trying to get 350 to 400 hp out of my 5.3 any advice.???
05-15-2010, 02:08 AM
#1
Teching In
Thread Starter
Join Date: Jun 2009
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
trying to get 350 to 400 hp out of my 5.3 any advice.??? I have a iron block 5.3 with a ls1 intake and tb.what would be a ideal cam and upgrades to get close to these numbers without a cylinder bore..... thanks fellas
05-15-2010, 06:58 AM
#2
10 Second Club
iTrader: (6)
Join Date: Mar 2007
Location: Fuquay Varina, NC
Posts: 952
Likes: 0
Received 0 Likes
on
0 Posts
I have a 4.8 in a 2007 silverado that runs 13.70's NA. I dont know the horse power but i'm sure its at least 300 at the wheels. A friend dynoed 276 with his 5.3 with just header and a stall conveter and CAI.
Mods on my 4.8
243 heads
TR 220 cam
CAI
pace setter long tube headers
Here's a vid on how it sounds before the rear end upgrade and then one at the track after. Hope this helps.\
http://www.youtube.com/watch?v=fMxEs3LeFgU
http://www.youtube.com/watch?v=JTcXMh3Yljc
Mods on my 4.8
243 heads
TR 220 cam
CAI
pace setter long tube headers
Here's a vid on how it sounds before the rear end upgrade and then one at the track after. Hope this helps.\
http://www.youtube.com/watch?v=fMxEs3LeFgU
http://www.youtube.com/watch?v=JTcXMh3Yljc
05-15-2010, 09:15 AM
#3
I have a 4.8 in a 2007 silverado that runs 13.70's NA. I dont know the horse power but i'm sure its at least 300 at the wheels. A friend dynoed 276 with his 5.3 with just header and a stall conveter and CAI.
Mods on my 4.8
243 heads
TR 220 cam
CAI
pace setter long tube headers
Mods on my 4.8
243 heads
TR 220 cam
CAI
pace setter long tube headers
I did a few calculations based on your times in the second vid...
A typical 2007 Silverado weighs around 4211 lbs according to a google search.
I assumed you weigh around 180 to 200 with helmet and whatever extra happens to be in the truck.
Your time was 14.74 (typo, time should be 13.74, all math was based on 13.74) and the MPH looked like 98
Running that through this converter it said:
"Your HP computed from your vehicle ET is 301.73 rear wheel HP and 335.26 flywheel HP."
"Your HP computed from your vehicle MPH is 298.48 rear wheel HP and 331.64 flywheel HP."
Not too shabby for a heavy truck with very little done to it.
Last edited by gofastwclass; 05-16-2010 at 08:08 AM. Reason: Time of 14.74 should be 13.74... updated text.
05-15-2010, 09:48 AM
#4
Registered User
Join Date: Mar 2010
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
I always lol'r when I read not to bother with the 4.8 and wait to find a 5.3. I found a 4.8 out of a '97 Express van for my '86 trans am. The factory rated it 285 hp which is plenty for DD duties
I can always mod it later.
I can always mod it later.
05-15-2010, 10:24 AM
#6
TECH Fanatic
iTrader: (17)
Join Date: Jan 2007
Location: San Diego, CA
Posts: 1,349
Likes: 0
Received 0 Likes
on
0 Posts
Go check out the sister site Performance trucks.net linked at the top of the page..plenty of guys running fast 5.3's over there...
-Comp 212/218 high lift -or- TR220
-Pac 1518 -or- Comp 918's
-PRC 59cc 5.3 heads -or- Patriot 5.3's (both cnc'd)
ported stock t-body,lt headers,2600-3000 stall,intake/exhaust
all the above are proven 5.3 performers imho.....
-Comp 212/218 high lift -or- TR220
-Pac 1518 -or- Comp 918's
-PRC 59cc 5.3 heads -or- Patriot 5.3's (both cnc'd)
ported stock t-body,lt headers,2600-3000 stall,intake/exhaust
all the above are proven 5.3 performers imho.....
05-15-2010, 11:20 AM
#7
10 Second Club
iTrader: (6)
Join Date: Mar 2007
Location: Fuquay Varina, NC
Posts: 952
Likes: 0
Received 0 Likes
on
0 Posts
Not bad.
I did a few calculations based on your times in the second vid...
A typical 2007 Silverado weighs around 4211 lbs according to a google search.
I assumed you weigh around 180 to 200 with helmet and whatever extra happens to be in the truck.
Your time was 14.74 and the MPH looked like 98
Running that through this converter it said:
"Your HP computed from your vehicle ET is 301.73 rear wheel HP and 335.26 flywheel HP."
"Your HP computed from your vehicle MPH is 298.48 rear wheel HP and 331.64 flywheel HP."
Not too shabby for a heavy truck with very little done to it.
I did a few calculations based on your times in the second vid...
A typical 2007 Silverado weighs around 4211 lbs according to a google search.
I assumed you weigh around 180 to 200 with helmet and whatever extra happens to be in the truck.
Your time was 14.74 and the MPH looked like 98
Running that through this converter it said:
"Your HP computed from your vehicle ET is 301.73 rear wheel HP and 335.26 flywheel HP."
"Your HP computed from your vehicle MPH is 298.48 rear wheel HP and 331.64 flywheel HP."
Not too shabby for a heavy truck with very little done to it.
I must have typo'd the time in the forum because the math comes out right with 13.74... I'll edit my post. 
