber volume. Hence the .5 point increase in static compression ratio from 9.4 to 9.9. They Do Gain Compression, the L33's and new LY5's (the 5.3's in the 2007+ NNBS trucks) that is.
#32
Actually, if you read a little bit, you will see that the flat top pistons difference in volume from the dished pistons volume is greater than the 3cc gain in combustion chamber volume. Hence the .5 point increase in static compression ratio from 9.4 to 9.9. They Do Gain Compression, the L33's and new LY5's (the 5.3's in the 2007+ NNBS trucks) that is.
#33
Launching!
I was thinking about a turbo system in my '08 5.3, but after seeing these results this is very impressive and costs a whole lot less! Do you think that cam is too big for an extended cab z71? I'm looking to have at least 350hp daily driven. Don't mean to hijack the thread guys.
Keith
Keith
Last edited by KHester84; 02-28-2010 at 09:10 AM.
#35
13 Second Truck Club
iTrader: (1)
Yeah, I have a similar cam in my truck and it made great power and is VERY daily drivable. After i dyno tuned it tho. Check out my signature. The cam feels doggy down low but its just cuz it pulls SO much harder up top. I think i lost very little down low over stock.
#37
13 Second Truck Club
iTrader: (1)
Thanks! Yeah I'm really happy. But most ppl don't think that my truck really made that much. It does sound a little high for an LM7 5.3, but thats what the dyno said. It may be off a little, but even at 20 hp its still impressive. But yeah, i love the cam! We never saw any knock retard with 28 deg timing, even when it was running lean. I'd definitely recommend it to any one with a 5.3
#38
TECH Apprentice
iTrader: (5)
Join Date: Feb 2010
Location: Joliet, Illinois
Posts: 387
Likes: 0
Received 0 Likes
on
0 Posts
Hey guys, sorry for the noob question, but when you are refering to the new 5.3 to the old 5.3 what designates old/new? I would guess the reluctor ring teeth, but I am not sure.
#40
Welcome to the forum