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10-11-2018, 09:00 PM | #1 |
Registered User
Join Date: Dec 2017
Location: Brandon Manitoba
Posts: 10
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Building a 5.3 looking for horsepower
I have already done a LS swap in my 72 last winter and love it, only issue I have is I want more power. I installed a 4.8 last winter because that is what I had with a 4L80E. I have purchased a 2007 5.3 now and want to build it for more power so I am looking for recommendations on building it to get as much power as I can for daily use. So if anyone has any recommendations on cam shaft, stall converter etc. please share what you think. Thanks
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10-11-2018, 09:06 PM | #2 |
meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
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Re: Building a 5.3 looking for horsepower
Daily use in old Canadia? Probably a procharger or a maggie. I guess it depends how high your looking to get (and how much you want to spend). You can bolt on a supercharger and still start the thing in January.
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD
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10-11-2018, 09:16 PM | #3 |
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Join Date: Dec 2017
Location: Brandon Manitoba
Posts: 10
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Re: Building a 5.3 looking for horsepower
I would love to do a supercharger but by the time I bought a Magnusson and tuned it I would be $10000 with our crappy dollar. So I am leaning towards less expensive mods.
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10-11-2018, 09:47 PM | #4 |
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Join Date: May 2012
Location: horseheads,ny rust belt
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Re: Building a 5.3 looking for horsepower
always hear good basic cam / springs / headers and tune get you easy 125-150ish hp and still keep fuel mileage up near stock .
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77-k30lb BIG truck build . 87-k30lb budget beater build . 85-k30lb the plow machine build . 85-c10sb summer fun toy . ----------------------------- HOLLEY SNIPER efi = worst case of p.i.t.a i ever had . EDELBROCK pro flo 4 = best deal going so far . love my setup works great. |
10-12-2018, 08:03 AM | #5 |
Senior Member
Join Date: Feb 2014
Location: new smyrna beach fl / 29 palms cal
Posts: 1,727
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Re: Building a 5.3 looking for horsepower
Just about anything you did to it you’re going to have to have it tuned turbos are pretty inexpensive and can make big horse power even on a stock motor
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10-12-2018, 09:18 AM | #6 |
Registered User
Join Date: Jun 2005
Location: Vancouver
Posts: 111
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Re: Building a 5.3 looking for horsepower
Whats your budget? First I would get valvesprings and a camshaft, you'll want to do these anyways if you turbo it. I would wait on picking a converter until you know your final HP.
You could also try to find a cheap 6.0.
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GIZZmotorsports on YouTube & my panel truck build '69 c10 panel, '75 c35 flatdeck car hauler |
10-12-2018, 10:12 AM | #7 |
Post Whore
Join Date: May 2015
Location: Alabama
Posts: 14,670
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Re: Building a 5.3 looking for horsepower
This is a good read.....https://www.hotrod.com/articles/hrdp...g-bang-theory/....
Your 4.8 can build Some big hp numbers
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Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
10-12-2018, 08:13 PM | #8 |
Registered User
Join Date: Dec 2017
Location: Brandon Manitoba
Posts: 10
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Re: Building a 5.3 looking for horsepower
Thinking more along the lines of camshaft, valve springs and maybe porting heads? Intake and bigger injectors if there was anything to gain. Question is what is the best cam to go with? I would run a stall converter too.
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10-12-2018, 09:56 PM | #9 |
Post Whore
Join Date: May 2015
Location: Alabama
Posts: 14,670
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Re: Building a 5.3 looking for horsepower
Unless you want a intake for show, a truck intake will flow very good....you can contact btr cams..and others...they will advise you ...i asked a similar question and got multiple answers...i called btr, told them what i had and what I wanted ..they hooked me up with a good cam and springs...no surprise ,when it came I had comp cams on the box...
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Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
10-12-2018, 11:52 PM | #10 |
Registered User
Join Date: Mar 2017
Location: Edmonton
Posts: 390
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Re: Building a 5.3 looking for horsepower
Im super happy with my ly6 build . Freshened up bottom end and heads are basically ls3 heads, Tsp stg 2 VVT cam, springs, ls3 intake and injectors, speed engineering 1 7/8'' headers. Engine rips good im probably into engine for 4-5 gs all said and done
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10-13-2018, 05:51 PM | #11 |
Registered User
Join Date: Dec 2017
Location: Brandon Manitoba
Posts: 10
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Re: Building a 5.3 looking for horsepower
I am leaning towards a BTR stage 3 truck cam, springs, trunnion kit, port the heads, headers and a stall converter as of now. Obviously get it tuned. Not sure what kind of power to expect, hopefully 450ish at crank or more???????? I am running 3.73 gears and a 4L80E. Any other ideas? Thanks
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10-16-2018, 11:39 AM | #12 |
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Join Date: Aug 2012
Location: Northeast KS
Posts: 1,789
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Re: Building a 5.3 looking for horsepower
I like the BTR series of "drop-in" Truck Cams, keep in mind, the more you cam an engine, the lesser the street manners.
Since the beginning of time, most people have a tendency to overcam an engine to get the "lopey" sound, rather than the desired results of usable power. I don't think head porting will gain you good value in hp for $$'s. 2007 5.3 means you might already have 243/799 heads, should be good to go, if not, spend your money on a set of those instead of the port job. What size of tire are you running with your 3.73 gears?
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1999 GMC Suburban K2500 SLT, 454/4L80E 1991 Z/28, 6.0L/T56 1949 GMC 250, S10 Frame, 6.0L/4L80E Instagram @aceshighspeedshop |
10-16-2018, 05:41 PM | #13 |
Registered User
Join Date: Nov 2000
Location: Huntsville Ontario Canada
Posts: 4,051
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Re: Building a 5.3 looking for horsepower
For daily use i would be chosing a very mild cam and focus more on gear ratio and proper final.drive ratio for performance. The diffirence i feel between my 2 swap is amazing and it only because the faster one runs 250rpm higher on the hwy. My 6.0 with 3:73 and 32" tire is sluggish all around till 120 km
I would aim for 2200 plus at 100 km.
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1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD |
10-16-2018, 07:08 PM | #14 |
Registered User
Join Date: Dec 2017
Location: Brandon Manitoba
Posts: 10
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Re: Building a 5.3 looking for horsepower
I am running 29" tall rear tire.
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10-17-2018, 12:32 PM | #15 |
Almost Satisfied
Join Date: Mar 2002
Location: Springfield, MO
Posts: 2,932
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Re: Building a 5.3 looking for horsepower
I have a 6.0 and went with the BTR Stage IV. They told me that would add about 75hp to the engine. I added the large tube headers. That is supposed to add another 20 -25hp. I'm hoping to hit 400hp once it is tuned. I don't think you will be close to 450hp with a stage 3 cam. Mine is together, but far from running at this point so I can't speak to the overall feel. Mine will only be a sunny day ice cream fetcher.
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1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far." |
10-17-2018, 12:39 PM | #16 | |
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Join Date: Aug 2012
Location: Northeast KS
Posts: 1,789
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Re: Building a 5.3 looking for horsepower
Quote:
Your BTR cam will add that horsepower with proper tune and headers, you won't see extra with the headers. My LQ9 based 6.0 with the following mods puts 425hp to the ground:. LS6 intake, FMS F13 cam (230/232, .595/.585, 112+4), 1 3/4" primary tube mid length headers. Equates to over 500ho at the crank with a conservative 18% drivetrain loss. And it has a nice big flat torque curve. That rwhp number is backed up with a scale ticket and ET at the dragstrip.
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1999 GMC Suburban K2500 SLT, 454/4L80E 1991 Z/28, 6.0L/T56 1949 GMC 250, S10 Frame, 6.0L/4L80E Instagram @aceshighspeedshop |
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10-20-2018, 08:58 AM | #17 |
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Join Date: Apr 2004
Location: Boiling Springs, PA
Posts: 435
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Re: Building a 5.3 looking for horsepower
personal opinions:
cam around 216/224 .600 lift 112 LSA 108 ICL or even as tight as 110 LSA 106ICL convertor 2800 headers if you like the look/ sound...they won't add a whole lot of power portwork on the heads will help, mill .030 off. You don't need crazy CNC just basic head work by someone who knows the cathedral heads well. VJ + bowl work mostly.
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71 C10 long bed, 2003 6.0L, 06GTO E40, T56, 12bolt 4.10 rear |
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